FiltFilter接口的作用是得到一个目录下,指定的文件类型的File列表

package com.bins.dao;

import java.io.File;
import java.io.FileFilter;

public class MyFilter implements FileFilter {

private String extension;
public MyFilter(String extension){
this.extension=extension;
}

@Override
public boolean accept(File pathname) {
if(pathname.isDirectory()){
return false;
}

String name=pathname.getName();
return name.endsWith(extension);

}

}

---------------------------------------------------------------------------

package com.bins.dao;

import java.io.File;

public class TestFileFilter {
public static void main(String[] args){
TestFileFilter tff=new TestFileFilter();
tff.dir("F:\\不常用\\zml\\images", ".gif");
System.out.println("===============");
tff.dir("F:\\不常用\\zml\\images", ".jpg");
}

public void dir(String path,String extension){
File directory=new File(path);
MyFilter mf=new MyFilter(extension);
//把一个实现了FileFilter接口的类放到directory.lestFiles()方法,得到一个过滤后的File[]
File[] files=directory.listFiles(mf);

System.out.println("路径:\t"+path);
System.out.print("文件");
for(File file:files){
System.out.println("\t"+file.getName());
}
}
}

奈斯