反射修改注解值

  try {
            //获取类
            Class<xxx> xxxClass = xxx.class;
            //获取父类
            //Class<? super xxx> superclass = xxxClass.getSuperclass();
            //拿到所有字段
            Field[] fields = xxxClass.getDeclaredFields();
            for (Field field : fields) {
                // 获取注解
                Excel excel = field.getAnnotation(Excel.class);
                String before = excel.name();
                log.info("之前的值 {}", before);
                //反射获取注解的代理对象
                InvocationHandler invocationHandler = Proxy.getInvocationHandler(excel);
                //获取代理对象的 memberValues 字段
                Field declaredField = invocationHandler.getClass().getDeclaredField("memberValues");
                //访问私有属性 (private可访问)
                declaredField.setAccessible(true);
                // 获取 memberValues
                Map memberValues = (Map) declaredField.get(invocationHandler);
                // 修改注解的值
                memberValues.put("name", "123456");
                String after = excel.name();
                log.info("之后的值 {}", after);
            }
        } catch (Exception e) {
            throw new HisignException("注解值修改失败!");
        }