java的Socket短连接-优快云博客

本文介绍了一个简单的 Java Socket 应用程序实例，包括服务端和客户端的实现方式。服务端监听指定端口，接收客户端发送的消息并打印出来。客户端连接到服务端，并发送一条消息。

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写了个socket小程序, 先放在这以后来改进

看到一个很好的例子:http://cuisuqiang.iteye.com/blog/1489661

1.服务端

package Socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

	ServerSocket ss = null;
	
	public Server(int port) throws IOException
	{
		ss = new ServerSocket(port);
	}
	
	public void listen()
	{
		Socket socket = null; //短连接 , 用完就关闭 所以不放在类的属性里
		
		while(true)
		{
			try {
				socket = ss.accept();
				//System.out.println(socket.hashCode()); //验证socket被子类关闭
				new Thread(new ServerImpl(socket)).start();
				
			} catch (IOException e) {
				e.printStackTrace();
			}
		}	
	}
	
	class ServerImpl implements Runnable
	{
		Socket client = null;
		
		public ServerImpl(Socket client)
		{
			this.client = client;
		}
		
		public synchronized void run()
		{
			try {
				DataInputStream dis = new DataInputStream(client.getInputStream());
				DataOutputStream dos = new DataOutputStream(client.getOutputStream());
				
				String rcv = dis.readUTF();//对应writeUTF() ,避免乱码
				
				System.out.println(rcv);
				
			} catch (IOException e) {
				e.printStackTrace();
			}finally{
				
				if(client != null)
				{
					try {
						//System.out.println(client.hashCode());//验证关闭父类socket
						client.close(); //关闭socket, 子类的client指向父类传来的socket
						
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			} 
			
		}
		
	}
	
	
	public static void main(String[] args) throws IOException {
		
		Server server = new Server(8888);
		
		server.listen();
	}

}

2.客户端

package Socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {

	Socket socket = null;

	public static void main(String[] args) throws IOException {
		
		Client c =new Client();
		
		try {
			
			c.socket = new Socket("127.0.0.1",8888);
			
			DataInputStream dis = new DataInputStream(c.socket.getInputStream());
			DataOutputStream dos = new DataOutputStream(c.socket.getOutputStream());
			
			String str = "java-Socket 套接字";
			dos.writeUTF(str);
			
			
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {	
			e.printStackTrace();
		}finally{
			
			if(c.socket != null)
			{
				c.socket.close();
			}
			
		}
		
		
		
	}

}