Target Unreachable, 'null' returned null in JSF2 - jsf

Question

I am quite new to JSF and I have this problem. I was reading some posts about that but I could found answer( or I didnt understood one...).
I have following user bean:
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
#ManagedBean(name="user")
#SessionScoped
public class User implements Serializable {
private String login;
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
}
and login bean:
#ManagedBean(name="login")
#SessionScoped
public class Login implements Serializable{
private static final long serialVersionUID = 1L;
#ManagedProperty("#{user}")
private User user;
#PostConstruct
public void init() {
System.out.println("Init called");
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
And my view looks like this:
<h:inputText id="login" value="#{login.user.login}" required="true"/>
<h:commandButton value="Login" action="#{login.user.login}"/><br/>
I want access to user fields in few classess and this how I am trying to achieve this. Unfortunately I keep got this error.
I have found some information that I need beans.xml. Is that true? Where can I find sample? I am using JSF2.
Answer
My fault was that I choose same name for field and for login method. Because of that I was using login.login( before implementing User class) for geting login, and login.login as a action of commandButton. After I implemented User class I changed both login.login to login.user.login.
Thanks again for help.

Answer 1

You are binding a method User#login() to your CommandButton, which does not exist. There is only a property login (get/set).
You need a proper action method in your User bean:
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
#ManagedBean(name="user")
#SessionScoped
public class User implements Serializable {
private String login;
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public void doLogin() {
// whatever you want to do here
}
}
and bind to the doLogin() method:
<h:commandButton value="Login" action="#{login.user.doLogin}"/>
beans.xml is required to enable CDI, which you don't use here. You are using jsf managed beans. CDI is a more powerful alternative.