Java spring framework - how to set content type?

Question

I have a spring action that I am rendering some json from the controller, at the minute its returning the content type 'text/plain;charset=ISO-8859-1'.

How can I change this to be 'application/json'?

See also this answer to a similar question: http://stackoverflow.com/a/11349642/66686 — Jens Schauder, Jul 21 '12 at 06:22

score 19 · Accepted Answer · answered Apr 09 '10 at 08:32

19

Pass the HttpServletResponse to your action method and set the content type there:

public String yourAction(HttpServletResponse response) {
    response.setContentType("application/json");
}

answered Apr 09 '10 at 08:32

Bozho

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Hi, I've tried that put I just get the error "cannot find symbol symbol : class HttpServletResponse" when compiling – Ian morgan Apr 09 '10 at 08:40
3

well, did you import it? `import javax.servlet.http.HttpServeltResponse` – Bozho Apr 09 '10 at 08:48
and do you have the servlet-api on your classpath – Bozho Apr 09 '10 at 08:50

score 5 · Answer 2 · edited Aug 03 '12 at 09:48

5

Did you try using the MappingJacksonJsonView?

Spring-MVC View that renders JSON content by serializing the model for the current request using Jackson's ObjectMapper.

It sets the content-type to: application/json.

edited Aug 03 '12 at 09:48

reevesy

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answered May 01 '10 at 15:02

Thomas Vanstals

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Heh, I was doing manually what has already been provided for me by Spring. Thanks for the pointer :) – tmbrggmn Jul 17 '10 at 18:39

score 3 · Answer 3 · edited Aug 03 '12 at 09:47

 @RequestMapping(value = "jsonDemoDude", method = RequestMethod.GET)
    public void getCssForElasticSearchConfiguration(HttpServletResponse response) throws IOException {        
        String jsonContent= ...;
        HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper(response);
        wrapper.setContentType("application/json;charset=UTF-8");
        wrapper.setHeader("Content-length", "" + jsonContent.getBytes().length);
        response.getWriter().print(jsonContent);
}

You can also add the aditional X bytes or whatever for "callback" part in case you want JSONP ( cross site json request ) .

score 2 · Answer 4 · answered Apr 13 '10 at 11:24

2

Yes, but this only works if one is grabbing the HttpServletResponse in the controller.

In Spring 3 we're being encouraged to avoid references to anything in the servlet domain, keeping things solely to our POJOs and annotations. Is there a way to do this without referencing the HttpServletResponse? I.e., keeping ourselves pure?

answered Apr 13 '10 at 11:24

Ichiro Furusato

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You could use a JSR-311 (JAX-RS) implementation, that provides explicit control of content types via annotations. Here is a discussion of those: http://stackoverflow.com/questions/1710199/which-is-the-best-java-rest-api-restlet-or-jersey – FelixM Jan 28 '11 at 15:10
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Yes, you can use the "produces" attribute of the @RequestMapping annotation, see http://stackoverflow.com/a/12023805/10433 for an example of setting the encoding this way. – Andrew Swan Feb 28 '13 at 23:55

Java spring framework - how to set content type?

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