在spring用jndi得到tomcat中的datasource的问题
今天想把项目中配置在spring中的数据源移到tomcat中来配置，遇见了一些问题，请各位指教，小弟感谢了。目的：从spring中得到tomcat中配置的datasource。
我的做法：
在tomcat的context.xml文件中GlobalNamingResources标签中加入如下代码：
<Resource
name="dataSource"
type="javax.sql.DataSource"
password="54mwr"
driverClassName="org.postgresql.Driver"
maxIdle="3"
maxWait="5000"
username="alemis"
url="jdbc:postgresql://localhost:5432/alemis_dev"
maxActive="10"/>
在tomcat的context.xml文件中Host标签中加入如下代码：
<Context path="/pro" privileged="true"
docBase="E:/work2/alemis2/target/pro">
</Context>
在项目的web.xml文件的最后面加了如下代码:
<resource-ref>
<res-ref-name>dataSource</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
然后在spring的application.xml文件中如下引用：
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName">
<value>java:comp/env/dataSource</value>
</property>
</bean>
我启动tomcat的时候出现了如下错误：
2008-12-09 15:34:29,252 WARN Thread-1 hibernate.cfg.SettingsFactory Could not obtain connection metadata
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:780)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
at $Proxy0.getConnection(Unknown Source)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:82)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2073)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1298)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:814)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:732)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1367
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