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1.首先搭建Struts2的環(huán)境
新建Web工程后,將Struts2的架包(可到Struts的官方下載)考到lib目錄下面。
1.首先搭建Struts2的環(huán)境
新建Web工程后,將Struts2的架包(可到Struts的官方下載)考到lib目錄下面。
2.首先創(chuàng)建一個(gè)Action類
Java代碼
package com.wl.control.tags;
import com.opensymphony.xwork2.ActionSupport;
public class ShowCity extends ActionSupport {
private int cityId;
public int getCityId() {
return cityId;
}
public void setCityId(int cityId) { this.cityId = cityId; }
@Override public String execute() throws Exception { this.cityId=2; return "showcity"; }
}
3.創(chuàng)建JSP頁面
Java代碼
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html>
<body> <s:if test="cityId==1">北京</s:if> <s:elseif test="cityId==2">上海</s:elseif> <s:else>杭州</s:else> </body> </html>
4.配置文件Web.xml文件
Java代碼
<?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.Struts.xml配置文件
Java代碼
<?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="Struts2.1" extends="struts-default"> <action name="showcity" class="com.wl.control.tags.ShowCity"> <result name="showcity">/controlTags/showcity.jsp</result> </action> </package> </struts>
6.運(yùn)行效果如下
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