String classfile = this.getClass().getResource("/").getPath();
String key = request.getContextPath();
int indexof = classfile.lastIndexOf(key);
String filepath = classfile.substring(0, indexof) + "/upexcel/";
File uploadDir = new File(filepath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
}

    String realpath = "";

    // ServletContext ctx = request.getServletContext();// 获取上下文应用
    DiskFileItemFactory factory = new DiskFileItemFactory();// 自动导入类 使用工具 commons-fileupload
    File repository = new File(filepath); // (File) ctx.getAttribute("javax.servlet.context.tempdir");// 获取临时文件的存储路径
    factory.setRepository(repository);// 设置工程对象的仓库
    // String basePath = ctx.getRealPath("/res");// 设置存储路径
    // System.out.println(basePath);
    ServletFileUpload handler = new ServletFileUpload(factory);// 实例化 servletFileupload 上传
    handler.setFileSizeMax(1024 * 1024);
    try {
        List<FileItem> items = handler.parseRequest(request);
        for (FileItem item : items) {
            if (item.isFormField()) {
                System.out.print("非文件数据");
            } else {

                String fileName = new File(item.getName()).getName();
                int ivlast = fileName.lastIndexOf(".");
                fileName = "x" + System.currentTimeMillis() + fileName.substring(ivlast);
                realpath = filepath + fileName;
                File storeFile = new File(realpath);
                // 在控制台输出文件的上传路径
                // System.out.println(filePath);
                // realpath=filePath;
                // 保存文件到硬盘
                try {
                    item.write(storeFile);
                } catch (Exception e) {
                    realpath = e.getMessage();
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
        }
    } catch (FileUploadException e) {
        e.printStackTrace();
        realpath = e.getMessage();
    }
    List<Map<String, String>> objsList = getExcle(realpath);
    int ic = 0;
    if (objsList != null) {
        ic = objsList.size();
    }
    JsonObject objjson = new JsonObject();
    if (ic > 0) {

        Gson gson = new Gson();
        objjson.addProperty("count", ic);
        if (ic > 0) {
            objjson.addProperty("errmesg", "");
            objjson.add("webget", gson.toJsonTree(objsList));
        }
    } else {
        objjson.addProperty("count", -1);
        objjson.addProperty("errmesg", "表数据出错");
    }

    response.getWriter().append(objjson.toString());

}

List<Map<String, String>> getExcle(String xlsFilePath) {
    List<Map<String, String>> breList = new ArrayList<Map<String, String>>();
    InputStream ips;
    HSSFWorkbook wb;
    try {
        String stemString = "";

        ips = new FileInputStream(xlsFilePath);
        wb = new HSSFWorkbook(ips);
        HSSFSheet sheet = wb.getSheetAt(0);
        int iccc = 0;
        for (Iterator ite = sheet.rowIterator(); ite.hasNext();) {
            Map<String, String> matemMap = new HashMap<String, String>();

            int irow = 0;
            HSSFRow row = (HSSFRow) ite.next();
            if (iccc == 0) {
                row = (HSSFRow) ite.next();
            }
            iccc++;
            for (Iterator itet = row.cellIterator(); itet.hasNext();) {
                irow++;
                HSSFCell cell = (HSSFCell) itet.next();
                cell.setCellType(1);//强制转化字符串类型
                stemString =cell.getRichStringCellValue().toString().trim();
                matemMap.put("co" + irow, stemString);
            }

            breList.add(matemMap);
        }
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return null;
    }
    return breList;
}