javax.persistence.PersistenceException:没有名为tomcat的EntityManager的持久性提供程序
我试图在web应用程序中使用hibernate作为JPA实现。我花了几个小时处理这个问题。我有以下目录结构 下面是my persistence.xml的内容javax.persistence.PersistenceException:没有名为tomcat的EntityManager的持久性提供程序,java,hibernate,tomcat,jpa,intellij-idea,Java,Hibernate,Tomcat,Jpa,Intellij Idea,我试图在web应用程序中使用hibernate作为JPA实现。我花了几个小时处理这个问题。我有以下目录结构 下面是my persistence.xml的内容 <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instan
<?xml version="1.0" encoding="UTF-8"?>
<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_1_0.xsd"
version="1.0">
<persistence-unit name="myName" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:mysql://xxxxxxxx"/>
<property name="hibernate.connection.username" value="xxxxxxx"/>
<property name="hibernate.connection.password" value="xxxxxxx"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
我在Intellij IDEA工作。我以前有一个简单的Maven Hibernate项目,它可以工作,但在web应用程序中它似乎不起作用。我在尝试访问servlet时遇到了这样的异常
javax.persistence.PersistenceException: No Persistence provider for EntityManager named myName
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
controller.TestServlet.doGet(TestServlet.java:24)
javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
请!!!帮助解决这个问题。我必须工作,但由于这个问题无法继续。在servlet中通过dao访问数据库可能不正确,请建议正确的方法。你是我唯一的希望。你的类路径中有所有的hibernate jar吗,特别是hibernate-entitymanager-XXX。jar是的,当然,我的libs文件夹中有所有jar,反过来在WEB INFin映像中,文件夹名是MET-INF,应该是META-INF。我已经更改了它,它是在模块设置中设置的,所以这没关系。这没有帮助(请共享dao实现)。
javax.persistence.PersistenceException: No Persistence provider for EntityManager named myName
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
controller.TestServlet.doGet(TestServlet.java:24)
javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)