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Thread: set Background Excel cell color using POI API

  1. #1
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    Default set Background Excel cell color using POI API

    Hi,

    It's my first time to use the POI API,
    I'm trying to change the background color of a cell but it won't change,
    although all other features in the HSSFCellStyle I used like borders and alignment worked perfectly, here's the code:

    HSSFCellStyle titleStyle = xls_workbook.createCellStyle();
    titleStyle.setFillBackgroundColor(HSSFColor.GREY_2 5_PERCENT.index);
    titleStyle.setAlignment(CellStyle.ALIGN_CENTER);
    titleStyle.setBorderBottom(CellStyle.BORDER_MEDIUM );
    titleStyle.setBorderLeft(CellStyle.BORDER_MEDIUM);
    titleStyle.setBorderRight(CellStyle.BORDER_MEDIUM) ;
    titleStyle.setBorderTop(CellStyle.BORDER_MEDIUM);

    Font titleFont = xls_workbook.createFont();
    titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
    titleStyle.setFont(titleFont);

    /***********************************/
    HSSFRow row = xls_sheet1.createRow((short)0);
    HSSFCell cells[]=new HSSFCell[columns];

    for(int i=0;i<columns;i++)
    {
    cells[i]=row.createCell(i);
    cells[i].setCellStyle(titleStyle);
    }

    cells[0].setCellValue("Time Relative");
    cells[1].setCellValue("I/O");
    cells[2].setCellValue("Signal Name");
    cells[3].setCellValue("Value to be set/checked");
    cells[4].setCellValue("Time Tolerance");
    cells[5].setCellValue("Comparison Type");
    cells[6].setCellValue("Comment");

    for(int i=0;i<columns;i++)
    {
    xls_sheet1.autoSizeColumn((short)i);
    }


    xls_workbook.write(xlsFileOut);
    xlsFileOut.close();


  2. #2
    Super Moderator copeg's Avatar
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    Default Re: set Background Excel cell color using POI API

    Try calling Cell.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND )
    FWIW I recall having an issue with this in that the background fill color resulted in a black cell - always. I can't remember the situation but if you experience this, I believe it to be a reported bug in POI. You can use the foreground color or use an XSSF sheet (which resolved the issue for me).
    Last edited by copeg; March 25th, 2011 at 07:07 PM.

  3. #3
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    Default Re: set Background Excel cell color using POI API

    Thanks for your help
    I tried to use the XSSF sheet instead as you suggested but I was faced with the following error even after adding log4J classpath

    Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException
    at tsxml_xls_generator.Generator.<init>(Generator.jav a:58)
    at tsxml_xls_generator.Main.main(Main.java:21)
    Java Result: 1

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