diff --git a/src/main/java/com/xydl/cac/entity/constants/Constants.java b/src/main/java/com/xydl/cac/entity/constants/Constants.java
index 32dad97..d211e5a 100644
--- a/src/main/java/com/xydl/cac/entity/constants/Constants.java
+++ b/src/main/java/com/xydl/cac/entity/constants/Constants.java
@@ -6,4 +6,7 @@ public class Constants {
 
     public static final Integer YaoCe = 2;
     public static final Integer YaoXin = 1;
+
+    public static final Integer TRUE = 1;
+    public static final Integer FALSE = 0;
 }
diff --git a/src/main/java/com/xydl/cac/service/impl/DataServiceImpl.java b/src/main/java/com/xydl/cac/service/impl/DataServiceImpl.java
index d367cc5..257d741 100644
--- a/src/main/java/com/xydl/cac/service/impl/DataServiceImpl.java
+++ b/src/main/java/com/xydl/cac/service/impl/DataServiceImpl.java
@@ -95,36 +95,56 @@ public class DataServiceImpl implements DataService {
             // 需要抽取数据
             if (model.getPageNum() != null || model.getPageSize() != null) {
 
-                // 当前一页
+                // 每页天数
                 int dayPerPage = model.getPageSize() / model.getNumPerDay();
                 if (dayPerPage < 1) {
                     dayPerPage = 1;
                 }
                 ConditionModel newmodel = new ConditionModel();
+                newmodel.setTimeAsc(model.getTimeAsc());
 
-                // 处理开始和结束时间
+                // 结束时间和总天数
                 Date end = model.getEndTime();
                 if (end == null) {
                     end = new Date();
                 }
                 end = DateUtil.addDay(end, 1);
                 end = DateUtil.getDayZero(end);
+                model.setEndTime(end);
                 if (model.getStartTime() != null) {
                     totalDays = DateUtil.getDifferenceInDays(model.getStartTime(), end);
                 }
 
-                if (model.getPageNum() > 1) {
-                    int p = model.getPageNum() - 1;
-                    end = DateUtil.addDay(end, -dayPerPage * p);
-                }
-                newmodel.setEndTime(end);
-                Date start = DateUtil.addDay(end, -dayPerPage);
-                if (model.getStartTime() == null || start.compareTo(model.getStartTime()) > 0) {
+                if (model.getTimeAsc() != null && model.getTimeAsc() > 0) {
+                    // 升序
+                    Date start = model.getStartTime();
+                    if (model.getPageNum() > 1) {
+                        int p = model.getPageNum() - 1;
+                        start = DateUtil.addDay(start, dayPerPage * p);
+                    }
                     newmodel.setStartTime(start);
+                    end = DateUtil.addDay(start, dayPerPage);
+                    if (model.getEndTime() == null || end.compareTo(model.getEndTime()) < 0) {
+                        newmodel.setEndTime(end);
+                    } else {
+                        newmodel.setEndTime(model.getEndTime());
+                    }
                 } else {
-                    newmodel.setStartTime(model.getStartTime());
+                    // 降序
+                    if (model.getPageNum() > 1) {
+                        int p = model.getPageNum() - 1;
+                        end = DateUtil.addDay(end, -dayPerPage * p);
+                    }
+                    newmodel.setEndTime(end);
+                    Date start = DateUtil.addDay(end, -dayPerPage);
+                    if (model.getStartTime() == null || start.compareTo(model.getStartTime()) > 0) {
+                        newmodel.setStartTime(start);
+                    } else {
+                        newmodel.setStartTime(model.getStartTime());
+                    }
                 }
 
+                // 查询
                 page = this.doSqlData(sensor, points, newmodel);
                 page.setTotal(totalDays * model.getNumPerDay());
 
@@ -161,7 +181,7 @@ public class DataServiceImpl implements DataService {
             sqlWhere = sqlWhere + " AND " + timeField + " < '" + DateUtil.format(model.getEndTime()) + "'";
         }
         String sqlOrder = " ORDER BY " + timeField;
-        if (model.getTimeAsc() != null && model.getTimeAsc() == 1) {
+        if (model.getTimeAsc() != null && model.getTimeAsc() > 0) {
             sqlOrder = sqlOrder + " ASC";
         } else {
             sqlOrder = sqlOrder + " DESC";
diff --git a/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java b/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
index 883ce5a..60004db 100644
--- a/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
+++ b/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
@@ -140,7 +140,9 @@ public class NSensorServiceImpl implements NSensorService {
     public SensorDetail<Map<String, Object>> getDetail(ConditionModel model) throws Exception {
         NSensor sensor;
         if (model.getTimeAsc() == null) {
-            model.setTimeAsc(0);
+            model.setTimeAsc(Constants.FALSE);
+        } else if (model.getTimeAsc() > 0 && model.getStartTime() == null) {
+            throw new BusinessException("升序情况下开始时间不能为空");
         }
         if (model.getId() != null) {
             Optional<NSensor> optional = repository.findById(model.getId());