HI,
I am trying to code a simple user-id and login webpage in struts. I need to
show error message when user-id or password field is left blank.
LoginAction.java:
package com.example.action;
import com.example.form.*;
import org.apache.struts.action.Action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
//import org.apache.struts.action.ActionErrors;
//import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.ActionForward;
public class LoginAction extends Action
{
public ActionForward execute(ActionMapping mapping,ActionForm
form,HttpServletRequest request,HttpServletResponse response) throws
Exception
{
LoginForm form1 = (LoginForm)form;
if(form1.getuserName().equals(form1.getpassword()))
{
return mapping.findForward("success");
}
else
{
return mapping.findForward("failure");
}
}
}
LoginForm.java:
package com.example.form;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.ActionMessage;
import com.example.*;
public class LoginForm extends ActionForm
{
private static final long serialVersionUID = -473562596852452021L;
private String userName= null;
private String password= null;
public void setuserName(String userName)
{
this.userName=userName;
}
public String getuserName()
{
return userName;
}
public void setpassword(String password)
{
this.password=password;
}
public String getpassword()
{
return password;
}
public void reset(ActionMapping mapping ,HttpServletRequest request)
{
this.userName=null;
this.password=null;
}
public ActionErrors validate(ActionMapping mapping ,HttpServletRequest
request)
{
ActionErrors errors = new ActionErrors();
if(userName==null && userName.length()==0)
{
errors.add("userName", new ActionMessage("error.userName.required"));
}
if(password==null && password.length()==0)
{
errors.add("password", new ActionMessage("error.password.required"));
}
return errors;
}
}
Below is the code that I am using in MessageResources.properties file:
error.userName.required = User Name is mandatory
error.password.required = Password is mandatory
ResourceManager.java:
package com.example;
import java.util.ResourceBundle;
public class ResourceManager
{
private static ResourceBundle
bundle=ResourceBundle.getBundle("com.example.MessageResources");
public static String getString(String key){
return bundle.getString(key);
}
}
Struts-config.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config SYSTEM "struts-config_1_0.dtd" >
<struts-config>
<form-beans>
<form-bean name= "LoginForm" type ="com.example.form.LoginForm"/>
</form-beans>
<global-exceptions></global-exceptions>
<global-forwards></global-forwards>
<action-mappings>
<action path="/Login"
type="com.example.action.LoginAction"
name="LoginForm"
scope="session"
validate="true"
input="login.jsp">
<forward name="success" path="/jsp/firstScreenSuccess.jsp"/>
<forward name="failure" path="/jsp/firstScreenFailure.jsp"/>
</action>
</action-mappings>
<message-resources parameter="com.example.form.MessageResources"/>
</struts-config>
Web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";>
<display-name>SecondStrutsApplication</display-name>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>jsp/login.jsp</welcome-file>
</welcome-file-list>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/tlds/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://struts.apache.org/tags-bean</taglib-uri>
<taglib-location>/WEB-INF/tlds/struts-bean.tld</taglib-location>
</taglib>
</web-app>
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