package com.walker.infrastructure.utils;
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import java.io.File;
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import java.io.IOException;
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/**
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* Utility methods for working with the file system.
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*
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* @author Rob Harrop
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* @author Juergen Hoeller
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* @since 2.5.3
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*/
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public abstract class FileSystemUtils {
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public static final String FILE_SCHEMA_WIN = "file:/";
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public static final String FILE_SCHEMA_STD = "file:///";
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/**
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* 去掉文件路径中的协议信息，如：
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* <pre>
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* file:///d:/test/my.log 去掉file:///
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* 在windows系统中也可能是file:/
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* </pre>
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* @param path 给定文件全路径信息
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* @return 返回修剪后的路径
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*/
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public static String trimFileSchema(String path){
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if(path.startsWith(FILE_SCHEMA_WIN)){
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path = path.substring(6);
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} else if(path.startsWith(FILE_SCHEMA_STD)){
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path = path.substring(8);
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}
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return path;
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}
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/**
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* Delete the supplied {@link File} - for directories,
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* recursively delete any nested directories or files as well.
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* @param root the root <code>File</code> to delete
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* @return <code>true</code> if the <code>File</code> was deleted,
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* otherwise <code>false</code>
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*/
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public static boolean deleteRecursively(File root) {
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if (root != null && root.exists()) {
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if (root.isDirectory()) {
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File[] children = root.listFiles();
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if (children != null) {
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for (File child : children) {
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deleteRecursively(child);
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}
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}
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}
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return root.delete();
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}
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return false;
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}
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/**
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* Recursively copy the contents of the <code>src</code> file/directory
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* to the <code>dest</code> file/directory.
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* @param src the source directory
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* @param dest the destination directory
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* @throws IOException in the case of I/O errors
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*/
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public static void copyRecursively(File src, File dest) throws IOException {
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Assert.isTrue(src != null && (src.isDirectory() || src.isFile()), "Source File must denote a directory or file");
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Assert.notNull(dest, "Destination File must not be null");
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doCopyRecursively(src, dest);
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}
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/**
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* Actually copy the contents of the <code>src</code> file/directory
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* to the <code>dest</code> file/directory.
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* @param src the source directory
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* @param dest the destination directory
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* @throws IOException in the case of I/O errors
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*/
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private static void doCopyRecursively(File src, File dest) throws IOException {
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if (src.isDirectory()) {
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dest.mkdir();
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File[] entries = src.listFiles();
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if (entries == null) {
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throw new IOException("Could not list files in directory: " + src);
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}
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for (File entry : entries) {
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doCopyRecursively(entry, new File(dest, entry.getName()));
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}
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}
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else if (src.isFile()) {
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try {
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dest.createNewFile();
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}
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catch (IOException ex) {
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IOException ioex = new IOException("Failed to create file: " + dest);
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ioex.initCause(ex);
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throw ioex;
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}
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FileCopyUtils.copy(src, dest);
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}
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else {
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// Special File handle: neither a file not a directory.
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// Simply skip it when contained in nested directory...
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}
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}
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public static void main(String[] args) throws Exception{
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File file = new File("d:/report.log");
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if(file.exists()){
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System.out.println("ok.");
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} else
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System.out.println("? not found");
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System.out.println(file.getAbsolutePath());
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System.out.println(file.getCanonicalPath());
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System.out.println(file.toURI());
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}
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}
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