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我有 2 个 jsf 页面和 2 个 bean。第一个页面是登录页面，用户输入他的登录密码，然后他重定向到他的邮箱页面。我想从登录页面获取数据到邮箱页面。

我用于登录页面的 bean：

@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 "";
    }

}

我的邮箱页面 bean：

@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 为空，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， Using @ManagedProperty to call method between Managed beans or http://www.techartifact.com/blogs/2013/01/access-one-managed-bean-from-另一个-in-jsf-2-0.html )

我做的完全一样，但它对我不起作用。

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1 回答 1

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The problem is that your login bean is marked as @RequestScoped, so as soon as you redirect away from the login page, the value is discarded. Try @SessionScoped instead: that's usually the correct scope for user login information.

于 2013-03-12T06:58:49.507 回答