SimpleClassFileTransformer

gistfile1.txt

package com.dlmu.agent.server;

import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.security.ProtectionDomain;

/**
 * Created by fupan on 16-4-9.
 */
public class SimpleClassFileTransformer implements ClassFileTransformer {
    @Override
    public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
        System.out.println("啊哈.");
        return classfileBuffer;
    }
}