socket服务器接收GPRS的问题

[qq_23359651]

各位大神看到的帮帮忙我正在做一个接收GPRS数据的中间件，用Java socket做的服务端来接收通过GPRS传过来的数据，我把那个服务端在阿里云上面运行，接收不到GPRS传过来的数据，然后自己在阿里云上做了个socket客户端往这个服务端上传，这样服务端能接收到这个客户端传过来的数据，可是接收不到GPRS传过来的数据，各位能帮忙看看是哪的问题，不胜感激呀

package com.ldu.middle;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class UDPServer implements Runnable{
	static int servPort = 2020;
	private DatagramPacket data=null;
	public UDPServer(DatagramPacket data){
		this.data=data;
	}

	@Override
	public void run() {
		//System.out.println("received Data: "+new String(data.getData(),0,data.getLength()));
		System.out.println("received Data: "+data.getData());
		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
	
	public static void openServer() throws SocketException{
		DatagramSocket server=new DatagramSocket(servPort);
		ExecutorService service=Executors.newFixedThreadPool(3);//线程池
		byte[] bytes=new byte[1024];
		DatagramPacket data=new DatagramPacket(bytes, bytes.length);
		try {
			System.out.println("listening Port...");
			server.receive(data);
			System.out.println("receive data...");
			System.out.println("data = "+data.getData());
		} catch (IOException e) {
			e.printStackTrace();
		}
		service.execute(new UDPServer(data));
		server.close();
		System.out.println("close!!!");
	}
	
	public static void main(String[] args) throws SocketException {
		System.out.println("open...");
		openServer();
		System.out.println("close!!!");
	}

}

[qq_23359651]

现在我想先写个能收到数据的服务端就行，就只先看看数据

[qq_23359651]

我明白问题出在哪了，来个人结贴给分啦

[墨竹*]