package com.walker.jdbc.util;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.Locale;
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import java.util.Set;
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import java.util.StringTokenizer;
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import java.util.TreeSet;
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import java.util.regex.Pattern;
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/**
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* Miscellaneous {@link String} utility methods.
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*
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* <p>Mainly for internal use within the framework; consider
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* <a href="http://jakarta.apache.org/commons/lang/">Jakarta's Commons Lang</a>
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* for a more comprehensive suite of String utilities.
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*
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* <p>This class delivers some simple functionality that should really
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* be provided by the core Java <code>String</code> and {@link StringBuilder}
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* classes, such as the ability to {@link #replace} all occurrences of a given
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* substring in a target string. It also provides easy-to-use methods to convert
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* between delimited strings, such as CSV strings, and collections and arrays.
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*
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* @author Rod Johnson
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* @author Juergen Hoeller
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* @author Keith Donald
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* @author Rob Harrop
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* @author Rick Evans
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* @author Arjen Poutsma
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* @since 16 April 2001
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*/
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public abstract class StringUtils {
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public static final String FOLDER_SEPARATOR = "/";
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private static final String WINDOWS_FOLDER_SEPARATOR = "\\";
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public static final String TOP_PATH = "..";
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private static final String CURRENT_PATH = ".";
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public static final char EXTENSION_SEPARATOR = '.';
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public static final char UNDERLINE = '_';
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public static final String STRING_UNDERLINE = "_";
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public static final String EMPTY_STRING = "";
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public static final String NULL_STRING = "null";
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public static final String SEPARATOR_COLON = ":";
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public static final String SEPARATOR_SEMI_COLON = ";";
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public static final String RETURN_AND_NEWLINE = "\r\n";
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public static final String DEFAULT_CHARSET_UTF8 = "UTF-8";
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/**
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* 分号常量
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*/
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public static final String SYMBOL_SEMICOLON = ";";
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public static final String SYMBOL_DOT = CURRENT_PATH;
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public static final String CHAR_PERCENT = "%";
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public static final String CHAR_AND = "&";
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public static final String CHAR_EQUALS = "=";
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public static final String CHAR_SPACE = " ";
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public static final String SINGLE_QUOTATION = "'";
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// springworker 引入的方法
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/**
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* 删除字符串中分隔符之前的内容，包括分隔符
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* @param source：源字符串
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* @param separator：分隔符
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* @return
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*/
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public static final String removeBefore(String source, String separator){
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if(StringUtils.isEmpty(source)){
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throw new NullPointerException();
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}
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int index = source.indexOf(separator);
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if(index+1 == source.length()){
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throw new IllegalArgumentException("There are no content after separator char! e.g:test.abc");
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}
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if(index >= 0){
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return source.substring(index+1, source.length());
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}
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return source;
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}
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/**
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* 查找给定的数组中是否包含指定的内容
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* @param source
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* @param dest
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* @return
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*/
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public static final boolean isContainValue(String[] source, String dest){
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if(source == null){
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return false;
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}
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for(String _s : source){
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if(_s.equals(dest)){
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return true;
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}
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}
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return false;
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}
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public static final Pattern generalCharPattern = Pattern.compile("^\\w+$");
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/**
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* 判断是否正常的字符A~Z
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* @param text
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* @return
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*/
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public static final boolean isNormalChar(String text){
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return generalCharPattern.matcher(text).matches();
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}
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/**
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* 删除掉字符串中最后拼接的逗号
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* @param sbStr
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* @return 返回最终字符串结果
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*/
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public static final String cutStringLaskComma(StringBuffer sbStr){
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if(sbStr.toString().endsWith(",")){
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sbStr.deleteCharAt(sbStr.lastIndexOf(","));
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}
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return sbStr.toString();
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}
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//---------------------------------------------------------------------
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// General convenience methods for working with Strings
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//---------------------------------------------------------------------
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/**
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* Check that the given CharSequence is neither <code>null</code> nor of length 0.
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* Note: Will return <code>true</code> for a CharSequence that purely consists of whitespace.
