Test :

public static void main(String[] args) {

     MultipartFileUploader fu = new MultipartFileUploader("http://localhost:9093/api/dealer/uploadTest");
     //@formatter:off
     
     fu
         .header("Header-Test", "Header Value")
         .params("name", "Sheik Mohideen")
         .params("age", "40")
         .file("file_content[]", new File("d:/diagram.png"))
         .file("file_content[]", new File("d:/diagram2.png"))
         .file("photo", new File("d:/diagram2.png"))
         .upload();
         
         
     //@formatter:on

 }
 ```
 
-----------------------------------

Receiver : 

 @RequestMapping(value = "/uploadTest", method = RequestMethod.POST)
 public @ResponseBody Response uploadTest(MultipartHttpServletRequest req) throws ApiException {

     System.out.println("Parameter---------------");
     for (Entry<String, String[]> h : req.getParameterMap().entrySet()) {
         System.out.println(h.getKey() + " - " + h.getValue());
     }

     System.out.println("Header-----------------");
     for (Entry<String, List<String>> h : req.getRequestHeaders().entrySet()) {
         System.out.println(h.getKey() + " - " + h.getValue());
     }

     System.out.println("Files------------------");
     for (Entry<String, List<MultipartFile>> h : req.getMultiFileMap().entrySet()) {
         System.out.println(h.getKey() + " - " + h.getValue().size());

         for (MultipartFile t : h.getValue()) {
             System.out.println(t.getName() + " - " + t.getOriginalFilename());
         }
     }

     System.out.println("Done----------------------");
     
     return Response.success();
 }