JAVA socket收发数据，并支持断网自动连接

package socketdemo; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; import java.net.UnknownHostException; public class SocketClient { public SocketListen socketListen=new SocketListen(); public Socket socket=null; public InputStream is=null; public OutputStream netOut=null; public DataOutputStream doc=null; DataInputStream in =null; public void Subscribe(){ while(true){ try{ if(socket==null){ socket = SocketListen.socket; }else{ try{ is=socket.getInputStream(); netOut = socket.getOutputStream(); doc = new DataOutputStream(netOut); in = new DataInputStream(is); doc.writeUTF("客户端数据"); String res = in.readUTF(); System.out.println("收到服务器端数据:"+res); }catch(Exception ex){ System.out.println("链接异常..."); (new Thread()).sleep(1000); socket = SocketListen.socket; } } }catch(Exception ex){ ex.printStackTrace(); } } } public static void main(String[] args) { SocketListen socketListen=new SocketListen(); socketListen.start(); SocketClient socketClient=new SocketClient(); socketClient.Subscribe(); } }