RequestMapping in spring mvc - spring

Question

I am trying to understand requestmapping in spring mvc, I have an application, actually I am just getting started with spring mvc.
I have these two urls
The first one with a forward slash at the end seems to be working fine.
http://localhost:8080/contactmanager/index/
The second one without a forward slash at the end does not work
http://localhost:8080/contactmanager/index
This second one gives me the 'HTTP Status 404 -' error, how can I force the application to be appending a forwards slash at the end of the url?
The method in the controller looks like this
#RequestMapping("/index")
public String listContacts(Map<String, Object> map) {
map.put("contact", new Contact());
map.put("contactList", contactService.listContact());
//org.springframework.web.context.ContextLoaderListener
//org.springframework.web.context.ContextLoaderListener
//org.springframework.web.servlet.DispatcherServlet
//org.springframework.web.servlet.DispatcherServlet
return "contact";
}
and my web.xml looks like this
<servlet>
<servlet-name>contactmanager</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/contactmanager-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>contactmanager</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Thanks in advance.

Answer 1

Using java configuration:
#Configuration
#EnableWebMvc
public class WebConfig {}
or using XML configuration
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven />
From Spring's reference documentation:
The above registers a RequestMappingHandlerMapping, a
RequestMappingHandlerAdapter, and an ExceptionHandlerExceptionResolver
(among others) in support of processing requests with annotated
controller methods using annotations such as #RequestMapping ,
#ExceptionHandler, and others.
In RequestMappingHandlerMapping there is useful boolean flag - decription from Javadoc:
/**
* Whether to match to URLs irrespective of the presence of a trailing slash.
* If enabled a method mapped to "/users" also matches to "/users/".
* <p>The default value is {#code true}.
*/
public void setUseTrailingSlashMatch(boolean useTrailingSlashMatch) {
this.useTrailingSlashMatch = useTrailingSlashMatch;
}
Since this is enabled by default just make sure that your configuration uses RequestMappingHandlerMapping.
If this doesn't help you, check that spring's default servlet is configured: <mvc:default-servlet-handler/> and try add to web.xml
<!-- Disables Servlet Container welcome file handling. Needed for compatibility with Servlet 3.0 and Tomcat 7.0 -->
<welcome-file-list>
<welcome-file></welcome-file>
</welcome-file-list>