2. The first struts2 Program-helloworld Program

1. Create a WEB Project: study_struts2

 

2. Create a hellowordaction. Java class

3. Copy the Struts. xml file to the src directory and configure the Struts. xml file as follows:

<?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="aaaa" namespace="/test" extends="struts-default">              <action name="bbbb" class="actions.HelloWordAction">                         <result>/welcome.jsp</result>              </action>              </package></struts>

 

4. Copy web. XML to the WEB-INF directory under webroot, and then configure struts2 startup.

The Web. xml file is configured as follows:

<?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">            <filter>        <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. The hellowordaction. Java code is as follows:

package actions;public class HelloWordAction {        public String execute(){                System.out.println("I am HelloWordAction.java");        return "success";    }}

 

6. The code for creating welcome. jsp is as follows:

welcome to study Struts2!

 

7. Load struts2 core jar package, the method can be found in the http://www.cnblogs.com/xingyunblog/p/4006150.html

Xwork-core-2.1.6.jar: Core class library of structs2 framework
Struts2-core-2.1.8.1.jar: xwork class library, structs2 built on it
Ognl-2.7.3.jar: object graph Navigation language (structs2) framework reads and writes object attributes through it.
Freemarker-2.3.15.jar: structs2 UI tag template written using freemarker
Commons-logging-1.0.4.jar: the log package produced by ASF, structs2 framework uses this log package to support log4j and jdk1.4 + logging.
Commons-fileupload-1.2.1.jar: File Upload Component, which must be added after version 2.1.6.

8. Release the project and start Tomcat. Enter http: // pc2014092716pel: 8080/study_struts2/test/BBBB in the address bar of the browser.

2. The first struts2 Program-helloworld Program