问题xerces，xml-apis JDK1.4到JDK1.7

Question

First of all sorry if there is something like that but i haven´t found it, or at least i haven´t found a solution to my problem

I'm upgrading a project developed in jdk4 using libraries such as xml-apis, xerces or xercesImpl managed by Maven.

Now the new version is developed with jdk7 . Here is when troubles comes. When I pack the application everything it´s ok. If I use Tomcat it´s ok as well, but when I access to it by Weblogic the log says:

Class org.apache.xerces.parsers.AbstractSAXParser$AttributesProxy does not implement 
the requested interface org.xml.sax.Attributes

I´ve tried most of things but I don´t know how to solve it. Thanks in advance

Answer 1

Everything in xml-apis has been included in the core Java class library since Java 5, so you should exclude any transitive dependencies on xml-apis in your pom. The error message you're seeing tends to occur when you have different classloaders in the mix, with the xerces classes binding to interfaces from xml-apis but other code trying to cast them to the same interface as defined by rt.jar.