报错_NoSuchMethodException: cn.mvc.entity.User.＜init＞()

org.springframework.beans.BeanInstantiationException: Failed to instantiate [cn.mvc.entity.User]: No default constructor found; nested exception is java.lang.NoSuchMethodException: cn.mvc.entity.User.<init>()

添加一个无参的构造器即可！ 

    public User() {}