HTTP Status 500 – Internal Server Error

还就没写java了，对错误也生疏了

错误如下

主要看这一行：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping': Initialization of bean failed; nested exception is java.lang.IllegalStateException: Cannot map handler 'regController' to URL path [/index.html]: There is already handler of type [class controller.loginController] mapped.
意思是：/index.html 在regController和loginController的requestMapping中重复出现了，系统不知道应该用哪个，即使代码都一样

所以删除一个就好啦