同时收发消息

这是因为接受和发送都在主线程中，不能同时进行。 为了实现同时收发消息，基本设计思路是把收发分别放在不同的线程中进行

1. SendThread 发送消息线程
2. RecieveThread 接受消息线程
3. Server一旦接受到连接，就启动收发两个线程
4. Client 一旦建立了连接，就启动收发两个线程

• SendThread.java
• RecieveThread.java
• Server.java
• Client.java

 

 

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package socket;   import java.io.DataOutputStream; import java.io.IOException; import java.io.OutputStream; import java.net.Socket; import java.util.Scanner;   public class SendThread extends Thread{       private Socket s;       public SendThread(Socket s){         this.s = s;     }     public void run(){         try {             OutputStream os = s.getOutputStream();             DataOutputStream dos = new DataOutputStream(os);               while(true){                 Scanner sc = new Scanner(System.in);                 String str = sc.next();                 dos.writeUTF(str);             }         } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }               }       }

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package socket;   import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; import java.util.Scanner;   public class RecieveThread extends Thread {       private Socket s;       public RecieveThread(Socket s) {         this.s = s;     }       public void run() {         try {             InputStream is = s.getInputStream();               DataInputStream dis = new DataInputStream(is);             while (true) {                 String msg = dis.readUTF();                 System.out.println(msg);             }         } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }       }   }

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package socket;   import java.io.IOException; import java.net.ServerSocket; import java.net.Socket;   public class Server {       public static void main(String[] args) {         try {               ServerSocket ss = new ServerSocket(8888);               System.out.println("监听在端口号:8888");             Socket s = ss.accept();               //启动发送消息线程             new SendThread(s).start();             //启动接受消息线程             new RecieveThread(s).start();           } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }       } }

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package socket;   import java.io.IOException; import java.net.Socket; import java.net.UnknownHostException;   public class Client {       public static void main(String[] args) {           try {             Socket s = new Socket("127.0.0.1", 8888);               // 启动发送消息线程             new SendThread(s).start();             // 启动接受消息线程             new RecieveThread(s).start();           } catch (UnknownHostException e) {             // TODO Auto-generated catch block             e.printStackTrace();         } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }     } }