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* <p><pre>
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* StringUtils.hasLength(null) = false
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* StringUtils.hasLength("") = false
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* StringUtils.hasLength(" ") = true
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* StringUtils.hasLength("Hello") = true
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* </pre>
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* @param str the CharSequence to check (may be <code>null</code>)
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* @return <code>true</code> if the CharSequence is not null and has length
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* @see #hasText(String)
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*/
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public static boolean hasLength(CharSequence str) {
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return (str != null && str.length() > 0);
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}
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/**
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* Check that the given String is neither <code>null</code> nor of length 0.
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* Note: Will return <code>true</code> for a String that purely consists of whitespace.
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* @param str the String to check (may be <code>null</code>)
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* @return <code>true</code> if the String is not null and has length
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* @see #hasLength(CharSequence)
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*/
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public static boolean hasLength(String str) {
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return hasLength((CharSequence) str);
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}
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/**
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* Check whether the given CharSequence has actual text.
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* More specifically, returns <code>true</code> if the string not <code>null</code>,
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* its length is greater than 0, and it contains at least one non-whitespace character.
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* <p><pre>
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* StringUtils.hasText(null) = false
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* StringUtils.hasText("") = false
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* StringUtils.hasText(" ") = false
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* StringUtils.hasText("12345") = true
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* StringUtils.hasText(" 12345 ") = true
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* </pre>
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* @param str the CharSequence to check (may be <code>null</code>)
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* @return <code>true</code> if the CharSequence is not <code>null</code>,
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* its length is greater than 0, and it does not contain whitespace only
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* @see Character#isWhitespace
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*/
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public static boolean hasText(CharSequence str) {
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if (!hasLength(str)) {
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return false;
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}
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int strLen = str.length();
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for (int i = 0; i < strLen; i++) {
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if (!Character.isWhitespace(str.charAt(i))) {
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return true;
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}
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}
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return false;
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}
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/**
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* Check whether the given String has actual text.
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* More specifically, returns <code>true</code> if the string not <code>null</code>,
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* its length is greater than 0, and it contains at least one non-whitespace character.
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* @param str the String to check (may be <code>null</code>)
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* @return <code>true</code> if the String is not <code>null</code>, its length is
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* greater than 0, and it does not contain whitespace only
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* @see #hasText(CharSequence)
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*/
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public static boolean hasText(String str) {
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return hasText((CharSequence) str);
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}
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/**
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* Check whether the given CharSequence contains any whitespace characters.
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* @param str the CharSequence to check (may be <code>null</code>)
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* @return <code>true</code> if the CharSequence is not empty and
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* contains at least 1 whitespace character
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* @see Character#isWhitespace
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*/
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public static boolean containsWhitespace(CharSequence str) {
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if (!hasLength(str)) {
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return false;
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}
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int strLen = str.length();
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for (int i = 0; i < strLen; i++) {
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if (Character.isWhitespace(str.charAt(i))) {
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return true;
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}
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}
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return false;
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}
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/**
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* Check whether the given String contains any whitespace characters.
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* @param str the String to check (may be <code>null</code>)
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* @return <code>true</code> if the String is not empty and
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* contains at least 1 whitespace character
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* @see #containsWhitespace(CharSequence)
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*/
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public static boolean containsWhitespace(String str) {
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return containsWhitespace((CharSequence) str);
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}
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/**
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* Trim leading and trailing whitespace from the given String.
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* @param str the String to check
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* @return the trimmed String
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* @see Character#isWhitespace
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*/
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public static String trimWhitespace(String str) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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while (sb.length() > 0 && Character.isWhitespace(sb.charAt(0))) {
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sb.deleteCharAt(0);
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}
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while (sb.length() > 0 && Character.isWhitespace(sb.charAt(sb.length() - 1))) {
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sb.deleteCharAt(sb.length() - 1);
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}
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return sb.toString();
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}
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/**
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* Trim <i>all</i> whitespace from the given String:
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* leading, trailing, and inbetween characters.
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* @param str the String to check
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* @return the trimmed String
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* @see Character#isWhitespace
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*/
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public static String trimAllWhitespace(String str) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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int index = 0;
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while (sb.length() > index) {
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if (Character.isWhitespace(sb.charAt(index))) {
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sb.deleteCharAt(index);
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}
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else {
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index++;
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}
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}
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return sb.toString();
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}
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/**
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* Trim leading whitespace from the given String.
