获取在表达式中使用的泛型类型的属性类型

import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public class GenericTypeExample<T> {
    private T genericField;

    public static void main(String[] args) throws NoSuchFieldException {
        GenericTypeExample<String> example = new GenericTypeExample<>();

        // 获取泛型类型的属性类型
        Class<?> fieldType = example.getGenericTypePropertyType("genericField");
        System.out.println("属性类型: " + fieldType.getName());
    }

    public Class<?> getGenericTypePropertyType(String propertyName) throws NoSuchFieldException {
        Field field = getClass().getDeclaredField(propertyName);
        Type genericType = field.getGenericType();

        if (genericType instanceof ParameterizedType) {
            ParameterizedType parameterizedType = (ParameterizedType) genericType;
            Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();

            if (actualTypeArguments.length > 0) {
                Type actualType = actualTypeArguments[0];
                if (actualType instanceof Class) {
                    return (Class<?>) actualType;
                }
            }
        }

        return null;
    }
}