07 2022 档案

循环注意
摘要：int lineNum = 0; for (String key : titleMap.keySet()) {// row.createCell(lineNum).setCellValue(x.get(key)); listvalue.add(key); System.out.println(lin 阅读全文
posted @ 2022-07-29 14:58 cap_ys 阅读(22) 评论(0) 推荐(0)
springboot 事务注解
摘要：@Transactional(rollbackFor = Exception.class) 阅读全文
posted @ 2022-07-27 10:45 cap_ys 阅读(39) 评论(0) 推荐(0)
java list转map
摘要：energyMeterDeviceMap = energyMeterDeviceService.list().stream().collect(Collectors.toMap(x -> x.getDeviceId() , Function.identity()));//根据设备编码 阅读全文
posted @ 2022-07-27 09:54 cap_ys 阅读(33) 评论(0) 推荐(0)
java map差集，并集
摘要：public static void getDifferenceSetByGuava(Map<String, Object> bigMap, Map<String, String> smallMap, Map<String, Object> resMap) { Set<String> bigMapK 阅读全文
posted @ 2022-07-27 09:48 cap_ys 阅读(394) 评论(0) 推荐(0)
redis更新数据
摘要：/** * 更新redis数据 * * */ @Override public void updateRedis() { Map<String, CoreDevice> coreDeviceMap = new HashMap<>(); if (coreDeviceMap.isEmpty()) { c 阅读全文
posted @ 2022-07-26 11:10 cap_ys 阅读(1358) 评论(0) 推荐(0)
删除写入redis数据
摘要：@Override public void deleteRedis(String deviceId) { stringRedisTemplate.delete(deviceId); } @Override public void saveRedis(CoreDevice coreDevice) { 阅读全文
posted @ 2022-07-26 11:10 cap_ys 阅读(104) 评论(0) 推荐(0)
redis加缓存
摘要：@Overridepublic CoreDevice queryDeviceRedis(String deviceId) { String cachDevice = stringRedisTemplate.opsForValue().get(deviceId);//查询redis里面有没有缓存 // 阅读全文
posted @ 2022-07-26 11:09 cap_ys 阅读(110) 评论(0) 推荐(0)
筛选集合数据<java>
摘要：List<ResDevice> resDevices = resDeviceMapper.exportResDevices();List<ResDevice> exportList = new ArrayList<>(); String selections = request.getParamet 阅读全文
posted @ 2022-07-21 11:37 cap_ys 阅读(166) 评论(0) 推荐(0)
更新redis数据(java)
摘要：List<String> list=new ArrayList<>(); list.add("root"); for (int i = 0; i < list.size(); i++) { List values = redisTemplate.boundHashOps(list.get(i)).v 阅读全文
posted @ 2022-07-21 11:35 cap_ys 阅读(1057) 评论(0) 推荐(0)
mybatis-plus条件查询(java)
摘要：QueryWrapper<CoreCamera> queryWrapper = new QueryWrapper<>();//创建查询对象queryWrapper.select("is_remote_control").eq("stream",stream);//构建查询条件(返回特定字段,根据条件 阅读全文
posted @ 2022-07-19 14:46 cap_ys 阅读(238) 评论(0) 推荐(0)