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：