How can I tell Struts2 not to validate a form the first time it displays?
I'm currently trying to learn Struts2.
I've created a form, an action to process it, an XML to validate it, and actions in the struts.xml.
Every time the form displays, even the first time, Struts2 tries to validate, so errors are displayed before the user had a chance to complete it.
Here is the relevant code:
<!-- /WebContent/views/user/login.jsp -->
<?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ 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=ISO-8859-1">
<title>Login Page</title>
<s:head />
</head>
<body>
<h1>Login Page</h1>
<s:form action="executeUser">
<s:textfield key="userBean.userName" />
<s:password key="userBean.password" />
<s:submit align="center" />
</s:form>
</body>
</html>
<!-- /src/struts.xml -->
<?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.devMode" value="true" />
<package name="overviewofstruts" extends="struts-default">
<action name="loginUser" class="hu.flux.user.LoginUserAction" method="execute">
<result name="input">/views/user/login.jsp</result>
</action>
<action name="executeUser" class="hu.flux.user.LoginUserAction" method="execute">
<result name="input">/views/user/login.jsp</result>
<result name="success">/views/user/login_thankyou.jsp</result>
</action>
</package>
</struts>
// /src/hu/flux/user/LoginUserAction.java
package hu.flux.user;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class LoginUserAction extends ActionSupport {
private User userBean;
public void setUserBean(User userBean) { this.userBean = userBean; }
public User getUserBean() { return userBean; }
public String login() throws Exception { return this.execute(); }
public String execute() throws Exception { return SUCCESS; }
public String input() throws Exception { return INPUT; }
}
<!-- // /src/hu/flux/user/LoginUserAction-validation.xml -->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//OpenSymphony Group//XWork Validator 1.0.2//EN"
"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
<validator type="requiredstring">
<param name="fieldname">userBean.userName</param>
<message>Username is required.</message>
</validator>
<validator type="requiredstring">
<param name="fieldname">userBean.password</param>
<message>Password is required.</message>
</validator>
What do I need to do or change to get struts to show the form the first time without complaining about all the blank fields?
Answer
Yee, I know this issue. Usually I'm using following work-around.
Mark execute with org.apache.struts2.interceptor.validation.SkipValidation
@SkipValidation
public String execute() throws Exception { return SUCCESS; }
So first pass will ignore validation method. But input will be validated.