控制台项目-学生管理系统（io流实现）-阿里云开发者社区

简介

该项目是我大一学习javaSE阶段写过的一个新手项目。适合处在学习JavaSE阶段的朋友作为阶段性练手项目，主要是练习一下基本的流程控制结构，循环结构，编写类、List集合的简单使用，IO的文件简单读取写入。

功能介绍

在控制台实现，登录，注册，学生信息增删查改，通过输出流把用户信息，学生信息写入文本文件，进行持久化存储，通过输入流把信息读取到内存打印到控制台实现查询。

目录结构:

运行示例

项目代码：

实现流程

定义学生类，用户类

 
public class Student {
    
    String id;//学号
    String name;//姓名
    String phone;//电话
    String major;//专业
    String address;//住址
    
    
    
    public Student(){}
    
    
    public  Student(String id,String name,String phone,String major,String address){
        this.id=id;
        this.name=name;
        this.phone=phone;
        this.major=major;
        this.address=address;
        
        
    }
    
    
    public String getAddress() {
        return address;
    }
 
 
    public void setAddress(String address) {
        this.address = address;
    }
 
 
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public String getMajor() {
        return major;
    }
    public void setMajor(String major) {
        this.major = major;
    }

 
public class Userinfo {
    String account;//账号
    String password;//密码
    
    
    public Userinfo(){}
    public Userinfo(String account, String password) {
        super();
        this.account = account;
        this.password = password;
    }
    public String getAccount() {
        return account;
    }
    public void setAccount(String account) {
        this.account = account;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

功能代码

 
public class StudentDemo {
    public static void main(String[] args) throws IOException {
        String fileName = "学生信息.txt";
        String fileName1 = "用户信息.txt";
        // 登录
        DL(fileName1);
        // 管理
        GL(fileName);
 
    }
 
    // 登录界面
    public static void DL(String fileName1) throws IOException {
 
        while (true) {
            boolean flag = false;
            System.out.println("**********xxxx学生管理系统**********");
            System.out.println("\t\t1.登录");
            System.out.println("\t\t2.注册");
            System.out.print("选择：");
            Scanner sc = new Scanner(System.in);
            String choose = sc.nextLine();
            switch (choose) {
            case "1":
                denglu(fileName1);
                flag = true;
                break;
            case "2":
                zhuce(fileName1);
                break;
            default:
                System.out.println("错误!!!");
                break;
            }
            if (flag) {
                break;
            }
        }
    }
 
    // 用户注册
    public static void zhuce(String fileName1) throws IOException {
        ArrayList<Userinfo> array = new ArrayList<Userinfo>();
        Scanner sc = new Scanner(System.in);
        dlReader(fileName1, array);
        while (true) {
            boolean flag = false;
            System.out.print("注册账号：");
            String account = sc.nextLine();
            // 判断是否已经注册过！！！！
            ///
 
            for (int i = 0; i < array.size(); i++) {
                Userinfo u1 = array.get(i);
                if (u1.getAccount().equals(account)) {
                    System.out.println("该用户已注册！！！");
                    flag = true;
                    break;
 
                }
 
            }
            if (flag) {
                zhuce(fileName1);// 不要放for循环里前否则会多次循环！！！！！！！
                break;
            }
            ///
            System.out.print("注册密码：");
            String password = sc.nextLine();
            System.out.print("确认密码：");
            String password1 = sc.nextLine();
 
            if (password.equals(password1)) {
                Userinfo u = new Userinfo();
                u.setAccount(account);
                u.setPassword(password1);
 
                array.add(u);
 
                dlWriter(fileName1, array);
 
                System.out.println("注册成功！");
                break;
 
            } else {
                System.out.println("密码不一致请重新注册！！！");
            }
        }
    }
 
    // 用户登录
    public static void denglu(String fileName1) throws IOException {
        ArrayList<Userinfo> array = new ArrayList<Userinfo>();
        Scanner sc = new Scanner(System.in);
        dlReader(fileName1, array);
 
        while (true) {
            boolean flag = false;
            System.out.print("登录账号：");
            String account = sc.nextLine();
            System.out.print("登录密码：");
            String password = sc.nextLine();
            for (int i = 0; i < array.size(); i++) {
                Userinfo u = array.get(i);
                if (u.getAccount().equals(account) && u.getPassword().equals(password)) {
                    System.out.println("登录成功！");
                    flag = true;
                    break;
                }
 