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* @param str the String to check
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* @return the trimmed String
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* @see Character#isWhitespace
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*/
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public static String trimLeadingWhitespace(String str) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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while (sb.length() > 0 && Character.isWhitespace(sb.charAt(0))) {
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sb.deleteCharAt(0);
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}
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return sb.toString();
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}
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/**
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* Trim trailing whitespace from the given String.
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* @param str the String to check
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* @return the trimmed String
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* @see Character#isWhitespace
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*/
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public static String trimTrailingWhitespace(String str) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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while (sb.length() > 0 && Character.isWhitespace(sb.charAt(sb.length() - 1))) {
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sb.deleteCharAt(sb.length() - 1);
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}
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return sb.toString();
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}
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/**
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* Trim all occurences of the supplied leading character from the given String.
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* @param str the String to check
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* @param leadingCharacter the leading character to be trimmed
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* @return the trimmed String
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*/
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public static String trimLeadingCharacter(String str, char leadingCharacter) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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while (sb.length() > 0 && sb.charAt(0) == leadingCharacter) {
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sb.deleteCharAt(0);
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}
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return sb.toString();
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}
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/**
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* Trim all occurences of the supplied trailing character from the given String.
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* @param str the String to check
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* @param trailingCharacter the trailing character to be trimmed
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* @return the trimmed String
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*/
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public static String trimTrailingCharacter(String str, char trailingCharacter) {
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if (!hasLength(str)) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str);
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while (sb.length() > 0 && sb.charAt(sb.length() - 1) == trailingCharacter) {
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sb.deleteCharAt(sb.length() - 1);
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}
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return sb.toString();
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}
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/**
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* Test if the given String starts with the specified prefix,
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* ignoring upper/lower case.
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* @param str the String to check
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* @param prefix the prefix to look for
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* @see String#startsWith
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*/
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public static boolean startsWithIgnoreCase(String str, String prefix) {
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if (str == null || prefix == null) {
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return false;
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}
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if (str.startsWith(prefix)) {
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return true;
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}
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if (str.length() < prefix.length()) {
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return false;
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}
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String lcStr = str.substring(0, prefix.length()).toLowerCase();
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String lcPrefix = prefix.toLowerCase();
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return lcStr.equals(lcPrefix);
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}
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/**
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* Test if the given String ends with the specified suffix,
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* ignoring upper/lower case.
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* @param str the String to check
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* @param suffix the suffix to look for
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* @see String#endsWith
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*/
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public static boolean endsWithIgnoreCase(String str, String suffix) {
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if (str == null || suffix == null) {
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return false;
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}
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if (str.endsWith(suffix)) {
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return true;
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}
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if (str.length() < suffix.length()) {
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return false;
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}
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String lcStr = str.substring(str.length() - suffix.length()).toLowerCase();
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String lcSuffix = suffix.toLowerCase();
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return lcStr.equals(lcSuffix);
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}
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/**
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* Test whether the given string matches the given substring
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* at the given index.
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* @param str the original string (or StringBuilder)
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* @param index the index in the original string to start matching against
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* @param substring the substring to match at the given index
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*/
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public static boolean substringMatch(CharSequence str, int index, CharSequence substring) {
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for (int j = 0; j < substring.length(); j++) {
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int i = index + j;
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if (i >= str.length() || str.charAt(i) != substring.charAt(j)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Count the occurrences of the substring in string s.
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* @param str string to search in. Return 0 if this is null.
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* @param sub string to search for. Return 0 if this is null.
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*/
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public static int countOccurrencesOf(String str, String sub) {
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if (str == null || sub == null || str.length() == 0 || sub.length() == 0) {
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return 0;
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}
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int count = 0;
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int pos = 0;
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int idx;
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while ((idx = str.indexOf(sub, pos)) != -1) {
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++count;
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pos = idx + sub.length();
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}
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return count;
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}
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/**
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* Replace all occurences of a substring within a string with
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* another string.
