二维码导出完成

device-api-service/src/main/java/com/xy/service/DeviceCreateIdsServiceImpl.java

@@ -28,6 +28,7 @@ import org.springframework.web.bind.annotation.RequestBody;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 
 import static com.xy.utils.Beans.copy;
@@ -133,14 +134,12 @@ public class DeviceCreateIdsServiceImpl extends ServiceImpl<DeviceCreateIdsMappe
     @PostMapping("exportQrCode")
     @ApiOperation("导出二维码")
     public void exportQrCode(DeviceCreateIdsDto.ExportQrCode exportQrCode) {
-        List<String> list = null;
+        List<String> list = new ArrayList<>();
         Boolean isWhere = exportQrCode.getIsWhere() == null ? false : exportQrCode.getIsWhere();
         if (!isWhere) {
             List<Long> deviceIds = exportQrCode.getDeviceIds();
             if (Emptys.check(deviceIds)) {
-                for (Long aLong : deviceIds) {
-                    list.add(aLong.toString());
-                }
+                deviceIds.forEach(aLong -> list.add(aLong.toString()));
             }
         } else {
             LambdaQueryWrapper<DeviceCreateIds> lambdaQueryWrapper = new MybatisPlusQuery().eqWrapper(exportQrCode, DeviceCreateIds.class)