The difference between blocking/and intercepting/* in spring

In spring MVC-based application, you need to add the following configuration information in Web. XML:

<!--Spring MVC Servlet ---<servlet>  <servlet-name>Servletname</servlet-name>  <servlet-class>    Org.springframework.web.servlet.DispatcherServlet  </servlet-class>  <load-on-startup>1</load-on-startup></servlet><servlet-mapping>  <servlet-name>Servletname</servlet-name>    <url-pattern>/</url-pattern> </servlet-mapping>

the special emphasis here is <url-pattern>/</url-pattern> is used/, instead of/*, if/ * is used, Then the request can be forwarded to the appropriate action or controller through Dispatcherservlet, but the returned content, such as the returned JSP will also be intercepted again, resulting in a 404 error, that is, access to the JSP. So if you find that there are always 404 errors, don't forget to check if <url-pattern>/</url-pattern> 's configuration is/*.

The difference between blocking/and intercepting/* in spring