JavaSE项目实践——TCP服务器的学生管理系统代码实现（客户端）

JavaSE项目实践——TCP服务器的学生管理系统代码实现（客户端）

1.controller包

package ljt.client.controller;

import ljt.client.service.ClientService;
import ljt.client.tcp.ClientTcp;

public class ClientController {
    private ClientService service = new ClientService();

    private ClientTcp client = new ClientTcp();

    private static final String SUCCESS = "success";

    private static final String NOT_FOUND = "查无此人";
    private static final String EMPTY_SET = "无数据";

    public void login() {
        String s = service.loginMessage();

        client.sendMessage("login" + s);

        String s1 = client.receiveMessage();

        if (SUCCESS.equals(s1)) {
            System.out.println("登陆成功");
        } else {
            System.out.println("登陆失败");
            logout();
        }
    }

    public void logout() {
        client.sendMessage("close:");
        System.exit(0);
    }

    public void addStudent() {
        String studentJsonString = service.getStudent();
        String message = "addStudent:" + studentJsonString;

        client.sendMessage(message);

        String s = client.receiveMessage();
        System.out.println(s);
    }

    public void removeStudnet() {
        Integer id = findOne();

        if (id != -1 && service.confirm()) {
            client.sendMessage("deleteStu:" + id);
            System.out.println(client.receiveMessage());
        } else {
            System.out.println("删除操作撤销");
        }
    }

    public void modifyStudent() {
        Integer id = service.getStringId();

        client.sendMessage("findOne:" + id);
        String s = client.receiveMessage();

        if (NOT_FOUND.equals(s)) {
            System.out.println(s);
            return;
        }

        String jsonString = service.modifyStudent(s);
        client.sendMessage("modifyStu:" + jsonString);
        String s1 = client.receiveMessage();
        System.out.println(s1);
    }

    public Integer findOne() {
        Integer id = service.getStringId();

        client.sendMessage("finOne:" + id);
        String s = client.receiveMessage();

        if (NOT_FOUND.equals(s)) {
            System.out.println(s);
            return -1;
        }
        service.showStudent(s);

        return id;
    }

    public void findAll() {
        client.sendMessage("findAll:");

        String s = client.receiveMessage();

        if (EMPTY_SET.equals(s)) {
            System.out.println(s);
        } else {
            service.showStudentList(s);
        }
    }

    public void sortStu() {
        Integer choose = service.sortChoose();

        if (11 == choose) {
            return;
        }

        client.sendMessage("sortStu:" + choose);
        String s = client.receiveMessage();

        if (EMPTY_SET.equals(s)) {
            System.out.println(s);
        } else {
            service.showStudentList(s);
        }
    }

    public void filterStu() {
        String s = service.ageFilter();

        client.sendMessage("filterStu:" + s);
        String s1 = client.receiveMessage();

        if (EMPTY_SET.equals(s)) {
            System.out.println(s);
        } else {
            service.showStudentList(s1);
        }
    }
}

2.entity包

package ljt.client.entity;

public class Student {
    private Integer id;
    private String name;
    private Boolean gender;
    private Integer age;
    private Integer mathScore;
    private Integer chnScore;
    private Integer engScore;
    private Integer totalScore;
    private Integer rank;

    public Student() {
    }

    public Student(Integer id, String name, Boolean gender, Integer age, Integer mathScore, Integer chnScore, Integer engScore, Integer totalScore, Integer rank) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.mathScore = mathScore;
        this.chnScore = chnScore;
        this.engScore = engScore;
        this.totalScore = totalScore;
        this.rank = rank;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Boolean getGender() {
        return gender;
    }

    public void setGender(Boolean gender) {
        this.gender = gender;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Integer getMathScore() {
        return mathScore;
    }

    public void setMathScore(Integer mathScore) {
        this.mathScore = mathScore;
    }

    public Integer getChnScore() {
        return chnScore;
    }

    public void setChnScore(Integer chnScore) {
        this.chnScore = chnScore;
    }

    public Integer getEngScore() {
        return engScore;
    }

    public void setEngScore(Integer engScore) {
        this.engScore = engScore;
    }

    public Integer getTotalScore() {
        return totalScore;
    }

    public void setTotalScore(Integer totalScore) {
        this.totalScore = totalScore;
    }

    public Integer getRank() {
        return rank;
    }

    public void setRank(Integer rank) {
        this.rank = rank;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", gender=" + gender +
                ", age=" + age +
                ", mathScore=" + mathScore +
                ", chnScore=" + chnScore +
                ", engScore=" + engScore +
                ", totalScore=" + totalScore +
                ", rank=" + rank +
                '}';
    }
}

