Class Test can not access a member of class User with modifiers “private“

报错内容：
Exception in thread “main” java.lang.IllegalAccessException: Class Test can not access a member of class com.jas.cn.entity.User with modifiers “private”
问题出现：
今天在使用Java反射去访问Java类属性的时候报错Class Test can not access a member of class User with modifiers “private” 不能使用修饰符“private”访问类User的成员
解决办法：
类属性加上 field.setAccessible(true);
代码示例：

private static void test() throws NoSuchFieldException, IllegalAccessException, InstantiationException {User user = new User();Field id = user.getClass().getDeclaredField("id");id.setAccessible(true);//默认是false 删除这行或者设置为false可以复现问题id.set(user, 1);System.out.println(user.getId());Field email = user.getClass().getDeclaredField("email");email.setAccessible(true);email.set(user, "111@qq.com");System.out.println(user.getEmail());
}

错误复现：
删除【field.setAccessible(true);】这行或者设置为false可以复现问题

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