通过@ManagedProperty从一个托管bean访问另一个托管bean

Question

我有2个jsf页面和2个bean。第一个页面是登录页面，用户在其中输入登录密码，然后重定向到邮箱页面。我想从登录页面到邮箱页面的数据。

My bean for login page:

@ManagedBean(name = "login")
@ConcurrencyManagement(ConcurrencyManagementType.CONTAINER)
@RequestScoped
public class LoginFormBean {
    @EJB
    private LoginService loginService;
    private String email;
    private String password;
    public String getEmail() {
        return email;
    }
    public String getPassword() {
        return password;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String login() {
        if (loginService.loginUser(email, password))
          return "mailBox.xhtml?faces-redirect=true";
        else return "";
    }
}

My bean for mailbox page:

@ManagedBean(name = "mailBox")
@ConcurrencyManagement(ConcurrencyManagementType.CONTAINER)
@RequestScoped
public class MailBoxFormBean {
    @ManagedProperty(value = "#{login}")
    private LoginFormBean login;
    private String email = login.getEmail();
    public void setLogin(LoginFormBean login) {
        this.login = login;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getEmail() {
        return email;
    }
}

但是当我重定向到邮箱页面时，登录bean是空的，我无法从中获取数据。我做错了什么?

我看过很多教程和答案(例如，使用@ManagedProperty在托管bean或之间调用方法http://www.techartifact.com/blogs/2013/01/access-one-managed-bean-from-another-in-jsf-2-0.html)

Answer 1

问题是您的login bean被标记为@RequestScoped，因此一旦您从登录页面重定向，该值将被丢弃。尝试@SessionScoped代替:这通常是正确的范围为用户登录信息