本文实例讲述了Java使用TCP套接字实现多人聊天功能。分享给大家供大家参考，具体如下：
废话不多说，直接开搞：
先创建一个服务端：
package interWebWriterEven2;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
/**
* 服务端
* @author
*
*/
public class ServiceT {
static ArrayList<Socket> list = new ArrayList<Socket>();
public static void main(String[] args) {
ServerSocket server;
try {
server = new ServerSocket(9999);
while(true){
Socket socket = server.accept();
System.out.println(socket.getInetAddress().getHostName()+"连接成功。IP："+socket.getInetAddress().getHostAddress());
list.add(socket);
ServiceThreadT t =new ServiceThreadT(socket);
t.start();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
接着是服务端的线程：
package interWebWriterEven2;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
/**
* 服务端线程
* @author
*
*/
public class ServiceThreadT extends Thread{
private Socket socket;
public Socket getSocket() {
return socket;
}
public void setSocket(Socket socket) {
this.socket = socket;
}
public ServiceThreadT(Socket socket) {
super();
this.socket = socket;
}
@Override
public void run() {
try {
@SuppressWarnings("resource")
BufferedWriter wFile = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("D://messagesT.txt",true)));
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String strOut = "";
String strIn = "";
while(true){
strIn = socket.getInetAddress().getHostName()+":"+br.readLine();
strOut = strIn;
wFile.write(strIn);
wFile.newLine();
wFile.flush();
for (Socket soc : ServiceT.list) {
if(soc != socket){
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(soc.getOutputStream()));
bw.write(strOut);
System.out.println(strOut);
bw.newLine();
bw.flush();
}
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
然后是客户端（应用端）：
package interWebWriterEven2;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Socket;
/**
* 客户端
* @author
*
*/
public class ClientT {
public static void main(String[] args) {
try {
Socket socket = new Socket("127.0.0.1",9999);
ClientThreadT t = new ClientThreadT(socket);
t.start();
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String strIn = "";
while(true){
strIn = br.readLine();
System.out.println(strIn);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
最后是客户端的线程：
package interWebWriterEven2;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.util.Scanner;
/**
* 客户端的线程
* @author
*
*/
public class ClientThreadT extends Thread{
private Socket socket;
public Socket getSocket() {
return socket;
}
public void setSocket(Socket socket) {
this.socket = socket;
}
public ClientThreadT(Socket socket) {
super();
this.socket = socket;
}
@Override
public void run() {
@SuppressWarnings("resource")
Scanner sc = new Scanner(System.in);
try {
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
while(true){
System.out.println();
bw.write(sc.nextLine().trim());
bw.newLine();
bw.flush();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
先运行服务端哦，否则将会报空指针异常的。
更多关于java相关内容感兴趣的读者可查看本站专题：《Java Socket编程技巧总结》、《Java文件与目录操作技巧汇总》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
