应用Java多线程实现服务器端与多客户端之间的通信
应用Java多线程来实现服务器与多线程之间的通信的基本步骤
1、服务器端创建ServerSocket,循环调用accept()等待客户端链接
2、客户端创建一个Socket并请求和服务器端链接
3、服务器端接受客户端请求，创建socekt与该客户端建立专线链接
4、建立链接的socket在一个单独的线程上对话
5、服务器继续等待新的链接
服务器端Server.java
package test.concurrent.socket;
import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
/**
* Created by dong on 15-6-22.
* 基于TCP协议的Socket通信，实现用户登录
* 服务器端
*/
public class Server {
public static void main(String[] args) {
try {
//1、创建一个服务器端Socket,即ServerSocket, 指定绑定的端口，并监听此端口
ServerSocket serverSocket = new ServerSocket(8888);
Socket socket = null;
//记录客户端的数量
int count = 0;
System.out.println("***服务器即将启动，等待客户端的链接***");
//循环监听等待客户端的链接
while (true){
//调用accept()方法开始监听，等待客户端的链接
socket = serverSocket.accept();
//创建一个新的线程
ServerThread serverThread = new ServerThread(socket);
//启动线程
serverThread.start();
count++; //统计客户端的数量
System.out.println("客户端的数量: " + count);
InetAddress address = socket.getInetAddress();
System.out.println("当前客户端的IP ： " + address.getHostAddress());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
服务器端线程处理类ServerThread.java
package test.concurrent.socket;
import java.io.*;
import java.net.Socket;
/**
* Created by dong on 15-6-22.
* 服务器端线程处理类
*/
public class ServerThread extends Thread {
//和本线程相关的Socket
Socket socket = null;
public ServerThread(Socket socket){
this.socket = socket;
}
//线程执行的操作，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 {
//获取一个输入流，并读取客户端的信息
is = socket.getInputStream();
isr = new InputStreamReader(is); //将字节流转化为字符流
br = new BufferedReader(isr); //添加缓冲
String info = null;
//循环读取数据
while ((info = br.readLine()) != null){
System.out.println("我是服务器，客户端说: " +info);
}
socket.shutdownInput(); //关闭输入流
//获取输出流，响应客户端的请求
os = socket.getOutputStream();
pw = new PrintWriter(os); //包装为打印流
pw.write("欢迎你");
pw.flush(); //将缓存输出
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
//关闭资源
if (pw != null)
pw.close();
if (os != null)
os.close();
if (is != null)
is.close();
if (isr != null)
isr.close();
if (br != null)
br.close();
if (socket != null)
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
客户端Client.java
package test.concurrent.socket;
import java.io.*;
import java.net.Socket;
/**
* Created by dong on 15-6-22.
* 客户端
*/
public class Client {
public static void main(String[] args) {
try {
//1、创建客户端Socket，指定服务器端口号和地址
Socket socket = new Socket("localhost",8888);
//2、获取输出流,向服务器发送信息
OutputStream os = socket.getOutputStream(); //字节输出流
PrintWriter pw = new PrintWriter(os); //将输出流包装为打印流
pw.write("用户名:tom; 密码：456");
pw.flush();
socket.shutdownOutput(); //关闭输出流
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String info = null;
//循环读取
while ((info = br.readLine()) != null){
System.out.println("我是客户端:服务器说:" + info);
}
br.close();
is.close();
isr.close();
pw.close();
os.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}