多线程TCP的socket通信

应用多线程来实现服务器与多客户端之间的通信。

基本步骤：

1.服务器端创建ServerSocket，循环调用accept()等待客户端的连接

2.客户端创建一个socket并请求和服务器端的连接

3.服务器端接收客户端的请求，创建socket与该客户端建立专线连接

4.建立连接的两个socket在一个单独的线程上对话

5.服务器端继续等待新的客户端的连接

Server.java

public class Server {

public static void main(String[] args) throws IOException{

//1、创建一个服务器端的socket，指定绑定的端口，并侦听此端口

ServerSocket server = new ServerSocket(8888);

System.out.println("********服务端即将启动，等待客户端的连接********");

int count = 0;

//2、开始侦听，等待客户端的连接

while(true){

Socket socket = server.accept();

ServerThread thread = new ServerThread(socket);

thread.start();

count++;

System.out.println("客户端的数量："+count);

InetAddress address = socket.getInetAddress();

System.out.println("客户端的ip："+address.getHostAddress());

}

ServerThread.java

public class ServerThread extends Thread {

//和本线程相关的socket

Socket socket = null;

public ServerThread(Socket socket){

this.socket = socket;

}

//线程执行操作，响应客户端的请求

public void run(){

InputStream is = null;

InputStreamReader isr = null;

BufferedReader br = null;

OutputStream os = null;

PrintWriter pw = null;

try {

//3、获取输入流，用来读取客户端发送的信息

is = socket.getInputStream();//字节输入流

isr = new InputStreamReader(is);//字符输入流

br = new BufferedReader(isr);//缓冲输入流

String info = null;

while((info=br.readLine()) != null){

//循环读取数据

System.out.println("客户端说："+info);

}

socket.shutdownInput();//关闭输入流

os = socket.getOutputStream();//字节输出流

pw = new PrintWriter(os);//打印输出流

pw.write("服务器端已接受你的请求，允许登录");

pw.flush();

socket.shutdownOutput();

} catch (IOException e) {

e.printStackTrace();

} finally{

try {

//4、关闭资源

if(pw != null)

pw.close();

if(os != null)

os.close();

if(br != null)

br.close();

if(isr != null)

isr.close();

if(is != null)

is.close();

if(socket != null)

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

Client.java

public class Client {

public static void main(String[] args) throws UnknownHostException, IOException{

//1、创建客户端socket,指定服务器地址和端口

Socket socket = new Socket("127.0.0.1",8888);

System.out.println("******客户端已准备就绪*******");

//2、给服务端发送数据

OutputStream os = socket.getOutputStream();//字节流

PrintWriter pw = new PrintWriter(os);//打印流

pw.write("用户名：admin;密码：123456");

pw.flush();

socket.shutdownOutput();//关闭输出流

InputStream is = socket.getInputStream();//字节输入流

InputStreamReader isr = new InputStreamReader(is);//字符输入流

BufferedReader br = new BufferedReader(isr);//缓冲输入流