【求助】自己编写的MyClassLoader 运行错误，求解！！ - 黑马程序员技术交流社区

<p>import java.util.*;
public class ClassLoaderTest {
public static void main(String[] args)throws Exception{
Class clazz = new MyClassLoader("itcastlib").loadClass("ClassLoaderAttachment");
Date d1 = (Date)clazz.newInstance();
System.out.println(d1);
}
}
import java.io.*;
public class MyClassLoader extends ClassLoader {
public static void main(String[] args)throws Exception {
String srcPath1 = args[0];
String srcPath2= args[1];
String destdir= args[2];
String srcPath = srcPath1+' '+srcPath2;
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 is,OutputStream os)throws Exception{
int b = -1;
while((b=is.read())!=-1){
os.write(b^0xff);
}
}
private String classDir;
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
String classFileName = classDir + "\\" + name + ".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) {
e.printStackTrace();
}
return null;
}
public MyClassLoader(){
}
public MyClassLoader(String classDir){
this.classDir = classDir;
}
}

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