Spring: servlet-mapping -> url-pattern : /* working but can't display

Question

web.xml

<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/webmvc-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

<welcome-file-list>
    <welcome-file>/</welcome-file>
</welcome-file-list>

/WEB-INF/spring/webmvc-config.xml

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="mediaTypes">
        <map>
            <entry key="atom" value="application/atom+xml" />
            <entry key="html" value="text/html" />
            <entry key="json" value="application/json" />
        </map>
    </property>
    <property name="viewResolvers">
        <list>
            <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
            <bean
                class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                <property name="prefix" value="/WEB-INF/views/" />
                <property name="suffix" value=".jsp" />
            </bean>
        </list>
    </property>
    <property name="defaultViews">
        <list>
            <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
        </list>
    </property>
</bean>

Controller

@Controller
@RequestMapping ( "/" )
public class IndexController extends BaseController
{
    @RequestMapping ( "/" )
    public String index ( Model model ){
        System.out.println("AA");
        return index2(model);
    }

    @RequestMapping ( "/index" )
    public String index2 ( Model model ){
        System.out.println("BB");
        return "index";
    }
}

And exist index.jsp File

enter image description here

I guess that is very good working

BBBBBBBBBBBUUUUUUUUUTTTTTTTTT, BUT!

enter image description here

WHY???? WHY???? WHY???? WHY????

And More strange

enter image description here

??????????????????????????????????????????????????????????????????

Controller work it!! but don't display browser

What's going on?

Please help me.

And Log

DispatcherServlet with name 'dispatcher' processing GET request for [/WEB-INF/views/index.jsp]

No mapping found for HTTP request with URI [/WEB-INF/views/index.jsp] in DispatcherServlet with name 'dispatcher'

You should enable Spring logging, you should notice it log that it can't find a handler for `/WEB-INF/views/index.jsp`. — Sotirios Delimanolis, Aug 28 '14 at 15:22
look at log. definitely must try to find the [/WEB-INF/views/index.jsp]. DispatcherServlet with name 'dispatcher' processing GET request for [/WEB-INF/views/index.jsp] No mapping found for HTTP request with URI [/WEB-INF/views/index.jsp] in DispatcherServlet with name 'dispatcher' — Jeong SangCheol, Aug 28 '14 at 15:31
use servlet path "/", "/series/{id}", "/episode/{id}", "/user/{id}", but i don't want use multi servlet mapping. should never use only one Servlet mapping? — Jeong SangCheol, Aug 28 '14 at 15:41
Following link is also useful for this query : https://stackoverflow.com/questions/4140448/difference-between-and-in-servlet-mapping-url-pattern/4140659#4140659 — S. Shinde, Sep 17 '16 at 18:32

score 12 · Answer 1 · edited Nov 21 '17 at 15:47

Servlet containers have rules for how they map and handle URI requests. These can be found in the Servlet Specification. It's also important to note that most Servlet containers have a Servlet to handle JSPs, mapped to *.jsp, which is an extension mapping. Tomcat has a JspServlet to do this.

You've mapped your DispatcherServlet to

<url-pattern>/*</url-pattern>

which is a path mapping. Path mappings take precedence over extension mappings. So when you submit your view name

return "index";

Spring will use the ViewResolver

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/" />
    <property name="suffix" value=".jsp" />
</bean>

to resolve a path to use with a RequestDispatcher's forward method. That path will be /WEB-INF/views/index.jsp. Now the Servlet container will receive that path and attempt to find a Servlet to handle it. Since you have a Servlet mapped to /* it will use it, but your DispatcherServlet doesn't have a mapping for that path and therefore responds with a 404.

The simple solution is to change your mapping to /, which is the default handler if no other matches are found. In this case, when you submit your view and the container must find a mapped Servlet, it will find the JspServlet and use it.

he is also mapping /index with "index" which is legal but strange — mahery rafara, Aug 28 '14 at 16:13

Spring: servlet-mapping -> url-pattern : /* working but can't display

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