Excel 工作表 POI 工作簿已包含工作表

Question

I'm getting this error :

the workbook already contains a sheet of this name

private void cleanDataSheets(XSSFWorkbook workbookTemplate) {
    int numberOfQueries = extraction.getQueries().size();
    // DATA[maxIndex][minIndex] --> ex : DATA00, DATA01, ..., DATA10
    int maxIndex = 0;
    int minIndex = 0;
    String sheetName = DATA_SHEET_NAME + maxIndex + minIndex;

    while (maxIndex < numberOfQueries) {
        Sheet sheet = workbookTemplate.getSheet(sheetName);

        if (sheet == null) {
            maxIndex++;
            minIndex = 0;

        } else {
            workbookTemplate.removeSheetAt(workbookTemplate.getSheetIndex(sheet));

            if (minIndex == 0) {
                if (workbookTemplate.getSheetIndex(sheetName) == -1) {
                    workbookTemplate.createSheet(sheetName);
                }

            }
            minIndex++;
        }
    }
}

The line if (workbookTemplate.getSheetIndex(sheetName)== -1) is supposed to check if the workbook already contains a sheet of this name but it doesn't work. I still have the error.

Thank you for your help !

Answer 1

Have you tried moving the String sheetName = ... inside your while loop?

The way you have done it, it always try to remove and recreate the same sheetName in every loop.

private void cleanDataSheets(XSSFWorkbook workbookTemplate) {
    int numberOfQueries = extraction.getQueries().size();
    // DATA[maxIndex][minIndex] --> ex : DATA00, DATA01, ..., DATA10
    int maxIndex = 0;
    int minIndex = 0;


    while (maxIndex < numberOfQueries) {
        String sheetName = DATA_SHEET_NAME + maxIndex + minIndex;
        Sheet sheet = workbookTemplate.getSheet(sheetName);

        if (sheet == null) {
            maxIndex++;
            minIndex = 0;

        } else {
            workbookTemplate.removeSheetAt(workbookTemplate.getSheetIndex(sheet));

            if (minIndex == 0) {
                if (workbookTemplate.getSheetIndex(sheetName)== -1){
                    workbookTemplate.createSheet(sheetName);
                }

            }
            minIndex++;
        }
    }
}