Java 在使用persistence.xml时将Hibernate 4.0与Tomcat 7一起使用时出现JndiException
我正在Tomcat7上使用Hibernate4.0和JPA persistence.xml文件。没有Struts,只是通过一些Jersey服务直接休眠。以下是我遇到的一个例外:Java 在使用persistence.xml时将Hibernate 4.0与Tomcat 7一起使用时出现JndiException,java,hibernate,tomcat,jpa,jndi,Java,Hibernate,Tomcat,Jpa,Jndi,我正在Tomcat7上使用Hibernate4.0和JPA persistence.xml文件。没有Struts,只是通过一些Jersey服务直接休眠。以下是我遇到的一个例外: Caused by: org.hibernate.service.jndi.JndiException: Unable to lookup JNDI name [jdbc/MyDB] at org.hibernate.service.jndi.internal.JndiServiceImpl.locate(Jnd
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
一些小提示:
- 使用全局上下文与特定于应用程序的上下文没有区别
- 试图实例化EntityManager实例的代码位于lib目录(多项目Maven构建的一部分)的JAR文件中,但持久性XML位于主web应用程序中,如上所述
- 我可以在Tomcat中看到JNDI数据源,并且可以使用查询它,即,我可以访问连接信息并成功地对数据源执行SQL查询
<?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>
<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>
<!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>
app.war
+ META-INF
- context.xml
+ WEB-INF
+ classes
+ META-INF
- persistence.xml
+ lib
- web.xml