Getting “WARN org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI …” when trying to setup spring servlet

Question

I am trying to setup a Spring MVC project. I have added a dispatcher servlet, a jsp and setup the web.xml file. But I keep getting

WARN org.springframew

Answer 1

I got that error when i migrated/updated from Spring framework 3.X to 4.X and using json (through Jackson2) as returned object and got the error above.

To solve that you should add

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="messageConverters">
        <list>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8"/>
            </bean>
        </list>
    </property>
</bean>

<bean  class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
    <property name="mediaTypes">
        <map>
           <entry key="json" value="application/json"/>
       </map>
    </property>
</bean>

<bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
    <property name="contentType" value="application/json"/>
</bean>

To XXX-servlet.xml file

And on the code you should use MappingJackson2JsonView as return value for example :

@RequestMapping("/user")
MappingJackson2JsonView user() {
MappingJackson2JsonView view = new MappingJackson2JsonView();
view.setExtractValueFromSingleKeyModel(true);
view.addStaticAttribute("user", new User("Sébastien", "Deleuze"));
view.setPrefixJson(true);
return view;
}

for more examples look here: http://www.programcreek.com/java-api-examples/index.php?api=org.springframework.web.servlet.view.json.MappingJackson2JsonView

Answer 2

I had a similar issue before which was very confusing, after a series of tests, I found it's the url-pattern for the DispatcherServlet. Be cautious when you use the asterisk for wildcard match which might lead to unexpected behavior, and it's just safe to start from root "/" or your custom servlet context path "/foo/"

Try the following.

<servlet-mapping>
  <servlet-name>HelloWeb</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

Answer 3

You seem to be missing the <mvc:annotation-driven />

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

    <!-- Enables the Spring MVC @Controller programming model -->
    <mvc:annotation-driven />

    <context:component-scan base-package="org.activiti.explorer.controller" />

    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass"
                  value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

note that I've removed the version from the xsd files, this means that it will use the schema from your jar files (and there will be a validation error in case of incompatibilty)

after @Nikolay's comment, I've also noticed an error in your mapping (note that you still need the annotation-driven element), you should either change the mapping in your controller to

@RequestMapping("/hello.jsp")

and access it via

/safesite/hello.jsp

OR, more common, change the servlet mapping to

<servlet-mapping>
    <servlet-name>HelloWeb</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

and access as Nikolay said so /safesite/hello