elem.setAttribute("resource", "sqlMap.xml");
      sqlMapElem.item(0).appendChild(elem);
      
      Transformer trans = TransformerFactory.newInstance().newTransformer(); 
      File tempFile = File.createTempFile("sqlMapConfig", ".xml");
      tempFile.deleteOnExit();
      trans.transform(new DOMSource(doc),new StreamResult(tempFile));
      
      //从临时的配置文件中初始化sqlMapClient
      input = new FileInputStream(tempFile);
      SqlMapClientHolder.sqlMapClient = SqlMapClientBuilder