Question

我正在使用Struts2框架开发新的Web应用程序，eclipse，并且我已经使用Hibernate映射了db结构。问题是，当我执行“list”操作时，框架会返回此错误：


    Struts Problem Report

    Struts has detected an unhandled exception:

    Messages:   
    This context must be accessed through a java: URL
    Unable to lookup JNDI name [java:comp/env/jdbc/main]
    File:   org/apache/naming/SelectorContext.java
    Line number:    776

server.xml是：



<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
    <Listener SSLEngine="on" className="org.apache.catalina.core.AprLifecycleListener"/>
    <Listener className="org.apache.catalina.core.JasperListener"/>
    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>
    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/>

    <GlobalNamingResources>
        <Resource auth="Container" defaultAutoCommit="false" driverClassName="net.sourceforge.jtds.jdbc.Driver" maxActive="200" maxIdle="100" maxWait="20000" name="jdbc/main" password="########" type="javax.sql.DataSource" url="jdbc:jtds:sqlserver://10.4.1.85/SBAGRU_DEV" username="****"/>

    </GlobalNamingResources>
    <Service name="Catalina">
        <Connector connectionTimeout="2000" executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

        <Connector SSLEnabled="true" clientAuth="false" keystoreFile="C:\jpeople.bin" keystorePass="gesbanke" keystoreType="PKCS12" maxThreads="200" port="8443" protocol="HTTP/1.1" scheme="https" secure="true" sslProtocol="SSL"/>

        <!--<Connector port="8009" protocol="AJP/1.3" redirectPort="8443"/> -->
        <Engine defaultHost="localhost" name="Catalina">
            <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true" xmlNamespaceAware="false" xmlValidation="false"> 
                <Context docBase="mag0" path="/mag0" reloadable="true" source="org.eclipse.jst.jee.server:mag0">
                    <ResourceLink global="jdbc/main" name="jdbc/main" type="javax.sql.DataSource" />
                </Context>
            </Host>
        </Engine>
    </Service>
</Server>

<?xml version="1.0" encoding="UTF-8"?> <Server port="8005" shutdown="SHUTDOWN"> <Listener SSLEngine="on" className="org.apache.catalina.core.AprLifecycleListener"/> <Listener className="org.apache.catalina.core.JasperListener"/> <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/> <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/> <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/> <GlobalNamingResources> <Resource auth="Container" defaultAutoCommit="false" driverClassName="net.sourceforge.jtds.jdbc.Driver" maxActive="200" maxIdle="100" maxWait="20000" name="jdbc/main" password="########" type="javax.sql.DataSource" url="jdbc:jtds:sqlserver://10.4.1.85/SBAGRU_DEV" username="****"/> </GlobalNamingResources> <Service name="Catalina"> <Connector connectionTimeout="2000" executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" redirectPort="8443"/> <Connector SSLEnabled="true" clientAuth="false" keystoreFile="C:\jpeople.bin" keystorePass="gesbanke" keystoreType="PKCS12" maxThreads="200" port="8443" protocol="HTTP/1.1" scheme="https" secure="true" sslProtocol="SSL"/>  <Engine defaultHost="localhost" name="Catalina"> <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true" xmlNamespaceAware="false" xmlValidation="false"> <Context docBase="mag0" path="/mag0" reloadable="true" source="org.eclipse.jst.jee.server:mag0"> <ResourceLink global="jdbc/main" name="jdbc/main" type="javax.sql.DataSource" /> </Context> </Host> </Engine> </Service> </Server>

我也是hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
    <Listener SSLEngine="on" className="org.apache.catalina.core.AprLifecycleListener"/>
    <Listener className="org.apache.catalina.core.JasperListener"/>
    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>
    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/>

    <GlobalNamingResources>
        <Resource auth="Container" defaultAutoCommit="false" driverClassName="net.sourceforge.jtds.jdbc.Driver" maxActive="200" maxIdle="100" maxWait="20000" name="jdbc/main" password="########" type="javax.sql.DataSource" url="jdbc:jtds:sqlserver://10.4.1.85/SBAGRU_DEV" username="****"/>

    </GlobalNamingResources>
    <Service name="Catalina">
        <Connector connectionTimeout="2000" executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

        <Connector SSLEnabled="true" clientAuth="false" keystoreFile="C:\jpeople.bin" keystorePass="******" keystoreType="PKCS12" maxThreads="200" port="8443" protocol="HTTP/1.1" scheme="https" secure="true" sslProtocol="SSL"/>

        <!--<Connector port="8009" protocol="AJP/1.3" redirectPort="8443"/> -->
        <Engine defaultHost="localhost" name="Catalina">
            <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true" xmlNamespaceAware="false" xmlValidation="false"> 
                <Context docBase="mag0" path="/mag0" reloadable="true" source="org.eclipse.jst.jee.server:mag0">
                    <ResourceLink global="jdbc/main" name="jdbc/main" type="javax.sql.DataSource" />
                </Context>
            </Host>
        </Engine>
    </Service>
</Server>

我有什么建议吗？我真的疯了！

Answer 1

我找到了解决方案，以及真正的问题。我在 Eclipse 中编辑 server.xml ，但我没有看到真正的发布结果。出于奇怪的原因， eclipse 删除了真正的 server.xml 中的资源链接，但是在 eclipse 视图中显示了该链接。所以我整天都在gooogled，我发现我必须在 WEB-INF 目录下添加 context.xml 文件：

<?xml version="1.0" encoding="UTF-8"?> 
<Context antiJARLocking="true" path="">
<ResourceLink global="jdbc/main" name="jdbc/main" type="javax.sql.DataSource" /> 
</Context>

Answer 2

您是否在web.xml中找到了资源的链接：

<resource-ref>
  <description>JTDS Datasource</description>
  <res-ref-name>jdbc/main</res-ref-name>
  <res-type>javax.sql.DataSource</res-type>
  <res-auth>Container</res-auth>
</resource-ref>

了解更多信息，请查看Tomcat文档：http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html

Answer 3

通常，JDBC数据源也配置为<Resource>，如下所示

  <Resource name="jdbc/main" auth="Container" type="javax.sql.DataSource"
               maxActive="100" maxIdle="30" maxWait="10000"
               username="******" password="######" driverClassName="net.sourceforge.jtds.jdbc.Driver"
               url="jdbc:jtds:sqlserver://10.4.1.85/SBAGRU_DEV"/>

您可以尝试使用此内部标记。只需将上面<ResourceLink>元素替换为<Resource>。

您所做的工作似乎是正确的，因为<ResourceLink>用于链接<GlobalNamingResources>中定义的资源，不知道为什么它不起作用。

Answer 4

请看一下这个链接 Hibernate + Tomcat 7

我遇到了同样的问题：在Tomcat更新之后，这个bug已经消失了。

javax.naming.NamingException，Tomcat7和Struts2无法通过JNDI访问DB资源

4 个答案: