如何使用Apache poi库保护XSSFWorkbook中的工作表？

Question

How to protect worksheets in XSSFWorkbook using Apache poi library? I saw many solutions on SO and other sites but they are old or not working.

   <dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.15</version>
  </dependency>

Below is the sample code:

FileInputStream excelFile = new FileInputStream(new File(FILE_NAME));
        XSSFWorkbook workbook = new  XSSFWorkbook(FILE_NAME);
        XSSFSheet s = (XSSFSheet) workbook.getSheetAt(0);

        s.enableLocking();
        s.lockDeleteColumns(true);
        s.protectSheet("password");

        workbook.lockStructure();
        workbook.close();

Answer 1

After trying for hours I found the issue and it was very stupid mistake. workbook does not update itself, instead we have to create new workbook which will have the protected sheet.