同步阻塞通信-BIO编程

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同步阻塞通信模型是传统一请求一应答，即开启一个ServerSocket负责监听socket的连接。
服务器实现

package com.haidong.bio;import java.net.ServerSocket;import java.net.Socket;/** * TimeServer * * @author Lance * @date 2017/05/31 */public class TimeServer {    public static void main(String[] args) throws Exception {        int port = 8080;        if(args.length > 0 && args != null){            try {                port = Integer.valueOf(port);            } catch (NumberFormatException e) {                //采用默认值                e.printStackTrace();            }        }        ServerSocket server = null;        try {            server = new ServerSocket(port);            System.out.println("时间服务器开启：" + port);            Socket socket = null;            while (true){                //监听                socket = server.accept();                new Thread(new TimeServerHandler(socket)).start();            }        } finally {            if(server != null){                System.out.println("关闭服务器");                server.close();                server = null;            }        }    }}

3.业务处理线程

package com.haidong.bio;import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;import java.util.Date;/** * TimeServerHandler * * @author Lance * @date 2017/05/31 */public class TimeServerHandler implements Runnable {    private Socket socket;    public TimeServerHandler(Socket socket) {        this.socket = socket;    }    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 currentTime = null;            String body = null;            while (true){                //读取                body = in.readLine();                if (body == null){                    break;                }                System.out.println("服务器接收到客户端内容：" + body);                currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body) ? new Date(System.currentTimeMillis()).toString() : "BAD ORDER";                out.println(currentTime);            }        } catch (IOException e) {            e.printStackTrace();            if(in != null){                try {                    in.close();                } catch (IOException e1) {                    e1.printStackTrace();                }                in = null;            }            if(out != null){                out.close();                out = null;            }            if(this.socket != null){                try {                    socket.close();                } catch (IOException e1) {                    e1.printStackTrace();                }                socket = null;            }        }    }}

4.客户端实现

package com.haidong.bio;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;/** * TimeClient * * @author Lance * @date 2017/05/31 */public class TimeClient {    public static void main(String[] args) {        int port = 8080;        if(args.length > 0 && args != null){            try {                port = Integer.valueOf(port);            } finally {                //默认值            }        }        Socket socket = null;        BufferedReader in = null;        PrintWriter out = null;        try {            socket = new Socket("127.0.0.1", port);            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));            out = new PrintWriter(socket.getOutputStream(), true);            out.println("QUERY TIME ORDER");            System.out.println("查询时间success");            String resp = in.readLine();            System.out.println("当前时间" + resp);        } catch (IOException e) {            e.printStackTrace();        } finally {          if(out != null){              out.close();              out = null;          }          if(in != null){              try {                  in.close();              } catch (IOException e) {                  e.printStackTrace();              }              in = null;          }          if(socket != null){              try {                  socket.close();              } catch (IOException e) {                  e.printStackTrace();              }              socket = null;          }        }    }}

5.运行服务端和客户端结果
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