值= "#{loginClientBean.login}"：目标无法访问，标识符'loginClientBean'解析为 null

当我运行登录jsf页面时，我收到以下错误。我认为我的托管 Bean 中的valider()功能是问题所在，但我没有找到方法

在我的 ejb 中验证函数：

@Override
public Client authentificate(String login, String pwd) {
    Client client=null;
    Query query=entityManager.createQuery("select c from Client c where c.login=:l and c.pwd=:p");  
    query.setParameter("l", login).setParameter("p",pwd);
    try {
    client=(Client) query.getSingleResult();
    } catch (Exception e) {
        client=null;
    }
    return client;
}

托管豆：

@ManagedBean
@SessionScoped
public class LoginClientBean {
    @EJB
    GestionClientLocal local;
    private String login;
    private String pwd;
    private boolean connected;
    public static Client client;
    public String getLogin() {
        return login;
    }
    public void setLogin(String login) {
        this.login = login;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    String message=null;
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
    public boolean isConnected() {
        return connected;
    }
    public void setConnected(boolean connected) {
        this.connected = connected;
    }

    public  Client getClient() {
        return client;
    }
    public String valider(){
         String nav =null;
        client=local.authentificate(login, pwd);
        if (client != null){
                nav="/pages/yes?faces-redirect=true";
            }else { 
                nav="/pages/no?faces-redirect=true";
            }
        return nav;
    }
    public String deconnexion(){
           FacesContext.getCurrentInstance().getExternalContext().getSessionMap().clear();
    return "/pages/login?faces-redirect=true";
    }
}

JSF 页面：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:pt="http://xmlns.jcp.org/jsf/passthrough"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:jsf="http://xmlns.jcp.org/jsf"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
    <h:head>
<title>Flate Signup And Login Form with Flat Responsive template :: w3layouts</title>
<meta name="viewport" content="width=device-width, initial-scale=1"></meta>
<h:outputStylesheet library="css" name="style.css"></h:outputStylesheet>
<h:outputScript type="application/x-javascript"> addEventListener("load", function() { setTimeout(hideURLbar, 0); }, false); function hideURLbar(){ window.scrollTo(0,1); } </h:outputScript>
</h:head>
<h:body>
        <h:form>
            <h:panelGrid columns="2">
                <h:outputText value="login" />
                <p:inputText value="#{loginClientBean.login}" />
                <h:outputText value="password" />
                <p:password value="#{loginClientBean.pwd}" />
                <p:commandButton value="login" action="#{loginClientBean.valider()}" ajax="false"/>
            </h:panelGrid>
        </h:form>
</h:body>
</html>

从操作方法中删除 ((

    <p:commandButton value="login" action="#{loginClientBean.valider}" ajax="false"/>

为受管 Bean 命名(请注意，它应该在不指定名称的情况下工作(

 @ManagedBean(name="loginClientBean ")
 @SessionScoped
 public class LoginClientBean {
   .....
  }

如果您使用的是 JSF 2.2，请将 jdk 替换为 1.7 及更高版本.最后在部署之前给出正确的构建

另请查看巴鲁 c 解决方案 https://stackoverflow.com/a/30128396/4036926

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