文件夹遍历 Java 版

Java下的File类（文件类，其实感觉文件类有点误导性，用“文件路径”会好一点）有list方法，会返回指定路径下所有文件和目录，用这个方法以及简单的递归可以写出一个简陋的文件遍历程序

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class test_for_team_study_2
{
	public static void traverse(String name, FileWriter wt) throws IOException
	{
		wt.write(name + "\r\n");
		File path = new File(name);
		String[] list = path.list();
		if( null == list )
			return ;
		for(int i = 0; i < list.length; i ++)
			if( -1 == list[i].indexOf(".") )
				traverse(name + "/" + list[i], wt);
	}
	
	public static void main(String[] args) throws IOException
	{
		FileWriter wt = new FileWriter("C:/Users/Administrator/Desktop/file in D.out");
		String name = "D:/";
		File path = new File(name);
		String[] list = path.list();
		for(int i = 0; i < list.length; i ++)
		{
			wt.write("now is the file#:" + i + "\r\n==========================\r\n");
			traverse(name + "/" + list[i], wt);
			wt.write("\r\n\r\n\r\n");
		}
		wt.flush();
		wt.close();
		System.out.println("finished!");
	}
}