How to Upload a File and JSON Data Simultaneously in a Jersey RESTful Web Service?

File Upload Along with Other Object in Jersey RESTful Web Service

Problem:

You want to create an employee record with image and employee data in a single REST API call using Jersey, but the current implementation raises an error in Chrome Postman.

Answer:

To enable simultaneous file upload and JSON data transmission, the JSON data must be included in the multipart request. Here's a modified version of your code snippet:

@POST
@Path("/upload2")
@Consumes({MediaType.MULTIPART_FORM_DATA})
public Response uploadFileWithData(
        @FormDataParam("file") InputStream fileInputStream,
        @FormDataParam("file") FormDataContentDisposition contentDispositionHeader,
        @FormDataParam("emp") Employee emp) {

//..... business login

}

The key change is the addition of @FormDataParam("emp") to include the employee data in the multipart request.

Additional Notes:

• If you encounter the error "No injection source found for a parameter of type public javax.ws.rs.core.Response" while using the new code, ensure that the proper Jersey configurations for handling multipart requests are in place in your server code.
• Some REST clients, like the browser's default FormData capabilities, may not support setting Content-Types for individual multipart parts. To address this, you can explicitly set the Content-Type for the JSON part before deserializing the data on the server side:

@POST
@Path("upload2")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFileAndJSON(@FormDataParam("emp") FormDataBodyPart jsonPart,
                                  @FormDataParam("file") FormDataBodyPart bodyPart) { 
     jsonPart.setMediaType(MediaType.APPLICATION_JSON_TYPE);
     Employee emp = jsonPart.getValueAs(Employee.class);
}

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