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Thread: how to create excel file in java

  1. #1
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    Default how to create excel file in java

    please help me....................
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    Last edited by viral.bhat; March 30th, 2014 at 11:39 PM.


  2. #2
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    Default Re: how to create excel file in java

    If you are generating the excel in a browser just call the method you want to generate the excel file based on a url and set the response properties like this,
    //1.Fill the data from db
     
      //2.Set the response properties
      String fileName = "Excel.xls";
      response.setHeader("Content-Disposition", "inline; filename=" + fileName);
      // Make sure to set the correct content type(the below content type is ok)
      response.setContentType("application/vnd.ms-excel");
     
      //3.Write to the output stream
      Writer.write();//call write method of Writer class to write the data to o/p stream

    Writer Class:
    public class Writer {
     
         private static Logger logger = Logger.getLogger("service");
             /**
              * Writes the report to the output stream
              */
             public static void write(HttpServletResponse response, HSSFSheet worksheet) {
     
              logger.debug("Writing excel data to the stream");
                  try {
                       // Retrieve the output stream
                       ServletOutputStream outputStream = response.getOutputStream();
                       // Write to the output stream
                       worksheet.getWorkbook().write(outputStream);
                       // Flush the stream
                       outputStream.flush();
                  } 
                  catch (Exception e) {
                      logger.error("Unable to write excel data to the output stream");
                  }
         }
    }

  3. #3
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    Default Re: how to create excel file in java

    You can read the article

    try {
    File file = new File(mFile);
    XSSFWorkbook wb;
    XSSFSheet sheet;
    XSSFRow row;
    XSSFCell cell;
    int rowIndex = 0;

    if (file.exists()) {
    InputStream excelFile = new FileInputStream(file);
    wb = new XSSFWorkbook(excelFile);
    sheet = wb.getSheetAt(0);
    rowIndex = sheet.getLastRowNum();
    rowIndex += 1;

    row = sheet.createRow(rowIndex);
    }
    else {
    wb = new XSSFWorkbook();
    sheet = wb.createSheet();
    row = sheet.createRow(0);
    cell = row.createCell(0);
    cell.setCellValue("1");
    cell = row.createCell(1);
    cell.setCellValue("2");
    cell = row.createCell(2);
    cell.setCellValue("3");

    row = sheet.createRow(1);
    }
    cell = row.createCell(0);
    cell.setCellValue("data");

    FileOutputStream out = new FileOutputStream(mFile);
    wb.write(out);
    out.flush();
    out.close();
    }
    catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    Last edited by copeg; March 31st, 2014 at 11:12 AM. Reason: Removed link

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    Default Re: how to create excel file in java

    @Cheungxin and @yushulx, welcome to the forums. Please read the forum guidelines and The Problem with Spoon-feeding - your posts can not only be considered as such, but are also out of context (servlets?) and neglect to mention any required 3rd party libraries.

    I recommend the original poster go to the source of the required 3rd party library required to run any code in the replies of this thread...a library which has ample examples to get one started: Apache POI

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