使用Byte Buddy在Spring Boot启动中添加Bean

<dependency>
    <groupId>net.bytebuddy</groupId>
    <artifactId>byte-buddy</artifactId>
    <version>1.11.13</version>
</dependency>

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.MethodDelegation;
import net.bytebuddy.matcher.ElementMatchers;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ByteBuddyConfig {
    
    @Bean
    public Object customBean() throws IllegalAccessException, InstantiationException {
        Class<?> dynamicType = new ByteBuddy()
                .subclass(Object.class)
                .method(ElementMatchers.named("toString"))
                .intercept(MethodDelegation.to(MyInterceptor.class))
                .make()
                .load(getClass().getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)
                .getLoaded();

        return dynamicType.newInstance();
    }
    
    public static class MyInterceptor {
        public static String toString() {
            return "Customized toString()";
        }
    }
}

@SpringBootApplication
@Import(ByteBuddyConfig.class)
public class MyApp {
    public static void main(String[] args) {
        SpringApplication.run(MyApp.class, args);
    }
}