package cn.ksource.core.util;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.math.BigDecimal;
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import java.net.URLEncoder;
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import java.util.*;
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import org.apache.commons.lang.StringEscapeUtils;
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import org.apache.commons.lang.StringUtils;
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public class ConvertUtil {
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public static Boolean obj2Boolean(Object obj){
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return obj == null ? false : Boolean.getBoolean(obj.toString());
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}
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public static Double obj2Double(Object obj){
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if (obj == null) {
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return null;
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}
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return StringUtil.isBlank(obj2Str(obj)) ? null : Double.valueOf(obj.toString());
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}
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public static void main(String[] args) {
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String str = "0.123";
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System.out.println(obj2Double(str));
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}
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/**
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* List转Map
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* @param dataList
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* @param key
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* @return
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* 作者：杨凯
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*/
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public static Map list2Map(List<Map> dataList,Object key){
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Map resultMap = new HashMap();
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if (dataList != null && dataList.size() > 0) {
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for (Map map : dataList) {
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if (map.get(key) != null) {
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resultMap.put(map.get(key), map);
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}
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}
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}
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return resultMap;
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}
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/**
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* List转Map
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* @param dataList
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* @param key
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* @param value
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* @return
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* 作者：杨凯
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*/
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public static Map list2Map(List<Map> dataList,Object key,Object value){
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Map resultMap = new LinkedHashMap();
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if (dataList != null && dataList.size() > 0) {
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for (Map map : dataList) {
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resultMap.put(map.get(key), map.get(value));
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}
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}
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return resultMap;
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}
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/**
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* 如果为空，使用提供的值替换
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* @param obj
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* @param o
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* @return
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* 作者：杨凯
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*/
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public static Object defaultIfEmpty(Object obj,Object o){
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return obj == null || StringUtils.isBlank(obj.toString()) || StringUtils.equalsIgnoreCase(obj.toString(), "null") ? o : obj;
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}
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/**將GBK转化为GBK
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* @param str
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* @return
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* 作者：杨凯
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*/
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public static String gbk2UTF8(String str){
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if (StringUtils.isBlank(str)) {
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return str;
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}
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try {
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str = URLEncoder.encode(str, "UTF-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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return str;
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}
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public static String html2Text(String html){
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return html.replaceAll("<[^>]+>", "").replaceAll(" ","");
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}
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/**
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* 功能描述：Object类转换为String，避免在Object为null时，直接toString()出错<BR>
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* @param obj
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* @return
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* @author:杨凯<BR>
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* 时间：Mar 22, 2009 10:17:29 PM<BR>
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*/
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public static String obj2Str(Object obj) {
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return obj == null ? null : obj.toString();
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}
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public static String obj2StrBlank(Object obj) {
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return obj == null ? "" : obj.toString();
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}
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public static Integer obj2Integer(Object obj){
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return obj == null || obj.toString().trim().equals("") ? null : Integer.parseInt(obj.toString());
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}
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public static int obj2Int(Object obj){
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if(null==obj) {
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System.out.println("1121313");
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}
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return obj == null || obj.toString().trim().equals("") ? null : Double.valueOf(obj.toString()).intValue();
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}
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public static Long obj2Long(Object obj){
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return obj == null || obj.toString().trim().equals("") ? null : Long.parseLong(obj.toString());
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}
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public static Long obj2Long(Object obj,boolean filter){
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if (!filter) {
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return obj == null || obj.toString().trim().equals("") ? null : Long.parseLong(obj.toString());
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} else {
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return obj == null || obj.toString().trim().equals("") ? null : Long.parseLong(obj.toString().replaceAll("[^0-9]", ""));
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}
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}
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/**
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* 功能描述：过滤用户输入的html、sql、javascript脚本<BR>
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* @param map
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* @return
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* @author:杨凯<BR>
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* 时间：Mar 23, 2009 3:41:12 PM<BR>
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*/
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public static Map filter(Map<String,Object> map) {
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Map resultMap = new HashMap();
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for (Map.Entry entry : map.entrySet()) {
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String value = StringEscapeUtils.escapeHtml(ConvertUtil.obj2Str(entry.getValue()));
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value = StringEscapeUtils.escapeSql(value);
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value = StringEscapeUtils.escapeJavaScript(value);
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resultMap.put(entry.getKey(), value);
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}
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return resultMap;
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}
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public static Map<String, Object> beanToMap(Object model) {
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Map resultMap = new HashMap();
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if (model == null)
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return null;
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List<Field> fieldList = new ArrayList<Field>();
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Class class1 = (Class) model.getClass();
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Class upClasses = class1.getSuperclass();
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//添加父类属性
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fieldList.addAll(Arrays.asList(upClasses.getDeclaredFields()));
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//添加类属性
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fieldList.addAll(Arrays.asList(class1.getDeclaredFields()));
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for (Field field : fieldList) {
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String fieldName = field.getName();
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Object fieldValue=null;
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try {
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Method method = class1.getMethod(
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"get" + Character.toUpperCase(fieldName.charAt(0))
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+ fieldName.substring(1), model.getClass());
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fieldValue = method.invoke(class1, null);
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} catch (Exception e) {
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try {
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if (!Modifier.isPublic(field.getModifiers())) {
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field.setAccessible(true);
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}
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fieldValue = field.get(model);
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} catch (Exception exception) {
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}
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}
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if (fieldValue != null) {
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if (fieldValue instanceof String) {
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String fieldValueString = String.valueOf(fieldValue);
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if (StringUtils.isNotBlank(fieldValueString)) {
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resultMap.put(fieldName, fieldValueString.trim()); // 处理查询参数
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}
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} else if(fieldValue instanceof Long ||fieldValue instanceof Integer){
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resultMap.put(fieldName, fieldValue);
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//getConditionMap(fieldValue);// 处理查询参数TODO
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}
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}
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}
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return resultMap;
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}
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/**
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* 将byte转化为K或M，大于1024K的按M计算，返回*K或*M
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* @param byteSize
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* @param scale 保留小数位数
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* @return
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*/
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public static String byte2KM(double byteSize, int scale) {
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BigDecimal b1 = new BigDecimal(byteSize);
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BigDecimal b2 = new BigDecimal(1024);
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double k = b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
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//大于1024，转化为M
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if (k > 1024) {
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b2 = new BigDecimal(1024*1024);
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k = b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
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return k + "M";
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}
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return k + "K";
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}
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}
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