java 下载Excel模板

前端：

JSP：

<div id="insertBtn" class="MyCssBtn leftBtn" onclick="download();"><span>测试下载</span></div>

JS:

function excelOut(){
    var url = basePath+"/meals/excelOut";  //mybatis+spring
    url = encodeURI(url);
    location.href = url;
}

后台：

Controllor：

@RequestMapping( value = "/excelOut")
     public void excelStandardTemplateOut(HttpServletRequest request,
            HttpServletResponse response) throws IOException{
         URL save = Thread.currentThread().getContextClassLoader().getResource("");
         String str =     save.toString();
         str=str.substring(6,str.length());
         str=str.replaceAll("%20", " ");
         int num = str.lastIndexOf("wgbs");　　　　//wgbs 为项目名，应用到不同的项目中，这个需要修改！
         str=str.substring(0, num+"wgbs".length());
         str = str +"/demo/template.xlsx";　　　　//Excel模板所在的路径。
         File f = new File(str);
          // 设置response参数，可以打开下载页面
        response.reset();
        response.setContentType("application/vnd.ms-excel;charset=utf-8");
        try {
            response.setHeader("Content-Disposition", "attachment;filename="+ new String(("泊位信息标准模板" + ".xlsx").getBytes(), "iso-8859-1"));　　　　//下载文件的名称
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        ServletOutputStream out = response.getOutputStream();
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        try {
            bis = new BufferedInputStream(new FileInputStream(f));
            bos = new BufferedOutputStream(out);
            byte[] buff = new byte[2048];
            int bytesRead;
            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);
            }
        } catch (final IOException e) {
            throw e;
        } finally {
            if (bis != null)
                bis.close();
            if (bos != null)
                bos.close();
        }
 }

项目目录（注意模板所在路径位置）：