Spring Rest POST Json RequestBody Content type not supported

I found solution.
It’s was because I had 2 setter with same name but different type.

My class had id property int that I replaced with Integer when à Hibernitify my object.

But apparently, I forgot to remove setters and I had :

/**
 * @param id
 *            the id to set
 */
public void setId(int id) {
    this.id = id;
}

/**
 * @param id
 *            the id to set
 */
public void setId(Integer id) {
    this.id = id;
}

When I removed this setter, rest resquest work very well.

Intead to throw unmarshalling error or reflect class error. Exception HttpMediaTypeNotSupportedException seams really strange here.

I hope this stackoverflow could be help someone else.

SIDE NOTE

You can check your Spring server console for the following error message:

Failed to evaluate Jackson deserialization for type [simple type,
class your.package.ClassName]:
com.fasterxml.jackson.databind.JsonMappingException: Conflicting
setter definitions for property “propertyname”

Then you can be sure you are dealing with the issue mentioned above.