            }
            if (!flag) {
                System.out.println("账号或密码错误！！！");
            }
            if (flag) {
                break;
            }
        }
 
    }
 
    // 登录界面-读
    public static void dlReader(String fileName1, ArrayList<Userinfo> array) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader(fileName1));
 
        String line;
        while ((line = br.readLine()) != null) {
            String[] readDate = line.split("\t");
            Userinfo u = new Userinfo();
            u.setAccount(readDate[0]);
            u.setPassword(readDate[1]);
 
            array.add(u);
        }
        br.close();
    }
 
    // 登录界面-写
    public static void dlWriter(String fileName1, ArrayList<Userinfo> array) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter(fileName1));
        for (int i = 0; i < array.size(); i++) {
            Userinfo u = array.get(i);
            StringBuilder sb = new StringBuilder();
            sb.append(u.getAccount()).append("\t").append(u.getPassword());
            bw.write(sb.toString());
            bw.newLine();
            bw.flush();
 
        }
 
        bw.close();
 
    }
 
    // 管理界面
    public static void GL(String fileName) throws IOException {
        while (true) {
            System.out.println("**********xxxx学生管理系统**********");
            System.out.println("\t\t1.增");
            System.out.println("\t\t2.删");
            System.out.println("\t\t3.查");
            System.out.println("\t\t4.改");
            System.out.println("\t\t5.退");
            System.out.print("选择：");
            Scanner sc = new Scanner(System.in);
            String choose = sc.nextLine();
            switch (choose) {
            case "1":
                add(fileName);
                break;
            case "2":
                remove(fileName);
                break;
            case "3":
                fine(fileName);
                break;
            case "4":
                update(fileName);
                break;
            case "5":
                System.out.println("退出成功！");
                System.exit(0);
                break;
            default:
                System.out.println("错误！！！");
                break;
            }
        }
 
    }
 
    // 增
    public static void add(String fileName) throws IOException {
        ArrayList<Student> array = new ArrayList<Student>();
        Scanner sc = new Scanner(System.in);
        boolean flag = false;
        System.out.print("学号：");
        String id = sc.nextLine();
        glReader(fileName, array);
        for (int i = 0; i < array.size(); i++) {
            Student s = array.get(i);
            if (s.getId().equals(id)) {
                System.out.println("学号存在！！！");
                flag = true;
                break;
            }
        }
        if (flag) {
            add(fileName);
        }
        System.out.print("姓名：");
        String name = sc.nextLine();
        System.out.print("电话：");
        String phone = sc.nextLine();
        System.out.print("专业：");
        String major = sc.nextLine();
        System.out.print("地址：");
        String address = sc.nextLine();
 
        Student s = new Student();
        s.setId(id);
        s.setName(name);
        s.setPhone(phone);
        s.setMajor(major);
        s.setAddress(address);
        array.add(s);
 
        glWriter(fileName, array);
        System.out.println("添加成功！");
 
    }
 
    // 删
    public static void remove(String fileName) throws IOException {
        ArrayList<Student> array = new ArrayList<Student>();
        Scanner sc = new Scanner(System.in);
        glReader(fileName, array);
        while (true) {
            boolean flag = false;
            System.out.print("删除学号：");
            String id = sc.nextLine();
            for (int i = 0; i < array.size(); i++) {
                Student s = array.get(i);
                if (s.getId().equals(id)) {
                    System.out.println("学号存在！");
                    array.remove(i);
                    System.out.println("删除成功！");
                    flag = true;
                    break;
                } else if ((i == array.size() - 1) && (!s.getId().equals(id))) {
                    System.out.println("学号不存在！！！");
 
                }
 
            }
            if (flag) {
                break;
            }
        }
        glWriter(fileName, array);
    }
 
    // 查
    public static void fine(String fileName) throws IOException {
        ArrayList<Student> array = new ArrayList<Student>();
        Scanner sc = new Scanner(System.in);
        System.out.println("\t\t1.全部查询");
        System.out.println("\t\t2.关键字查询");
        System.out.print("选择：");
        String choose = sc.nextLine();
        switch (choose) {
        case "1":
            qbfine(fileName, array);
            break;
        case "2":
            gjfine(fileName, array);
            break;
        default:
            System.out.println("错误！！！");
            break;
        }
    }
 
