Web Services :: SOAP Header Code

I'm developing a SOAP client and have used wsimport to generate the classes, etc. and all is going pretty well, but the server requires several headers that I've been coding up manually, specifically wise:Security and o:Security blocks. While this is a valid approach, I think I'm probably doing things the hard way and I know .NET (SOAP being an MS standard originally) has some really powerful code to generate these headers. Does java have any similar counterparts? As an example, I'm writing code like the following:

SOAPElement token = securityElement.addChildElement("UsernameToken", "o");
token.addAttribute(soapFactory.createName("u:Id"), "UsernameToken-1");
SOAPElement userToken = token.addChildElement("Username", "o");
userToken.addTextNode(user);

[code]...