POINT columnItem.getDataLength() - 1

 iailab-module-model/iailab-module-model-biz/src/main/java/com/iailab/module/model/mdk/sample/SampleInfoConstructor.java

@@ -78,7 +78,8 @@
        Date dateTime = new Date();
        switch (ModelParamType.getEumByCode(columnItem.getParamType())) {
            case DATAPOINT:
                dateTime = calculateTime(originalTime, true, columnItem.getDataLength(), columnItem.getGranularity());
                dateTime = calculateTime(originalTime, true,
                        columnItem.getDataLength() > 1 ? (columnItem.getDataLength() - 1) : columnItem.getDataLength(), columnItem.getGranularity());
                break;
            case PLAN:
                dateTime = originalTime;
@@ -111,7 +112,7 @@
        calendar.setTime(originalTime);
        switch (ModelParamType.getEumByCode(columnItem.getParamType())) {
            case DATAPOINT:
                dateTime = calculateTime(originalTime, true, 1, columnItem.getGranularity());
                dateTime = calculateTime(originalTime, true, 0, columnItem.getGranularity());
                break;
            case PLAN:
                dateTime = calculateTime(originalTime, false, columnItem.getDataLength()-1, columnItem.getGranularity());