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Struts2's HelloWorld

2011-10-02 21:13 225 查看

step 1 :

             Go http://struts.apache.org/2.x/, and download the

struts-2.2.3.1-all.zip . Then extract the file, you can find the lib directory.

step 2:

             Config the Environment var, CLASSPATH, add the path to the struts2's lib directory.

step 3:

             Build a new webapp for helloworld:

             HelloWorld/

                                WEB-INF/classes/

                                WEB-INF/classes/struts.xml

                                WEB-INF/lib/

                                WEB-INF/web.xml

                                JSP and HTML files.

              a. Build a new directory named "HelloWorld".

              b. Build a new directory named "WEB-INF" in the direcotry "HelloWorld".

              c.Build a new directory named "classes" in the directory "WEB-INF".

              d.Build a new directory named "lib" in the directory "WEB-INF", and then put the jar files from struts2's lib directory.

              e. Build a new file,put it to the directory "HellowWorld", which is the webapp root's directory , named "helloworld.jsp", contents as follow:

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hello world</title>
</head>
<body>
<h2><s:property value="message" /></h2>
</body>
</html>

f.Build a new file in the "WEB-INF" directory, named "web.xml", the content as follow:

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>Struts Blank</display-name>

    <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.html</welcome-file>

    </welcome-file-list>

</web-app>
g.Build a file named "struts.xml", and then put it in the "classes" directory. The content as follow:

<?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="helloworld" extends="struts-default">

       <action name="HelloWorldAction" class="helloworld.HelloWorldAction">

           <result>/helloworld.jsp</result>

       </action>

   </package>

</struts>
h.Build a file named “HelloWorldAction.java”， and then put it to the "classes" root directory, and compil it.Content as follow:

package helloworld;

import com.opensymphony.xwork2.*;

public class HelloWorldAction extends ActionSupport

{

   /**

   *

   */

   private static final long serialVersionUID = 1L;

   public static final String MESSAGE = "Hello World! , I'm from struts2";

   public String execute() throws Exception

   {

       setMessage(MESSAGE);

       return SUCCESS;

   }

   private String message;

   public void setMessage(String message)

   {

       this.message = message;

   }

   public String getMessage()

   {

       return message;

   }

}

step 4.
           put the "HelloWorld" webapp to the Tomcat's webapps directory. Then restart your tomcat.

step 5.
           type the url :"http://localhost:8080/HelloWorld/HelloWorldAction.action". if you see the picture as follow:

Congratulations , you have your first hello world with struts2.

Otherwise , you should take more carefully to read the steps.

Come on !

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标签： struts webapp string encoding build file

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