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* @param inString String to examine
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* @param oldPattern String to replace
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* @param newPattern String to insert
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* @return a String with the replacements
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*/
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public static String replace(String inString, String oldPattern, String newPattern) {
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if (!hasLength(inString) || !hasLength(oldPattern) || newPattern == null) {
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return inString;
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}
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StringBuilder sb = new StringBuilder();
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int pos = 0; // our position in the old string
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int index = inString.indexOf(oldPattern);
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// the index of an occurrence we've found, or -1
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int patLen = oldPattern.length();
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while (index >= 0) {
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sb.append(inString.substring(pos, index));
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sb.append(newPattern);
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pos = index + patLen;
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index = inString.indexOf(oldPattern, pos);
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}
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sb.append(inString.substring(pos));
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// remember to append any characters to the right of a match
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return sb.toString();
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}
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/**
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* Delete all occurrences of the given substring.
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* @param inString the original String
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* @param pattern the pattern to delete all occurrences of
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* @return the resulting String
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*/
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public static String delete(String inString, String pattern) {
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return replace(inString, pattern, "");
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}
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/**
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* Delete any character in a given String.
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* @param inString the original String
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* @param charsToDelete a set of characters to delete.
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* E.g. "az\n" will delete 'a's, 'z's and new lines.
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* @return the resulting String
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*/
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public static String deleteAny(String inString, String charsToDelete) {
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if (!hasLength(inString) || !hasLength(charsToDelete)) {
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return inString;
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}
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < inString.length(); i++) {
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char c = inString.charAt(i);
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if (charsToDelete.indexOf(c) == -1) {
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sb.append(c);
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}
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}
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return sb.toString();
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}
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//---------------------------------------------------------------------
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// Convenience methods for working with formatted Strings
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//---------------------------------------------------------------------
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/**
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* Quote the given String with single quotes.
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* @param str the input String (e.g. "myString")
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* @return the quoted String (e.g. "'myString'"),
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* or <code>null<code> if the input was <code>null</code>
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*/
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public static String quote(String str) {
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return (str != null ? "'" + str + "'" : null);
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}
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/**
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* Turn the given Object into a String with single quotes
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* if it is a String; keeping the Object as-is else.
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* @param obj the input Object (e.g. "myString")
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* @return the quoted String (e.g. "'myString'"),
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* or the input object as-is if not a String
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*/
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public static Object quoteIfString(Object obj) {
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return (obj instanceof String ? quote((String) obj) : obj);
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}
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/**
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* Unqualify a string qualified by a '.' dot character. For example,
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* "this.name.is.qualified", returns "qualified".
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* @param qualifiedName the qualified name
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*/
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public static String unqualify(String qualifiedName) {
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return unqualify(qualifiedName, '.');
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}
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/**
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* Unqualify a string qualified by a separator character. For example,
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* "this:name:is:qualified" returns "qualified" if using a ':' separator.
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* @param qualifiedName the qualified name
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* @param separator the separator
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*/
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public static String unqualify(String qualifiedName, char separator) {
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return qualifiedName.substring(qualifiedName.lastIndexOf(separator) + 1);
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}
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/**
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* Capitalize a <code>String</code>, changing the first letter to
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* upper case as per {@link Character#toUpperCase(char)}.
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* No other letters are changed.
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* @param str the String to capitalize, may be <code>null</code>
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* @return the capitalized String, <code>null</code> if null
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*/
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public static String capitalize(String str) {
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return changeFirstCharacterCase(str, true);
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}
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/**
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* Uncapitalize a <code>String</code>, changing the first letter to
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* lower case as per {@link Character#toLowerCase(char)}.
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* No other letters are changed.
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* @param str the String to uncapitalize, may be <code>null</code>
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* @return the uncapitalized String, <code>null</code> if null
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*/
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public static String uncapitalize(String str) {
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return changeFirstCharacterCase(str, false);
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}
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private static String changeFirstCharacterCase(String str, boolean capitalize) {
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if (str == null || str.length() == 0) {
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return str;
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}
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StringBuilder sb = new StringBuilder(str.length());
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if (capitalize) {
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sb.append(Character.toUpperCase(str.charAt(0)));
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}
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else {
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sb.append(Character.toLowerCase(str.charAt(0)));
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}
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sb.append(str.substring(1));
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return sb.toString();
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}
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/**
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* Extract the filename from the given path,
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* e.g. "mypath/myfile.txt" -> "myfile.txt".
