Java练手项目：校园兼职系统

主界面展示：

package View;

import User.User;

import java.io.*;
import java.text.ParseException;
import java.util.*;

import User.JobType;
import User.Job;

public class IndexVIew {
    public static void main(String[] args) {
        JobView jobView = new JobView();
        File file = new File("E:\idea_workspace\jianzhi2\src\Information\工作信息.txt");
        File file1 = new File("E:\idea_workspace\jianzhi2\src\Information\工作类型.txt");

        try {
            FileInputStream fis = new FileInputStream("E:\idea_workspace\jianzhi2\src\Information\基本注册信息.txt");
            ObjectInputStream ois = new ObjectInputStream(fis);
            ArrayList users = new ArrayList();
            while (fis.available() > 0) {
                Object obj = ois.readObject();
                users.add((User) obj);
            }

            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("E:\idea_workspace\jianzhi2\src\Information\用户基本信息.txt")));
            BufferedReader reader1 = new BufferedReader(new InputStreamReader(new FileInputStream("E:\idea_workspace\jianzhi2\src\Information\工作信息.txt")));
            BufferedReader reader2 = new BufferedReader(new InputStreamReader(new FileInputStream("E:\idea_workspace\jianzhi2\src\Information\工作类型.txt")));
            FileInputStream fis1 = new FileInputStream(file);
            ObjectInputStream ois1 = new ObjectInputStream(fis1);
            FileInputStream fis2 = new FileInputStream(file1);
            ObjectInputStream ois2 = new ObjectInputStream(fis2);
            ArrayList jobTypes = new ArrayList();
            ArrayList jobs = new ArrayList();
            Map work = new HashMap();
            BaseInfoChangeOrDelivery baseInfoChangeOrDelivery = new BaseInfoChangeOrDelivery();
            while (fis1.available() > 0 & fis2.available() > 0) {
                Job job = (Job) ois1.readObject();
                JobType jobType = (JobType) ois2.readObject();
                jobTypes.add(jobType);
                jobs.add(job);
            }
            String str = null;
            String[] str1 = new String[2];
            String[] str2 = new String[2];
            String[] str3 = new String[2];
            Map info = new HashMap<>();
            while (true) {
                str = reader.readLine();
                if (str == null) {
                    break;
                }
                str1 = str.split(" ");
                str2 = str1[0].split(":");
                str3 = str1[1].split(":");
                info.put(str3[1], str2[1]);
            }
            LoginView loginView = new LoginView();
            Scanner scanner = new Scanner(System.in);
            System.out.println("欢迎使用系统，按“1”登录，按“2”注册,按”3“找回密码");
            int choose = scanner.nextInt();
            if (choose == 3) {
                loginView.Forget(users);
                System.out.println("请重新登录");
                choose = 1;
            }
            switch (choose) {
                case 2:
                    loginView.Register(info, users);
                case 1:
                    User user = loginView.Login(users);
                    boolean notend = true;
                    scanner.nextLine();
                    if (user != null) {
                        while (notend) {
                            System.out.println("当前为主界面，请选择功能");
                            SelfInfoManage selfInfoManage = new SelfInfoManage();
                            if (user.Admin == false) {
                                System.out.println("1.个人信息修改/查询 2.兼职申请 3.兼职结束提交 按”0“退出系统");
                                String choose1 = scanner.nextLine();
                                if (choose1.equals("1")) {
                                    System.out.println("1.修改基础内容 2.修改密码 3.查询信用等级 4.查询余额");
                                    String choose2 = scanner.nextLine();
                                    if (choose2.equals("1")) {
                                        selfInfoManage.changeInfo(user);
                                    } else if (choose2.equals("2")) {
                                        if (selfInfoManage.changePassword(user)) {
                                            user = loginView.Login(users);
                                        }
                                    } else if (choose2.equals("3")) {
                                        selfInfoManage.seeLevel(user);
                                    } else if (choose2.equals("4")) {
                                        selfInfoManage.seeBalance(user);
                                    }
                                } else if (choose1.equals("0")) {
                                    notend = false;
                                } else if (choose1.equals("2")) {
                                    if (work.isEmpty()){
                                        if (jobView.watchJob(user, jobs)){
                                            work = jobView.chooseJob(jobs,user);
                                            if (work.isEmpty()){
                                                continue;
                                            }
                                        }
                                    }else {
                                        System.out.println("您有未完成的兼职，请先提交完成");
                                    }
                                } else if (choose1.equals("3")) {
                                    if(jobView.endWork(user, jobTypes, work)){
                                        work.clear();
                                    }
                                }
                            } else if (user.Admin == true) {
                                System.out.println("1.个人信息修改 2.系统管理");
                                System.out.println("3.基本信息维护 按”0“退出系统");
                                String choose3 = scanner.nextLine();
                                if (choose3.equals("1")) {
                                    System.out.println("1.修改基础内容 2.修改密码 3.查询信用等级 4.查询余额");
                                    String choose2 = scanner.nextLine();
                                    if (choose2.equals("1")) {
                                        selfInfoManage.changeInfo(user);
                                    } else if (choose2.equals("2")) {
                                        if (selfInfoManage.changePassword(user)) {
                                            user = loginView.Login(users);
                                        }
                                    } else if (choose2.equals("3")) {
                                        selfInfoManage.seeLevel(user);
                                    } else if (choose2.equals("4")) {
                                        selfInfoManage.seeBalance(user);
                                    }
                                } else if (choose3.equals("3")) {
                                    baseInfoChangeOrDelivery.change(user, jobs, jobTypes, users);
                                } else if (choose3.equals("2")) {
                                    userManage userManage = new userManage();
                                    userManage.userchange();
                                } else if (choose3.equals("0")) {
                                    notend = false;
                                    break;
                                } else {
                                    System.out.println("输入错误");
                                }
                            }
                        }
                    }
            }
            FileOutputStream fos = new FileOutputStream("E:\idea_workspace\jianzhi2\src\Information\基本注册信息.txt");
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            for (User user : users){
                oos.writeObject(user);
                oos.flush();
            }
            oos.close();
            FileOutputStream fos1 = new FileOutputStream("E:\idea_workspace\jianzhi2\src\Information\工作信息.txt");
            ObjectOutputStream oos1 = new ObjectOutputStream(fos1);
            for (Job job : jobs){
                oos1.writeObject(job);
                oos1.flush();
            }
            oos1.close();
            FileOutputStream fos2 = new FileOutputStream("E:\idea_workspace\jianzhi2\src\Information\工作类型.txt");
            ObjectOutputStream oos2 = new ObjectOutputStream(fos2);
            for (JobType jobType : jobTypes){
                oos2.writeObject(jobType);
                oos2.flush();
            }
            oos2.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}

