自己编写的解密类加载器

 自己编写的解密类加载器=================

package com.gaoxin;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

public class CreateClassloader extends ClassLoader{
 
 public CreateClassloader()
 {
  
 }
 
 
   public CreateClassloader(String classDir)
 {
  
  this.classDir=classDir;
  
 }

 
 public static void main(String[] args) {

      try {
 
 String strpath=args[0];
 String despath=args[1];
 FileInputStream fis=new FileInputStream(strpath);
 //FileOutputStream os=new FileOutputStream(despath);
 
 String destfileName=strpath.substring(strpath.lastIndexOf('\\')+1);
 String destpath=despath+"\\"+destfileName;
 FileOutputStream os=new FileOutputStream(destpath);
 
 System.out.println("dongligang111----"+destfileName);
 
 System.out.println("dongligan222----"+destpath);
 
 
 cyphs(fis,os);
 fis.close();
 os.close();
   
  } catch (Exception e) {
   // TODO: handle exception
   e.printStackTrace();
  }
  
 }
 
 private static void cyphs(InputStream is,OutputStream ops) throws Exception
 {
  int b=-1;
  while((b=is.read())!=-1)
  {
   ops.write(b ^0xff);
  }
  
 }
 
 private String classDir;
 @Override
 public Class<?>  findClass(String name)
 {
  
 try {
  
  String classFileName=classDir+"\\"+name.substring(name.lastIndexOf('.')+1)+".class";
  
  System.out.println("dongligang----"+classFileName);
  FileInputStream fis=new FileInputStream(classFileName);
  ByteArrayOutputStream bos=new ByteArrayOutputStream();
  cyphs(fis,bos);
  System.out.println("dddd=======");
  byte[] bytes=bos.toByteArray();
  return defineClass(bytes,0,bytes.length);
  
 } catch (Exception e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } 
 
 return null;
 }

}

============================

package com.gaoxin;

import java.util.Date;

public class ClassLoaderAttachMent extends Date {
 
 public String toString()
 {
  return "hello,dongligang";
 }

}

=========================

package com.gaoxin;

import java.util.Date;

public class TestClassloader {

 /**
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {
  // TODO Auto-generated method stub
  System.out.println(TestClassloader.class.getClassLoader().getClass().getName());
  
  ClassLoader cloader=TestClassloader.class.getClassLoader();
  
  //System.out.println(cloader.getParent());
  
  //System.out.println(System.class.getClassLoader());
  
  //System.out.println(new ClassLoaderAttachMent().toString());
  Class clazz=new CreateClassloader("dong").loadClass("ClassLoaderAttachMent");
  Date d1=(Date)clazz.newInstance();
  System.out.println(d1);
  
  
  
  
  
 }

}