使用ByteBuddy定义具有泛型类型的字段

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.DynamicType;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.FieldAccessor;
import net.bytebuddy.matcher.ElementMatchers;

import java.lang.reflect.Field;

public class GenericFieldExample {
    public static void main(String[] args) throws Exception {
        // 使用ByteBuddy定义一个类
        DynamicType.Unloaded<?> dynamicType = new ByteBuddy()
                .subclass(Object.class)
                .defineField("genericField", String.class)
                .make();

        // 加载并实例化定义的类
        Class<?> loadedClass = dynamicType
                .load(GenericFieldExample.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)
                .getLoaded();
        Object instance = loadedClass.getDeclaredConstructor().newInstance();

        // 使用反射获取并修改字段的值
        Field field = loadedClass.getDeclaredField("genericField");
        field.setAccessible(true);
        field.set(instance, "Hello, ByteBuddy!");

        // 输出字段的值
        System.out.println(field.get(instance));
    }
}