Handling JSON and form data request with Spring MVC

Question

I'm working on simple Spring-MVC application and I love new Spring REST features. I'd like to use the same method to process regular form and JSON data. It seems to be a little tricky, however. For example, method

public @ResponseBody String process(@RequestBody Bean bean);

will work for JSON request (Content-type: application/json), and

public @ResponseBody String process(Bean bean);

will match request with Content-type: application/x-www-form-urlencoded.

These methods are obviously will have almost the same content, so I'd prefer to avoid such duplication. With Jersey it's possible with @Consumes annotations, but I can't figure out how to do it with Spring.

What is the return type for those methods? I thought you needed to specify a "type" after the @ResponseBody annotation or at least void? — nickdos
– nickdos, Commented Feb 15, 2011 at 23:32
Oh, sorry missed return types. They are irrelevant, in fact. It seems, Spring matches request by arguments. — rsvato
– rsvato, Commented Feb 16, 2011 at 9:23

Bozho · Accepted Answer · 2011-02-16 09:32:50Z

1

First, the above declaration won't compile, because you are having duplicate signature.

Btw, @Consumes wouldn't help, I think, because it only designates what content type the method can handle.

In spring you can specify the content-type with

@RequestMapping(headers="Content-Type=application/json")

answered Feb 16, 2011 at 9:32

Bozho

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8 Comments

rsvato Over a year ago

@Consumes is for Jersey, sorry for misunderstanding. Thanks for your remark about compilation, but these signatures are just for demonstration purposes. What I really need is not to have different methods for JSON and form data processing, which seems to be impossible with Spring MVS.

Bozho Over a year ago

@rsvato and how is it possible in Jersey? I've shown the equivallent of Consumes - it's "headers". But how would it work in Jersey? You can specify that the method handles both content types (and so can you in spring), and then?

rsvato Over a year ago

And then approriate MessageBodyReader implementation will decode request. So it's just a question of provider (in Jersey). You mean it's impossible to process several content types with one method?

Bozho Over a year ago

@rsvato - I was asking how will you do it. I've done very little with jax-rs.

rsvato Over a year ago

Ah, I see. Well, i'm annotating method with @Consumes({"application/json", "application/xml", "application/form"}) which means that this method may process all three types of requests.

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Supun Dharmarathne · Accepted Answer · 2018-05-23 08:22:28Z

0

Just add @RestController annotation for the controller class.

answered May 23, 2018 at 8:22

Supun Dharmarathne

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