为什么我得到java.lang.ClassNotFoundException:org.h2.Driver

Question

我正试图在karaf中部署一个捆绑包。我想在里面创建一个连接到h2数据库的进程引擎。我在pom.xml中有依赖项：

<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.190</version>
</dependency>

在ini()方法中，我尝试使用创建引擎进程

ProcessEngine processEngine = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration()
.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_FALSE)
.setJdbcUrl("jdbc:h2:mem:my-own-db;DB_CLOSE_DELAY=1000")
.setJobExecutorActivate(true)
.buildProcessEngine();

然而，在karaf控制台中，当我部署捆绑包时，我得到了错误：

Caused by: org.apache.ibatis.datasource.DataSourceException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: org.h2.Driver
at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.initializeDriver(UnpooledDataSource.java:179)
at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.getConnection(UnpooledDataSource.java:57)
at org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:349)
at org.apache.ibatis.datasource.pooled.PooledDataSource.getConnection(PooledDataSource.java:55)

Caused by: java.lang.ClassNotFoundException: org.h2.Driver
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.initializeDriver(UnpooledDataSource.java:173)

Answer 1

您能打印构建的MANIFEST吗？以及bundle的结果：headers我想你的捆绑包试图导入h2驱动程序，因为你没有将其设置为私有。

快速修复，在卡拉夫，运行bundle:install mvn:com.h2database/h2/1.4.199