No mapping found for HTTP request with URI [/springmvc02/user/testString] in DispatcherServlet wit

No mapping found for HTTP request with URI [/springmvc02/user/testString] in DispatcherServlet with name ‘dispatcherServlet’ 错误

当用idea springmvc框架写web项目时，跳转页面报此错误：

在配置文件没有写错的情况下，
可以检查按照下面方法看能否解决
点击 run->debug->edit configurations->defauls->tomcat server->local->Deployment->点击+，如下图
然后点击apply