Struts 2 radio button list
am working on Struts 2 radio button. I want to retrieve the list from my action class but it is giving following error
org.apache.jasper.JasperException: tag 'radio', field 'list', name 'user.yourGender': The requested list key '#user.gender' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]
my action class & user class is as follow
HelloAction
package com.geekcap.struts2.action;
import com.geekcap.struts2.model.User;
import com.opensymphony.xwork2.ActionSupport;
import java.util.List;
import java.util.ArrayList;
public class HelloAction extends ActionSupport
{
private User user;
public String execute() throws Exception
{
return "success";
}
public void validate()
{
if(user.getName().length()==0)
{
addFieldError("user.name", "User Name is required");
}
if(user.getAge()==0)
{
addFieldError("user.age","Age is required");
}
if(user.getPassword().length()==0)
{
addFieldError("user.password","Please enter your password !");
}
/* if(user.getGender().equals("-1"))
{
addFieldError("user.gender","Please select gender !");
}*/
}
public User getUser()
{
return user;
}
public void setUser(User userbean)
{
user=userbean;
}
}
User class
package com.geekcap.struts2.model;
import java.util.List;
import java.util.ArrayList;
public class User
{
private String name,password;
// private List like;
private int age;
private List<String> gender;
private String yourGender;
public User()
{
gender= new ArrayList<String>();
gender.add("MALE");
gender.add("FEMALE");
gender.add("UNKNOWN");
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password=password;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age=age;
}
public List<String> getGender()
{
return gender;
}
public void setGender(List<String> gender)
{
this.gender=gender;
}
public void setYourGender(String yourGender)
{
this.yourGender=yourGender;
}
public String getYourGender()
{
return yourGender;
}
public String getDefaultGenderValue()
{
return "UNKNOWN";
}
helloForm.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<%@ 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=UTF-8">
<title>Welcome to Struts 2</title>
</head>
<body>
<s:form action="Hello">
<s:textfield name="user.name" label="User name" value="shahid"/>
<s:password name="user.password" label="Password"/>
<s:textfield name="user.age" label="Age"/>
<s:radio label="Gender" name="user.yourGender" list="user.gender" value="defaultGenderValue"/>
<s:submit/>
</s:form>
</body>
</html>
hello.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ 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=UTF-8">
<title>Hello, Struts 2</title>
</head>
<body>
<h4>
Hello, <s:property value="user.name"/>!
<br>Your password :<s:property value="user.password"/></br>
<br>your age :<s:property value="user.age"/></br>
<br>Gender :<s:property value="user.yourGender"/></br>
</h4>
</body>
</html>
Answer
Are you sure the list gender is NOT null in the JSP?
If it is null, then struts will not see it and therefore think it isn't there