SpringMVC 3 405 - Request method 'POST' not supported - spring-mvc

Question

Controller
#Controller
public class Tester {
#RequestMapping(value="testPost", method = RequestMethod.POST)
public ModelAndView testPost(){
ModelAndView _mv = new ModelAndView();
_mv.setViewName("shared/post");
return _mv;
}
}
HTML
<form action="testPost" method="post">
<input type="submit" value="Submit" />
</form>
Web.xml
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>iCubeHRS</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>site_mesh</filter-name>
<filter-class>org.sitemesh.config.ConfigurableSiteMeshFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>site_mesh</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<session-config>
<session-timeout>20</session-timeout>
</session-config>
</web-app>
Question
Once set "method" attribute to "POST", when you hit submit button, it always turn into 405 - Request method 'POST' not supported, if delete method attribute from conotroller, and delete method="post" from HTML as well, it works, anyone know how to solve this problem?
Update
I think I found the problem, this issue caused by sitemesh3, after i removed sitemesh3 features from web.xml, POST works fine, but I don't know how to solve it.

Answer 1

I am not sure if this is relevant to your setup but I had the same error (405-post not supported)
Initially I thought it was sitemesh related. However when I looked into it a bit more in my case it was because I was using <mvc:resources /> to provide a static mapping to the decorator.
it was <mvc:resources /> that was not accepting the post requests for the decorator file as sitemesh was trying to access it using a Post request.
I changed the mapping of my decorator file to make sure it was static and responded to POST and GET requests. More details here Spring: not accept POST request under mvc:resources? how to fix that
The code I used is
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="urlMap">
<map>
<entry key="/DecTest/**" value="myResourceHandler" />
</map>
</property>
<property name="order" value="100000" />
</bean>
<bean id="myResourceHandler" name="myResourceHandler"
class="org.springframework.web.servlet.resource.ResourceHttpRequestHandler">
<property name="locations" value="/DecTest/" />
<property name="supportedMethods">
<list>
<value>GET</value>
<value>HEAD</value>
<value>POST</value>
</list>
</property>
<!-- cacheSeconds: maybe you should set it to zero because of the posts-->
</bean>

Answer 2

Well as you figured out that the problem was with sitemesh. this link is to a project integrating springMVC with sitemesh