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Spring mvc request mapping for POST JSON request not working.

Sunny Mattas
Ranch Hand

Joined: Apr 22, 2008
Posts: 45
Hello All,
In our spring web application we are getting AJAX JSON request and I have to do the request mapping in controller.
Following is the structure of my request form data sent to the server.

Following is the request mapping I have done in the controller.

But I am getting the following error in the browser

415 Unsupported Media Type

Please let me know what is wrong with my request mapping. Thanks.


Sunny Mattas
Bill Gorder

Joined: Mar 07, 2010
Posts: 1646

Just a side note you should use the 'produces' and 'consumes' attributes of RequestMapping to define the Content-Type and Accept rather than the headers attribute. This was added in newer versions of Spring.

The likely culprit is one of 2 things:

-Either you do not have the Jackson type converter registered (should happen if you have used the annotation-config tag in the MVC namespace or the @EnableWebMvc annotation in your @Configuration file) IF the Jackson library is on your classpath.
-You have not set the Content-Type header on the incoming request to "application/json"

The easiest way to do some test posts is use the RestClient Firefox extension. Using this plugin you can post in some JSON and set the Content-Type header.

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H Paul
Ranch Hand

Joined: Jul 26, 2011
Posts: 391

Following Bill's advice. This is what I did to solve my json issue using Spring 3

1.a. Add to applicationContext-mvc.xml

Then implicitly RequestMappingHandlerMapping will be registered/called/used.
Then MappingJacksonHttpMessageConverter will be called as it is registered.

3. Controller

4. Fun to debug:

- The best is use a debugger and set breaking point on below classes and others

-have TCP/IP to see the request sent from the client to server: http headers + body

-log4j.xml to watch log:
I agree. Here's the link: http://aspose.com/file-tools
subject: Spring mvc request mapping for POST JSON request not working.
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