html子集目录是什么,获取指定文件夹下（包含子目录）指定类型文件的集合

package Demo;

import java.io.*;

import java.util.*;

public class writeListToFile {

public static void main(String[] args) {

// TODO Auto-generated method stub

File dir = new File("E:\\");

List list = new ArrayList();

fileTolist(dir,list);

//System.out.println(list.get(0));

//                System.out.println(list.size());

//备份到文件的操作或输出这里我是写到文件中的，输出太多了

File filename = new File(dir,"writeToList.txt");

writeToList(list, filename.toString());

}

public static void fileTolist(File dir,List list)

{

File []files = dir.listFiles();

for (File f : files)

{

if (f.isDirectory())

{

fileTolist(f,list);

}

else

{

if (f.getName().endsWith(".java"))

{

list.add(f);

}

}

}

}

public static void writeToList(List list,String filename)

{

BufferedWriter br = null;

try {

br = new BufferedWriter(new FileWriter(filename));

for (File f:list)

{

String path = f.getAbsolutePath();

br.write(path);

br.newLine();

br.flush();

}

} catch (Exception e) {

// TODO: handle exception

e.printStackTrace();

}

finally

{

try {

if (br!=null)

{

br.close();

}

} catch (Exception e2) {

// TODO: handle exception

e2.printStackTrace();

}

}

}

}