Web Development Learning Note Structs2 Result learning Note (iii) results set with parameters

Result learning Note (iii) results set with parameters Part one: code

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web.xml<struts>    <constant name= "Struts.devmode" value= "true"/>    <package name= "User" Namespace= "/user" extends= "Struts-default" >        <action name= "user" class= " Com.struts2.user.action.UserAction ">    <result type=" redirect ">/user_success.jsp?t=${type}</ result>    </action>        </package>    </struts>
Class Pack Package 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 {return "Success";}}

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Part II: Analysis
1.<li><a href= "user/user?type=1" > Parameters </a></li>, link access to user action inside the user namespace, And the action is passed the parameter type = 1;
2.<package name= "user" namespace= "/user" extends= "Struts-default" >  <action name= "user" class= " Com.struts2.user.action.UserAction ">    <result type=" redirect ">/user_success.jsp?t=${type}</ result>  </action>      </package>   <result type= "redirect" >/user_success.jsp?t=${ Type}</result>
Objective:the user Action object is constructed with the data configuration file and the parameters are set. When a request is made by a client, the value passed in the request is passed to the constructed object when the Useraction object is constructed by the configuration file of Web. Xml. Note: The request has only one value stack at a time.
Result requires <result type= "redirect" >/USER_SUCCESS.JSP?T=${TYPE}</RESULT>, requires redirection to user_success.jsp, and requires removal
The type value in the action. where type= "Redirect" means that the client jumps,
3.from valuestack: <s:property value= "T"/><br/>//from value stack from  actioncontext: <s:property value= "# PARAMETERS.T "/><span style=" White-space:pre "></span>//take value from Actioncontext