[Spring & Spring Boot] 자바 객체를 JSON 문자열로 변경

사전작업

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

JSON 문자열을 자바 객체로 ( JSON --> Object)

예시

@RestController
public class Controller {

    @Autowired
    private ObjectMapper mapper;


    @PostMapping(
        value = "/work",
        consumes = MediaType.APPLICATION_JSON_VALUE
    )
    public void insertWork(@RequestBody String reqParm) throws IOException {

        WorkDto workDto = null;
        workDto = mapper.readValue(reqParm, WorkDto.class);

    }
}

자바 객체를 JSON 문자열로 (Object --> JSON)

예시

@RestController public class Controller {

@Autowired
private ObjectMapper mapper;

public void tempFunction(WorkDto workDto) throws JsonProcessingException {
    String tempText = mapper.writeValueAsString(workDto);
    }
}