在Spring app中使用ByteBuddy更改带注释的类的包

<dependency>
    <groupId>net.bytebuddy</groupId>
    <artifactId>byte-buddy</artifactId>
    <version>1.11.18</version>
</dependency>

import net.bytebuddy.agent.builder.AgentBuilder;
import net.bytebuddy.asm.Advice;

public class PackageTransformer implements AgentBuilder.Transformer {
    private final String newPackage;

    public PackageTransformer(String newPackage) {
        this.newPackage = newPackage;
    }

    @Override
    public DynamicType.Builder<?> transform(DynamicType.Builder<?> builder, TypeDescription typeDescription,
                                            ClassLoader classLoader, JavaModule module) {
        return builder.visit(Advice.to(PackageAdvice.class).on(ElementMatchers.isAnnotatedWith(Annotation.class)));
    }

    @Advice.OnMethodExit
    public static void changePackage(@Advice.This Object instance) {
        Class<?> clazz = instance.getClass();
        Package currentPackage = clazz.getPackage();
        String currentPackageName = currentPackage.getName();
        if (currentPackageName.startsWith("com.example")) {
            String newPackageName = currentPackageName.replace("com.example", "com.newexample");
            try {
                ClassLoader classLoader = clazz.getClassLoader();
                Class<?> newClass = classLoader.loadClass(newPackageName);
                Object newObject = newClass.newInstance();
                // Replace the original object with the new one
                // ...
            } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) {
                e.printStackTrace();
            }
        }
    }
}

import net.bytebuddy.agent.ByteBuddyAgent;
import net.bytebuddy.agent.builder.AgentBuilder;

public class Application {
    public static void main(String[] args) {
        String newPackage = "com.newexample";
        ByteBuddyAgent.install();
        new AgentBuilder.Default()
            .type(ElementMatchers.isAnnotatedWith(Annotation.class))
            .transform(new PackageTransformer(newPackage))
            .installOnByteBuddyAgent();
        // Start your Spring application
        // ...
    }
}