网路类装载器客户端

来源：互联网发布：lua node 编辑：程序博客网时间：2024/05/24 06:13

网路类装载器客户端

import java.util.*;
import java.io.*;
import java.net.*;
import java.util.regex.*;

// Client
public class ClassLoaderTest extends ClassLoader
{
private String IPAddr = null;
private int port;

public ClassLoaderTest( String ip , int port )
{
  ip = ip.trim();
  Pattern ptn = Pattern.compile("//d+.//d+.//d+.//d+");   //Regular Expression
  Matcher mtc = ptn.matcher(ip);
  if( !mtc.matches() || port > 65535 || port <= 0)
  {
   throw new IllegalArgumentException("Argument Error!");
  }

  IPAddr = ip;
  this.port = port;

}

protected Class findClass( String Name ) throws ClassNotFoundException
{
  try
  {
   Socket sock = new Socket( IPAddr , port );
   InputStream sin = sock.getInputStream();
   BufferedInputStream bin = new BufferedInputStream( sin );
   ByteArrayOutputStream baout = new ByteArrayOutputStream();

   int b;
   while( (b=bin.read()) != -1 )
   {
    baout.write(b);
   }

   byte[] bts = baout.toByteArray();

   bin.close();
   baout.close();

   return defineClass( Name , bts , 0 , bts.length );
  }
  catch(Exception e )
  {
   return null;
  }
}

public static void main(String [] args)throws Exception
{
  ClassLoaderTest ldr = new ClassLoaderTest("162.105.81.165",80);
  Class cls = ldr.loadClass("ClassFilter");
  System.out.println(cls.getName());
  System.out.println(cls.getClassLoader().getClass().getName());
}

}