本例以Windows, JDK1.7 为基础，来演示使用Java 目录(文件夹)的删除。

目录和文件的删除都是会使用到File.delete();，但是在目录的删除上面，如果目录为空则可以删除，如果目录不为空则删除会失败。这时候需要先删除目录下面的文件，然后再来删除目录。

删除目录

FileDeleteDirectory.java

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package com.devnp.io;

import java.io.File;

public class FileDeleteDirectory {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		File file = new File("D:\\Person-Test\\temp\\1");

		deleteDirectory(file);
	}

	public static void deleteDirectory(File file) {

		if (file.isDirectory()) {
			//如果目录为空，则直接删除
			if (file.list().length == 0) {
				file.delete();

				System.out.println("Directory is deleted : " + file.getAbsolutePath());
			} else {
				File [] files = file.listFiles();

				for (File temp : files) {
					deleteDirectory(temp);
				}
				
				//当删除完成目录下面的所有文件，再来删除目录本身
				if (file.list().length == 0) {
					file.delete();
					System.out.println("Directory is deleted : " + file.getAbsolutePath());
				}
			}
		} else {
			//删除文件
			file.delete();
			
			System.out.println("File is deleted : " + file.getAbsolutePath());
		}
	}

}
运行：
测试：以删除D:\\Person-Test\\temp\\1目录为例 
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File is deleted : D:\Person-Test\temp\1\New folder\New folder\New Text Document.txt
Directory is deleted : D:\Person-Test\temp\1\New folder\New folder
Directory is deleted : D:\Person-Test\temp\1\New folder
Directory is deleted : D:\Person-Test\temp\1\New folder (2)
Directory is deleted : D:\Person-Test\temp\1

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