[Struts2学习笔记] -- 环境配置

时间:2022-08-07 01:44:34

  在创建好WebProject后,就可以开始进行Struts2的环境配置,可以到Struts2官网下载,本环境使用struts-2.3.24.1版本。

  首先导入必要的jar包到WebProject的/WebRoot/WEB-INF/lib下,具体jar包如下图所示:

  [Struts2学习笔记] -- 环境配置

  接着修改web.xml文件,加入struts2的配置信息,文件内容如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>myStruts2</display-name>
<!-- struts2 configuration -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
<init-param>
<param-name>actionPackages</param-name>
<param-value>cn.net.bysoft</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

web.xml的配置

  现在struts2的环境配置已经建立完毕,可以编写一个HelloWorld应用进行测试了,首先创建两个jsp页面,一个是index.jsp,里面写一个<a href="helloWorld">测试HelloWorld应用</a>连接到Action。接着创建一个hello.jsp页面用来显示<h1>Hello World</h1>,具体代码如下:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head> <body>
<a href="helloWorld">test helloworld</a>
</body>
</html>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'hello.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body>
HelloWorld <br>
</body>
</html>

hello.jsp

  页面创建完毕后,开始编写Action类,创建一个普通的类,继承ActionSupport类。编写execute()方法进行页面控制,返回一个成功的标识SUCCESS,具体代码如下:

package cn.net.bysoft;

import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport {

    /**
*
*/
private static final long serialVersionUID = 6649419922238488318L; @Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return SUCCESS;
} }

HelloWorldAction的代码

  最后在/src目录下创建一个struts.xml文件,对我们编写的Action进行配置,文件内容如下:

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="struts2_3_24_1" extends="struts-default">
<action name="helloWorld" class="cn.net.bysoft.HelloWorldAction">
<result>/hello.jsp</result>
</action>
</package>
</struts>

struts.xml的内容

  以下是项目结构:

[Struts2学习笔记] -- 环境配置