树形文件读取和导出

最新推荐文章于 2024-01-14 00:17:30 发布

捕風捉影

最新推荐文章于 2024-01-14 00:17:30 发布

阅读量265

点赞数

分类专栏：工作学习文章标签： java 前端数据库

本文链接：https://blog.youkuaiyun.com/qq_44833327/article/details/131407187

版权

该程序从指定文件读取数据，将每一行转化为UserExampleExam对象，然后基于id和managerId建立父-子层级关系。处理后，将结果以特定格式写入新的文件。主要涉及数据的遍历、过滤、转换和递归操作。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.liuyang.service;

import java.io.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Collectors;

public class test {
    public static void main(String[] args) {
        // step 1: read the file
        try (BufferedReader br = new BufferedReader(new FileReader("C:\\Users\\86150\\Desktop\\test\\exam-data-2022.txt"))) {
            String line;
            /* each line of the file will be converted into an object and stored in a list */
            List<UserExampleExam> userExampleExams = new ArrayList<>();

            // step 2: read each line of the file
            while ((line = br.readLine()) != null) {
                // step 3: separate each line with a comma to form a new array
                String[] data = line.split(",");
                // step 4: encapsulate the array as an object
                UserExampleExam userExampleExam = DataStitching(data.length, data);
                // add the object to the list
                userExampleExams.add(userExampleExam);
            }

            // step 5: list parent-child relationships based on id and managerId
            List<UserExampleExam> newUserExampleExams = LoopOutput(userExampleExams);

            // step 6: format the result style and write to the result file
            output(newUserExampleExams);

        } catch (IOException e) {
            System.err.println("Failed to read file: " + e.getMessage());
        }
    }

    /**
     * file output
     * @param
     */
    private static void output(List<UserExampleExam> data) {
        try (BufferedWriter bw = new BufferedWriter(new FileWriter("C:\\Us

最低0.47元/天解锁文章