java - Jackson Polymorphic Deserialization Field Errors -

I am getting an error while trying to deserialize json in an abstract type.

Code:

  @JsonTypeInfo (use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@ Class ") Public abstract class animal {} public square dog expansion animal {} Public square zoo (animal a;) @RequestMapping (value =" / zoos ", method = RequestMethod.POST) Generate Public Zero (@RequestBody Zoo) { ...}   
 When I post the following zson in zoos:  
  {"@class": "com.example.Dog", "A": {}}   
 I get an error: org. Codehaus.jackson.map.exc.UnrecognizedPropertyExcept Ion: Unrecognized area "@ class" (class com.example.Zoo), which is not unknowingly marked  
 What am I doing wrong?   
  
 
 
 
 
 
 
 
 
 
 
 Okay, I'm stupid:  
 must be json:  
  {"A" : {"@class": "com.example.Dog"}}   
 Because @ class belongs to the type of animal.