|
* @param path the file path (may be <code>null</code>)
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* @return the extracted filename, or <code>null</code> if none
|
*/
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public static String getFilename(String path) {
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if (path == null) {
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return null;
|
}
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int separatorIndex = path.lastIndexOf(FOLDER_SEPARATOR);
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return (separatorIndex != -1 ? path.substring(separatorIndex + 1) : path);
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}
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/**
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* Extract the filename extension from the given path,
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* e.g. "mypath/myfile.txt" -> "txt".
|
* @param path the file path (may be <code>null</code>)
|
* @return the extracted filename extension, or <code>null</code> if none
|
*/
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public static String getFilenameExtension(String path) {
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if (path == null) {
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return null;
|
}
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int sepIndex = path.lastIndexOf(EXTENSION_SEPARATOR);
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return (sepIndex != -1 ? path.substring(sepIndex + 1) : null);
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}
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/**
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* Strip the filename extension from the given path,
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* e.g. "mypath/myfile.txt" -> "mypath/myfile".
|
* @param path the file path (may be <code>null</code>)
|
* @return the path with stripped filename extension,
|
* or <code>null</code> if none
|
*/
|
public static String stripFilenameExtension(String path) {
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if (path == null) {
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return null;
|
}
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int sepIndex = path.lastIndexOf(EXTENSION_SEPARATOR);
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return (sepIndex != -1 ? path.substring(0, sepIndex) : path);
|
}
|
|
/**
|
* Apply the given relative path to the given path,
|
* assuming standard Java folder separation (i.e. "/" separators).
|
* @param path the path to start from (usually a full file path)
|
* @param relativePath the relative path to apply
|
* (relative to the full file path above)
|
* @return the full file path that results from applying the relative path
|
*/
|
public static String applyRelativePath(String path, String relativePath) {
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int separatorIndex = path.lastIndexOf(FOLDER_SEPARATOR);
|
if (separatorIndex != -1) {
|
String newPath = path.substring(0, separatorIndex);
|
if (!relativePath.startsWith(FOLDER_SEPARATOR)) {
|
newPath += FOLDER_SEPARATOR;
|
}
|
return newPath + relativePath;
|
}
|
else {
|
return relativePath;
|
}
|
}
|
|
/**
|
* Parse the given <code>localeString</code> into a {@link Locale}.
|
* <p>This is the inverse operation of {@link Locale#toString Locale's toString}.
|
* @param localeString the locale string, following <code>Locale's</code>
|
* <code>toString()</code> format ("en", "en_UK", etc);
|
* also accepts spaces as separators, as an alternative to underscores
|
* @return a corresponding <code>Locale</code> instance
|
*/
|
public static Locale parseLocaleString(String localeString) {
|
String[] parts = tokenizeToStringArray(localeString, "_ ", false, false);
|
String language = (parts.length > 0 ? parts[0] : "");
|
String country = (parts.length > 1 ? parts[1] : "");
|
String variant = "";
|
if (parts.length >= 2) {
|
// There is definitely a variant, and it is everything after the country
|
// code sans the separator between the country code and the variant.
|
int endIndexOfCountryCode = localeString.indexOf(country) + country.length();
|
// Strip off any leading '_' and whitespace, what's left is the variant.
|
variant = trimLeadingWhitespace(localeString.substring(endIndexOfCountryCode));
|
if (variant.startsWith("_")) {
|
variant = trimLeadingCharacter(variant, '_');
|
}
|
}
|
return (language.length() > 0 ? new Locale(language, country, variant) : null);
|
}
|
|
/**
|
* Determine the RFC 3066 compliant language tag,
|
* as used for the HTTP "Accept-Language" header.
|
* @param locale the Locale to transform to a language tag
|
* @return the RFC 3066 compliant language tag as String
|
*/
|
public static String toLanguageTag(Locale locale) {
|
return locale.getLanguage() + (hasText(locale.getCountry()) ? "-" + locale.getCountry() : "");
|
}
|
|
|
//---------------------------------------------------------------------
|
// Convenience methods for working with String arrays
|
//---------------------------------------------------------------------
|
|
/**
|
* Copy the given Collection into a String array.
