How to identify what version jar is running under ColdFusion

问题

How can I update the jar files to the latest version which comes with coldfusion installation? I can see jar files, with different versions, under different locations. How can I confirm which version of the jar is currently running and what are the locations ColdFusion looks for these jars?

For example, in coldfusion\lib I have these jars:

• commons-collections.jar
• commons-collections.3.1.jar
• commons-collections.3.2.jar

Then in another location \Coldfusion\cfusion\lib, I have:

• commons-collections.jar

Thanks in advance for any help or suggestions.

回答1:

what are the locations coldfusion looks for these jars

Generally, ColdFusion searches the following locations for jars:

• ColdFusion Class Path (See ColdFusion Administrator > Server Settings > Java & JVM).
• Default JVM class path
• Dynamic paths specified in THIS.javaSettings (CF10+ only)

what version of the jar in currently running

Usually you can identify the source jar by picking a class likely to exists all versions of that library and checking it with Class.getResource(). For that specific library, CollectionUtils would probably be a good choice, since the API says it has existed since version 1.0.

 // Create instance
 testClass = createObject("java", "org.apache.commons.collections.CollectionUtils").getClass();
 // Convert class name to format:  /path/to/TheClassName.class 
 className = "/"& replace( testClass.name, ".", "/", "all") &".class";
 // Display location, or "null" if unknown
 location = testClass.getResource( className );
 writeOutput(  isNull(location) ? "null" : location.toString());

The results will obviously vary, but with my ColdFusion 11 install, the above returns:

org/apache/commons/collections/CollectionUtils.class jar:file:/c:/ColdFusion/cfusion/lib/commons-collections-3.2.1.jar!/org/apache/commons/collections/CollectionUtils.class

来源：https://stackoverflow.com/questions/35700231/how-to-identify-what-version-jar-is-running-under-coldfusion