【发布时间】:2014-07-12 23:29:22
【问题描述】:
我正在使用 maven 创建一个 OpenJPA 应用程序。 应用程序启动,但如果我尝试访问数据库实体,则会收到以下异常:
HTTP Status 500 - <openjpa-2.2.2-r422266:1468616 fatal user error> org.apache.openjpa.persistence.ArgumentException: The persistence provider is attempting to use properties in the persistence.xml file to resolve the data source. A Java Database onnectivity (JDBC) driver or data source class name must be specified in the openjpa.ConnectionDriverName or javax.persistence.jdbc.driver property. The following properties are available in the configuration: "org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl@442ce698".
persistence.xml 位于 META-INF 中,由 Netbeans 8 控制。 ConnectionDriverName 设置如下:
<property name="openjpa.ConnectionDriverName" value="org.apache.commons.dbcp.BasicDataSource"/>
我的 src\main\java\META-INF\persistence.xml(类标签减少,数据库设置改变):
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="PersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<class>com.example.test.my.entities.User</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema"/>
<property name="openjpa.Log" value="DefaultLevel=INFO, Tool=INFO, SQL=TRACE"/>
<property name="openjpa.jdbc.DBDictionary" value="org.apache.openjpa.jdbc.sql.MySQLDictionary"/>
<property name="openjpa.ConnectionDriverName" value="org.apache.commons.dbcp.BasicDataSource"/>
<property name="openjpa.ConnectionFactoryProperties" value="PrettyPrint=true, PrettyPrintLineLength=80, PrintParameters=true"/>
<property name="openjpa.ConnectionProperties" value="DriverClassName=com.mysql.jdbc.Driver,
Url=jdbc:mysql://localhost:3306/database?autoReconnect=true,
Username=usr,
Password=pwd,
MaxWait=60000,
TestOnBorrow=true,
validationQuery=select 1"/>
</properties>
</persistence-unit>
</persistence>
我使用的是 Tomcat 8(Tomcat 7 或 Tomee 的结果相同)。
【问题讨论】:
-
编辑问题并添加persistence.xml文件。
-
完成。 :) 提前感谢
-
发布完整的堆栈跟踪。
标签: java tomcat netbeans openjpa