JAVA删除本地目录下所有文件以及目录

public static boolean rm_r(String dirpath){	
	File f = new File(dirpath);		
	if(f.isDirectory()){
		File[] fl= f.listFiles();		
		for(File fs: fl){
			rm_r(fs.toString());
		}
	}
	return f.delete();		
}