删除一个文件夹目录并保留根目录

public static boolean deletefile(String delpath) {

File file = new File(delpath);
// 当且仅当此抽象路径名表示的文件存在且 是一个目录时，返回 true
if (!file.isDirectory()) {
file.delete();
} else if (file.isDirectory()) {
String[] filelist = file.list();
for (int i = 0; i < filelist.length; i++) {
File delfile = new File(delpath + "\\" + filelist[i]);
if (!delfile.isDirectory()) {
delfile.delete();
} else if (delfile.isDirectory()) {
deletefile(delpath + "\\" + filelist[i]);
}
}
if (!file.toString().equals(TEST_PATH)) {
file.delete();
}
}
return true;
}