TCP练习2 模拟用户登陆改进（改进了用户名和密码的对象实现模拟数据库）

最新推荐文章于 2024-10-16 10:01:06 发布

原创最新推荐文章于 2024-10-16 10:01:06 发布 · 259 阅读

2 ·

CC 4.0 BY-SA版权

本文介绍了一个简单的TCP客户端和服务端实现用户登录验证的过程。服务端监听指定端口，接收客户端发送的用户名和密码，然后检查这些信息是否存在于预定义的用户列表中，并将登录结果反馈给客户端。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

服务端

package Net.TCP.Demo3;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.List;

public class ReceiveDemo {
    public static void main(String[] args) throws IOException {
        ServerSocket ss=new ServerSocket(12000);

        Socket s = ss.accept();

//        InputStream is = s.getInputStream();
        BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
        String usename=br.readLine();
        String message=br.readLine();
        System.out.println(usename);
        System.out.println(message);
        boolean flag=false;

//        if("wujinchao".equals(usename)&&"10000".equals(message)){
//            flag=true;
//        }
//        BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
        User user=new User(usename,message);
        List<User> users=UserDB.getUsers();
        if (users.contains(user)){
            flag=true;
        }
        PrintWriter pw=new PrintWriter(s.getOutputStream(),true);
        if (flag){
            pw.println("登陆成功");
        }
        else {
            pw.println("登陆失败");
        }
        s.close();
           //ss.close  //服务器一般不关闭

    }
}

客户端

package Net.TCP.Demo3;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**模拟用户登陆改进*/
public class SendDemo {
    public static void main(String[] args) throws IOException {
        Socket s=new Socket("DESKTOP-QG1LSJ2",12000);

        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.println("请输入用户名");
        String s1 = br.readLine();
        System.out.println("请输入密码");
        String s2 = br.readLine();

        PrintWriter pw=new PrintWriter(s.getOutputStream(),true);
        pw.println(s1);
        pw.println(s2);

        //
        BufferedReader chickbr=new BufferedReader(new InputStreamReader(s.getInputStream()));
        String flag=chickbr.readLine();
        System.out.println(flag);
        s.close();



    }
}

用户对象

package Net.TCP.Demo3;

public class User {
    private  String name;
    private  String messeage;

    public User() {
    }

    public User(String name, String messeage) {
        this.name = name;
        this.messeage = messeage;
    }


    public String getName() {
        return name;
    }

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

    public String getMesseage() {
        return messeage;
    }

    public void setMesseage(String messeage) {
        this.messeage = messeage;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        User user = (User) o;

        if (name != null ? !name.equals(user.name) : user.name != null) return false;
        return messeage != null ? messeage.equals(user.messeage) : user.messeage == null;
    }

}

用户对象集合

package Net.TCP.Demo3;

import java.util.ArrayList;
import java.util.List;

public class UserDB  {
    private static List<User> users=new ArrayList <>();

    static {
        users.add(new User("zhangsan","10000"));
        users.add(new User("lisi","11000"));
        users.add(new User("wangwu","12000"));
        users.add(new User("wuliu","13000"));

    }

    public static List <User> getUsers() {
        return users;
    }
}