3.mainproject包

package ljt.client.mainproject;

import ljt.client.controller.ClientController;
import ljt.client.util.ClientOperation;

import java.lang.reflect.InvocationTargetException;
import java.util.Scanner;

public class ClientMain {
    private static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        ClientController controller = new ClientController();

        Class<ClientController> cls = ClientController.class;

        controller.login();

        int choose = 0;

        while (true) {
            System.out.println("用户您好，骚磊学生系统");
            System.out.println("1. 查看所有学生");
            System.out.println("2. 查看指定学生");
            System.out.println("3. 增加学生信息");
            System.out.println("4. 修改指定学生");
            System.out.println("5. 删除指定学生");
            System.out.println("6. 指定信息排序");
            System.out.println("7. 指定信息筛选");
            System.out.println("8. 退出");

            choose = sc.nextInt();

            ClientOperation[] values = ClientOperation.values();

            for (ClientOperation value : values) {
                if (choose == value.getId()) {
                    cls.getMethod(value.getMethodName()).invoke(controller);
                    break;
                }
            }
        }
    }
}

4.service包

package ljt.client.service;

import ljt.client.entity.Student;
import ljt.client.util.JsonUtil;

import java.util.List;
import java.util.Scanner;

public class ClientService {
    private static Scanner sc = new Scanner(System.in);

    public String getStudent() {
        System.out.println("请输入学生的姓名:");
        String name = sc.nextLine();

        System.out.println("请输入学生的年龄:");
        Integer age = sc.nextInt();

        System.out.println("请输入学生的性别 男 或者 女:");
        Boolean gender = sc.nextLine().charAt(0) != '男';

        System.out.println("请输入学生的语文成绩:");
        Integer chnScore = sc.nextInt();

        System.out.println("请输入学生的数学成绩:");
        Integer mathScore = sc.nextInt();

        System.out.println("请输入学生的英语成绩:");
        Integer engScore = sc.nextInt();

        Integer totalScore = chnScore + mathScore + engScore;

        Student student = new Student(0, name, gender, age, mathScore, chnScore, engScore, totalScore, 0);

        return JsonUtil.studentToJson(student);
    }

    public void showStudentList(String jsonString) {
        List<Student> students = JsonUtil.jsonToStudentList(jsonString);

        for (Student student : students) {
            System.out.println(student);
        }
    }

    public void showStudent(String jsonString) {
        Student student = JsonUtil.jsonToStudent(jsonString);
        System.out.println(student);
    }

    public String modifyStudent(String jsonString) {
        Student student = JsonUtil.jsonToStudent(jsonString);
        int choose = 0;
        boolean flag = false;

        while (true) {
            System.out.println("ID: " + student.getId() + " Name: " + student.getName());
            System.out.println("Age: " + student.getAge() + " Gender: " + (student.getGender() ? "女" : "男"));
            System.out.println("chnScore: " + student.getChnScore() + " mathScore: " + student.getMathScore());
            System.out.println("engScore: " + student.getEngScore() + " TotalScore: " + student.getTotalScore());
            System.out.println("Rank: " + student.getRank());

