错误信息：
java.lang.IllegalStateException: Ambiguous mapping. Cannot map ‘userController’ method
public java.lang.String org.lv.controller.UserController.loginForm(java.lang.String,org.springframework.ui.Model)
to {[/{formName}]}: There is already ‘sessionController’ bean method
public java.lang.String org.lv.controller.SessionController.SessionLoginForm(java.lang.String,java.lang.String,org.springframework.ui.Model,javax.servlet.http.HttpServletRequest) mapped.
解决办法：
在springmvc中不能同时映射一个名字（@RequestMapping（”/*“））