Web. XML configuration Details-Brief introduction

　　

<!--web. XML Elements Introduction-

<?xml version= "1.0" encoding= "UTF-8"?>
<web-app version= "2.5"
Xmlns= "Http://java.sun.com/xml/ns/javaee"
Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"
Xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee
Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd ">

<display-name>sample application</display-name>

<!--file List--
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>

<description>
This is a Page!
</description>

<!--Filters--->
<filter>
<filter-name>SampleFilter</filter-name>
<filter-class>mypack. Samplefilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SampleFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>

<!--servlet configuration:<servlet-mapping> to map--
<servlet>
<servlet-name>SampleServlet</servlet-name>
<servlet-class>com.example.AddServlet.AddEmpServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>SampleServlet</servlet-name>
<url-pattern>/add</url-pattern>
</servlet-mapping>

<!--error page reference--
<error-page>
<error-code>500</error-code>
<location>/error.htm</location>
</error-page>

<!--sessions saved in seconds:
<session-config>
<session-timeout>500</session-timeout>
</session-config>

<!--all tag libraries in the Web--
<taglib>
<taglib-uri>/mytaglib</taglib-uri>
<taglib-location>/WEB-INF/mytaglib.tld</taglib-location>
</taglib>

<!--configuration Resource reference: Servlet container manages a JNDI Resource---
<resource-ref>
<description>db connection</descrition>
<res-ref-name>jdbc/sampleDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>

<!--Configure secure login Verification page-
<login-config>
<auth-method>FORM</auth-method>
<realm-name>tomcat Server Configuration form-based authentication area<realm-name>
<form-login-config>
<form-login-page>/login.jsp</form-login-page>
<form-login-config>/check.jsp</form-login-config>
<form-error-page>/error.jsp</form-error-page>
</form-login-config>
</login-config>

</web-app>

Web. XML configuration Details-Brief introduction