java，

java，

import java.io.File; 
public class DeleteDirTest3 {
	public static void main(String[] args){
		File dir = new File("d:\\dir");
		deleteDir(dir);
	}
	private static void deleteDir(File dir) {
		File[] files = dir.listFiles();
		for(File file : files){
			if(file.isFile()){
				file.delete();
			}else{
				deleteDir(file);
			}
		}
	dir.delete();
}