java实现删除文件夹及文件夹下所有文件

import java.io.File;

public class FileOperate {
	public static void main(String[] args) {

		String str = "d:\bb";
		File file = new File(str);
		FileOperate fp = new FileOperate();
		if (fp.deletedir(file)) {
			System.out.println("success");
		} else {
			System.out.println("failed!");

		}
	}

	public boolean deletefile(File f) {
		if (f.isFile())
			f.delete();
		return true;
	}

	public boolean deletedir(File f) {
		if (f.isDirectory()) {
			File[] files = f.listFiles();
			for (int i = 0; i < files.length; i++) {
				if (files[i].isDirectory())
					deletedir(files[i]);
				else
					deletefile(files[i]);
			}
		}
		f.delete();
		return true;
	}
}