Tomcat 7.0 for Hibernate中的数据源JNDI配置

Question

当在（tomcat 7）server.xml或Context.xml中配置数据源时，hibernate无法识别JNDI并抛出异常，但是当我尝试在代码中使用JNDI访问数据源时，它工作正常。 怎么了

下面是我在hibernate.properties中的配置

hibernate.connection.driver_class com.mysql.jdbc.Driver
hibernate.connection.pool_size 10
hibernate.dialect org.hibernate.dialect.MySQL5Dialect
hibernate.connection.datasource java:comp/env/jdbc/employee
hibernate.show_sql true
hibernate.format_sql true

在server.xml中

 <Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="true">

    <!-- SingleSignOn valve, share authentication between web applications
         Documentation at: /docs/config/valve.html -->
    <!--
    <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
    -->

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html
         Note: The pattern used is equivalent to using pattern="common" -->
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
           prefix="localhost_access_log." suffix=".txt"
           pattern="%h %l %u %t &quot;%r&quot; %s %b" resolveHosts="false"/>
    **<Context docBase="hibernate" path="/hibernate">
            <Resource name="jdbc/employee" auth="Container"
          type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost:45000/hibernatetest"
          username="user" password="hibernate" maxActive="20" maxIdle="10"
          maxWait="-1" removeAbandoned="true" removeAbandonedTimeout="60" logAbandoned="true"/>
        </Context>**
  </Host>

在Context.xml文件中

    **<Context docBase="hibernate" path="/hibernate">
        <Resource name="jdbc/employee" auth="Container"
          type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost:45000/hibernatetest"
          username="user" password="hibernate" maxActive="20" maxIdle="10"
          maxWait="-1" removeAbandoned="true" removeAbandonedTimeout="60" logAbandoned="true"/>
    </Context>**

最后是我的web.xml文件

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE web-app PUBLIC
    "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">
    **<web-app >
        <servlet>
            <servlet-name>employee</servlet-name>
            <servlet-class>edu.experiments.web.EmployeViewer</servlet-class>
        </servlet>
        <servlet-mapping>
            <servlet-name>employee</servlet-name>
            <url-pattern>/employee</url-pattern>        
        </servlet-mapping>

        <resource-ref>
            <description>DB Connection</description>
            <res-ref-name>jdbc/employee</res-ref-name>
            <res-type>javax.sql.DataSource</res-type>
            <res-auth>Container</res-auth>
        </resource-ref>
    </web-app>**


org.hibernate.service.jndi.JndiException: Unable to lookup JNDI name [java:comp/env/jdbc/employee]

Answer 1

它比看起来更简单：

1. 不要在您的web.xml中添加有关JNDI的任何内容
2. 在您使用的context.xml中（无论是全局的还是webapp的）使用正确的名称，例如“ jdbc / employee”
3. 休眠配置，以“ java：comp / env / jdbc / employee”的形式传递名称

这是参考页：

http://tomcat.apache.org/tomcat-7.0-doc/jndi-datasource-examples-howto.html