JSF bean和對象

Question

我有一個JSF項目，我正在嘗試做一個登錄頁面，在我的項目中我有一個託管的bean，它擁有用戶名和密碼的validate方法，並且我有一個包含setter的bean類和獲取者，其中有用戶信息填充數據庫如（用戶名，密碼，isActive，全名），我的問題是如何在我的xhtml頁面中調用JSF el表達式中的用戶信息，如果他們不在託管bean？

這是我的java bean：

@Table(name="students_info") 
public class User { 
    @Column(name="std_record_id") 
    private int id; 

    @Column(name="std_id") 
    private String userId; 

    @Column(name="first_name") 
    private String firstName; 

    @Column(name="web_password") 
    private String password; 

    public int getId() { 
     return id; 
    } 

    public void setId(int id) { 
     this.id = id; 
    } 


    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getUserId() { 
     return userId; 
    } 

    public void setUserId(String userId) { 
     this.userId = userId; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 
} 

這裏是我的MBLogin：

@ManagedBean 
    @SessionScoped 
    public class MBLogin { 

     User user = new User(); 
     LoginDAO loginDao = new LoginDAO(); 

     public String validteStudent() { 
      boolean valid = loginDao.validateStudent(user.getUserId(), user.getUserId()); 
      if (valid) { 
       HttpSession session = SessionUtils.getSession(); 
       session.setAttribute("username", user); 
       return "student"; 
      } else { 
       FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_WARN, 
         "Incorrect Username and Passowrd", "Please enter correct username and Password")); 
       return "login"; 
      } 
     } 
    } 

Answer 1

添加一個getter用戶：

@ManagedBean 
    @SessionScoped 
    public class MBLogin { 

     User user = new User(); 
     LoginDAO loginDao = new LoginDAO(); 

     public String validteStudent() { 
      boolean valid = loginDao.validateStudent(user.getUserId(), user.getUserId()); 
      if (valid) { 
       HttpSession session = SessionUtils.getSession(); 
       session.setAttribute("username", user); 
       return "student"; 
      } else { 
       FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_WARN, 
         "Incorrect Username and Passowrd", "Please enter correct username and Password")); 
       return "login"; 
      } 
     } 
     public User getUser() { 
      return user; 
     } 
    } 

然後在你的XHTML，你可以這樣稱呼：
#{user.id}，#{user.firstName}