本文实例为大家分享了java实现TCP聊天程序的具体代码，供大家参考，具体内容如下
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服务端代码：
package com.test.server;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) {
new Server().startServer();
}
public void startServer(){
try {
//服务器在9990端口监听客户端的连接
ServerSocket ss = new ServerSocket(9999);
System.out.println("server is listening...");
while(true){
//阻塞的accept方法，当一个客户端连接上，才会返回Socket对象
Socket s = ss.accept();
System.out.println("a client has connected!");
//开启线程处理通信
new CommunicateThread(s).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
public class CommunicateThread extends Thread{
Socket socket;
DataInputStream dis;
DataOutputStream dos;
public CommunicateThread(Socket socket){
this.socket = socket;
try {
dis = new DataInputStream(socket.getInputStream());
dos = new DataOutputStream(socket.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
super.run();
//读取客户端发过来的消息
String msg = null;
try {
while((msg = dis.readUTF()) != null){
System.out.println("client send msg ：" + msg);
String replyMsg = "server reply ： " + msg;
dos.writeUTF(replyMsg);
System.out.println("server reply msg ：" + replyMsg);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}客户端代码：
package com.test.client;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;
public class Client {
public static void main(String[] args) {
new Client().startClient();
}
public void startClient(){
try {
//连接到服务器
Socket socket = new Socket("localhost", 9999);
DataInputStream dis = new DataInputStream(socket.getInputStream());
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
Scanner scanner = new Scanner(System.in);
String line = null;
listenServerReply(dis);
while((line = scanner.nextLine()) != null){//读取从键盘输入的一行
dos.writeUTF(line);//发给服务端
System.out.println("client send msg : " + line);
}
} catch (Exception e) {
e.printStackTrace();
}
}
//监听服务端回复的消息
public void listenServerReply(final DataInputStream dis){
new Thread(){
@Override
public void run() {
super.run();
String line = null;
try {
while((line = dis.readUTF()) != null){
System.out.println("client receive msg from server: " + line);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
}先启动服务端，再启动客户端，在客户端的控制台输入消息并回车，就可以发送消息给客户端了，客户端收到消息后，马上会回复一个消息
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
