递归删除目录下的所有文件

import java.io.File;

public class DeleteDirectory {
/**
* 删除空目录
* @param dir 将要删除的目录路径
*/
private static void doDeleteEmptyDir(String dir) {
boolean success = (new File(dir)).delete();
if (success) {
System.out.println("Successfully deleted empty directory: " + dir);
} else {
System.out.println("Failed to delete empty directory: " + dir);
}
}

/**
* 递归删除目录下的所有文件及子目录下所有文件
* @param dir 将要删除的文件目录
* @return boolean Returns "true" if all deletions were successful.
* If a deletion fails, the method stops attempting to
* delete and returns "false".
*/
private static boolean deleteDir(File dir) {
if (dir.isDirectory()) {
String[] children = dir.list();
　　　　　　　//递归删除目录中的子目录下
for (int i=0; i<children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
// 目录此时为空，可以删除
return dir.delete();
}
/**
*测试
*/
public static void main(String[] args) {
doDeleteEmptyDir("new_dir1");
String newDir2 = "new_dir2";
boolean success = deleteDir(new File(newDir2));
if (success) {
System.out.println("Successfully deleted populated directory: " + newDir2);
} else {
System.out.println("Failed to delete populated directory: " + newDir2);
}
}
}