SpringMVC: DispatcherServlet makes extra requests to view - spring

Question

I'm having a strange problem with Spring MVC. I have a simple controller like this:
#Controller
#RequestMapping("admin")
public class AdminController {
#RequestMapping(value = "", method = RequestMethod.GET)
public String home() {
return "home";
}
When I run my server and access the url: localhost/admin I get a 404 error. The view home.jsp exists and should be rendered. When I check my spring event log this is what shows up:
DEBUG: org.springframework.web.servlet.DispatcherServlet - DispatcherServlet with name 'appServlet' processing GET request for [/admin]
DEBUG: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Looking up handler method for path /admin
DEBUG: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Returning handler method [public java.lang.String be.roots.buildinginspector.web.controller.AdminController.home()]
DEBUG: org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'adminController'
DEBUG: org.springframework.web.servlet.DispatcherServlet - Last-Modified value for [/admin] is: -1
DEBUG: org.springframework.web.servlet.DispatcherServlet - Rendering view [org.springframework.web.servlet.view.JstlView: name 'home'; URL [home]] in DispatcherServlet with name 'appServlet'
DEBUG: org.springframework.web.servlet.view.JstlView - Added model object 'domainOfExpertise' of type [be.roots.buildinginspector.business.model.DomainOfExpertise] to request in view with name 'home'
DEBUG: org.springframework.web.servlet.view.JstlView - Added model object 'org.springframework.validation.BindingResult.domainOfExpertise' of type [org.springframework.validation.BeanPropertyBindingResult] to request in view with name 'home'
DEBUG: org.springframework.web.servlet.view.JstlView - Forwarding to resource [home] in InternalResourceView 'home'
DEBUG: org.springframework.web.servlet.DispatcherServlet - DispatcherServlet with name 'appServlet' processing GET request for [/home]
DEBUG: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Looking up handler method for path /home
DEBUG: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Did not find handler method for [/home]
WARN : org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/home] in DispatcherServlet with name 'appServlet'
Everything is handled correctly but instead of just showing the view, the DispatcherServlet makes a new GET request to the url of the requested view name.
My web.xml:
<?xml version="1.0" encoding="UTF-8"?>
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/spring/config-core-business.xml
classpath*:/spring/config-app-security.xml
</param-value>
</context-param>
<!-- Spring Security filter -->
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/spring/appServlet/config-core-web.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>hiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>hiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Relevant spring context parts (config-core-web.xml):
<resources mapping="/resources/**" location="../../../resources" />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/"/>
<beans:property name="suffix" value=".jsp"/>
</beans:bean>

Answer 1

#Controller
#RequestMapping("admin")
public class AdminController {
#RequestMapping(method = RequestMethod.GET)
public String home() {
return "home";
}
remove 'value' property of #RequestMapping for home() function.

Answer 2

After all it turned out this was a tomcat-related issue. For some reason when I recreated the configuration in my IDE the error was resolved. Thanks for your help.

Answer 3

I think this is servlet mapping problem in web.xml. Change it in web.xml to /admin addreses only. Perhaps now you have:
<url-pattern>*</url-pattern>
change it to:
<url-pattern>/admin/*</url-pattern>

Answer 4

The request mapping annotation defined over your methode restrict your controller to responds to requests starting with "/admin/home".
I would apply the following modifications :
#Controller
#RequestMapping("/admin")
public class AdminController {
#RequestMapping(method = RequestMethod.GET)
public String home() {
return "home";
}
}

Answer 5

Try this:
#RequestMapping(value = "admin",
method = {RequestMethod.GET, RequestMethod.POST })