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JSP How to Invoke the Specific version of Xerces-J

JSP How to Invoke the Specific version of Xerces-J# Java - 爪哇娇娃

C*r2010-01-18 08:01

1 楼

Our server has different versions of Xerces-J installed, from 1.9 to 2.8
My project has to use Xerces-J 2.8 and I have Xerces-J.2.8.jar under my
project /WEB-INF/lib
How can I make my project invoke /WEB-INF/lib/ 2Xerces-J.2.8.jar without
changing system's classpath?

r*l2010-01-18 08:01

2 楼

In one sentence: you should not put xerces.jar in classpaths
that are loaded by the web application's parent classloader.
It should not be put in the java ext library path, $CLASSPATH,
web/app servers common lib, domain lib and maybe more. If
other apps need to use this jar, they should have their own.

【在 C**********r 的大作中提到】

: Our server has different versions of Xerces-J installed, from 1.9 to 2.8
: My project has to use Xerces-J 2.8 and I have Xerces-J.2.8.jar under my
: project /WEB-INF/lib
: How can I make my project invoke /WEB-INF/lib/ 2Xerces-J.2.8.jar without
: changing system's classpath?

t*e2010-01-18 08:01

3 楼

It depends on how classloader is implemented by the web server. For example,
WebLogic allows you to specify from which classloader you want to load the
jar.

m*t2010-01-18 08:01

4 楼

Configure your appserver so that the web app classloader will only ask
the parent classloader if it can't find a resource by itself. Note that
that is the opposite of the java classloading delegation protocol.

【在 C**********r 的大作中提到】