fix: SpotBugs扫描分析（三）：修复可能的溢出与NPE问题

austin-cron/src/main/java/com/java3y/austin/cron/xxl/service/impl/CronTaskServiceImpl.java

@@ -168,7 +168,8 @@ public class CronTaskServiceImpl implements CronTaskService {
                     response != null ? JSON.toJSONString(response.body()) : "");
         }
         invalidateCookie();
-        return BasicResultVO.fail(RespStatusEnum.SERVICE_ERROR, JSON.toJSONString(response.body()));
+        return BasicResultVO.fail(RespStatusEnum.SERVICE_ERROR,
+                response != null ? JSON.toJSONString(response.body()) : "");
     }
 
     @Override

austin-handler/src/main/java/com/java3y/austin/handler/handler/impl/DingDingWorkNoticeHandler.java

@@ -9,7 +9,6 @@ import com.dingtalk.api.request.OapiMessageCorpconversationAsyncsendV2Request;
 import com.dingtalk.api.request.OapiMessageCorpconversationGetsendresultRequest;
 import com.dingtalk.api.request.OapiMessageCorpconversationRecallRequest;
 import com.dingtalk.api.response.OapiMessageCorpconversationAsyncsendV2Response;
-import com.dingtalk.api.response.OapiMessageCorpconversationGetsendresultResponse;
 import com.dingtalk.api.response.OapiMessageCorpconversationRecallResponse;
 import com.google.common.base.Throwables;
 import com.java3y.austin.common.constant.AustinConstant;
@@ -179,7 +178,7 @@ public class DingDingWorkNoticeHandler extends BaseHandler{
             OapiMessageCorpconversationGetsendresultRequest req = new OapiMessageCorpconversationGetsendresultRequest();
             req.setAgentId(Long.valueOf(account.getAgentId()));
             req.setTaskId(456L);
-            OapiMessageCorpconversationGetsendresultResponse rsp = client.execute(req, accessToken);
+            client.execute(req, accessToken);
         } catch (Exception e) {
             log.error("DingDingWorkNoticeHandler#pull fail:{}", Throwables.getStackTraceAsString(e));
         }

austin-support/src/main/java/com/java3y/austin/support/utils/TaskInfoUtils.java

@@ -13,7 +13,7 @@ import java.util.Date;
  * @author 3y
  */
 public class TaskInfoUtils {
-    private static final int TYPE_FLAG = 1000000;
+    private static final long TYPE_FLAG = 1000000L;
     private static final String CODE = "track_code_bid";
     private TaskInfoUtils() {
     }
@@ -34,7 +34,7 @@ public class TaskInfoUtils {
      */
     public static Long generateBusinessId(Long templateId, Integer templateType) {
         Integer today = Integer.valueOf(DateUtil.format(new Date(), DatePattern.PURE_DATE_PATTERN));
-        return Long.valueOf(String.format("%d%s", templateType * TYPE_FLAG + templateId, today));
+        return Long.valueOf(String.format("%d%s", templateType.longValue() * TYPE_FLAG + templateId, today));
     }
 
     /**