多个文件上传

<div class="easyui-layout" style="100%;height:100%;">
<div data-options="region:'west',split:true" style="100%;">
<form class="form-horizontal" id="fileform" name="fileform" method="post" enctype="multipart/form-data" action="applyLoans/submitphone" style="margin: 0;padding: 10px" >
<div class="col-md-12" style="margin-bottom: 20px">
<label class="easylabel lb-70" >选择文件<font color="#FF0000">*</font></label>
<input id="file_url" name="file_url" buttonText="选择文件" required="true" class="easyui-filebox" type="file" style="file 100%">
</div>
<input type="submit" value="sss"/>
</form>
</div>
</div>

/**
 * 封装上传方法
 *
 * @param request
 * @param loanId
 * @return
 * @throws Exception
 */
public Map<String, Object> upload(MultipartHttpServletRequest request, int loanId) throws Exception {
    String filePath = "";
    String osskey = "";
    Map<String, Object> map = new HashMap<>();
    //提取上传文件
    Map<String, MultipartFile> files = request.getFileMap();
    //判断是否含有文件上传控件
    if (files.size() > 0) {
        //定义可以上传文件的类型
        List<String> filelimit = Arrays.asList("jpg", "gif", "png");
        Map<String, String> filelimitmap = new HashMap<>();
        filelimit.forEach((s) -> filelimitmap.put(s, s));
        Set<String> keys = files.keySet();
        //遍历集合
        for (String key : keys) {
            //判断为多文件上传
            List<MultipartFile> fileList = request.getFiles(key);
            //判断是否有文件
            if (fileList.size() == 0) {
                continue;
            }
            StringBuilder str = new StringBuilder();
            String filename = "";
            //遍历集合上传文件
            for (MultipartFile file : fileList) {
                //判断是否有文件
                if (file.getOriginalFilename().length() <= 1) {
                    continue;
                }
                int id = 0;
                //判断是否为限制的文件格式
                filename = file.getOriginalFilename();
                int lastIndexOf = filename.lastIndexOf(".");
                String s = filename.substring(lastIndexOf + 1);
                if (filelimitmap.get(s) == null) {
                    continue;
                }
                //1.放oss上返回key
                osskey = OSS.uploadImage(file.getInputStream());
                //2.放sftp返回一个路径 再存入file_data
                filePath = SFTP.addFile(file.getInputStream(), loanId, file.getOriginalFilename(), osskey);
                map.put("osskey", osskey);   //阿里云oss key
                map.put("filePath", filePath);   //sftp返回的路径
                map.put("fileName", filename);
                map.put("ext", s);
                id = adminDao.submitFileData(map);
                System.out.println("返回的id" + id);
                str.append(id + ",");
            }
            String strid = "" + str;
            map.put(key, strid);
        }
    }
    return map;
}