diff --git a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/JobLogController.java b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/JobLogController.java
index ab4da852..3cc01cd2 100644
--- a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/JobLogController.java
+++ b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/JobLogController.java
@@ -50,11 +50,11 @@ public class JobLogController {
 	public String index(HttpServletRequest request, Model model, @RequestParam(required = false, defaultValue = "0") Integer jobId) {
 
 		// 执行器列表
-		List<XxlJobGroup> jobGroupList_all =  xxlJobGroupDao.findAll();
+		List<XxlJobGroup> jobGroupListAll =  xxlJobGroupDao.findAll();
 
 		// filter group
-		List<XxlJobGroup> jobGroupList = JobInfoController.filterJobGroupByRole(request, jobGroupList_all);
-		if (jobGroupList==null || jobGroupList.size()==0) {
+		List<XxlJobGroup> jobGroupList = JobInfoController.filterJobGroupByRole(request, jobGroupListAll);
+		if (jobGroupList==null || jobGroupList.isEmpty()) {
 			throw new XxlJobException(I18nUtil.getString("jobgroup_empty"));
 		}
 
@@ -80,9 +80,9 @@ public class JobLogController {
 	@ResponseBody
 	public ReturnT<List<XxlJobInfo>> getJobsByGroup(int jobGroup){
 		List<XxlJobInfo> list = xxlJobInfoDao.getJobsByGroup(jobGroup);
-		return new ReturnT<List<XxlJobInfo>>(list);
+		return new ReturnT<>(list);
 	}
-	
+
 	@RequestMapping("/pageList")
 	@ResponseBody
 	public Map<String, Object> pageList(HttpServletRequest request,
@@ -92,7 +92,7 @@ public class JobLogController {
 
 		// valid permission
 		JobInfoController.validPermission(request, jobGroup);	// 仅管理员支持查询全部；普通用户仅支持查询有权限的 jobGroup
-		
+
 		// parse param
 		Date triggerTimeStart = null;
 		Date triggerTimeEnd = null;
@@ -103,15 +103,15 @@ public class JobLogController {
 				triggerTimeEnd = DateUtil.parseDateTime(temp[1]);
 			}
 		}
-		
+
 		// page query
 		List<XxlJobLog> list = xxlJobLogDao.pageList(start, length, jobGroup, jobId, triggerTimeStart, triggerTimeEnd, logStatus);
-		int list_count = xxlJobLogDao.pageListCount(start, length, jobGroup, jobId, triggerTimeStart, triggerTimeEnd, logStatus);
-		
+		int listCount = xxlJobLogDao.pageListCount(start, length, jobGroup, jobId, triggerTimeStart, triggerTimeEnd, logStatus);
+
 		// package result
-		Map<String, Object> maps = new HashMap<String, Object>();
-	    maps.put("recordsTotal", list_count);		// 总记录数
-	    maps.put("recordsFiltered", list_count);	// 过滤后的总记录数
+		Map<String, Object> maps = new HashMap<>();
+	    maps.put("recordsTotal", listCount);		// 总记录数
+	    maps.put("recordsFiltered", listCount);	// 过滤后的总记录数
 	    maps.put("data", list);  					// 分页列表
 		return maps;
 	}
@@ -120,7 +120,7 @@ public class JobLogController {
 	public String logDetailPage(int id, Model model){
 
 		// base check
-		ReturnT<String> logStatue = ReturnT.SUCCESS;
+//		ReturnT<String> logStatue = ReturnT.SUCCESS;
 		XxlJobLog jobLog = xxlJobLogDao.load(id);
 		if (jobLog == null) {
             throw new RuntimeException(I18nUtil.getString("joblog_logid_unvalid"));
@@ -152,7 +152,7 @@ public class JobLogController {
 			return logResult;
 		} catch (Exception e) {
 			logger.error(e.getMessage(), e);
-			return new ReturnT<LogResult>(ReturnT.FAIL_CODE, e.getMessage());
+			return new ReturnT<>(ReturnT.FAIL_CODE, e.getMessage());
 		}
 	}
 
@@ -163,10 +163,10 @@ public class JobLogController {
 		XxlJobLog log = xxlJobLogDao.load(id);
 		XxlJobInfo jobInfo = xxlJobInfoDao.loadById(log.getJobId());
 		if (jobInfo==null) {
-			return new ReturnT<String>(500, I18nUtil.getString("jobinfo_glue_jobid_unvalid"));
+			return new ReturnT<>(500, I18nUtil.getString("jobinfo_glue_jobid_unvalid"));
 		}
 		if (ReturnT.SUCCESS_CODE != log.getTriggerCode()) {
-			return new ReturnT<String>(500, I18nUtil.getString("joblog_kill_log_limit"));
+			return new ReturnT<>(500, I18nUtil.getString("joblog_kill_log_limit"));
 		}
 
 		// request of kill
@@ -176,7 +176,7 @@ public class JobLogController {
 			runResult = executorBiz.kill(new KillParam(jobInfo.getId()));
 		} catch (Exception e) {
 			logger.error(e.getMessage(), e);
-			runResult = new ReturnT<String>(500, e.getMessage());
+			runResult = new ReturnT<>(500, e.getMessage());
 		}
 
 		if (ReturnT.SUCCESS_CODE == runResult.getCode()) {
@@ -184,9 +184,9 @@ public class JobLogController {
 			log.setHandleMsg( I18nUtil.getString("joblog_kill_log_byman")+":" + (runResult.getMsg()!=null?runResult.getMsg():""));
 			log.setHandleTime(new Date());
 			xxlJobLogDao.updateHandleInfo(log);
-			return new ReturnT<String>(runResult.getMsg());
+			return new ReturnT<>(runResult.getMsg());
 		} else {
-			return new ReturnT<String>(500, runResult.getMsg());
+			return new ReturnT<>(500, runResult.getMsg());
 		}
 	}
 
@@ -215,16 +215,16 @@ public class JobLogController {
 		} else if (type == 9) {
 			clearBeforeNum = 0;			// 清理所有日志数据
 		} else {
-			return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("joblog_clean_type_unvalid"));
+			return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString("joblog_clean_type_unvalid"));
 		}
 
 		List<Long> logIds = null;
 		do {
 			logIds = xxlJobLogDao.findClearLogIds(jobGroup, jobId, clearBeforeTime, clearBeforeNum, 1000);
-			if (logIds!=null && logIds.size()>0) {
+			if (logIds!=null && !logIds.isEmpty()) {
 				xxlJobLogDao.clearLog(logIds);
 			}
-		} while (logIds!=null && logIds.size()>0);
+		} while (logIds!=null && !logIds.isEmpty());
 
 		return ReturnT.SUCCESS;
 	}