javax.naming.NamingException，Tomcat7和Struts2无法通过JNDI访问数据库资源 [英] javax.naming.NamingException, Tomcat7 and Struts2 can't access to DB resource via JNDI

问题描述

我正在使用Struts2框架(eclipse)开发新的Web应用程序，并且已经使用Hibernate映射了db结构.问题是，当我执行列表"操作时，框架会向我返回此错误:

I'm developing new web app with Struts2 framework, eclipse, and I've mapped the db structure with Hibernate. The problem is that when I execute my "list" action the framework returns me this error:

    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:

The server.xml is:

<?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>

我也有hibernate.cfg.xml

I've also 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>

有什么建议可以看的吗?我真的快要疯了！

Any suggestion where I can look? I'm really going crazy!

推荐答案

我找到了解决方案和实际问题.我在 Eclipse 中编辑 server.xml ，但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，但在 eclipse 视图中向我展示了该链接.因此，我整日忙于搜索，发现必须在 WEB-INF 目录下的 context.xml 文件中添加以下内容:

I found the solution, and the real problem. I edit the server.xml in Eclipse, and I didn't watch the real publish result. For strange reason eclipse remove the resource link in the real server.xml, but show me the link in eclipse view. So i gooogled all day long and I find that I must add in the context.xml file under WEB-INF directory this:

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

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