[java] How to upload a file and JSON data in Postman?

I am using Spring MVC and this is my method:

/**
* Upload single file using Spring Controller.
*/
@RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
public @ResponseBody ResponseEntity<GenericResponseVO<? extends IServiceVO>> uploadFileHandler(
            @RequestParam("name") String name,
            @RequestParam("file") MultipartFile file,
            HttpServletRequest request,
            HttpServletResponse response) {

    if (!file.isEmpty()) {
        try {
            byte[] bytes = file.getBytes();

            // Creating the directory to store file
            String rootPath = System.getProperty("catalina.home");
            File dir = new File(rootPath + File.separator + "tmpFiles");
            if (!dir.exists()) {
                dir.mkdirs();
            }

            // Create the file on server
            File serverFile = new File(dir.getAbsolutePath() + File.separator + name);
            BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(serverFile));
            stream.write(bytes);
            stream.close();

            System.out.println("Server File Location=" + serverFile.getAbsolutePath());

            return null;
        } catch (Exception e) {
            return null;
        }
    }
}

I need to pass the session id in postman and also the file. How can I do that?

1. Don't give any headers.
2. Put your json data inside a .json file.
3. Select your both files one is your .txt file and other is .json file for your request param keys.

Select [Content Type] from [SHOW COLUMNS] then set content-type of "application/json" to the parameter of json text.

Like this :

Body -> form-data -> select file

You must write "file" instead of "name"

Also you can send JSON data from Body -> raw field. (Just paste JSON string)

If you need like Upload file in multipart using form data and send json data(Dto object) in same POST Request

Get yor JSON object as String in Controller and make it Deserialize by adding this line

ContactDto contactDto  = new ObjectMapper().readValue(yourJSONString, ContactDto.class);

For each form data key you can set Content-Type, there is a postman button on the right to add the Content-Type column, and you don't have to parse a json from a string inside your Controller.

If somebody wants to send json data in form-data format just need to declare the variables like this

Postman:

As you see, the description parameter will be in basic json format, result of that:

{ description: { spanish: 'hola', english: 'hello' } }

The Missing Visual Guide

You must first find the nearly-invisible pale-grey-on-white dropdown for File which is the magic key that unlocks the Choose Files button.

After you choose POST, then choose Body->form-data, then find the File dropdown, and then choose 'File', only then will the 'Choose Files' button magically appear:

If somebody needed:

body -> form-data

Add field name as array

Use below code in spring rest side :

@PostMapping(value = Constant.API_INITIAL + "/uploadFile")
    public UploadFileResponse uploadFile(@RequestParam("file") MultipartFile file,String jsonFileVo) {
        FileUploadVo fileUploadVo = null;
        try {
            fileUploadVo = new ObjectMapper().readValue(jsonFileVo, FileUploadVo.class);
        } catch (Exception e) {
            e.printStackTrace();
        }

If you are using cookies to keep session, you can use interceptor to share cookies from browser to postman.

Also to upload a file you can use form-data tab under body tab on postman, In which you can provide data in key-value format and for each key you can select the type of value text/file. when you select file type option appeared to upload the file.

I needed to pass both: a file and an integer. I did it this way:

1. needed to pass a file to upload: did it as per Sumit's answer.

   Request type : POST

   Body -> form-data

   under the heading KEY, entered the name of the variable ('file' in my backend code).

   in the backend:

   file = request.files['file']

   Next to 'file', there's a drop-down box which allows you to choose between 'File' or 'Text'. Chose 'File' and under the heading VALUE, 'Select files' appeared. Clicked on this which opened a window to select the file.

2. needed to pass an integer:

went to:

Params

entered variable name (e.g.: id) under KEY and its value (e.g.: 1) under VALUE

in the backend:

id = request.args.get('id')

Worked!

If you want the Id and File in one object you can add your request object to a method as standard and then within Postman set the Body to form-data and prefix your keys with your request object name. e.g. request.SessionId and request.File.

Maybe you could do it this way:

At Back-end part

Rest service in Controller will have mixed @RequestPart and MultipartFile to serve such Multipart + JSON request.

@RequestMapping(value = "/executesampleservice", method = RequestMethod.POST,
consumes = {"multipart/form-data"})

@ResponseBody
public boolean yourEndpointMethod(
    @RequestPart("properties") @Valid ConnectionProperties properties,
    @RequestPart("file") @Valid @NotNull @NotBlank MultipartFile file) {
return projectService.executeSampleService(properties, file);
}

At front-end :

formData = new FormData();

formData.append("file", document.forms[formName].file.files[0]);
formData.append('properties', new Blob([JSON.stringify({
            "name": "root",
            "password": "root"                    
        })], {
            type: "application/json"
        }));

See in the image (POSTMAN request):

Click to view Postman request in form data for both file and json

Kindly follow steps from top to bottom as shown in below image.

At third step you will find dropdown of type selection as shown in below image

If you want to make a PUT request, just do everything as a POST request but add _method => PUT to your form-data parameters.

The way to send mulitpart data which containts a file with the json data is the following, we need to set the content-type of the respective json key fields to 'application/json' in the postman body tab like the following:

To send image along with json data in postman you just have to follow the below steps .

• Make your method to post in postman
• go to the body section and click on form-data
• provide your field name select file from the dropdown list as shown below
• you can also provide your other fields .
• now just write your image storing code in your controller as shown below .

postman :

my controller :

public function sendImage(Request $request)
{
    $image=new ImgUpload;  
    if($request->hasfile('image'))  
    {  
        $file=$request->file('image');  
        $extension=$file->getClientOriginalExtension();  
        $filename=time().'.'.$extension;  
        $file->move('public/upload/userimg/',$filename);  
        $image->image=$filename;  
    }  
    else  
    {  
        return $request;  
        $image->image='';  
    }  
    $image->save();
    return response()->json(['response'=>['code'=>'200','message'=>'image uploaded successfull']]);
}

That's it hope it will help you