以下分享一個能接收JSON和回傳JSON的API功能範例和說明

@RequestMapping註解屬性說明
value:指定HTTP請求路徑對應到Controller中的方法 (例如:/ApiNotifications)
method:指定HTTP請求所使用的方法 (例如:POST)
consumes:指定HTTP請求提交的内容類型（Content-Type）(例如:application/json)

@RequestMapping(value = "/ApiNotifications", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody 
public ResponseEntity<JSONObject> ApiNotifications(@RequestBody JSONObject data) throws Exception {
		log.info("[ApiNotifications] : start ");
		String empId = data.getString("empId");
		String empName = data.getString("empName");
		log.info("[ApiNotifications] : empId " +empId);
		log.info("[ApiNotifications] : empName " +empName);

		JSONObject result = new JSONObject();
		EmpDetail empDetail = new EmpDetail();  // EmpDetail 類別
		try{
			empDetail.setEmpId(empId);
				if(empDetailMapper.getEmpNameByEmpId(empId) == null){
					empDetailMapper.insert(empDetail);
					//traceLogMapper.insert("HRIS",empId,"新增員工通知"); 
				}	
		}catch(Exception e){
			result.put("code", "E");
			result.put("msg", "錯誤");
			return  ResponseEntity.badRequest().body(result);
		}
		result.put("code", "S");
		result.put("msg", "成功");
		log.info("[ApiNotifications] : end ");
		return  ResponseEntity.ok().body(result);
}

除了API本身，Controller還能視需要搭配@Slf4j @RestController 等註解，並使用@Autowired註解自動注入容器中可以匹配的Bean

@Autowired
	private EmpDetailMapper empDetailMapper;

EmpDetail類別，需要載入lombok.Data

	@Data
	public class EmpDetail implements Serializable {
		private static final long serialVersionUID = 1L;
		private String empId;
		private String empName;
		private List<EmpData> empData;
		}

MyBatis實作，需要載入ibatis.annotations

@Mapper
public interface EmpDetailMapper {
	
	@Select("SELECT TOP 1 empName FROM EMPDETAIL "
			+ "WHERE empId = #{empId} "
			)
	public  String getEmpNameByEmpId(@Param("empId") String empId);
	
	@Insert("INSERT into EMPDETAIL (EMPID,EMPNAME) values "
			+ "(#{empId}, #{empName})")
	public void insert(EmpDetail EMPDETAIL);
}