    // 全部查询
    public static void qbfine(String fileName, ArrayList<Student> array) throws IOException {
        glReader(fileName, array);
        System.out.println("-------------------------------------------------------------------------");
        System.out.println("【学号】                【姓名】                【电话】                【专业】                【地址】");
        if (array.size() != 0) {
            for (int i = 0; i < array.size(); i++) {
                Student s = array.get(i);
                System.out.println(s.getId() + "    " + s.getName() + "\t    " + s.getPhone() + "\t  " + s.getMajor()
                        + "\t" + s.getAddress());
            }
        } else {
            System.out.println("无信息！！！");
        }
        System.out.println("-------------------------------------------------------------------------");
    }
 
    // 关键字查询
    public static void gjfine(String fileName, ArrayList<Student> array) throws IOException {
        glReader(fileName, array);
        Scanner sc = new Scanner(System.in);
        System.out.println("关键字：");
        String gj = sc.nextLine();
        System.out.println("-------------------------------------------------------------------------");
        System.out.println("【学号】                【姓名】                【电话】                【专业】                【地址】");
        if (array.size() != 0) {
            for (int i = 0; i < array.size(); i++) {
                Student s = array.get(i);
                if (s.getId().equals(gj) || s.getName().equals(gj) || s.getPhone().equals(gj) || s.getMajor().equals(gj)
                        || s.getAddress().equals(gj)) {
                    System.out.println(s.getId() + "    " + s.getName() + "\t    " + s.getPhone() + "\t  "
                            + s.getMajor() + "\t" + s.getAddress());
                } else if (i == array.size() - 1 && !s.getId().equals(gj) || s.getName().equals(gj)
                        || s.getPhone().equals(gj) || s.getMajor().equals(gj) || s.getAddress().equals(gj)) {
                    System.out.println("\t\t\t\t无信息！！！");
                }
            }
        } else {
            System.out.println("\t\t\t\t无信息！！！");
        }
 
        System.out.println("-------------------------------------------------------------------------");
    }
 
    // 改
    public static void update(String fileName) throws IOException {
        ArrayList<Student> array = new ArrayList<Student>();
        Scanner sc = new Scanner(System.in);
        glReader(fileName, array);
        while (true) {
            boolean flag = false;
            System.out.println("修改学号：");
            String id = sc.nextLine();
            for (int i = 0; i < array.size(); i++) {
                Student s = array.get(i);
                if (s.getId().equals(id)) {
                    System.out.print("新姓名：");
                    String name = sc.nextLine();
                    System.out.print("新电话：");
                    String phone = sc.nextLine();
                    System.out.print("新专业：");
                    String major = sc.nextLine();
                    System.out.print("新地址：");
                    String address = sc.nextLine();
 
                    s.setName(name);
                    s.setPhone(phone);
                    s.setMajor(major);
                    s.setAddress(address);
 
                    array.set(i, s);
                    System.out.println("修改成功！");
 
                    flag = true;
                    break;
                } else if ((i == array.size() - 1) && (!s.getId().equals(id))) {
                    System.out.println("学号不存在！！！");
 
                }
 
            }
            if (flag) {
                break;
            }
 
        }
        glWriter(fileName, array);
 
    }
 
    // 管理界面-读
    public static void glReader(String fileName, ArrayList<Student> array) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String line;
        while ((line = br.readLine()) != null) {
            String[] date = line.split(",");
            Student s = new Student();
            s.setId(date[0]);
            s.setName(date[1]);
            s.setPhone(date[2]);
            s.setMajor(date[3]);
            s.setAddress(date[4]);
 
            array.add(s);
 
        }
        br.close();
    }
 
    // 管理界面-写
    public static void glWriter(String fileName, ArrayList<Student> array) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter(fileName));
        for (int i = 0; i < array.size(); i++) {
            Student s = array.get(i);
            StringBuilder sb = new StringBuilder();
            sb.append(s.getId()).append(",").append(s.getName()).append(",").append(s.getPhone()).append(",")
                    .append(s.getMajor()).append(",").append(s.getAddress());
 
            bw.write(sb.toString());
            bw.newLine();
            bw.flush();
        }
        bw.close();
    }

控制台项目-学生管理系统（io流实现）

简介

功能介绍

运行示例

实现流程

定义学生类，用户类

功能代码

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