Question

我有一个非常奇怪的问题，如果我从服务器/客户端向服务器/客户端发送消息，他们将不会在控制台中发送。我已经尝试了整整一天来修复它并在之前用谷歌搜索它，但我无法找到问题的答案，这就是我在这里问的原因。

My Code:

Serversocket:
package me.jackboyplay.sockets_server;

import java.io.IOException;
import java.net.ServerSocket;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author JackboyPlay
 */
public class Server {

    public static void main(String[] args) {
        ServerSocket socket = null;
        try {
            socket = new ServerSocket(1243);
            System.out.println("Gestartet...");
        } catch (IOException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        }
        if(socket == null){
            System.out.println("NULL -> Aus");
            return;
        }
        while(true){
            try {
                new Clients(socket.accept()).start();
            } catch (IOException ex) {
                Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

}

    package me.jackboyplay.sockets_server;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author JackboyPlay
 */
public class Clients extends Thread{

    Socket socket;
    DataInputStream dis;
    PrintStream dos;

    public Clients(Socket socket){
        this.socket = socket;
        try {
            dis = new DataInputStream(socket.getInputStream());
            dos = new PrintStream(socket.getOutputStream());
        } catch (IOException ex) {
            Logger.getLogger(Clients.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    @Override
    public void run(){
        System.out.println("Thread started...");
        String receive = null;
        while(true){
            try {
                receive = dis.readLine();
            } catch (IOException ex) {
                Logger.getLogger(Clients.class.getName()).log(Level.SEVERE, null, ex);
            }
            if(receive != null){
                System.out.println(receive);
                dos.println("Out");
                dos.flush();
            }
        }
    }

}
Client:

    package me.jackboyplay.sockets_client;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author JackboyPlay
 */
public class Client {

    public static void main(String[] args) throws IOException {
        Socket socket = null;
        try {
            socket = new Socket("localhost", 1243);
        } catch (IOException ex) {
            Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
        }
        if(socket == null){
            return;
        }
        DataInputStream dis = null;
        PrintWriter dos = null;
        try {
            dis = new DataInputStream(socket.getInputStream());
            dos = new PrintWriter(socket.getOutputStream());
        } catch (IOException ex) {
            Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
        }
        String receive = null;
        while(true){
            Scanner s = new Scanner(System.in);
            try {
                receive = dis.readLine();
            } catch (IOException ex) {
                Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
            }
            if(receive != null){
                dos.println("Hallo");
                dos.flush();
                try {
                    receive = dis.readLine();
                } catch (IOException ex) {
                    Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
                }
                System.out.println(receive);
            }
        }
    }

}

Answer 1

两端从套接字接收开始。你陷入僵局。重新考虑您的申请协议

发送和接收时出现Java Socket错误

1 个答案: