Spring boot中使用Jackson ObjectMapper注入

問題

自己spring boot已經集成了Jackson的庫，我想本身在Controller中直接使用Spring默認的ObjectMapper，應該怎麼作？

RestController.java

public class RestController {
    private final ObjectMapper jacksonObjectMapper;

    @Autowired
    public RestController(ObjectMapper jacksonObjectMapper) {
        this.jacksonObjectMapper = jacksonObjectMapper;
    }
}

或

@Autowired
private ObjectMapper jacksonObjectMapper;

或

@Resource
private ObjectMapper jacksonObjectMapper;

參考：

• How do I obtain the Jackson ObjectMapper in use by Spring 4.1?
• [Difference between @Autowired and @Resource in Spring](https://blog.oio.de/2010/01/26/difference-between-autowired-and-resource-in-spring/)