POST JSON fails with 415 Unsupported media type, Spring 3 mvc

user_41977 0
Viewed 527287

I am trying to send a POST request to a servlet. Request is sent via jQuery in this way:

var productCategory = new Object();
productCategory.idProductCategory = 1;
productCategory.description = "Descrizione2";
newCategory(productCategory);

where newCategory is

function newCategory(productCategory)
{
  $.postJSON("ajax/newproductcategory", productCategory, function(
      idProductCategory)
  {
    console.debug("Inserted: " + idProductCategory);
  });
}

and postJSON is

$.postJSON = function(url, data, callback) {
    return jQuery.ajax({
    'type': 'POST',
    'url': url,
    'contentType': 'application/json',
    'data': JSON.stringify(data),
    'dataType': 'json',
    'success': callback
    });
};

With firebug I see that JSON is sent correctly:

{"idProductCategory":1,"description":"Descrizione2"}

But I get 415 Unsupported media type. Spring mvc controller has signature

    @RequestMapping(value = "/ajax/newproductcategory", method = RequestMethod.POST)
public @ResponseBody
Integer newProductCategory(HttpServletRequest request,
        @RequestBody ProductCategory productCategory)

Some days ago it worked, now it is not. I'll show more code if needed.

http-status-code-415 post spring json ajax
15 Answers

Spring boot + spring mvn

with issue 

@PostMapping("/addDonation")
public String addDonation(@RequestBody DonatorDTO donatorDTO) {

with solution 

@RequestMapping(value = "/addDonation", method = RequestMethod.POST)
@ResponseBody
public GenericResponse addDonation(final DonatorDTO donatorDTO, final HttpServletRequest request){
user_93281170

I resolved this issue by adding jackson-json data binding to my pom.

<dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.6.3</version>
</dependency>
user_59168510

In your Model Class add a json property annotation, also have a default constructor

@JsonProperty("user_name")
private String userName;

@JsonProperty("first_name")
private String firstName;

@JsonProperty("last_name")
private String lastName;
user_38662900

I had the same issue. adding 

<mvc:annotation-driven />
<mvc:default-servlet-handler />

to the spring-xml solved it

user_4216420

In addition to setting the Accept and Content-Type headers, and making sure they match the consumes/produces settings for your controller method, you may also want to look at the JSON structure and making sure there are no issues with marshalling and unmarshalling. In my case the content type was OK, but there were issues with mapping JSON requests to my request/response model. Normally the controller should return a 400 error rather than a 415 error, but in my case the error code was 415. I debugged the issue by adding a test class where I used an ObjectMapper to read my JSON into the request model object. The ObjectMapper choked on the request, and gave me helpful errors that helped me fix my model class definition.

user_158568200
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