            System.out.println("1. 修改学生姓名:");
            System.out.println("2. 修改学生年龄:");
            System.out.println("3. 修改学生性别:");
            System.out.println("4. 修改学生语文成绩:");
            System.out.println("5. 修改学生数学成绩:");
            System.out.println("6. 修改学生英语成绩:");
            System.out.println("7. 退出");

            choose = sc.nextInt();
            sc.nextLine();

            switch (choose) {
                case 1:
                    System.out.println("请输入学生的名字:");
                    String name = sc.nextLine();

                    student.setName(name);
                    break;
                case 2:
                    System.out.println("请输入学生的年龄:");
                    Integer age = sc.nextInt();

                    student.setAge(age);
                    break;
                case 3:
                    System.out.println("请输入学生的性别 男 或者 女:");
                    Boolean gender = sc.nextLine().charAt(0) != '男';

                    student.setGender(gender);
                    break;
                case 4:
                    System.out.println("请输入学生的语文成绩:");
                    Integer chnScore = sc.nextInt();

                    student.setTotalScore(student.getTotalScore() + chnScore - student.getChnScore());
                    student.setChnScore(chnScore);
                    break;
                case 5:
                    System.out.println("请输入学生的数学成绩:");
                    Integer mathScore = sc.nextInt();

                    student.setTotalScore(student.getTotalScore() + mathScore - student.getMathScore());
                    student.setMathScore(mathScore);
                    break;
                case 6:
                    System.out.println("请输入学生的英语成绩:");
                    Integer engScore = sc.nextInt();

                    student.setTotalScore(student.getTotalScore() + engScore - student.getEngScore());
                    student.setEngScore(engScore);
                    break;
                case 7:
                    flag = true;
                    break;
                default:
                    System.out.println("选择错误");
                    break;
            }
            if (flag) {
                break;
            }
        }

        return JsonUtil.studentToJson(student);
    }

    public Integer getStringId() {
        System.out.println("请输入学生ID号:");
        return sc.nextInt();
    }

    public boolean confirm() {
        System.out.println("确认当前操作吗? Y or N");
        return "Y".equalsIgnoreCase(sc.next());
    }

    public Integer sortChoose() {
        System.out.println("1. 年龄升序");
        System.out.println("2. 年龄降序");
        System.out.println("3. 数学成绩降序");
        System.out.println("4. 数学成绩升序");
        System.out.println("5. 语文成绩降序");
        System.out.println("6. 语文成绩升序");
        System.out.println("7. 英语成绩降序");
        System.out.println("8. 英语成绩升序");
        System.out.println("9. 总成绩降序");
        System.out.println("10. 总成绩升序");
        System.out.println("11. 排序取消");

        int choose = sc.nextInt();

        return Math.min(choose, 11);
    }

    public String ageFilter() {
        System.out.println("请输入需要展示年龄的范围 最小值和最大值");
        int min = sc.nextInt();
        int max = sc.nextInt();

        if (min > max) {
            return max + "," + min;
        } else {
            return min + "," + max;
        }
    }

    public String loginMessage() {
        System.out.println("欢迎来到涛涛学生系统:");
        System.out.println("请输入用户名:");
        String userName = sc.next();

        System.out.println("请输入密码:");
        String password = sc.next();

        return userName + ":" + password;
    }
}

5.tcp包

package ljt.client.tcp;

import ljt.client.util.CloseUtil;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;

public class ClientTcp {

    private SocketChannel socket = null;

    private static String host = "192.168.1.101";

    private static int port = 8848;

    public ClientTcp() {
        try {
            socket = SocketChannel.open();
            socket.configureBlocking(false);
            InetSocketAddress address = new InetSocketAddress(host, port);

            if (!socket.connect(address)) {
                while (!socket.finishConnect()) {
                    Thread.sleep(2000);
                }
            }
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }


    public String receiveMessage() {

        int length = -1;
        String str = null;

        ByteBuffer buffer = ByteBuffer.allocate(1024);
        try {
            StringBuilder stb = new StringBuilder();

            while ((length = socket.read(buffer)) == 0) {}

            stb.append(new String(buffer.array(), 0, length));

            while ((length = socket.read(buffer)) > 0) {
                stb.append(new String(buffer.array()), 0, length);
            }

            str = stb.toString();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return str;
    }
    public void sendMessage(String message) {
        ByteBuffer buffer = ByteBuffer.wrap(message.getBytes());


        try {
            socket.write(buffer);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if ("close".equals(message)) {
                CloseUtil.closrAll(socket);
            }
        }
    }
}

util包先不放了