Spring MVC BeanNameUrlHandlerMapping example

In Spring MVC, BeanNameUrlHandlerMapping is the default handler mapping mechanism, which maps URL requests to the name of the beans. For example,

<beans ...>

   <bean
	class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

   <bean name="/welcome.htm"
        class="com.mkyong.common.controller.WelcomeController" />

   <bean name="/streetName.htm"
        class="com.mkyong.common.controller.StreetNameController" />

   <bean name="/process*.htm"
        class="com.mkyong.common.controller.ProcessController" />

</beans>

In above example, If URI pattern

• /welcome.htm is requested, DispatcherServlet will forward the request to the “WelcomeController“.
• /streetName.htm is requested, DispatcherServlet will forward the request to the “StreetNameController“.
• /processCreditCard.htm or /process{any thing}.htm is requested, DispatcherServlet will forward the request to the “ProcessController“.

Actually, declare BeanNameUrlHandlerMapping is optional, by default, if Spring can’t found handler mapping, the DispatcherServlet will creates a BeanNameUrlHandlerMapping automatically.

So, the above web.xml file is equivalence to the following web.xml:

<beans ...>

   <bean name="/welcome.htm"
            class="com.mkyong.common.controller.WelcomeController" />

   <bean name="/streetName.htm"
            class="com.mkyong.common.controller.StreetNameController" />

   <bean name="/process*.htm"
            class="com.mkyong.common.controller.ProcessController" />

</beans>