錯誤資訊：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 11:14:43.841 ERROR org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter 42 report - 

*************************** APPLICATION FAILED TO START ***************************

Description:

A component required a bean of type 'com.xxx.xxx.api.system.service.ThingService' that could not be found.

Action:

Consider defining a bean of type 'com.xxx.xxx.api.system.service.ThingService' in your configuration.

Process finished with exit code 0

原因：

1. 背景---一個a.Impl裡，引用另一個b.Impl中的方法，方法寫錯

在建類自動生成時，少寫@Resource   忘記繼承 implements ThingService       @Override

a.Impl寫法：

用法：thingService.updateThing(url, thingRequest, "");//呼叫改方法

public class DeviceServiceImpl implements DeviceService {

    @Resource
    ThingService thingService; //宣告引用的service

    /**
     * 新增一條裝置資訊
     *
     * @param request
     * @return
     */
    @Override
    public String add(DeviceAddRequest request) {
        //若模板為空，只存資料庫，不存模型
        if (StrKit.isEmpty(request.getTemplateid())) {
            return addToDatabase(request,"");
        }else{//若模板不為空，先存模型，後存資料庫
            //先調模型，將裝置名稱，模板id存入模型
            ThingAddRequest thingRequest = new ThingAddRequest();
            thingRequest.setName(request.getDevicename());
            thingRequest.setThingTemplateId(request.getTemplateid());
            String resultsId = thingService.updateThing(url, thingRequest, "");//呼叫改方法
            //存資料庫
            return addToDatabase(request,resultsId);
        }
    }
 

b.Impl寫法：

@Service
public class ThingServiceImpl implements ThingService {
    /**
     * 新建thing
     * @param targetUrl 請求地址
     * @param requestObj 請求引數，新增thing陣列
     * @return 操作結果，檢視results屬性，返回的String[]是新增節點的uri
     * "results": ["a01e8e76-9d5e-435d-8c9e-8fd14f5e75ca"]
     */
    @Override
    public String updateThing(String targetUrl , ThingAddRequest requestObj, String token){
        String requestStr = JSON.toJSONString(requestObj);
        String url = targetUrl + "/thing" ;
        try {
            String responseStr =  HttpHelper.post(url, requestStr, token);
            JSONObject responseJson = (JSONObject) JSON.parse(responseStr);
            if (responseJson.getString("statuscode").equals("-1")){
                throw new CustomException(responseJson.getString("message"));
            }
            return responseJson.getString("results");
        } catch (RuntimeException e){
            throw new CustomException(e.getMessage());
        }
    }
}