Question

我创建了maven web项目。现在我想通过昆德拉图书馆连接Cassandra。

我将persistence.xml保存在Pages文件夹中。但我收到以下错误：

src/main/resources/META-INF/

这意味着它只缺少javax.persistence.PersistenceException: No Persistence provider for EntityManager named testing javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89) javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60) kundera.ConnectServlet.connect(ConnectServlet.java:56) kundera.ConnectServlet.doGet(ConnectServlet.java:34) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)吗？

我的persistence.xml文件包含：

persistence.xml

我的Java代码是：

<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="testing">
    <provider>com.impetus.kundera.KunderaPersistence</provider>     
    <properties>            
        <property name="kundera.nodes" value="localhost"/>
        <property name="kundera.port" value="9160"/>
        <property name="kundera.username" value="cassandra" />
        <property name="kundera.password" value="cassandra" />
        <property name="kundera.keyspace" value="cma"/>
        <property name="kundera.dialect" value="cassandra"/>
        <property name="kundera.ddl.auto.prepare" value="create" />
        <property name="kundera.ddl.auto.prepare" value="update" />
        <property name="kundera.client.lookup.class" value="com.impetus.client.cassandra.thrift.ThriftClientFactory" />         
    </properties>
</persistence-unit>
</persistence>

那么，对此有什么正确的解决方案？

在Maven Web应用程序中保留persistence.xml的正确位置

0 个答案: