java 过滤文件

package io;

import java.io.File;
import java.util.Arrays;

public class DirList {

    public static void filterFile(String[] regexes) {
        File path=new File("D:\\");
        String[] list;
        if(regexes.length==0){
            list=path.list();
        }else{
            list=path.list(new DirFilter(regexes[0]));
        }
        Arrays.sort(list,String.CASE_INSENSITIVE_ORDER);
        for(String dirItem:list){
            System.out.println(dirItem);
        }
    }
}

package io;

import java.io.File;
import java.io.FilenameFilter;
import java.util.regex.Pattern;

public class DirFilter implements FilenameFilter {
    private Pattern pattern;
   
    public DirFilter(String regex){
        pattern=Pattern.compile(regex);
    }
    @Override
    public boolean accept(File file, String fileName) {
        return pattern.matcher(fileName).matches();
    }

}

package io;

public class TestFileFilter {

    public static void main(String[] args) {
        //String[]regex={"^(\\d|\\w|\u4e00-\u9fa5)+\\.zip{1}"};
        //String[]regex={"^(\\d|\\w|[\u4e00-\u9fa5]+)+\\.zip{1}"};
        String[]regex={".+\\.zip"};
        DirList.filterFile(regex);
    }
}

正则表达式写法： ".+\\.zip”    . 表示任意字符 \\.表示点