[FIXED] How to set custom header for org.springframework.httpHttpHeaders.setContentType() not listed in org.springframework.http.MediaType?

Issue

We have a restTemplate with

headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);

but for out usage we need to set up custom Content-Type header

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

but headers.setContentType() doesn't accept just String. How to work it around?

Solution

I misunderstood your question; hence removed old post

For setting custom header type you can do following:

    headers.set(HttpHeaders.CONTENT_TYPE, 
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

Headers#setContentType is internally calling headers.set(String,String) only which I used above.

Answered By - Ashish Patil
Answer Checked By - Pedro (JavaFixing Volunteer)