java----js常用的api

时间函数

获取当前时间: DateUtil.today()

String today=DateUtil.today()
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String today = “2024-02-01”;

时间偏移

往前30天

DateTime parseDateUtil.offsetDay(DateUtil.parse(DateUtil.today()), -30)
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String  today =DateUtil.formatDate(DateUtil.offsetDay(DateUtil.parse(DateUtil.today()), -45));
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字符换时间格式化

DateTime parse = DateUtil.parse(DateUtil.today());
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String  today =DateUtil.formatDate(parse)
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map.computeIfAbsent添加list

postIdMap.computeIfAbsent(dingDaykey.getPostId(), k -> new LinkedList<>()).add(dingDaykey);
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优化前

DayEntity dayEntity = lkeyMap.get(line);
if (dayEntity == null) {
    dayEntity = new DayEntity();
}
dayEntity.setName(line);
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优化后

DayEntity dayEntity = lkeyMap.computeIfAbsent(line, DayEntity::new);
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优化前

            List<DataListMxfEntity> data = dayEntity.getData();
            if (data == null) {
                data = new ArrayList<>();
            }
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优化后

List<DataListMxfEntity> data = Optional.ofNullable(dayEntity.getData()).orElseGet(ArrayList::new);
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优化前

            List<AgvSg03PsPlcItemHistoryDO> agvSg03PsPlcItemHistoryDOS1 = batteryIdMapList.get(batteryId);
            if (agvSg03PsPlcItemHistoryDOS1 == null) {
                agvSg03PsPlcItemHistoryDOS1 = new ArrayList<>();
            }
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优化后

            List<AgvSg03PsPlcItemHistoryDO> agvSg03PsPlcItemHistoryDOS1 = Optional.ofNullable(batteryIdMapList.get(batteryId))
                    .orElseGet(ArrayList::new);
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相对路径的api

        String fileName = "1.json";
        String currentFilePath = new Object(){}.getClass().getEnclosingClass().getResource("").getPath()+fileName;
        String substring = currentFilePath.replaceAll("target/test-classes", "src/test/java").substring(1);
        String jsonPath = substring;
        System.out.println("jsonPath = " + jsonPath);
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控制台输出:
jsonPath = D:/desktop/xiangmu/doc_translation/src/test/java/com/example/dxw/1.json