Question

我正在使用jboss-seam-2.2.0.GA，authenticator类来验证登录过程。当我输入用户名和密码并提交页面时，我在日志中收到以下错误消息：

application E javax.el.PropertyNotFoundException: /login.xhtml @27,76 action="#{authenticator.login()}": Target Unreachable, identifier 'authenticator' resolved to null
 javax.faces.el.EvaluationException: javax.el.PropertyNotFoundException: /login.xhtml @27,76 action="#{authenticator.login()}": Target Unreachable, identifier 'authenticator' resolved to null
 at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
 at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
 at javax.faces.component.UICommand.broadcast(UICommand.java:387)

以下是代码：

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:rich="http://richfaces.org/rich" template="layout/noMenuTemplate.xhtml">
<ui:define name="body">
    <div id="content">
                <h:form id="loginForm">
        <rich:panel>
            <f:facet name="header">Login</f:facet>
            <h:messages />
<div class="dialog"><h:panelGrid columns="2" rowClasses="prop"
                columnClasses="name,value">
                <h:outputLabel for="username">Username</h:outputLabel>
                <h:inputText id="username" value="#{credentials.username}"
                    style="width: 150px;" />
                <h:outputLabel for="password">Password</h:outputLabel>
                <h:inputSecret id="password" value="#{credentials.password}"
                    style="width: 150px;" />
            </h:panelGrid></div>

            <div class="actionButtons"><h:commandButton id="submit"
                styleClass="button" value="Login" action="#{authenticator.login()}" /></div>
        </rich:panel>
        </h:form>
           </div>
</ui:define>
</ui:composition>

Authenticator.java

@Name("authenticator")
@AutoCreate
public class Authenticator {    
    @Logger Log log;
    @In Identity identity;
    @In Credentials credentials;
    @In Session hibernateSession;

    public Authenticator() {}

    public void login() throws IOException {
        log.debug("calling login method ............... ");

        HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();

        StringBuffer location = new StringBuffer(request.getContextPath());
        location.append("/j_security_check?j_username=");
        location.append((credentials.getUsername() != null) ? credentials.getUsername() : "");
        location.append("&j_password=");
        location.append((credentials.getPassword() != null) ? credentials.getPassword() : "");

        log.debug("LOCATION : " + location.toString());

        HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
        response.sendRedirect(response.encodeRedirectURL(location.toString()));      
    }
}

Answer 1

您的身份验证器类似乎已正确实施。我会在你的日志中进一步搜索并找出它没有被创建的原因。

另外，我建议从components.xml发布相关部分。应该是这样的：

<security:identity authenticate-method="#{authenticator.login}"/>

SEAM中“目标无法访问，标识符'身份验证者'解析为空”

1 个答案: