我pom.xml
{取自http://struberg.wordpress.com/2012/05/10/using-jpa-in-real-projects-part-1/):
<properties>
<openjpa.sql.action>refresh</openjpa.sql.action>
<database.driver.name>org.postgresql.Driver</database.driver.name>
<database.connection.url>jdbc:postgresql://myURL</database.connection.url>
<database.user>user</database.user>
<database.password>password</database.password>
</properties>
<plugin>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-maven-plugin</artifactId>
<version>${openjpa-version}</version>
<configuration>
<includes>**/entity/*.class</includes>
<excludes>**/entity/Q*.class</excludes>
<addDefaultConstructor>true</addDefaultConstructor>
<enforcePropertyRestrictions>true</enforcePropertyRestrictions>
<sqlAction>${openjpa.sql.action}</sqlAction>
<connectionDriverName>${database.driver.name}</connectionDriverName>
<connectionProperties>
jdbcUrl=${database.connection.url},
user=${database.user},
password=${database.password},
</connectionProperties>
</configuration>
<executions>
<execution>
<id>enhancer</id>
<phase>process-classes</phase>
<goals>
<goal>enhance</goal>
<goal>sql</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-all</artifactId>
<version>${openjpa-version}</version>
</dependency>
</dependencies>
</plugin>
由于某种原因,URL未正确传递,我得到了
目标org.apache.openjpa的执行增强器:openjpa-maven-plugin:2.2.0:sql failed:无法获取驱动程序类“org.postgresql.Driver”和URL“null”的连接。您可能指定了无效的网址。 (org.apache.openjpa:OpenJPA的-行家-插件:2.2.0:SQL:增强剂:过程类)
我尝试用jdbcUrl
,connectionProperties
等替换url
中的URL
。没有任何帮助。但是,我可以将网址放在persistence.xml
中,而 可以工作:
<property name="javax.persistence.jdbc.url"
value="jdbc:postgresql://myURL" />
从Maven属性获取驱动程序,用户和密码。但是,由于此URL仅用于生成DDL(数据源是在运行时以不同的方式创建的),因此我更愿意将其放在pom.xml
中,而不会污染persistence.xml
。有没有办法做到这一点?
答案 0 :(得分:2)
我使用commons-dbcp BasicDataSource
来获取这样的连接:
<connectionDriverName>org.apache.commons.dbcp.BasicDataSource</connectionDriverName>
<connectionProperties>
driverClassName=${database.driver.name},
url=${database.connection.url},
username=${database.user},
password=${database.password},
</connectionProperties>