我在Tomcat 7上使用Hibernate 4.0和JPA persistence.xml文件。没有Struts,只是直接使用一些Jersey服务的Hibernate。以下是我遇到的例外情况:
Caused by: org.hibernate.service.jndi.JndiException: Unable to lookup JNDI name [jdbc/MyDB]
at org.hibernate.service.jndi.internal.JndiServiceImpl.locate(JndiServiceImpl.java:68)
at org.hibernate.service.jdbc.connections.internal.DatasourceConnectionProviderImpl.configure(DatasourceConnectionProviderImpl.java:116)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:223)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:89)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2273)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2269)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1738)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
... 8 more
Caused by: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context
at org.apache.naming.NamingContext.lookup(NamingContext.java:820)
at org.apache.naming.NamingContext.lookup(NamingContext.java:154)
at org.apache.naming.SelectorContext.lookup(SelectorContext.java:135)
at javax.naming.InitialContext.lookup(InitialContext.java:396)
at org.hibernate.service.jndi.internal.JndiServiceImpl.locate(JndiServiceImpl.java:65)
... 23 more
我看到关于jbc的注释没有绑定在这个上下文中,但我很困惑这是如何发生的。我正在以特定于应用程序的context.xml中部署我的上下文:
<?xml version='1.0' encoding='utf-8'?>
<Context>
<Resource name="jdbc/MyDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="..." password="..." driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/mydb"/>
</Context>
我的persistence.xml文件如下所示:
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="com.example.mysql" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<non-jta-data-source>jdbc/MyDB</non-jta-data-source>
<class>...</class>
<properties>
<property name="hibernate.connection.datasource" value="jdbc/MyDB"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.id.new_generator_mappings" value ="true"/>
</properties>
</persistence-unit>
</persistence>
最后,我的web.xml文件的资源定义如下:
<!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>
<display-name>My Web Application</display-name>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/MyDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
...
</web-app>
至于我的布局,以下是我的war文件的结构:
app.war
+ META-INF
- context.xml
+ WEB-INF
+ classes
+ META-INF
- persistence.xml
+ lib
- web.xml
一些小调:
答案 0 :(得分:6)
由于你使用了一个可移植资源,你应该使用“java:comp / env / your_resource”调用你的JNDI,比如java:comp / env / jdbc / MyDB