struts2 2.5（動態Action struts.xml web.xml 配置）
阿新 • • 發佈：2018-12-19
動態Action
要使用動態Action的時候，需要在struts.xml中加入
<constant name="struts.enable.DynamicMethodInvocation" value="true" />這句程式碼起到了說明動態Action的作用
還需要宣告動態Action中做使用的方法，程式碼如下：
<allowed-methods>add,update</allowed-methods>以下是一個動態Action的小例子
動態Action程式碼如下：
package action; import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport{ /** * */ private static final long serialVersionUID = 1L; private String info; public String add() throws Exception{ info = "新增使用者資訊"; return "add"; } public String update() throws Exception{ info = "更新使用者資訊"; return "update"; } public String getInfo(){ return info; } public void setInfo(String info){ this.info = info; } }
struts.xml
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" "http://struts.apache.org/dtds/struts-2.5.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <!-- 宣告包 --> <package name="myPackage" extends="struts-default"> <!-- 定義action --> <action name="userAction" class="action.UserAction"> <!-- 新增成功的對映頁面 --> <result name="add">user_add.jsp</result> <!-- 更新成功的對映頁面 --> <result name="update">user_update.jsp</result> <allowed-methods>add,update</allowed-methods> </action> </package> </struts>
三個jsp頁面（index.jsp user_add.jsp user_update.jsp）
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>首頁</title> </head> <body> <a href="userAction!add">新增使用者</a> <br> <a href="userAction!update">更新使用者</a> </body> </html>
<%@ 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>新增使用者資訊</title>
</head>
<body>
<font color="red">
<s:property value="info"/>
</font>
</body>
</html><%@ 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>更新使用者資訊</title>
</head>
<body>
<font color="red">
<s:property value="info"/>
</font>
</body>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<display-name>動態Action</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- Struts2過濾器 -->
<filter>
<!-- 過濾器名稱 -->
<filter-name>struts2</filter-name>
<!-- 過濾器類 -->
<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<!-- Struts2過濾器對映 -->
<filter-mapping>
<!-- 過濾器名稱 -->
<filter-name>struts2</filter-name>
<!-- 過濾器對映 -->
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>