|
* The Collection must contain String elements only.
|
* @param collection the Collection to copy
|
* @return the String array (<code>null</code> if the passed-in
|
* Collection was <code>null</code>)
|
*/
|
public static String[] toStringArray(Collection<String> collection) {
|
if (collection == null) {
|
return null;
|
}
|
return collection.toArray(new String[collection.size()]);
|
}
|
|
/**
|
* Copy the given Enumeration into a String array.
|
* The Enumeration must contain String elements only.
|
* @param enumeration the Enumeration to copy
|
* @return the String array (<code>null</code> if the passed-in
|
* Enumeration was <code>null</code>)
|
*/
|
public static String[] toStringArray(Enumeration<String> enumeration) {
|
if (enumeration == null) {
|
return null;
|
}
|
List<String> list = Collections.list(enumeration);
|
return list.toArray(new String[list.size()]);
|
}
|
|
/**
|
* Split a String at the first occurrence of the delimiter.
|
* Does not include the delimiter in the result.
|
* @param toSplit the string to split
|
* @param delimiter to split the string up with
|
* @return a two element array with index 0 being before the delimiter, and
|
* index 1 being after the delimiter (neither element includes the delimiter);
|
* or <code>null</code> if the delimiter wasn't found in the given input String
|
*/
|
public static String[] split(String toSplit, String delimiter) {
|
if (!hasLength(toSplit) || !hasLength(delimiter)) {
|
return null;
|
}
|
int offset = toSplit.indexOf(delimiter);
|
if (offset < 0) {
|
return null;
|
}
|
String beforeDelimiter = toSplit.substring(0, offset);
|
String afterDelimiter = toSplit.substring(offset + delimiter.length());
|
return new String[] {beforeDelimiter, afterDelimiter};
|
}
|
|
/**
|
* Tokenize the given String into a String array via a StringTokenizer.
|
* Trims tokens and omits empty tokens.
|
* <p>The given delimiters string is supposed to consist of any number of
|
* delimiter characters. Each of those characters can be used to separate
|
* tokens. A delimiter is always a single character; for multi-character
|
* delimiters, consider using <code>delimitedListToStringArray</code>
|
* @param str the String to tokenize
|
* @param delimiters the delimiter characters, assembled as String
|
* (each of those characters is individually considered as delimiter).
|
* @return an array of the tokens
|
* @see StringTokenizer
|
* @see String#trim()
|
* @see #delimitedListToStringArray
|
*/
|
public static String[] tokenizeToStringArray(String str, String delimiters) {
|
return tokenizeToStringArray(str, delimiters, true, true);
|
}
|
|
/**
|
* Tokenize the given String into a String array via a StringTokenizer.
|
* <p>The given delimiters string is supposed to consist of any number of
|
* delimiter characters. Each of those characters can be used to separate
|
* tokens. A delimiter is always a single character; for multi-character
|
* delimiters, consider using <code>delimitedListToStringArray</code>
|
* @param str the String to tokenize
|
* @param delimiters the delimiter characters, assembled as String
|
* (each of those characters is individually considered as delimiter)
|
* @param trimTokens trim the tokens via String's <code>trim</code>
|
* @param ignoreEmptyTokens omit empty tokens from the result array
|
* (only applies to tokens that are empty after trimming; StringTokenizer
|
* will not consider subsequent delimiters as token in the first place).
|
* @return an array of the tokens (<code>null</code> if the input String
|
* was <code>null</code>)
|
* @see StringTokenizer
|
* @see String#trim()
|
* @see #delimitedListToStringArray
|
*/
|
public static String[] tokenizeToStringArray(
|
String str, String delimiters, boolean trimTokens, boolean ignoreEmptyTokens) {
|
|
if (str == null) {
|
return null;
|
}
|
StringTokenizer st = new StringTokenizer(str, delimiters);
|
List<String> tokens = new ArrayList<String>();
|
while (st.hasMoreTokens()) {
|
String token = st.nextToken();
|
if (trimTokens) {
|
token = token.trim();
|
}
|
if (!ignoreEmptyTokens || token.length() > 0) {
|
tokens.add(token);
|
}
|
}
|
return toStringArray(tokens);
|
}
|
|
/**
|
* Take a String which is a delimited list and convert it to a String array.
