- ojdbc6.jar
Classes for use with JDK 1.6. It contains the JDBC driver classes
except classes for NLS support in Oracle Object and Collection
types.
- ojdbc6_g.jar
Same as ojdbc6.jar except compiled with "javac -g" and contains
tracing code.
- ojdbc6dms.jar
Same as ojdbc6.jar, except that it contains instrumentation to
support DMS and limited java.util.logging calls.
- ojdbc6dms_g.jar
Same as ojdbc6_g.jar except that it contains instrumentation to
support DMS.
Note: The dms versions of the jar files are the same as
standard jar files, except that they contain additional code
to support Oracle Dynamic Monitoring Service. They contain a
limited amount of tracing code. These can only be used
when dms.jar is in the classpath. dms.jar is provided as part of
Oracle Application Server releases. As a result the dms versions
of the jar files can only be used in an Oracle Application Server
environment.
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原文：http://www.cnblogs.com/wk022/p/3842221.html