fields[j].set(obj, val);
报：
Exception in thread "main" java.lang.IllegalAccessException: Class pers.hanchao.reflect.fields.ReflectFieldDemo can not access a member of class pers.hanchao.reflect.common.User with modifiers "private" at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102) at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296) at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288) at java.lang.reflect.Field.get(Field.java:390) at
解决方案：添加一行代码：fields[j].setAccessible(true);
Java反射操作成员变量 Class can not access a member with modifiers "*"
原文：https://www.cnblogs.com/zhjh256/p/10780173.html