Struts2 entry Demo and struts2demo

Struts2 entry Demo and struts2demo

This article describes the struts2 getting started Demo. Share it with you for your reference. The details are as follows:

1. Create a Web Project named struts2Demo;

2. Create a user library struts2, which contains at least six jar files of struts2;
In fact, it is not necessary for MyEclipse8 or above, because it directly supports struts2 and does not need to export packages.

3. Use Build Path to add the struts2 database;

4. Add the following configuration to web. xml:

<? 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"> <! -- Struts2 configuration --> <filter-name> struts2 </filter-name> <filter-class> org. apache. struts2.dispatcher. ng. filter. strutsPrepareAndExecuteFilter </filter-class> </filter> <filter-mapping> <filter-name> struts2 </filter-name> <url-pattern>/* </url-pattern> </filter-mapping> <welcome-file-list> <welcome-file> index. jsp </welcome-file> </welcome-file-list> </web-app>

5. Create an Action

Package com. yenange. action; import com. opensymphony. xwork2.Action; public class LoginAction implements Action {private String uname; // name private String upass in the form; // password in the form // execution method @ Override public String execute () throws Exception {System. out. println ("name:" + uname); System. out. println ("Password:" + upass); if (uname. equals ("leaf") & upass. equals ("leaf") {return "success";} return "error";} // remember to have the get and set Methods public String getUpass () {return upass ;} public void setUpass (String upass) {this. upass = upass;} public String getUname () {return uname;} public void setUname (String uname) {this. uname = uname ;}}

6. Three page files:

Index. jsp:

<% @ Page language = "java" import = "java. util. * "pageEncoding =" gbk "%> 
Welcome. jsp:
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%> 
Fail. jsp:
<% @ Page language = "java" import = "java. util. * "pageEncoding =" gbk "%> 
7. Configure struts. xml. (For MyEclipse6, you can only copy the file from other places)
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC   "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"   "http://struts.apache.org/dtds/struts-2.0.dtd" > <struts>   <package name="default" namespace="/" extends="struts-default">     <action name="login" class="com.yenange.action.LoginAction">       <result name="success">/welcome.jsp</result>       <result name="error">/fail.jsp</result>     </action>   </package>   <!-- Add packages here --> </struts>
8. Now, you can run it. Is it easy?
The following describes how to obtain the request, session, and application.
Package com. yenange. action; import java. util. map; import javax. servlet. servletContext; import javax. servlet. http. httpServletRequest; import javax. servlet. http. httpServletResponse; import javax. servlet. http. httpSession; import org. apache. struts2.ServletActionContext; import org. apache. struts2.interceptor. servletRequestAware; import org. apache. struts2.interceptor. sessionAware; import org. apache. struts 2. util. servletContextAware; import com. opensymphony. xwork2.Action; public class LoginAction implements Action, ServletRequestAware, SessionAware, ServletContextAware {private String uname; // The name private String upass in the form; // The password HttpServletRequest request in the form; // common request Map sessions; // The common sessions are different, but ServletContext application is not required; // common application // The second method is used; httpServletRequest request2 = ServletAc TionContext. getRequest (); HttpServletResponse response2 = ServletActionContext. getResponse (); HttpSession session2 = request2.getSession (); @ Override public void setServletRequest (HttpServletRequest req) {this. request = req ;}@ Override public void setSession (Map session) {this. session = session;} @ Override public void setServletContext (ServletContext application) {this. application = application ;} // Execution method public String execute () throws Exception {if (uname. equals ("leaf") & upass. equals ("leaf") {request. setAttribute ("userName", uname); return "success";} request. setAttribute ("accessError", uname + "this user or password is incorrect! "); Return" error ";} // remember to have the get and set Methods public String getUpass () {return upass;} public void setUpass (String upass) {this. upass = upass;} public String getUname () {return uname;} public void setUname (String uname) {this. uname = uname ;}}
These are just a preliminary step. I will learn more about tags, dynamic methods, and so on later.
I hope this article will help you with Struts program design.