poi XSSF HSSF

기존 버전 

// import org.apache.poi.hssf.usermodel.*;
 
HSSFWorkbook wb = new HSSFWorkbook();
// create a new sheet
HSSFSheet s = wb.createSheet();
// declare a row object reference
HSSFRow r = null;
// declare a cell object reference
HSSFCell c = null;
// create 2 cell styles
HSSFCellStyle cs = wb.createCellStyle();
HSSFCellStyle cs2 = wb.createCellStyle();
HSSFDataFormat df = wb.createDataFormat();
 
// create 2 fonts objects
HSSFFont f = wb.createFont();
HSSFFont f2 = wb.createFont();
 
// Set font 1 to 12 point type, blue and bold
f.setFontHeightInPoints((short) 12);
f.setColor( HSSFColor.RED.index );
f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 
// Set font 2 to 10 point type, red and bold
f2.setFontHeightInPoints((short) 10);
f2.setColor( HSSFFont.RED.index );
f2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 
// Set cell style and formatting
cs.setFont(f);
cs.setDataFormat(df.getFormat("#,##0.0"));
 
// Set the other cell style and formatting
cs2.setBorderBottom(cs2.BORDER_THIN);
cs2.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));
cs2.setFont(f2);
 
 
// Define a few rows
for(short rownum = (short)0; rownum < 30; rownum++) {
    HSSFRow r = s.createRow(rownum);
    for(short cellnum = (short)0; cellnum < 10; cellnum += 2) {
        HSSFCell c = r.createCell(cellnum);
        HSSFCell c2 = r.createCell(cellnum+1);
 
        c.setCellValue((double)rownum + (cellnum/10));
        c2.setCellValue(new HSSFRichTextString("Hello! " + cellnum);
    }
}
 
// Save
FileOutputStream out = new FileOutputStream("workbook.xls");
wb.write(out);
out.close();

new 버전

// import org.apache.poi.ss.usermodel.*;
 
Workbook[] wbs = new Workbook[] { new HSSFWorkbook(), new XSSFWorkbook() };
for(int i=0; i<wbs.length; i++) {
   Workbook wb = wbs[i];
   CreationHelper createHelper = wb.getCreationHelper();
 
   // create a new sheet
   Sheet s = wb.createSheet();
   // declare a row object reference
   Row r = null;
   // declare a cell object reference
   Cell c = null;
   // create 2 cell styles
   CellStyle cs = wb.createCellStyle();
   CellStyle cs2 = wb.createCellStyle();
   DataFormat df = wb.createDataFormat();
 
   // create 2 fonts objects
   Font f = wb.createFont();
   Font f2 = wb.createFont();
 
   // Set font 1 to 12 point type, blue and bold
   f.setFontHeightInPoints((short) 12);
   f.setColor( IndexedColors.RED.getIndex() );
   f.setBoldweight(Font.BOLDWEIGHT_BOLD);
 
   // Set font 2 to 10 point type, red and bold
   f2.setFontHeightInPoints((short) 10);
   f2.setColor( IndexedColors.RED.getIndex() );
   f2.setBoldweight(Font.BOLDWEIGHT_BOLD);
 
   // Set cell style and formatting
   cs.setFont(f);
   cs.setDataFormat(df.getFormat("#,##0.0"));
 
   // Set the other cell style and formatting
   cs2.setBorderBottom(cs2.BORDER_THIN);
   cs2.setDataFormat(df.getFormat("text"));
   cs2.setFont(f2);
 
 
   // Define a few rows
   for(int rownum = 0; rownum < 30; rownum++) {
       Row r = s.createRow(rownum);
       for(int cellnum = 0; cellnum < 10; cellnum += 2) {
           Cell c = r.createCell(cellnum);
           Cell c2 = r.createCell(cellnum+1);
   
           c.setCellValue((double)rownum + (cellnum/10));
           c2.setCellValue(
                 createHelper.createRichTextString("Hello! " + cellnum)
           );
       }
   }
   
   // Save
   String filename = "workbook.xls";
   if(wb instanceof XSSFWorkbook) {
     filename = filename + "x";
   }
 
   FileOutputStream out = new FileOutputStream(filename);
   wb.write(out);
   out.close();
}