Spring @ReponseBody @RequestBody with abstract class

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ref link

I just found the answer myself and here is the reference link.

What I have done is added some code above the abstract class

import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeInfo.*;

@JsonTypeInfo(use = Id.NAME, include = As.PROPERTY, property = "type")
@JsonSubTypes({
    @JsonSubTypes.Type(value = Cat.class, name = "cat"),
    @JsonSubTypes.Type(value = Dog.class, name = "dog")
})
public abstract class Animal{}

Then in the json input in HTML,

var inputjson = {
    "type":"cat",
    //blablabla
};

After submitting the json and finally in the controller,

@RequestMapping(value = "/animal", method = RequestMethod.POST, produces = "application/json; charset=utf-8", consumes=MediaType.APPLICATION_JSON_VALUE)
public @ResponseBody insertanimal(@RequestBody Animal tmp) {
    return tmp;
}

In this case variable tmp is automatically converted to a Dog or Cat object, depending on json input.

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