java初入多线程19

基于Socket的服务端多线程模式

public class HeavySocketClient {

    private static ExecutorService  tp =Executors.newCachedThreadPool();
    
    private static final int sleep_time =1000 * 1000 * 1000 ;
    
    public static class EchoClient implements Runnable{
        @Override
        public void run() {
            Socket client =null ;
            PrintWriter writer = null ;
            BufferedReader reader = null ;
            
            try {
                client =new Socket ();
                client.connect(new InetSocketAddress("localhost", 8000));
                writer = new PrintWriter(client.getOutputStream() , true );
                writer.print("H");
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                
                LockSupport.parkNanos(sleep_time);
                writer.println("e");
                writer.flush();
                
                reader =new BufferedReader(new InputStreamReader(client.getInputStream()));
                System.out.println("from server : " +reader.readLine());
                
            } catch (Exception e) {
                e.printStackTrace();
            }       
        }
    }   
}

public class MultiThreadEchoServer {

    private static ExecutorService tp =Executors.newCachedThreadPool();
    
    static class HandleMsg implements Runnable{

        Socket clienSocket ;
        
        
        public HandleMsg(Socket clienSocket) {
            super();
            this.clienSocket = clienSocket;
        }


        @Override
        public void run() {
            BufferedReader is = null ;
            PrintWriter os = null ;
            try {
                is = new BufferedReader( new InputStreamReader(clienSocket.getInputStream()));
                os =new PrintWriter(clienSocket.getOutputStream(),true);
                
                String inputLine = null;
                long b =System.currentTimeMillis() ;
                
                while ((inputLine = is.readLine()) != null){
                    os.println(inputLine);
                }
                long e =System.currentTimeMillis() ;
                System.out.println("spend:"+ (e - b) + "ms");
            } catch (Exception e) {
                e.printStackTrace();
            }finally {
                try {
                    if(is != null){
                        is.close();
                    }
                    if(os != null){
                        os.close();
                    }
                    clienSocket.close();
                } catch (Exception e2) {
                    e2.printStackTrace();
                }
            }
        }
    }
    
    public static void main(String[] args) {
        ServerSocket echoServer = null ;
        Socket clientSocket = null ;
        try {
            echoServer =new ServerSocket(8000);
        } catch (Exception e) {
            System.out.println(e);
        }
        
        while(true){
            try {
                clientSocket = echoServer.accept() ;
                System.out.println(clientSocket.getRemoteSocketAddress() + " connect !");
                tp.execute(new HandleMsg(clientSocket));
                
            } catch (Exception e) {
                System.out.println(e);
            }
        }
    }
    
}

• 客户端与服务端的代码实现 ，在客户端，我们使用线程池实现10次请求，因为会在输出有个字符之后。进行1秒的等待。所以会延迟很长时间。