正则表达式替换非法格式xml

非法xml的格式，标签中有数字：

<?xml version="1.0" encoding="UTF-8"?>
<book>
	<1 type="abc">
		<price></price>
	</1>
	<2 type="abc">
		<price></price>
	</2>
	<3 type="abc">
		<price></price>
	</3>
</book>

考虑用正则表达式替换，给每个数字加上一个后缀

@RequestMapping("/importXML")
    public ModelAndView importXML(HttpServletRequest request, HttpServletResponse response)
    {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request;
        
        // 获取服务器上下文路径
        String path = request.getSession().getServletContext().getRealPath("/file");
        
        // 创建文件存放路径
        File folder = new File(path);
        if (!folder.exists())
        {
            folder.mkdirs();
        }
        
        // 获取上传的文件
        MultipartFile multiFile = multipartRequest.getFile("file");
        String fname = multiFile.getOriginalFilename();
        String suffix = fname.substring(fname.lastIndexOf("."));
        String fileName = path + "/" + UUID.randomUUID().toString() + suffix;
        
        File file = new File(fileName);
        
        try
        {
            // 写文件到服务器
            multiFile.transferTo(file);
        }
        catch (IllegalStateException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        
        try
        {
            String temp = null;
            StringBuffer sb = new StringBuffer();
            FileInputStream fileIn = new FileInputStream(file);
            InputStreamReader bufferInputStr = new InputStreamReader(fileIn);
            BufferedReader bufferedReader = new BufferedReader(bufferInputStr);
            while ((temp = bufferedReader.readLine()) != null)
            {
                
                sb.append(temp);
            }
            
            String tempStr = sb.toString();
            
            //正则表达式过滤后的字符串
            String firstTempStr = "";
            
            //替换所有数字开始的标签
            firstTempStr = tempStr.replaceAll("\\<(?=\\d)", "<" + Global.TEMP);
            firstTempStr = firstTempStr.replaceAll("\\</(?=\\d)", "</" + Global.TEMP);
            
            Document doc = DocumentHelper.parseText(firstTempStr);
            int i = importService.importXML(doc.getRootElement().element("InternetGatewayDevice"));
            if(1 == i){
                request.setAttribute("msg", "文件导入成功。");
            }else{
                request.setAttribute("msg", "文件导入失败。");
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return new ModelAndView("config/import_xml");
    }