Tamcat Learning 1 using MAVEN to create a new WebApp and read variable values from HelloServlet

1. In relation to the previous article, you need to create a new Helloservlet.java:

Package Org.ms.bop.server;import Java.io.ioexception;import Javax.servlet.servletexception;import Javax.servlet.http.httpservlet;import Javax.servlet.http.httpservletrequest;import javax.servlet.http.httpservletresponse;/** * Servlet Implementation class HelloServlet */public class HelloServlet    Extends HttpServlet {private static final long serialversionuid = 1L;      /** * Default constructor. */Public HelloServlet () {//TODO auto-generated constructor stub}/** * @see Httpservlet#doget (httpservletr Equest request, httpservletresponse response) */protected void doget (HttpServletRequest request, HttpServletResponse Response) throws Servletexception, IOException {request.setattribute ("Hello", "world1"); Request.getrequestdispatcher ("hello.jsp"). Forward (request, response);} /** * @see Httpservlet#dopost (httpservletrequest request, httpservletresponse response) */protected void DoPost ( HttpServletRequest request, HttpServletResponse response) throws Servletexception, Ioexception {//TODO auto-generated method stub}} 

2. New hello.jsp:

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "    pageencoding=" UTF-8 "%>    <%@ page iselignored=" false "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >

3. Configure Web. XML:
<! DOCTYPE Web-app Public "-//sun Microsystems, INC.//DTD Web Application 2.3//en" "Http://java.sun.com/dtd/web-app_2_3. DTD "><web-app><display-name>archetype Created Web application</display-name><servlet> <servlet-name>helloservlet</servlet-name><servlet-class>org.ms.bop.server.helloservlet</ Servlet-class></servlet><servlet-mapping><servlet-name>helloservlet</servlet-name> <url-pattern>/hello.do</url-pattern></servlet-mapping></web-app>

4. Publish Access:
Http://127.0.0.1:8080/WebTest/hello.do

The returned is:
Hello:world1

5. Summary of issues:
If the JSP does not add:
<%@ page iselignored= "false"%>

Will not recognize the EL, it shows:
Hello:${hello}






Tamcat Learning 1 using MAVEN to create a new WebApp and read variable values from HelloServlet