標籤：style blog java 使用 檔案 os
Structs2 Result學習筆記（一）簡單介紹問題一<struts> <constant name="struts.devMode" value="true" /> <package name="resultTypes" namespace="/r" extends="struts-default"> <action name="r1"> <result type="dispatcher">/r1.jsp</result> </action> <action name="r2"> <result type="redirect">/r2.jsp</result> </action> <action name="r3"> <result type="chain">r1</result> </action> <action name="r4"> <result type="redirectAction">r2</result> </action> </package></struts>dispatcher - forward運用伺服器跳轉 伺服器跳轉 顯示action
redirect - 重新導向跳轉到jsp
chain 伺服器跳轉
redirectAction<package name="public" extends="struts-default"> <!-- Chain creatAccount to login, using the default parameter --> <action name="createAccount" class="..."> <result type="chain">login</result> </action> <action name="login" class="..."> <!-- Chain to another namespace --> <result type="chain"> <param name="actionName">dashboard</param> <param name="namespace">/secure</param> </result> </action></package><package name="secure" extends="struts-default" namespace="/secure"> <action name="dashboard" class="..."> <result>dashboard.jsp</result> </action></package>通過例子可以看出，是通過為chain配置actionName參數和namespace參數；
//前端htm<body>Result類型<ol><li><a href="user/user?type=1">返回success</a></li><li><a href="user/user?type=2">返回error</a></li><li><a href="user/user?type=3">返回global result</a></li><li><a href="admin/admin">admin,繼承user包</a></li></ol></body>
//struct.xml<struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <global-results> <result name="mainpage">/main.jsp</result> </global-results> <action name="index"> <result>/index.jsp</result> </action> <action name="user" class="com.struts2.user.action.UserAction"> <result>/user_success.jsp</result> <result name="error">/user_error.jsp</result> </action> </package> <package name="admin" namespace="/admin" extends="user"> <action name="admin" class="com.struts2.user.action.AdminAction"> <result>/admin.jsp</result> </action> </package></struts>
//類包//AdminActionpackage com.struts2.user.action;import com.opensymphony.xwork2.ActionSupport;public class AdminAction extends ActionSupport {@Overridepublic String execute() throws Exception {return "mainpage";}}//UserActionpackage com.struts2.user.action;import com.opensymphony.xwork2.ActionSupport;public class UserAction extends ActionSupport {private int type;public int getType() {return type;}public void setType(int type) {this.type = type;}@Overridepublic String execute() throws Exception {if(type == 1) return "success";else if (type == 2) return "error";else return "mainpage";}}分析1
<package name="user" namespace="/user" extends="struts-default"> <global-results> <result name="mainpage">/main.jsp</result> </global-results> <action name="index"> <result>/index.jsp</result> </action> <action name="user" class="com.struts2.user.action.UserAction"> <result>/user_success.jsp</result> <result name="error">/user_error.jsp</result> </action> </package>這段設定檔中，result 為success時，調用user_success.jsp，result為error時，調用
<package name="admin" namespace="/admin" extends="user"> <action name="admin" class="com.struts2.user.action.AdminAction"> <result>/admin.jsp</result> </action> </package>extends的作用是從另外一個包裡面繼承配置資訊，工作中使用對項目進行分模組處理，每個模組都有公用的配置資訊，這樣可以將公用配置資訊定義為<global-results>，然後被各個模組繼承，簡化處理。和c++/java中的繼承關係好像啊！
<package name="struts-default" abstract="true">預設定義了攔截器
<default-interceptor-ref name="defaultStack"/><default-class-ref class="com.opensymphony.xwork2.ActionSupport" />結論：配置很複雜，使用不需改。
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
