user93796 user93796 - 4 years ago 298
Java Question

WARNING: No mapping found for HTTP request with URI [ ] in DispatcherServlet with name

I have my web.xml as

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>


applicationContext as

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"
>

<context:component-scan base-package="com.mindedges" />


</beans>


Dispatcher servlet as

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>

<!--
Most controllers will use the ControllerClassNameHandlerMapping above, but
for the index controller we are using ParameterizableViewController, so we must
define an explicit mapping for it.
-->
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
</bean>

<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />

<!--
The index controller.
-->
<bean name="indexController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />

</beans>


Controller as in package com.mindedges.testapp

@Controller
@RequestMapping("/sample")
public class SampleController {

public String sample(Model model){
return "sample.jsp";
}
}


When i hit
http://localhost:8084/TestApp/sample
.


WARNING: No mapping found for HTTP request with URI [/TestApp/sample] in DispatcherServlet with name


Also when spring starts I don't see handlers for Testapp/sample loaded

I guess my component scan is not working.Why so? any other reason

EDIT:
dispatcher-context is

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans "
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
">

<context:component-scan base-package="com.mindedges" />

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>

<!--
Most controllers will use the ControllerClassNameHandlerMapping above, but
for the index controller we are using ParameterizableViewController, so we must
define an explicit mapping for it.
-->
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
</bean>

<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />

<!--
The index controller.
-->
<bean name="indexController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />

</beans>

Answer Source

Return the name of the view without the .jsp file extension. The resolution of the view name is handled by the InternalResourceViewResolver.

public String sample(Model model){
    return "sample";
}

This snippet of your configuration:

<bean id="viewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:prefix="/WEB-INF/jsp/"
      p:suffix=".jsp" />

takes the view name sample and applies the appropriate prefix (/WEB-INF/jsp/) and suffix (.jsp) to form the entire view name used for resolution of the view.

Also make sure the sample.jsp is located at /WEB-INF/jsp/sample.jsp.

Also when using the @RequestMapping annotation you must enable these annotations in the configuration for the dispatcher serlvet by including <mvc:annotation-driven/>.

You must also add component scanning within the dispatcher configuration so that the controllers are registered with the dispatcher servlet. Currently, you perform component scanning within the applicationContext.xml configuration file using:

<context:component-scan base-package="com.mindedges" />

However, since this component scanning occurs within the applicationContext file the registered beans (assuming they are your controllers) will not be available to the dispatcher serlvet. You must place this configuration snippet within dispatcher-context.xml.

You many want to consult one of my previous answers regarding the differences between the dispatcher configuration and the context configuration.

There was also some whitespace in your dispatcher-context.xml file and a the mvc namespace was missing. I have corrected these issues and provided them in this GitHub Gist.

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