struts.xml file

[Samanthi perera]

i found these code in my struts.xml file

 <servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>
        <init-param>
            <param-name>debug</param-name>
            <param-value>2</param-value>
        </init-param>
        <init-param>
            <param-name>detail</param-name>
            <param-value>2</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
        </servlet>
    <servlet-mapping>

what are the use of
1)

 <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>

2)
what are the use of

  <init-param>
            <param-name>debug</param-name>
            <param-value>2</param-value>
        </init-param>

3)are these codes required for every file?

[Ankit Garg]

This must be in the web.xml not struts.xml. The config init parameter tells struts where to look for the struts configuration file. You can find the details about initialization parameters of ActionServlet here...