Java基于Socket的简单多线程服务模式

Java基于Socket的简单多线程服务模式

以一个简单的服务器为例，读取客户端数据并且原封不动返回给客户端，再在客户端进行输出，并且这个服务器是基于多线程的，可以为每个连接进来的客户端进行进行服务。

服务端代码：

public class EchoServer {
	
	static ExecutorService pool = Executors.newCachedThreadPool();
	
	static class HandleMsg implements Runnable {
		Socket client;
		
		public HandleMsg(Socket client) {
				this.client = client;
		}

		@Override
		public void run() {
			BufferedReader bufferedReader = null;
			PrintWriter printWriter = null;
			
			try {
				bufferedReader=new BufferedReader(new InputStreamReader(client.getInputStream()));
				printWriter = new PrintWriter(client.getOutputStream(),true);
				String inputline = null;
				while((inputline=bufferedReader.readLine())!=null) {
						printWriter.println(inputline);
					
				}
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
                try {
                    if(bufferedReader!=null)bufferedReader.close();
                    if(printWriter!=null)printWriter.close();
                    client.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
			
		}
	}
	
	public static void main(String[] args) throws IOException {
			ServerSocket echoServer = null;
			Socket client = null;
			echoServer = new ServerSocket(4490);
			System.out.println("EchoServer.main()");
			while (true) {
				client=echoServer.accept();
				System.out.println("connect");
				pool.execute(new HandleMsg(client));
				
			}
			
			
	}

}

客户端代码：

public class EchoClient  {

	public static void main(String[] args) throws IOException  {
			Socket client = null;
			BufferedReader bufferedReader = null;
			PrintWriter printWriter = null;
			client = new Socket();
			try {
				client.connect(new InetSocketAddress("localhost", 7788));
				printWriter=new PrintWriter(client.getOutputStream(),true);
				printWriter.println("hello");
				printWriter.flush();
				bufferedReader=new BufferedReader(new InputStreamReader(client.getInputStream()));
				
				System.out.println(bufferedReader.readLine());
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally {
	            if (printWriter != null)
	                printWriter.close();
	            if (bufferedReader != null)
					try {
						bufferedReader.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
	            if (client != null)
	                client.close();
	        }
	}

}