Adding ContextLoaderListener to web.xml in Spring MVC

Question

I am new to Spring MVC. I have a web application. I have the following configuration:

<welcome-file-list> <welcome-file>list.html</welcome-file> </welcome-file-list> <servlet> <servlet-name>spring</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> 

Do I need to add the following line to the web.xml file?

 <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> 

Answer 1

Yes, you need to add ContextLoaderListener to web.xml , only if you want to load other Spring xml files, and also when loading the application and you can specify them as

 <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/spring-security.xml </param-value> </context-param> 

Answer 2

Only if you have two xml configuration files. One with / DAO services and the other with a controller. If you configured everything in one spring configuration file, you do not need ContextLoaderListener , a servlet dispatcher is enough.

It is recommended that you split the configuration into two and use the ContextLoaderListener to create the root context of the application and the dispatcher servlet to create the web-level application context.

Answer 3

This is optional, you really don't need it just for Spring MVC ( DispatcherServlet will do). But adding Spring security to your Spring MVC should be done with

 <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> 

Just one note, if you are using ContextLoaderListener , you will need to add DelegatingFilterProxy :

 <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <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>/admin</url-pattern> </filter-mapping> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/spring-security.xml </param-value> </context-param> 

in your web.xml. Sorry for being too late. Greetings

Answer 4

 <servlet> <servlet-name>spring</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml,WEB-INF/spring-security.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>UR_PATTERN</url-pattern> </servlet-mapping> 

It worked for me.