Class loader, encryption

Classloaderattachment.java

public class Classloaderattachment extends Date {public String toString () {
return "Hello,itcast";
}

}

Myclassloader.java

public class Myclassloader extends classloader{

/**
* @param args
*/
public static void Main (string[] args) throws Exception {
TODO auto-generated Method Stub
String Srcpath = args[0];
String destdir = args[1];
FileInputStream fis = new FileInputStream (Srcpath);
String destfilename = srcpath.substring (srcpath.lastindexof (' \ ') +1);
String DestPath = destdir + "\" + destfilename;
FileOutputStream fos = new FileOutputStream (destpath);
Cypher (Fis,fos);
Fis.close ();
Fos.close ();
}

private static void Cypher (InputStream IPs, OutputStream Ops) throws exception{
int b =-1;
while ((B=ips.read ())!=-1) {
Ops.write (b ^ 0xff);
}
}

Private String Classdir;

@Override
Protected class<?> Findclass (String name) throws ClassNotFoundException {
TODO auto-generated Method Stub
String classfilename = classdir + "\" + name.substring (Name.lastindexof ('. ') +1) + ". Class";
try {
FileInputStream fis = new FileInputStream (classfilename);
Bytearrayoutputstream BOS = new Bytearrayoutputstream ();
Cypher (Fis,bos);
Fis.close ();
System.out.println ("AAA");
byte[] bytes = Bos.tobytearray ();
Return defineclass (bytes, 0, bytes.length);
catch (Exception e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
return null;
}

Public Myclassloader () {

}

Public Myclassloader (String classdir) {
This.classdir = Classdir;
}
}

Classloadertest.java

public class Classloadertest {

/**
* @param args
*/
public static void Main (string[] args) throws Exception {
TODO auto-generated Method Stub
System.out.println (
ClassLoaderTest.class.getClassLoader (). GetClass (). GetName ()
);
System.out.println (
System.class.getClassLoader ()
);
SYSTEM.OUT.PRINTLN ("xxx");
ClassLoader loader = ClassLoaderTest.class.getClassLoader ();
while (loader!= null) {
System.out.println (Loader.getclass (). GetName ());
Loader = Loader.getparent ();
}
SYSTEM.OUT.PRINTLN (loader);

System.out.println (New Classloaderattachment (). toString ());
System.out.println ("xxx2");
Class clazz = new Myclassloader ("Itcastlib"). LoadClass ("Cn.itcast.day2.ClassLoaderAttachment");
Date D1 = (date) clazz.newinstance ();
System.out.println (D1);
}

}