Java SEAM中的“无法访问目标，标识符“authenticator”解析为空”

我使用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)

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您的验证器类似乎已正确实现。我会在你的日志中进一步搜索，找出为什么没有创建它

另外，我建议发布components.xml中的相关部分。应该是这样的：

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

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在components.xml中，您告诉它调用{authenticator.authenticate}，但是您的authenticator类没有authenticate方法。尝试将其更改为{authenticator.login}

@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()));      
    }
}

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