第四次过程性考核

Posted 2021-01-27 ccyan

码云地址：https://gitee.com/c_cy/four

使用套接写连接编写一个简单的聊天室程序，客户端主函数放在Client_Main.java文件中，服务器端主函数放在Server_Main.java文件中 

 

要求： 

 

• 1.客户端从控制台进行输入，并将自己的输出内容和时间保存到数据库的“client_学号”表中
• 2.服务器端读取到客户端的程序后，从控制台进行输入给客户端以回应，并将客户端的输入内容与服务端的输出内容、时间保存到数据库的表中
• 3.要求服务器端可以实现同时与多个客户端进行通信，与每一个客户端通信的内容，保存为一个"ip_学号"的表
• 4.提交文件结果包括：代码，数据库导出为.sql文件

//服务器端
import java.net.*;
import java.util.*;
import java.sql.*;
public class Server_Main {
    public static void main(String[] args) {
        /*Connection con=null;
        Statement sql;
        ResultSet rs;
        con =GetDBConnection.connectDB("students","root","111111");
        if (con==null)return;*/
        Scanner scanner=new Scanner(System.in);
        Thread readData;　　//
        ReceiveLetterForClient receiver=new ReceiveLetterForClient();
        try{
            readData =new Thread(receiver);
            readData.start();
            byte [] buffer=new byte[1];
            InetAddress address=InetAddress.getByName("127.0.0.1");
            DatagramPacket dataPack=new DatagramPacket(buffer,buffer.length,address,888);
            DatagramSocket postman=new DatagramSocket();
            System.out.print("请输入给客户端发送到消息：");
            while(scanner.hasNext()){
                String mess=scanner.nextLine();
                buffer =mess.getBytes();
                /*String jilu="(mess,null)";
                String sqlStr="insert into mess values"+jilu;*/
                if(mess.length()==0)
                    System.exit(0);
                buffer =mess.getBytes();
                dataPack.setData(buffer);
                postman.send(dataPack);
                System.out.print("继续输入发给客户端的消息：");
            }
        }
        catch(Exception e){
            System.out.println("客户端已断开"+e);
        }
        /*try{
            sql=con.createStatement();
            int ok=sql.executeUpdate(sqlStr);
            rs=sql.executeQuery("select * from client_学号");
            while(rs.next()){
                String mess=rs.getString(1);
                String time=rs.getString(2);
                System.out.print(mess);
                System.out.print(time);
            }
            con.close();    
        }
        catch(SQLException e){
            System.out.println(e);
        }*/
    }

}

 

import java.net.*;
public class ReceiveLetterForServer implements Runnable{
    public void run(){
        DatagramPacket pack=null;
        DatagramSocket postman=null;
        byte data[]=new byte[8192];
        try{
            pack=new DatagramPacket(data,data.length);
            postman=new DatagramSocket(888);
        }
        catch(Exception e){}
        while(true){
            if(postman==null)
                break;
            else{
                try{
                    postman.receive(pack);
                    String message=new String(pack.getData(),0,pack.getLength());
                    System.out.printf("%25s
","收到："+message);
                }
                catch(Exception e){}
            }
        }
    }
}

//客户端
import java.net.*;
import java.util.*;
public class Client_Main {
    public static void main(String[] args) {
        /*Connection con=null;
        Statement sql;
        ResultSet rs;
        con =GetDBConnection.connectDB("students","root","111111");
        if (con==null)return;*/
        Scanner scanner=new Scanner(System.in);
        Thread readData;
        ReceiveLetterForServer receiver=new ReceiveLetterForServer();
        try{
            readData =new Thread(receiver);
            readData.start();
            byte [] buffer=new byte[1];
            InetAddress address=InetAddress.getByName("127.0.0.1");
            DatagramPacket dataPack=new DatagramPacket(buffer,buffer.length,address,666);
            DatagramSocket postman=new DatagramSocket();
            System.out.print("请输入给服务器发送到消息：");
            while(scanner.hasNext()){
                String mess=scanner.nextLine();
                buffer =mess.getBytes();
                /*String jilu="(mess,null)";
                String sqlStr="insert into mess values"+jilu;*/
                if(mess.length()==0)
                    System.exit(0);
                buffer =mess.getBytes();
                dataPack.setData(buffer);
                postman.send(dataPack);
                System.out.print("继续输入发给服务器的消息:");
            }
        }
        catch(Exception e){
            System.out.println("服务器已断开"+e);
        }
        /*try{
            sql=con.createStatement();
            int ok=sql.executeUpdate(sqlStr);
            rs=sql.executeQuery("select * from client_学号");
            while(rs.next()){
                String mess=rs.getString(1);
                String time=rs.getString(2);
                System.out.print(mess);
                System.out.print(time);
            }
            con.close();    
        }
        catch(SQLException e){
            System.out.println(e);
        }*/
    }

}

import java.net.*;
public class ReceiveLetterForClient implements Runnable{
    public void run(){
        DatagramPacket pack=null;
        DatagramSocket postman=null;
        byte data[]=new byte[8192];
        try{
            pack=new DatagramPacket(data,data.length);
            postman=new DatagramSocket(666);
        }
        catch(Exception e){}
        while(true){
            if(postman==null)
                break;
            else{
                try{
                    postman.receive(pack);
                    String message=new String(pack.getData(),0,pack.getLength());
                    System.out.printf("%25s
","收到："+message);
                }
                catch(Exception e){}
            }
        }
    }
}

import java.sql.*;
public class GetDBConnection{
    public static Connection connectDB(String DBName,String id,String p){
        Connection con=null;
        String uri="jdbc:mysql://localhost:3306/"+DBName+"?useSSL=true&characterEncoding=utf-8";
        try{
            Class.forName("");
        }
        catch(Exception e){}
        try{
            con=DriverManager.getConnection(uri,id,p);
        }
        catch(SQLException e){}
        return con;
    }

}

建SQL表

 

 

 总结：

实现了服务器与客户端之间的通信，代码中大块的注释是用来实现将通信的内容存入数据库的，但没有成功所以注释掉了

这次的考核主要是线程和数据库，我觉得分开时编程没有太大的困难，但当这两个合在一起时，出现了问题，我没有解决，

可能是因为学的不够扎实，理解的还不透彻！