服务器未使用套接字编程在 java 中发送响应

Question

当我从客户端向服务器发送一些数据时，服务器没有给我响应。当我输入所有数据直到性别时，光标在那里闪烁。它似乎希望用户插入更多数据。它正在接受与我插入的数据一样多的数据。我在下面提供了我的所有代码

我的客户端代码是

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;

public class Client {
    public static void main(String[] args) throws IOException {
        int age,carPrice,temp,temp1;
        String gender, s_temp;
        Scanner sc = new Scanner(System.in);
        Socket socket = new Socket("127.0.0.1",1342);
        Scanner sc1 = new Scanner(socket.getInputStream());
        PrintStream p = new PrintStream(socket.getOutputStream(), true);
        
        System.out.println("Enter Your Age: ");
        age = sc.nextInt();
        p.println(age);
        
        System.out.println("Enter the Cost of Vehicle: ");
        carPrice = sc.nextInt();
        p.println(carPrice);
        
        System.out.println("Enter Your Gender: ");
        gender = sc.next();
        p.println(gender);
        p.flush();
        
        temp = sc1.nextInt();
        System.out.println(temp);
        
        s_temp = sc1.next();
        System.out.println("The Gender is: " + s_temp);
        
        temp1 = sc1.nextInt();
        System.out.println(temp1);
      
        socket.close();
    }
}

我的服务器端代码：

public class Server {
    public static void main(String args[]) throws IOException, SQLException{
        ServerSocket ssocket = null;
        Socket socket = null;
        System.out.println("Server Listening.......*");
        ssocket=new ServerSocket(1342);
        while(true){
            try{
                socket = ssocket.accept();
                System.out.println("Connection Established.");
                ServerThread st = new ServerThread(socket);
                st.start();
            }
            catch(Exception e){
                System.out.println("Connection Error....");
            }
        }
    } 
}

class ServerThread extends Thread{
    Socket s1 =null;   
    Scanner sc = null;
    PrintStream p=null;
  
    int age,carPrice,temp;
    String gender,temp1;
    
    public ServerThread(Socket s){
        s1=s;
    }
    
    public void run(){
        try{
            sc = new Scanner(s1.getInputStream());
            p = new PrintStream(s1.getOutputStream(),true);
           
            age = sc.nextInt();
            gender = sc.next();
            carPrice = sc.nextInt();
            
            p.println(age*2);
            p.println(carPrice);
            p.println("Your gender is: " +gender);
            
            s1.close();
            System.out.println("Connection Closed....");
        }
        catch(Exception e){
        }
    }  
}

告诉我为什么我的服务器没有发送响应。更正它以便它可以向客户端发送响应。

Answer 1

年龄、汽车价格和性别输入，发送订单时未阅读。必须按顺序从客户端读取。

更改以下代码段。此外，添加 sc.nextLine() 以在 int 读取后跳过换行符。

服务器

age = sc.nextInt();
carPrice = sc.nextInt();
sc.nextLine();  // skip newline
gender = sc.next();

...而不是

age = sc.nextInt();
gender = sc.next();
carPrice = sc.nextInt();

在客户端，读取顺序与发送顺序不匹配。还有sc.next()读了一个字，但是你在发性的同时发了很多字。所以你必须用 sc.nextLine()

改变方法

客户

temp = sc1.nextInt();
System.out.println(temp);

temp1 = sc1.nextInt();
System.out.println(temp1);

sc1.nextLine();  // skip newline

s_temp = sc1.nextLine();
System.out.println("The Gender is: " + s_temp);

.. 而不是

temp = sc1.nextInt();
System.out.println(temp);
        
s_temp = sc1.next();
System.out.println("The Gender is: " + s_temp);
        
temp1 = sc1.nextInt();
System.out.println(temp1);

服务器未使用套接字编程在 java 中发送响应

Server is not sending the response in java using socket programming

java

sockets

client-server