道路污染事件接口添加分页并按时间倒序

src/main/java/com/hisense/monitormanage/controller/QidiController.java

@@ -16,6 +16,7 @@ import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -50,6 +51,9 @@ public class QidiController {
     @Autowired
     private QidiService qidiService;
 
+    @Autowired
+    private RoadDataMapper roadDataMapper;
+
     //道路统计数据与排名
     @GetMapping("roadData")
     @ApiOperation("道路统计数据与排名，根据后台dt调用接口")
@@ -293,9 +297,14 @@ public class QidiController {
      */
     @GetMapping("selectRoadData")
     @ApiOperation("查询全部道路污染累计事件数量")
-    public Result selectRoadData(){
-        List<RoadData> roadData = roadDataService.selectRoadData();
-        Result success = Result.success(roadData);
+    public Result selectRoadData(Integer page,Integer pageSize){
+        List<RoadData> roadData = roadDataMapper.selectRoadData(page,pageSize);
+        Integer integer = roadDataMapper.selectCountRoadData();
+        page = integer/pageSize + 1;
+        Map<String,Object> map = new HashMap<>();
+        map.put("page",page);
+        map.put("roadData",roadData);
+        Result success = Result.success(map);
         return success;
     }
 

src/main/java/com/hisense/monitormanage/mapper/RoadDataMapper.java

@@ -3,6 +3,7 @@ package com.hisense.monitormanage.mapper;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.hisense.monitormanage.entity.RoadData;
 import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
 
 import java.util.List;
 import java.util.Map;
@@ -16,4 +17,9 @@ import java.util.Map;
  */
 public interface RoadDataMapper extends BaseMapper<RoadData> {
     public void batchSave(List<Map> list);
+
+    List<RoadData> selectRoadData(@Param("page") Integer page,@Param("pageSize") Integer pageSize);
+
+    @Select("select count(*) from t_road_data where pm10 > 150")
+    Integer selectCountRoadData();
 }

src/main/java/com/hisense/monitormanage/service/RoadDataService.java

@@ -119,13 +119,6 @@ public class RoadDataService {
         return list;
     }
 
-    public List<RoadData> selectRoadData(){
-        QueryWrapper<RoadData> queryWrapper = new QueryWrapper<>();
-        queryWrapper.gt("pm10",150);
-        List<RoadData> list = roadDataMapper.selectList(queryWrapper);
-        return list;
-    }
-
     //获取当前日期的时间串，2022-05-08 00:00:00
     private String dateTimeStr(){
         LocalDate localDate = LocalDate.now();

src/main/resources/mapper/RoadDataMapper.xml

@@ -16,5 +16,10 @@
         </foreach>
     </insert>
 
+    <select id="selectRoadData" resultType="com.hisense.monitormanage.entity.RoadData">
+        select * from t_road_data where pm10 > 150 order by dt desc
+        <bind name="page" value="(page-1)*pageSize"/>
+        limit #{page},#{pageSize}
+    </select>
 
 </mapper>