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伪异步IO

概念

客户端：

 1 package bhz.bio2;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 import java.io.PrintWriter;
 7 import java.net.Socket;
 8 import java.net.UnknownHostException;
 9 
10 public class Client {
11     
12     final static String ADDRESS = "127.0.0.1";
13     final static int PORT =8765;
14     
15     public static void main(String[] args) {
16         Socket socket = null;
17         BufferedReader in = null;
18         PrintWriter out = null;
19         try {
20             socket = new Socket(ADDRESS, PORT);
21             in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
22             out = new PrintWriter(socket.getOutputStream(), true);
23             
24             out.println("Client request");
25             
26             String response = in.readLine();
27             System.out.println("Client:" + response);
28             
29             
30         }  catch (Exception e) {
31             // TODO Auto-generated catch block
32             e.printStackTrace();
33         } finally {
34             if(in != null){
35                 try {
36                     in.close();
37                 } catch (Exception e1) {
38                     e1.printStackTrace();
39                 }
40             }
41             if(out != null){
42                 try {
43                     out.close();
44                 } catch (Exception e2) {
45                     e2.printStackTrace();
46                 }
47             }
48             if(socket != null){
49                 try {
50                     socket.close();
51                 } catch (Exception e3) {
52                     e3.printStackTrace();
53                 }
54             }
55             socket = null;                
56         }
57         
58         
59         
60     }
61 
62 }

package bhz.bio2;

import java.io.BufferedReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    final static int PORT = 8765;

    public static void main(String[] args) {
        ServerSocket server = null;
        BufferedReader in = null;
        PrintWriter out = null;
        try {
            server = new ServerSocket(PORT);
            System.out.println("server start");
            Socket socket = null;
            HandlerExecutorPool executorPool = new HandlerExecutorPool(50, 1000);
            while(true){
                socket = server.accept();
                executorPool.execute(new ServerHandler(socket));
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(in != null){
                try {
                    in.close();
                } catch (Exception e1) {
                    e1.printStackTrace();
                }
            }
            if(out != null){
                try {
                    out.close();
                } catch (Exception e2) {
                    e2.printStackTrace();
                }
            }
            if(server != null){
                try {
                    server.close();
                } catch (Exception e3) {
                    e3.printStackTrace();
                }
            }
            server = null;                
        }
        
    
    
    }
    
    
}

线程池：

package bhz.bio2;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class HandlerExecutorPool {

    private ExecutorService executor;
    public HandlerExecutorPool(int maxPoolSize, int queueSize){
        this.executor = new ThreadPoolExecutor(
                Runtime.getRuntime().availableProcessors(),
                maxPoolSize, 
                120L, 
                TimeUnit.SECONDS,
                new ArrayBlockingQueue<Runnable>(queueSize));
    }
    
    public void execute(Runnable task){
        this.executor.execute(task);
    }
    
    
    
}

package bhz.bio2;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class ServerHandler implements Runnable {

    private Socket socket;
    public ServerHandler (Socket socket){
        this.socket = socket;
    }
    
    @Override
    public void run() {
        BufferedReader in = null;
        PrintWriter out = null;
        try {
            in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
            out = new PrintWriter(this.socket.getOutputStream(), true);
            String body = null;
            while(true){
                body = in.readLine();
                if(body == null) break;
                System.out.println("Server:" + body);
                out.println("Server response");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(in != null){
                try {
                    in.close();
                } catch (Exception e1) {
                    e1.printStackTrace();
                }
            }
            if(out != null){
                try {
                    out.close();
                } catch (Exception e2) {
                    e2.printStackTrace();
                }
            }
            if(socket != null){
                try {
                    socket.close();
                } catch (Exception e3) {
                    e3.printStackTrace();
                }
            }
            socket = null;            
        }
        
        
    }

}

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原文地址：https://www.cnblogs.com/duan2/p/8638423.html