为什么Sturt2报错后更改继承ActionSupport后问题解决,然后去掉继承ActionSupport之后又没错了?
用表单提交数据后,程序报There is no Action mapped for namespace [/] and action name [login] associated with context path [/Homework]. - [unknown location]错后,网上查了说要继承ActionSupport,继承之后就不报错了,后来我故意不让继承之后也不报错,为什么啊?