java中IO递归写入

package cn.stat.p1.file;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class textdemo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        File fl=new File("D:\java");
        FilenameFilter  filter=new FilenameFilter(){

            @Override
            public boolean accept(File dir, String name) {
                // TODO Auto-generated method stub
                return name.endsWith(".java");
            }
            
        };
        List<File> list=new ArrayList<File>();
        getFiles(fl,filter,list);
        File fos=new File("D:\java\info.txt");
        wirtefiles(list,fos);
    
    }
    
    public static void getFiles(File dir,FilenameFilter filter,List<File> list)
    {
        File[] files=dir.listFiles();
        
        for(File file : files)
        {
            if(file.isDirectory())
            {
                getFiles(file,filter,list);
            }else
            {
                if(filter.accept(file,file.getName()))
                {
                    list.add(file);
                }
            }
        }
            
    }
    public static void wirtefiles(List<File> list,File desfile)
    {
        BufferedWriter bufw=null;
        try {
            bufw=new BufferedWriter(new FileWriter(desfile));
            for(File file : list)
            {
                bufw.write(file.getAbsolutePath());
                bufw.newLine();
                bufw.flush();
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            throw new RuntimeException("写不了");
        }finally
        {
            if(bufw!=null)
            {
                try {
                    bufw.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    throw new RuntimeException("关不了");
                }
            }
        }
    }

}