使用JAX-WS 2.1时请求XML中不必要的属性

Question

I'm using JAX-WS 2.1 (uses JAXB 2.1) under WAS7.0 app server. I've written a client code and below is the snippet from my request xml.

      <additionalCriteria>
         <ns5:keyword xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
         <ns5:maxResultsToReturn>10</ns5:maxResultsToReturn>
         <ns5:nextResultBlockKey xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
         <ns5:scope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
         <ns5:sortBy xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
         <ns5:sortOrder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
      </additionalCriteria>

As you can see, the attribute xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" is getting added to each element. I dont want this in my request. Can any one suggest please as it is blocking my project delivery?

Answer 1

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" is necessary in case there are any nillable fields with null values down in the depths of the message. The JAX-B spec requires these to be represented with xsi:nil. JAX-WS/JAX-B cannot possibly predict if there are any of these, since it streams out the XML while walking the tree. So it always adds that namespace. It is standard, normal, and anyone who objects needs to rethink.