java Socket 长连接 心跳包 客户端 信息收发 demo

import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;/**  * @author 某家:  * @version 创建时间：2015年8月17日 下午3:04:14  * 类说明  */public class Connect {    private static final ThreadLocal<Socket> threadConnect = new ThreadLocal<Socket>();         private static final String HOST = "192.168.1.120";    private static final int PORT = 8888;        private static Socket client;        private static OutputStream outStr = null;        private static InputStream inStr = null;        private static Thread tRecv = new Thread(new RecvThread());    private static Thread tKeep = new Thread(new KeepThread());    public static void connect() throws UnknownHostException, IOException  {        client = threadConnect.get();        if(client == null){            client = new Socket(HOST, PORT);            threadConnect.set(client);            tKeep.start();            System.out.println("========链接开始！========");        }        outStr = client.getOutputStream();        inStr = client.getInputStream();    }        public static void disconnect() {        try {            outStr.close();            inStr.close();            client.close();        } catch (IOException e) {            e.printStackTrace();        }    }    private static class KeepThread implements Runnable {        public void run() {            try {                System.out.println("=====================开始发送心跳包==============");                while (true) {                    try {                        Thread.sleep(1000);                    } catch (InterruptedException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                    System.out.println("发送心跳数据包");                    outStr.write("send heart beat data package !".getBytes());                }            } catch (IOException e) {                e.printStackTrace();            }        }    }        private static class RecvThread implements Runnable {        public void run() {            try {                System.out.println("==============开始接收数据===============");                while (true) {                    byte[] b = new byte[1024];                    int r = inStr.read(b);                    if(r>-1){                        String str = new String(b);                        System.out.println( str );                    }                }            } catch (IOException e) {                e.printStackTrace();            }        }    }        public static void main(String[] args) {        try {            Connect.connect();            tRecv.start();        } catch (UnknownHostException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}