public class MyClassLoader extends ClassLoader {
/**
* @param args
*/
private native void encrypt();
public byte[] bytes;
public String classDir;
private String LocalName;
private boolean Flag(FileInputStream fis, ByteArrayOutputStream bos) throws Exception{
boolean Result = false;
if(fis.read()==0xCA)Result=true;
return Result;
}
@SuppressWarnings("deprecation")
@Override
protected Class<?> findClass(String arg0) throws ClassNotFoundException {
String name;
if(LocalName!=null)
name=LocalName;
else
name=arg0;
System.out.println("on my Findclass way");
String ClassName = name.substring(name.lastIndexOf('.')+1) + ".class";
String classFileName = System.getProperty("user.dir")+"\\cn\\drawingbox\\" + ClassName;
try {
FileInputStream fis = new FileInputStream(classFileName);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
fis.close();
//这里调用JNI函数进行解码
//System.getProperties().setProperties(String key,String value)
//System.setProperties(arg0);
System.load(classDir+"\\encrypt_main.dll");
// System.loadLibrary("encrypt_main");
MyClassLoader encypt_function= new MyClassLoader();
encypt_function.classDir=classDir;
encypt_function.bytes = bos.toByteArray();
encypt_function.encrypt();
///////
LocalName=null;
return defineClass(encypt_function.bytes, 0, encypt_function.bytes.length);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
// TODO Auto-generated method stub
boolean Result = false;
String ClassName = name.substring(name.lastIndexOf('.')+1) + ".class";
if(ClassName.equals("Foo.class")||ClassName.equals("bar.class")){
String classFileName = classDir + "\\" + ClassName;
try {
FileInputStream fis = new FileInputStream(classFileName);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
Result = Flag(fis, bos);
fis.close();
bos.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// TODO Auto-generated method stub
if(Result==true)
{
LocalName=name;
return super.loadClass("ThisIsJoy");
}
else
{
LocalName=null;
return super.loadClass(name);
}
}
else
return super.loadClass(name);
}
