读取xml

            /*读取header*/
        	HashMap xmlMap = new HashMap();      
        	xmlMap.put("plugins","http://www.abc.com");
        	XPath x = configDOC.createXPath("/plugins:buyenvelop/plugins:header");   
        	x.setNamespaceURIs(xmlMap);
            Element headElement = (Element)x.selectSingleNode(configDOC); 
            if(headElement==null)
            {
            	Exception e = new Exception("没有找到buyenvelop/header结点");
            	logFunction.error(e);
            }
            bf.append(headElement.getStringValue());

        	x = configDOC.createXPath("/plugins:buyenvelop/plugins:header/plugins:sellersingtype");   
        	x.setNamespaceURIs(xmlMap);
            Element sellersingtypeNode = (Element)x.selectSingleNode(configDOC); 
            if(sellersingtypeNode==null)
            {  
            	Exception e = new Exception("没有找到buyenvelop/header/sellersingtype结点");
            	logFunction.error(e);

            }
            String sellersingtype = sellersingtypeNode.getStringValue();