Spring MVC BeanNameUrlHandlerMapping example

最新推荐文章于 2024-07-25 08:33:13 发布

gmemai

最新推荐文章于 2024-07-25 08:33:13 发布

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本文详细介绍了SpringMVC中BeanNameUrlHandlerMapping的工作原理及其配置方式。通过具体的示例说明了如何将URL请求映射到控制器Bean上，并解释了其支持的Ant风格正则表达式匹配。

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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“.

Note
Additionally, this mapping is support Ant style regex pattern match.

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>