fix: 设备最后上数时间，新增字段，接口调用，小程序显示。

intc-modules/intc-iot/src/main/java/com/intc/iot/controller/IotController.java

@@ -1,9 +1,11 @@
 package com.intc.iot.controller;
 
+import cn.dev33.satoken.annotation.SaCheckPermission;
 import com.intc.common.core.domain.R;
 import com.intc.common.mybatis.core.page.PageQuery;
 import com.intc.common.mybatis.core.page.TableDataInfo;
 import com.intc.common.satoken.utils.LoginHelper;
+import com.intc.common.tenant.helper.TenantHelper;
 import com.intc.common.web.core.BaseController;
 import com.intc.common.core.config.properties.DeviceTypeProperties;
 import com.intc.fishery.domain.Device;
@@ -46,6 +48,7 @@ import com.intc.iot.utils.ControllerHelper;
 import com.intc.iot.service.IotCloudService;
 import com.intc.iot.constant.IOTPropertyName;
 import com.intc.fishery.utils.MessageOpRecordUtil;
+import com.intc.tdengine.service.IDeviceSensorDataService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -57,6 +60,9 @@ import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.Date;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.Map;
 
@@ -72,6 +78,8 @@ import java.util.Map;
 @Tag(name = "生活物联网平台管理", description = "阿里云飞燕平台对接接口")
 public class IotController extends BaseController {
 
+    private static final DateTimeFormatter DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
     private final DeviceTypeProperties deviceTypeProperties;
 
     @Autowired(required = false)
@@ -101,6 +109,9 @@ public class IotController extends BaseController {
     @Autowired(required = false)
     private DeviceDataHandler deviceDataHandler;
 
+    @Autowired(required = false)
+    private IDeviceSensorDataService deviceSensorDataService;
+
     @Autowired(required = false)
     private javax.jms.Connection amqpConnection;
 
@@ -191,6 +202,82 @@ public class IotController extends BaseController {
         }
     }
 
+    @Operation(summary = "回填设备最后上数时间")
+    @SaCheckPermission("fishery:device:edit")
+    @PostMapping("/device/backfill-last-report-time")
+    public R<Map<String, Object>> backfillLastReportTime(
+        @RequestParam(defaultValue = "false") boolean ignoreTenant) {
+        if (deviceMapper == null || deviceSensorDataService == null) {
+            return R.fail("设备或TDengine服务未启用");
+        }
+
+        Map<String, Object> result = ignoreTenant
+            ? TenantHelper.ignore((java.util.function.Supplier<Map<String, Object>>) this::doBackfillLastReportTime)
+            : doBackfillLastReportTime();
+        result.put("ignoreTenant", ignoreTenant);
+        return R.ok(result);
+    }
+
+    private Map<String, Object> doBackfillLastReportTime() {
+        int total = 0;
+        int updated = 0;
+        int skipped = 0;
+        int failed = 0;
+
+        List<Device> devices = deviceMapper.selectList(
+            new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<Device>()
+                .isNotNull(Device::getSerialNum)
+                .ne(Device::getSerialNum, "")
+                .select(Device::getId, Device::getSerialNum)
+        );
+
+        total = devices.size();
+        for (Device device : devices) {
+            try {
+                String latestTime = deviceSensorDataService.getLatestReportTime(device.getSerialNum());
+                if (latestTime == null || latestTime.isBlank()) {
+                    skipped++;
+                    continue;
+                }
+
+                Device updateDevice = new Device();
+                updateDevice.setId(device.getId());
+                updateDevice.setLastReportTime(parseReportTime(latestTime));
+                if (deviceMapper.updateById(updateDevice) > 0) {
+                    updated++;
+                } else {
+                    skipped++;
+                }
+            } catch (Exception e) {
+                failed++;
+                log.warn("回填设备最后上数时间失败: deviceId={}, serialNum={}, error={}",
+                    device.getId(), device.getSerialNum(), e.getMessage());
+            }
+        }
+
+        Map<String, Object> result = new java.util.HashMap<>();
+        result.put("total", total);
+        result.put("updated", updated);
+        result.put("skipped", skipped);
+        result.put("failed", failed);
+        return result;
+    }
+
+    private Date parseReportTime(String time) {
+        String normalized = normalizeReportTime(time);
+        return Date.from(LocalDateTime.parse(normalized, DATETIME_FORMATTER)
+            .atZone(ZoneId.systemDefault())
+            .toInstant());
+    }
+
+    private String normalizeReportTime(String time) {
+        String normalized = time.trim();
+        if (normalized.length() > 19) {
+            normalized = normalized.substring(0, 19);
+        }
+        return normalized.replace('T', ' ');
+    }
+
     @Operation(summary = "根据 ProductKey 和 DeviceName 查询设备信息")
     @GetMapping("/device/find")
     public R<Map<String, Object>> findDeviceByProductKeyAndName(

intc-modules/intc-iot/src/main/java/com/intc/iot/handler/DeviceDataHandler.java

@@ -40,7 +40,9 @@ import org.springframework.stereotype.Component;
 
 import java.time.Duration;
 import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -2595,6 +2597,7 @@ public class DeviceDataHandler {
             if (sensorData.getBattery() != null) {
                 updateDevice.setValueBattery(sensorData.getBattery().intValue());
             }
+            updateDevice.setLastReportTime(parseSensorDataTime(sensorData));
             int updated = deviceMapper.updateById(updateDevice);
             if (updated > 0) {
                 log.debug("设备实时数据已更新: {}", deviceName);
@@ -2604,6 +2607,29 @@ public class DeviceDataHandler {
         }
     }
 
+    private Date parseSensorDataTime(DeviceSensorData sensorData) {
+        String time = StrUtil.blankToDefault(sensorData.getCreateTime(), sensorData.getTime());
+        if (StrUtil.isBlank(time)) {
+            return new Date();
+        }
+        try {
+            return Date.from(LocalDateTime.parse(normalizeSensorDataTime(time), DATETIME_FORMATTER)
+                .atZone(ZoneId.systemDefault())
+                .toInstant());
+        } catch (Exception e) {
+            log.warn("解析传感器上数时间失败，使用当前服务器时间: {}", time);
+            return new Date();
+        }
+    }
+
+    private String normalizeSensorDataTime(String time) {
+        String normalized = time.trim();
+        if (normalized.length() > 19) {
+            normalized = normalized.substring(0, 19);
+        }
+        return normalized.replace('T', ' ');
+    }
+
     /**
      * 溶解氧联动控制（参考 C# SetDeviceSwitchLinkedOpen 逻辑）
      * <ul>