The Redirect Result makes a new call to the resources. It calls the HttpServletResponse.sendRedirect() internally. The reson of doing this means the action error, field error, actions instance are no longer available, they are lost. Because action is built on single thread-model. There is only one way to pass data is through session or request parameters (?id=userId). To use Redirect Result in your application you need to do following mapping.
<action name="doLogin" class="net.roseindia.Login"> <result name="success" type="redirect">resource Page</result> <result name="error" type="redirect">error Page</result> </action>
An Example of Redirect Result is given below
login.jspADS_TO_REPLACE_1
<%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> <title>Login Application</title> </head> <body bgcolor=lighblue> <s:form action="login" method="POST"> <table border=1 colspacing=5 colspading=5 align=center> <tr> <td colspan=3 align=center> <font color=megenta face=arier>Please Login</font> </td> </tr> <tr> <td colspan=3 align=center> <s:actionerror /> <s:fielderror /> </td> </tr> <s:textfield name="username" label="Login name"/> <s:password name="password" label="Password"/> <s:submit value="Login" align="center"/> </table> </s:form> </body> </html>
home.jsp
<%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> </head> <body > <center> <h1> Home Page</h1> <font color=green size=15 face=modern> Welcome </font><br> </center> </body> </html>
Login.java
package net.roseindia; import com.opensymphony.xwork2.ActionSupport; public class Login extends ActionSupport { public String execute() throws Exception { System.out.println("Login Action Called"); if(getUsername().equalsIgnoreCase("")|| getPassword().equalsIgnoreCase("")){ return ERROR; } else if(!getPassword().equals("Admin")){ return ERROR; }else{ return SUCCESS; } } private String username = null; public String getUsername() { return username; } public void setUsername(String value) { username = value; } private String password = null; public String getPassword() { return password; } public void setPassword(String value) { password = value; } }
struts.xmlADS_TO_REPLACE_2
<?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> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <package name="roseindia" extends="struts-default"> <action name="login"> <result>/jsp/login.jsp</result> </action> <!-- Redirect to another namespace --> <action name="doLogin" class="net.roseindia.Login"> <result name="success" type="redirect">secure/homePage</result> <result name="error" type="redirect">error/errorPage</result> </action> </package> <package name="secure" namespace="/secure" extends="struts-default"> <action name="homePage"> <result>/jsp/home.jsp</result> </action> </package> <package name="error" namespace="/error" extends="struts-default"> <action name="errorPage"> <result>/jsp/error.jsp</result> </action> </package> </struts>
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