dom4j生成xml有关问题~

dom4j生成xml问题~ 高手进~
[code=Java][/code]
  Document doc = org.dom4j.DocumentHelper.createDocument();
Element process = doc.addElement("process");
process.addAttribute("xmlns", "http://drools.org/drools-5.0/process");
process.addAttribute("xmlns:xs", "http://www.w3.org/2001/XMLSchema-instance");
process.addAttribute("xs:schemaLocation", "http://drools.org/drools-5.0/process drools-processes-5.0.xsd");

生成的结果是：
[code=XML][/code]
<process xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:schemaLocation="http://drools.org/drools-5.0/process drools-processes-5.0.xsd">
</process>

我想要的结果是：
[code=XML][/code]
<process xmlns="http://drools.org/drools-5.0/process"
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
xs:schemaLocation="http://drools.org/drools-5.0/process drools-processes-5.0.xsd">
</process>


------解决方案--------------------

Java code

        Document doc = DocumentHelper.createDocument();
        Element root = doc.addElement("process");
        Element ns = root.addNamespace("","http://drools.org/drools-5.0/process");
        Element xs = root.addNamespace("xs","http://www.w3.org/2001/XMLSchema-instance");
        Element sl = root.addAttribute("xs:schemaLocation","http://drools.org/drools-5.0/process drools-processes-5.0.xsd");