JSP page forwarding to servlet

A simple example of how JSP pages are forwarded to the servlet, Environment Eclipse, Tomcat

1. The project directory structure is as follows

2. Each part of the code is as follows

1>index.jsp

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "    pageencoding=" Utf-8 "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >
2>web.xml
<?xml version= "1.0" encoding= "UTF-8"? ><web-app xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xmlns= "Http://java.sun.com/xml/ns/javaee" xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee/http Java.sun.com/xml/ns/javaee/web-app_2_5.xsd "id=" webapp_id "version=" 2.5 ">  <servlet>    < Servlet-name>forward</servlet-name>    <servlet-class>com.scd.servlet.forwardservlet</ servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>forward</ servlet-name>    <url-pattern>/Forward</url-pattern>  </servlet-mapping></web-app >
3>forwardservlet.java
Package Com.scd.servlet;import Java.io.ioexception;import Javax.servlet.servletexception;import Javax.servlet.annotation.webservlet;import Javax.servlet.http.httpservlet;import Javax.servlet.http.httpservletrequest;import javax.servlet.http.httpservletresponse;/** * servlet implementation Class ForwardServlet */@WebServlet ("/forwardservlet") public class ForwardServlet extends HttpServlet {private static           Final long serialversionuid = 1L;        /** * @see httpservlet#httpservlet () */public ForwardServlet () {super (); TODO auto-generated Constructor stub}/** * @see Httpservlet#doget (httpservletrequest request, HttpServletResponse R esponse) */protected void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {//TODO auto-generated method StubSystem.out.println ("My first servlet!");} /** * @see Httpservlet#dopost (httpservletrequest request, httpservletresponse response) */protected void DoPost ( HttpservletrEquest request, HttpServletResponse response) throws Servletexception, IOException {//TODO auto-generated method stub}} 
Process details: When you click on the forward connection, the request arrives at the server Tomcat, Tomcat checks all the <servlet-mapping></servlet-mapping> in the current project's Web. xml
The property value of <url-pattern></url-pattern> in the configuration. See if either one is the same as the request address forward. The results are found as follows:
<servlet-mapping>
<servlet-name>Forward</servlet-name>
<url-pattern>/Forward</url-pattern>
</servlet-mapping>
Where <url-pattern>/Forward</url-pattern> is your access address
Then Tomcat finds the <servlet-name> <servlet> corresponding to the <servlet-mapping>, and according to the <servlet-name> attribute, Found the same name for the <servlet-name>Forward</servlet>
As follows:
<servlet>
<servlet-name>Forward</servlet-name>
<servlet-class>com.scd.servlet.ForwardServlet</servlet-class>
</servlet>
Find the servlet file Forwardservlet.java according to <servlet-class> above.
Execution results, in terminal output:
JSP page forwarding to servlet