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我正在尝试为我的应用程序创建一个登录页面，但我被困在第一步。在我的 bean 中使用会话外观之前，我的表单工作正常，添加会话外观后，我得到属性未找到异常：

我的页面是：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:p="http://primefaces.org/ui">

    <f:view contentType="text/html">
        <h:head>
            <f:facet name="first">
                <meta content='text/html; charset=UTF-8' http-equiv="Content-Type"/>
                <title>PrimeFaces</title>
            </f:facet>
        </h:head>

        <h:body>
            <h:form>
            <p:panelGrid columns="2">
                <p:outputLabel value ="Username"/> <p:inputText id="userName" value="#{loginBean.user}"/> 
                <p:outputLabel value ="Password"/> <p:inputText id="password" value="#{loginBean.password}"/>
            </p:panelGrid>
                <p:commandButton value="Login" actionListener="#{loginBean.doLogin}"/>
            </h:form>
        </h:body>

    </f:view>
</html>

工作 Bean 代码是：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Beans;

import entities.Program;
import entities.ProgramFacade;
import entities.ProgramFacadeLocal;
import javax.inject.Named;
import javax.enterprise.context.SessionScoped;
import java.io.Serializable;
import javax.annotation.ManagedBean;
import javax.ejb.EJB;
import javax.faces.event.ActionEvent;

/**
 *
 * @author Salman Ahmed Ansari
 */
@Named(value = "loginBean")
@SessionScoped
public class LoginBean implements Serializable {

    /**
     * Creates a new instance of LoginBean
     */
    private String user;
    private String password;

    public String getUser() {
        return user;
    }

    public String getPassword() {
        return password;
    }

    public void setUser(String user) {
        this.user = user;
    }

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

    public void doLogin(ActionEvent listener){
        System.out.println(user);
        System.out.println(password);
    }

    public LoginBean() {

    }
}

并且不工作的bean代码是：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Beans;

import entities.Program;
import entities.ProgramFacade;
import entities.ProgramFacadeLocal;
import javax.inject.Named;
import javax.enterprise.context.SessionScoped;
import java.io.Serializable;
import javax.annotation.ManagedBean;
import javax.ejb.EJB;
import javax.faces.event.ActionEvent;

/**
 *
 * @author Salman Ahmed Ansari
 */
@Named(value = "loginBean")
@SessionScoped
public class LoginBean implements Serializable {
    @EJB
    private ProgramFacade programFacade;

    /**
     * Creates a new instance of LoginBean
     */
    private String user;
    private String password;

    public String getUser() {
        return user;
    }

    public String getPassword() {
        return password;
    }

    public void setUser(String user) {
        this.user = user;
    }

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

    public void doLogin(ActionEvent listener){
        System.out.println(user);
        System.out.println(password);
    }

    public LoginBean() {

    }
}

什么触发了这个异常？

提前致谢 ..

4

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