DBunit生成java.lang.ClassCastException:尝试加载CLOB字段时,java.lang.String无法强制转换为oracle.sql.CLOB

Question

我在Oracle 11GR2上使用最新版本的DBUnit(2.4.7).我正在使用Java 6(1.6.0_15)和最新版本的Oracle客户端jar(jdbc6.jar)

我无法将XML文件中CLOB Oracle字段引用的任何数据成功加载到数据库中.

我已经使用了各种版本的组合:

• Oracle JDBC库ojdbc5.jar,ojdbc6.jar,oracle 10 jars

• Hibernate库等...我认为问题出在DBUnit上.请参阅下面的堆栈跟踪.

  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-core</artifactId>
  <version>3.5.0-CR-2</version>
  

  和

  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-entitymanager</artifactId>
  <version>3.4.0.GA</version>
  

我正在运行Java 6,1.6.0_15.

我试过了:

1)使用此定义的FlatXmlDataSet

<MESSAGE msg_id="1" mtp_id="1" msg_detail="asadds" />

2)使用此定义的XmlDataSet

<table name="MESSAGE">
    <column>MSG_ID</column>
    <column>MTP_ID</column>
    <column>MSG_DETAIL</column>
    <row>
        <value>1</value>
        <value>1</value>
        <value>dsad</value>
    </row>
</table>

任何帮助将非常感激!

堆栈跟踪如下:

        at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:980)
ERROR [10032010 14:15:13,031] - exception creating EntityManager:  [] (MessageDAOTest.java:97)
java.lang.RuntimeException: Exception in JpaDBTestCase
        at com.ert.commons.junit4.hibernate.JpaDBTestCase.loadDbunitFiles(JpaDBTestCase.java:97)
        at com.ert.ertmon.dao.ejb.impl.MessageDAOTest.setUpBeforeClass(MessageDAOTest.java:94)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
        at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
        at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
        at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
        at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
        at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:334)
        at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:980)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to oracle.sql.CLOB
        at oracle.jdbc.driver.OraclePreparedStatement.setObjectCritical(OraclePreparedStatement.java:7898)
        at oracle.jdbc.driver.OraclePreparedStatement.setObjectInternal(OraclePreparedStatement.java:7511)
        at oracle.jdbc.driver.OraclePreparedStatement.setObject(OraclePreparedStatement.java:7984)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.setObject(OraclePreparedStatementWrapper.java:237)
        at org.dbunit.dataset.datatype.ClobDataType.setSqlValue(ClobDataType.java:71)
        at org.dbunit.database.statement.SimplePreparedStatement.addValue(SimplePreparedStatement.java:73)
        at org.dbunit.database.statement.AutomaticPreparedBatchStatement.addValue(AutomaticPreparedBatchStatement.java:63)
        at org.dbunit.operation.AbstractBatchOperation.execute(AbstractBatchOperation.java:186)
        at org.dbunit.AbstractDatabaseTester.executeOperation(AbstractDatabaseTester.java:190)
        at org.dbunit.AbstractDatabaseTester.onSetup(AbstractDatabaseTester.java:103)
        at com.ert.commons.junit4.hibernate.JpaDBTestCase.loadDbunitFile(JpaDBTestCase.java:136)
        at com.ert.commons.junit4.hibernate.JpaDBTestCase.loadDbunitFiles(JpaDBTestCase.java:92)
        ... 21 more

Answer 1

这看起来像Bug ID 1984596，我不太了解状态（它已关闭，但是......我不知道问题是否已得到解决）。您能否按照问题中的建议尝试使用 DbUnit 2.2.1（似乎是版本 2.2.2 中引入的更改导致了该问题）。如果这有效，您绝对应该重新打开该问题。