PostMapping과 @JsonProperty

@JsonProperty

• DTO에서 카멜케이스로 작성을 했지만 보내는쪽(클라이언트)에서 스네이크 케이스로 보냈을시 어떻게 되는지 살펴보자.

PostApiController.java

package com.example.post.controller;

import com.example.post.dto.PostRequestDto;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

@RestController
@RequestMapping("/api")
public class PostApiController {

    @PostMapping("/post")
    public void post(@RequestBody PostRequestDto requestData) {

        System.out.println(requestData);
    }
}

PostRequestDto.java

package com.example.post.dto;

public class PostRequestDto {

    private String account;
    private String email;
    private String address;
    private String password;

    private String phoneNumber;

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String getAccount() {
        return account;
    }

    public void setAccount(String account) {
        this.account = account;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "PostRequestDto{" +
                "account='" + account + '\'' +
                ", email='" + email + '\'' +
                ", address='" + address + '\'' +
                ", password='" + password + '\'' +
                ", phoneNumber='" + phoneNumber + '\'' +
                '}';
    }
}

• java code 에서는 휴대폰번호를 카멜케이스로 phoneNumber라고 하였고 API TEST Tool에서는 스네이크케이스로 phone_number라고 보내보았다.

PostRequestDto{account='user', email='aaa@gmail.com', address='서울', password='121212', phoneNumber='null'}
PostRequestDto{account='user', email='aaa@gmail.com', address='서울', password='121212', phoneNumber='null'}

당연히 null이 뜬다. Dto에 @JsonProperty를 달아줘보자.

PostRequestDto.java

package com.example.post.dto;

import com.fasterxml.jackson.annotation.JsonProperty;

public class PostRequestDto {

    private String account;
    private String email;
    private String address;
    private String password;

    @JsonProperty("phone_number")
    private String phoneNumber;

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String getAccount() {
        return account;
    }

    public void setAccount(String account) {
        this.account = account;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "PostRequestDto{" +
                "account='" + account + '\'' +
                ", email='" + email + '\'' +
                ", address='" + address + '\'' +
                ", password='" + password + '\'' +
                ", phoneNumber='" + phoneNumber + '\'' +
                '}';
    }
}

똑같이 스네이크케이스로 보내면

PostRequestDto{account='user', email='aaa@gmail.com', address='서울', password='121212', phoneNumber='010-1212-1212'}