About the two kinds of mapper in SPRINGMVC cannot coexist

First of all, we all know that Springmvc has two mappers:

Org.springframework.web.servlet.handler. beannameurlhandlermapping

And

Org.springframework.web.servlet.handler. simpleurlhandlermapping

And the first "name URL mapper" is used by default.

There are two types of mappers that can coexist .

But when the project was built today, when the two mappers were enabled,beannameurlhandlermapping failed.

Here is my XML configuration:

    <BeanID= "Hello"name= "/hello.action"class= "servlet." Hello "></Bean>        <BeanID= "Yaha"class= "servlet." Yaha "></Bean>        <BeanID= "Update"class= "servlet." Update "></Bean>    <Beanclass= "Org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">        < Propertyname= "Mappings">            <Props>                <propKey= "/update.action">Update</prop>                <propKey= "/yaha.action">Yaha</prop>            </Props>                </ Property>    </Bean>

Operation result :

Access to Update.action ———— Normal

Access to Yaha.action ———— Normal

Visit Hello.action ———— 404

It is obvious that the "Name URL" Mapper failed to match.

Analysis :

Failure is just the default one, and usually we use the default mapper is often not to write the mapper's <bean> declaration , and today declare a mapper, then all the mappings may be all to the declaration of the one. So the default mapper is no longer called.

Test :

Add the following declaration to the XML:

    <class= "Org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" ></ Bean >

Access to Update.action ———— Normal

Access to Yaha.action ———— Normal

Access to Hello.action ———— Normal

Conclusion :

do not forget to declare the default beannameurlhandlermapping when it is necessary to use both mappers . (It is best to declare it even if you use default only)

About the two kinds of mapper in SPRINGMVC cannot coexist