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();
}