|
* <p>A single delimiter can consists of more than one character: It will still
|
* be considered as single delimiter string, rather than as bunch of potential
|
* delimiter characters - in contrast to <code>tokenizeToStringArray</code>.
|
* @param str the input String
|
* @param delimiter the delimiter between elements (this is a single delimiter,
|
* rather than a bunch individual delimiter characters)
|
* @return an array of the tokens in the list
|
* @see #tokenizeToStringArray
|
*/
|
public static String[] delimitedListToStringArray(String str, String delimiter) {
|
return delimitedListToStringArray(str, delimiter, null);
|
}
|
|
/**
|
* Take a String which is a delimited list and convert it to a String array.
|
* <p>A single delimiter can consists of more than one character: It will still
|
* be considered as single delimiter string, rather than as bunch of potential
|
* delimiter characters - in contrast to <code>tokenizeToStringArray</code>.
|
* @param str the input String
|
* @param delimiter the delimiter between elements (this is a single delimiter,
|
* rather than a bunch individual delimiter characters)
|
* @param charsToDelete a set of characters to delete. Useful for deleting unwanted
|
* line breaks: e.g. "\r\n\f" will delete all new lines and line feeds in a String.
|
* @return an array of the tokens in the list
|
* @see #tokenizeToStringArray
|
*/
|
public static String[] delimitedListToStringArray(String str, String delimiter, String charsToDelete) {
|
if (str == null) {
|
return new String[0];
|
}
|
if (delimiter == null) {
|
return new String[] {str};
|
}
|
List<String> result = new ArrayList<String>();
|
if ("".equals(delimiter)) {
|
for (int i = 0; i < str.length(); i++) {
|
result.add(deleteAny(str.substring(i, i + 1), charsToDelete));
|
}
|
}
|
else {
|
int pos = 0;
|
int delPos;
|
while ((delPos = str.indexOf(delimiter, pos)) != -1) {
|
result.add(deleteAny(str.substring(pos, delPos), charsToDelete));
|
pos = delPos + delimiter.length();
|
}
|
if (str.length() > 0 && pos <= str.length()) {
|
// Add rest of String, but not in case of empty input.
|
result.add(deleteAny(str.substring(pos), charsToDelete));
|
}
|
}
|
return toStringArray(result);
|
}
|
|
/**
|
* Convert a CSV list into an array of Strings.
|
* @param str the input String
|
* @return an array of Strings, or the empty array in case of empty input
|
*/
|
public static String[] commaDelimitedListToStringArray(String str) {
|
return delimitedListToStringArray(str, ",");
|
}
|
|
/**
|
* Convenience method to convert a CSV string list to a set.
|
* Note that this will suppress duplicates.
|
* @param str the input String
|
* @return a Set of String entries in the list
|
*/
|
public static Set<String> commaDelimitedListToSet(String str) {
|
Set<String> set = new TreeSet<String>();
|
String[] tokens = commaDelimitedListToStringArray(str);
|
for (String token : tokens) {
|
set.add(token);
|
}
|
return set;
|
}
|
|
/**
|
* 判断一个集合是否存在
|
* @param list
|
* @return 如果不存在，或者元素为0返回<code>true</code>
|
*/
|
public static boolean isEmptyList(List<?> list){
|
if(list == null || list.size() == 0) return true;
|
return false;
|
}
|
|
public static boolean isEmpty(String text){
|
if(text == null || text.trim().equals("") || text.equalsIgnoreCase(NULL_STRING)){
|
return true;
|
}
|
return false;
|
}
|
|
public static boolean isNotEmpty(String text){
|
if(text != null && !text.trim().equals("") && !text.equalsIgnoreCase(NULL_STRING)){
|
return true;
|
}
|
