class12.jar和ojdbc14.jar区别

于 2013-08-29 15:39:13 发布 · 569 阅读

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#java #数据库

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本文介绍了解决Oracle数据库连接异常的方法，特别是在UTF8和UCS2转换失败的情况。通过更换不同版本的Oracle JDBC驱动（如从class12.jar更改为ojdbc14.jar），可以有效解决这一问题。文章还详细解释了class12.jar和ojdbc14.jar的区别，包括它们适用的JDK版本和Oracle版本。

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测试环境正常的程序，到生产出如下错误

java.sql.SQLException: 不能在 UTF8 和 UCS2 之间转换: failUTF8Conv

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)

后来发现是oracle驱动的事，使用ojdbc14.jar解决问题。class12.jar和ojdbc14.jar有何区别。

class12.jar用于JDK1.2，1.3中，虽然在1.4，1.5中使用一般情况是没有问题的，但由于环境的变化可能出现未知的错误，这点本人深有体会。

ojdbc14.jar用于JDK1.4及其以上版本

另外二者和Oracle的版本也有关系。

在Oracle官方文档中说道：

JDBC Thin for All Platforms

classes12.jar (1,600,090 bytes) - for use with JDK 1.2 and JDK 1.3

classes12_g.jar (2,044,594 bytes) - same as classes12.jar, except that classes were compiled with "javac -g" and contain some tracing information.

classes12dms.jar (1,607,745 bytes) - same as classes12.jar, except that it contains additional code`to support Oracle Dynamic Monitoring Service.

classes12dms_g.jar (2,052,968 bytes) - same as classes12dms.jar except that classes were compiled with "javac -g" and contain some tracing information.

ojdbc14.jar (1,545,954 bytes) - classes for use with JDK 1.4 and 1.5

ojdbc14_g.jar (1,938,906 bytes) - same as ojdbc14.jar, except that classes were compiled with "javac -g" and contain some tracing information.

ojdbc14dms.jar (1,553,561 bytes) - same as ojdbc14.jar, except that it contains additional code`to support Oracle Dynamic Monitoring Service.

ojdbc14dms_g.jar (1,947,136 bytes) - same as ojdbc14dms.jar, except that classes were compiled with "javac -g" and contain some tracing information.

orai18n.jar (1,645,114 bytes) - NLS classes for use with JDK 1.2, 1.3, 1.4, and 1.5. This jar file replaces the old nls_charset jar/zip files.

ons.jar (48,492 bytes) - for use by the pure Java client-side Oracle Notification Services (ONS) deamon.

demo.tar (604,160 bytes) or demo.zip (529,267 bytes) - contains sample JDBC programs.