登录功能：

package View;

import User.User;

import javax.xml.crypto.Data;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;

public class LoginView {
    public void Register(Map map,ArrayList users) throws IOException {
        DataLog dataLog = new DataLog();
        Set keyset = map.keySet();
        //判断是否为校内用户
        boolean flag = false;
        boolean hasregister = false;
        boolean isAdmain = false;
        String register_name = null;
        String register_ID = null;
        Scanner scanner = new Scanner(System.in);
        boolean isend = false;
        while (!isend){
            System.out.println("请输入你的学号/教师号");
            String UID = scanner.nextLine();
            if (UID.startsWith("5")) {
                isAdmain = true;
            }
            //能否在用户信息中找到该用户
            for (String key : keyset){
                if (key.equals(UID)){
                    flag = true;
                    register_ID=key;
                    register_name=map.get(key);
                    break;
                }
            }
            if (flag == true){
                for (User user : users){
                    if (user.getUID().equals(register_ID)){
                        hasregister = true;
                        break;
                    }
                }
                if (hasregister == true) {
                    System.out.println("已被注册，请重新尝试");
                    continue;
                } else {
                    System.out.println("学号："+register_ID+" 姓名："+register_name+"将以学号作为用户名进行注册");
                    System.out.println("请输入密码");
                    String register_password = scanner.nextLine();
                    System.out.println("请输入性别");
                    String register_gender = scanner.nextLine();
                    System.out.println("请输入出生日期");
                    String register_brithday = scanner.nextLine();
                    System.out.println("请输入所属系部");
                    String register_department = scanner.nextLine();
                    System.out.println("请输入手机号");
                    String register_phonenumber = scanner.nextLine();
                    Calendar calendar = Calendar.getInstance();
                    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    String register_date = dateFormat.format(calendar.getTime());
                    users.add(new User(register_ID,register_name,register_password,register_department,register_phonenumber,register_gender,register_brithday,register_date,isAdmain,15,0));
                    User userinfo = users.get(users.size() - 1);
                    System.out.println(userinfo.toString()+"注册成功");
                    dataLog.LogData("新用户注册",userinfo);
                    isend = true;
                }
            }
        }

    }

    public User Login(ArrayList users) throws IOException {
        DataLog dataLog = new DataLog();
        Scanner scanner = new Scanner(System.in);
        boolean isend = false;
        while (!isend){
            System.out.println("请输入账户名");
            String login_username = scanner.nextLine();
            for (User user : users){
                if (user.getUID().equals(login_username)){
                    System.out.println("请输入密码");
                    String login_password = scanner.nextLine();
                    if (login_password.equals(user.getUserPassword())){
                        System.out.println("登录成功");
                        dataLog.LogData("尝试并成功登录",user);
                        return user;
                    }else {
                        System.out.println("密码错误,请按“1”重试或按“0”退出");
                        dataLog.LogData("尝试但登录失败",user);
                        String choose = scanner.nextLine();
                        if (choose.equals("1")){
                            Login(users);
                        } else if (choose.equals("0")){
                            return null;
                        } else {
                            System.out.println("输入错误，默认退出");
                            return null;
                        }
                    }
                }
            }
            System.out.println("未注册的用户，请按“1”重试或按“0”退出");
            String choose = scanner.nextLine();
            if (choose.equals("1")){
                continue;
            } else if (choose.equals("0")){
                return null;
            } else {
                System.out.println("输入错误，默认退出");
                return null;
            }
        }
        return null;
    }

    public void Forget(ArrayList users) throws IOException {
        DataLog dataLog = new DataLog();
        Scanner scanner = new Scanner(System.in);
        boolean isend = false;
        while (!isend){
            System.out.println("请输入需要找回密码的用户名");
            String forget_userID = scanner.nextLine();
            for (User user : users){
                if (user.getUID().equals(forget_userID)){
                    System.out.println("请输入你的姓名");
                    String forget_name = scanner.nextLine();
                    if (user.getUserName().equals(forget_name)){
                        System.out.println("验证成功");
                        System.out.println("您的密码是:"+user.getUserPassword());
                        dataLog.LogData("尝试并成功找回密码",user);
                        return;
                    }else {
                        dataLog.LogData("找回密码失败",user);
                        System.out.println("匹配失败,请按“1”重试或按“0”退出");
                        String choose = scanner.nextLine();
                        if (choose.equals("1")){
                            Login(users);
                        } else if (choose.equals("0")){
                            return;
                        } else {
                            System.out.println("输入错误，默认退出");
                            return;
                        }
                    }
                }
            }
        }

    }
}