SpringBoot @JsonProperty annotation seems to be ignored when using query object parameter

springboot version: 3.2.2,2.7.13

import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/api/coupon")
public class CouponController {

    @PostMapping
    public String post(@RequestBody CouponReq couponReq) {
        return "mallId:" + couponReq.getMallId();
    }

    @GetMapping
    public String get(CouponReq couponReq) {
        return "mallId:" + couponReq.getMallId();
    }

}

import com.fasterxml.jackson.annotation.JsonProperty;
public class CouponReq {
    @JsonProperty("mall_id")
    String mallId;

    public CouponReq() {
    }


    public String getMallId() {
        return this.mallId;
    }

    @JsonProperty("mall_id")
    public void setMallId(String mallId) {
        this.mallId = mallId;
    }
}

result

POST http://localhost:8080/api/coupon
Content-Type: application/json

{
  "mall_id": "21343124"
}
# response: mallId:21343124


GET http://localhost:8080/api/coupon?mall_id=1234123
# response: mallId:null

Is this a bug, or am I doing something wrong?

Comment From: wilkinsona

You're doing something wrong. There's no JSON involved when you're providing the id as a query parameter so @JsonProperty has no effect.

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