return false;
|
}
|
|
public static final long[] toArray(List<Long> list){
|
if(list == null){return null;}
|
long[] result = new long[list.size()];
|
for(int i=0; i<list.size(); i++){
|
result[i] = list.get(i);
|
}
|
return result;
|
}
|
|
public static final String DEFAULT_SPLIT_SEPARATOR = ",";
|
|
/**
|
* 把字符串分割成字符串数组，默认分隔符为英文逗号(,)</br>
|
* 如果需要自定义分隔符，请使用<code>stringToArray</code>方法。
|
* @param val
|
* @return
|
* @see {@link#stringToArray(String val, String separator)}
|
*/
|
public static String[] toArray(String val){
|
return stringToArray(val, DEFAULT_SPLIT_SEPARATOR);
|
}
|
|
/**
|
* 把字符串分割成字符串数组
|
* @param val 原始字符串
|
* @param separator 分隔符
|
* @return
|
*/
|
public static String[] stringToArray(String val, String separator){
|
if(StringUtils.isEmpty(val)) return null;
|
String[] _vals = val.split(separator);
|
if(_vals.length > 0){
|
for(String s : _vals){
|
if(StringUtils.isEmpty(s)){
|
throw new NullPointerException("empty split string: not found.");
|
} else{
|
s = s.trim();
|
}
|
}
|
return _vals;
|
}
|
return null;
|
}
|
|
public static boolean isNumeric(String str) {
|
if (str == null)
|
return false;
|
int sz = str.length();
|
for (int i = 0; i < sz; i++)
|
if (!Character.isDigit(str.charAt(i)))
|
return false;
|
|
return true;
|
}
|
|
public static boolean isNumericSpace(String str) {
|
if (str == null)
|
return false;
|
int sz = str.length();
|
for (int i = 0; i < sz; i++)
|
if (!Character.isDigit(str.charAt(i)) && str.charAt(i) != ' ')
|
return false;
|
|
return true;
|
}
|
|
private static Pattern numberPattern = Pattern.compile("[0-9]*");
|
|
/**
|
* 返回给定的字符串对象类型：Double | Long | String
|
* @param str
|
* @return
|
*/
|
public static Class<?> getNumbericType(String str){
|
if(StringUtils.isEmpty(str)){
|
return String.class;
|
}
|
int index = str.indexOf(StringUtils.SYMBOL_DOT);
|
if(index > 0){//判断是否有小数点
|
if(index == str.lastIndexOf(StringUtils.SYMBOL_DOT) && str.split("\\.").length==2){ //判断是否只有一个小数点
|
boolean result = numberPattern.matcher(str.replace(StringUtils.SYMBOL_DOT, StringUtils.EMPTY_STRING)).matches();
|
if(result){
|
return Double.class;
|
}
|
}
|
return String.class;
|
}else {
|
boolean result = numberPattern.matcher(str).matches();
|
if(result){
|
return Long.class;
|
}
|
return String.class;
|
}
|
}
|
|
/**
|
* 把字符串数组转换成List对象
|
* @param arrays
|
* @return
|
*/
|
public static final List<String> asList(String[] arrays){
|
if(arrays == null) return null;
|
List<String> result = new ArrayList<String>(arrays.length);
|
for(String s : arrays){
|
result.add(s);
|
}
|
return result;
|
}
|
|
public static final String NUMBER_SET = "1234567890";
|
public static final String NORMAL_SET = "1234567890abcdefghijkmnpqrstuvwxyz";
|
|
/**
|
* 生成给定位数的随机数字串
|
* @param length 位数值（1~10）
|
* @return
|
*/
|
public static final String generateRandomNumber(int length){
|
if(length > 10 || length < 0){
|
throw new IllegalArgumentException("请指定1~10之间的值");
|
}
|
StringBuilder retStr = new StringBuilder(length);
|
// boolean bDone = true;
|
// do {
|
// retStr = StringUtils.EMPTY_STRING;
|
// int count = 0;
|
for (int i = 0; i < length; i++) {
|
double dblR = Math.random() * NUMBER_SET.length();
|
int intR = (int) Math.floor(dblR);
|
// char c = NUMBER_SET.charAt(intR);
|
// if (('0' <= c) && (c <= '9')) {
|
// count++;
|
// }
|
retStr.append(NUMBER_SET.charAt(intR));
|
// retStr += strTable.charAt(intR);
|
}
|
// if (count >= 2) {
|
// bDone = false;
|
// }
|
// } while (bDone);
|
return retStr.toString();
|
}
|
|
}
|
