package com.xiaobu.daily;

import java.io.File;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**
 * @author xiaobu
 * @version JDK1.8.0_171
 * @date on  2019/1/4 18:44
 * @description V1.0
 */
public class FileSort {
    public static void main(String[] args) {

        String path = "E:\\Project\\hanswx\\target\\hanswx\\upload\\upload";

        List<File> list = getFileSort(path);

        for (File file : list) {
            System.out.println(file.getName() + " : " + file.lastModified());
        }
    }

    /**
     * 获取目录下所有文件(按时间排序)
     *
     */
    public static List<File> getFileSort(String path) {

        List<File> list = getFiles(path, new ArrayList<File>());

        if (list.size() > 0) {

            list.sort(new Comparator<File>() {
                public int compare(File file, File newFile) {
                    return Long.compare(newFile.lastModified(), file.lastModified());

                }
            });

        }

        return list;
    }

    /**
     *
     * 获取目录下所有文件
     *
     */
    public static List<File> getFiles(String realpath, List<File> files) {

        File realFile = new File(realpath);
        if (realFile.isDirectory()) {
            File[] subfiles = realFile.listFiles();
            assert subfiles != null;
            for (File file : subfiles) {
                if (file.isDirectory()) {
                    getFiles(file.getAbsolutePath(), files);
                } else {
                    files.add(file);
                }
            }
        }
        return files;
    }
}