java使用抓包获得应用发送的对外的请求

java使用jpcap抓包工具获得本机发送的所有tcp请求，根据tcp请求的内容可以调试某个应用启动后对外发送的相关http请求或者sql连接请求，这样可以很好的调试我们的程序。很不错的一种应用无侵入性的调试本机发送的http接口，sql连接接口等。

import java.io.UnsupportedEncodingException;
import java.net.InetAddress;

import jpcap.*;
import jpcap.packet.EthernetPacket;
import jpcap.packet.Packet;
import jpcap.packet.TCPPacket;

class Tcpdump implements PacketReceiver {
	public void receivePacket(Packet packet) {
//		System.out.println(packet);

		if (packet instanceof TCPPacket) {
			TCPPacket tcpPacket = (TCPPacket) packet;
			if(tcpPacket.src_ip.getHostAddress().equals(getIp())){
				EthernetPacket ethernetPacket = (EthernetPacket) packet.datalink;
				System.out.print("源IP：" + tcpPacket.src_ip + "  目的IP："
						+ tcpPacket.dst_ip + "发送端口：" + tcpPacket.src_port
						+ " 接收端口：" + tcpPacket.dst_port + "\n");
				System.out
						.print("源MAC：" + ethernetPacket.getSourceAddress()
								+ " 目的MAC："
								+ ethernetPacket.getDestinationAddress() + "\n");
				System.out.print("协议：" + tcpPacket.protocol + "\n");
				System.out.print("数据：\n");
				try {
					System.out.println(new String(tcpPacket.data,"utf-8"));
				} catch (UnsupportedEncodingException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
//				for (int i = 0; i < tcpPacket.data.length; i++)
//					System.out.print((char) tcpPacket.data[i]);	
			}
		}

	}
	
	public static String getIp(){
    	InetAddress inet = null;
		try {
			inet = InetAddress.getLocalHost();
	    	String ip = inet.getHostAddress();  //在某些linux机器上取到的ip是host绑定的本机ip，即127.0.0.1
	    	return ip;
		}catch(Exception e){
			
		}
		return null;
	}
}<span style="white-space: normal; background-color: #ffffff;"> </span>

 

我先启动给一个查询数据库的一个应用，然后再启动下面的程序，

输出结果如下：