首页 \ 问答 \ 错误消息“cvc-complex-type.4:Attribute'bean-discovery-mode'必须出现在元素'beans'上。”(Error message “cvc-complex-type.4: Attribute 'bean-discovery-mode' must appear on element 'beans'.”)

错误消息“cvc-complex-type.4:Attribute'bean-discovery-mode'必须出现在元素'beans'上。”(Error message “cvc-complex-type.4: Attribute 'bean-discovery-mode' must appear on element 'beans'.”)

我有一个简单的Java EE项目,在WEB-INF下有一个简单的beans.xml。 它基本上什么都没有。 但我总是得到这个错误消息“cvc-complex-type.4:属性'bean-discovery-mode'必须出现在元素'beans'上。” 在JBoss Developer Studio中为“ http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd ”行指明。

这条消息是什么意思? 我用谷歌搜索但没有发现任何东西。 可能是什么原因导致的

<?xml version="1.0" encoding="UTF-8"?>
<!-- Marker file indicating CDI should be enabled -->
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
        http://xmlns.jcp.org/xml/ns/javaee
        http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd">

    <!-- Uncomment this alternative to see EJB declarative transactions in 
        use -->
    <!-- <alternatives> -->
        <!-- <class>org.jboss.as.quickstarts.greeter.domain.EJBUserDao</class> -->
    <!-- </alternatives> -->
</beans>

I have a simple Java EE project and under WEB-INF there is a simple beans.xml. It basically contains nothing. But I always got this error message "cvc-complex-type.4: Attribute 'bean-discovery-mode' must appear on element 'beans'." indicated for the line "http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd" in JBoss Developer Studio.

What does this message mean? I googled but found nothing. What might cause this?

<?xml version="1.0" encoding="UTF-8"?>
<!-- Marker file indicating CDI should be enabled -->
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
        http://xmlns.jcp.org/xml/ns/javaee
        http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd">

    <!-- Uncomment this alternative to see EJB declarative transactions in 
        use -->
    <!-- <alternatives> -->
        <!-- <class>org.jboss.as.quickstarts.greeter.domain.EJBUserDao</class> -->
    <!-- </alternatives> -->
</beans>

原文:https://stackoverflow.com/questions/26686423
更新时间:2024-01-01 13:01

最满意答案

由于AsyncTask实例依赖于调用者Activity ,我认为这不是正确的方法。 在您的情况下,由于您需要在任何 Activity恢复结果,我将使用未绑定的Service以便随时随地访问它。

您还可以使用本地BroadcastReceiver ,它将向您的所有Activity发送信号,并且那些注册发送AsyncTask / Service的操作的人将执行您可能需要的必要操作。 请注意,好像您的Activity尚未启动,显然Activity不能处理您发送的内容,因为该接收者应该取消注册。


Since AsyncTask instances are dependent of the caller Activity, I think this is not the correct approach. In your case, as you need to recover the result within any Activity, I'd use an unbound Service so it might be accessed whenever you want, wherever you want.

You might also use a local BroadcastReceiver which would send a signal to all of your Activitys and, those registering the action that sent your AsyncTask/Service, would perform the necessary actions you may need. Be careful as if your Activity has not been started, obviously that Activity won't be able to process what you've sent since that receiver should be unregistered.

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