Java-IO[实现对目录的遍历以及删除(包含子目录)]

package kevin.io;

import java.io.File;

public class DeleteDirectory {

	public static void main(String[] args) {
		DeleteDirectory delDir=new DeleteDirectory();
		try {
			delDir.listDirectory(new File("test"));
			delDir.deleteDirectory(new File("test"));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/*
	 * 迭代方式
	 * 列出dir目录下所有文件(包含子目录)
	 */
	public void listDirectory(File dir) throws Exception{			
		if (!dir.exists()) {
			throw new Exception(dir+" is not exist");
		}
		if (!dir.isDirectory()) {
			throw new Exception(dir+" is not a directory");
		}
		File[] files=dir.listFiles();		
		for(File file: files){
			if (file.isDirectory()) {
				listDirectory(file);
			}
			else{
				System.out.println(file);	
			}
		}
	}
	/*
	 * 迭代方式
	 * 删除指定目录以及下的所有文件(包含子目录)
	 */
	public void deleteDirectory(File dir) throws Exception 
	{
		if (!dir.exists()) 
		{
			throw new Exception(dir+" is not exist");
		}
		if (!dir.isDirectory()) 
		{
			throw new Exception(dir+" is not a directory");
		}	
		File[] files=dir.listFiles();	
		if (files!=null && files.length>0) 
		{
			for(File file: files){
				if (file.isDirectory())
				{
					deleteDirectory(file);
				}
				else
				{
					System.out.println("即将删除的文件名称:"+file);
					if (!file.delete()) 
					{
						throw new Exception("can not delete the file:"+dir);
					}
				}
			}
			System.out.println("即将删除的目录名称:"+dir);
			if (!dir.delete())
			{
				throw new Exception("can not delete the dir:"+dir);
			}			
		}	
	}

}

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