Upload multiple files

<div class="easyui-layout" style="width:100%;height:100%;">
<div data-options="region:'west',split:true" style="width: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="filewidth: 100%">
</div>
<input type="submit" value="sss"/>
</form>
</div>
</div>

/ ** 
* Upload packaging method 
* 
* @param Request 
* @param LoanID 
* @return 
* @throws Exception 
* / 
public the Map <String, Object> Upload (a MultipartHttpServletRequest Request, int LoanID) throws Exception { 
    String filePath = ""; 
    String = osskey ""; 
    the Map <String, Object> = new new Map the HashMap <> (); 
    // extract upload 
    the Map <String, a MultipartFile> files = request.getFileMap (); 
    // file upload control comprising determining whether 
    if (files .size ()> 0) { 
        // definition can upload files of type 
        List <String> filelimit = Arrays.asList ( "JPG", "GIF", "PNG"); 
        the Map <String, String> = new new filelimitmap the HashMap < > ();
        filelimit.forEach((s) -> filelimitmap.put(s, s));
        SET <String> = files.keySet Keys (); 
        // iterate set 
        for (String Key: Keys) { 
            // is determined for multiple file upload 
            List <a MultipartFile> = request.getFiles the fileList (Key); 
            // file to determine whether there 
            if (fileList.size () == 0) { 
                Continue; 
            } 
            the StringBuilder the StringBuilder new new STR = (); 
            String filename = ""; 
            // uploaded through the collection 
            for (a MultipartFile file: the fileList) { 
                // if the file is determined 
                if (. file.getOriginalFilename () length () <=. 1) { 
                    Continue; 
                } 
                int ID = 0;
                // determines whether the file format of limitation 
                filename = file.getOriginalFilename (); 
                int lastIndexOf = filename.lastIndexOf ( "."); 
                String = filename.substring S (+ lastIndexOf. 1); 
                IF (filelimitmap.get (S) = null =) { 
                    Continue; 
                } 
                // return oss. 1 put on the Key. 
                osskey = OSS.uploadImage (file.getInputStream ()); 
                . 2 // return a discharge path is stored again sftp file_data 
                filePath = SFTP.addFile (File. getInputStream (), LoanID, file.getOriginalFilename (), osskey); 
                map.put ( "osskey", osskey); // Ali cloud Key oss 
                map.put ( "filePath", filePath); // sftp return path
                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;
}