【Java编程思想】IO篇-01

一、原文

package org.example.file;

import lombok.Data;

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

@Data
public class DirList {

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

/**
 * 目录过滤
 */
class DirFilter implements FilenameFilter {

    private Pattern pattern;

    public DirFilter(String regex) {
        System.out.println("regex:" + regex);
        pattern = Pattern.compile(regex);
    }

    @Override
    public boolean accept(File dir, String name) {
        System.out.println("name:" + name);
        return pattern.matcher(name).matches();
    }
}

二、见解

三、疑惑

四、提升