Make column read-only using apache poi

Question

I am using apache-poi for generating the excel file. I need to make the 4th column read-only and the remaining 2 columns will be editable by the user.

I am using

Answer 1

Workbook wb = new HSSFWorkbook(); Sheet sheet =wb.createSheet(thismonth+" , "+thisYear); sheet.protectSheet("password");

the above makes the whole sheet un editable. if u want to make a particular column editable. assign a particular CellStyle to it. and make it editable by .setLocked(false);

Calendar cal = Calendar.getInstance();

    int lastdate = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
    
    String[] monthName = {"January", "February",
            "March", "April", "May", "June", "July",
            "August", "September", "October", "November",
            "December"};

    String thismonth = monthName[cal.get(Calendar.MONTH)];
    int thisYear = cal.get(Calendar.YEAR);
    Workbook wb = new HSSFWorkbook();
    Sheet sheet =wb.createSheet();
    sheet.protectSheet("password");// making the sheet uneaditable.(password 
   protected)

    CellStyle cs2 = wb.createCellStyle();
    cs2.setLocked(false); //cells with this style will be editable.
    cs2.setBorderBottom(BorderStyle.THICK);
    cs2.setBorderTop(BorderStyle.THICK);
    cs2.setBorderLeft(BorderStyle.THICK);
    cs2.setBorderRight(BorderStyle.THICK);
    cs2.setAlignment(HorizontalAlignment.CENTER);
    cs2.setVerticalAlignment(VerticalAlignment.CENTER);
    
    CellStyle cs3 = wb.createCellStyle();//cells with this style will not be editable
    cs3.setBorderBottom(BorderStyle.THICK);
    cs3.setBorderTop(BorderStyle.THICK);
    cs3.setBorderLeft(BorderStyle.THICK);
    cs3.setBorderRight(BorderStyle.THICK);
    cs3.setAlignment(HorizontalAlignment.CENTER);
    cs3.setVerticalAlignment(VerticalAlignment.CENTER);
    
    
    for (int r=2;r