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<h1>Upgrading to POI 3.5, including converting existing HSSF Usermodel code to SS Usermodel (for XSSF and HSSF)</h1>
<div id="front-matter"></div>
<a name="Things+that+have+to+be+changed+when+upgrading+to+POI+3.5"></a>
<h2 class="boxed">Things that have to be changed when upgrading to POI 3.5</h2>
<div class="section">
<p>Wherever possible, we have tried to ensure that you can use your
existing POI code with POI 3.5 without requiring any changes. However,
Java doesn't always make that easy, and unfortunately there are a
few changes that may be required for some users.</p>
<a name="org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator.CellValue"></a>
<h3 class="boxed">org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator.CellValue</h3>
<p>Annoyingly, java will not let you access a static inner class via
a child of the parent one. So, all references to
<em>org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator.CellValue</em>
will need to be changed to
<em>org.apache.poi.ss.usermodel.FormulaEvaluator.CellValue</em>
</p>
<a name="org.apache.poi.hssf.usermodel.HSSFRow.MissingCellPolicy"></a>
<h3 class="boxed">org.apache.poi.hssf.usermodel.HSSFRow.MissingCellPolicy</h3>
<p>Annoyingly, java will not let you access a static inner class via
a child of the parent one. So, all references to
<em>org.apache.poi.hssf.usermodel.HSSFRow.MissingCellPolicy</em>
will need to be changed to
<em>org.apache.poi.ss.usermodel.Row.MissingCellPolicy</em>
</p>
<a name="DDF+and+org.apache.poi.hssf.record.RecordFormatException"></a>
<h3 class="boxed">DDF and org.apache.poi.hssf.record.RecordFormatException</h3>
<p>Previously, record level errors within DDF would throw an
exception from the hssf class hierarchy. Now, record level errors
within DDF will throw a more general RecordFormatException,
<em>org.apache.poi.util.RecordFormatException</em>
</p>
<p>In addition, org.apache.poi.hssf.record.RecordFormatException
has been changed to inherit from the new
<em>org.apache.poi.util.RecordFormatException</em>, so you may
wish to change catches of the hssf version to the new util version.
</p>
</div>
<a name="Converting+existing+HSSF+Usermodel+code+to+SS+Usermodel+%28for+XSSF+and+HSSF%29"></a>
<h2 class="boxed">Converting existing HSSF Usermodel code to SS Usermodel (for XSSF and HSSF)</h2>
<div class="section">
<a name="Why+change%3F"></a>
<h3 class="boxed">Why change?</h3>
<p>If you have existing HSSF usermodel code that works just
fine, and you don't want to use the new OOXML XSSF support,
then you probably don't need to. Your existing HSSF only code
will continue to work just fine.</p>
<p>However, if you want to be able to work with both HSSF for
your .xls files, and also XSSF for .xslx files, then you will
need to make some slight tweaks to your code.</p>
<a name="org.apache.poi.ss.usermodel"></a>
<h3 class="boxed">org.apache.poi.ss.usermodel</h3>
<p>The new SS usermodel (org.apache.poi.ss.usermodel) is very
heavily based on the old HSSF usermodel
(org.apache.poi.hssf.usermodel). The main difference is that
the package name and class names have been tweaked to remove
HSSF from them. Otherwise, the new SS Usermodel interfaces
should provide the same functionality.</p>
<a name="Constructors"></a>
<h3 class="boxed">Constructors</h3>
<p>Calling the empty HSSFWorkbook remains as the way to
create a new, empty Workbook object. To open an existing
Workbook, you should now call WorkbookFactory.create(inp).</p>
<p>For all other cases when you would have called a
Usermodel constructor, such as 'new HSSFRichTextString()' or
'new HSSFDataFormat', you should instead use a CreationHelper.
There's a method on the Workbook to get a CreationHelper, and
the CreationHelper will then handle constructing new objects
for you.</p>
<a name="Other+Code"></a>
<h3 class="boxed">Other Code</h3>
<p>For all other code, generally change a reference from
org.apache.poi.hssf.usermodel.HSSFFoo to a reference to
org.apache.poi.ss.usermodel.Foo. Method signatures should
otherwise remain the same, and it should all then work for
both XSSF and HSSF.</p>
</div>
<a name="Worked+Examples"></a>
<h2 class="boxed">Worked Examples</h2>
<div class="section">
<a name="Old+HSSF+Code"></a>
<h3 class="boxed">Old HSSF Code</h3>
<div class="code">
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// import org.apache.poi.hssf.usermodel.*;</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFWorkbook wb = new HSSFWorkbook();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// create a new sheet</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFSheet s = wb.createSheet();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// declare a row object reference</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFRow r = null;</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// declare a cell object reference</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFCell c = null;</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// create 2 cell styles</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFCellStyle cs = wb.createCellStyle();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFCellStyle cs2 = wb.createCellStyle();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFDataFormat df = wb.createDataFormat();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// create 2 fonts objects</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFFont f = wb.createFont();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">HSSFFont f2 = wb.createFont();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Set font 1 to 12 point type, blue and bold</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f.setFontHeightInPoints((short) 12);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f.setColor( HSSFColor.RED.index );</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Set font 2 to 10 point type, red and bold</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f2.setFontHeightInPoints((short) 10);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f2.setColor( HSSFFont.RED.index );</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">f2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Set cell style and formatting</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">cs.setFont(f);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">cs.setDataFormat(df.getFormat("#,##0.0"));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Set the other cell style and formatting</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">cs2.setBorderBottom(cs2.BORDER_THIN);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">cs2.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">cs2.setFont(f2);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Define a few rows</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">for(short rownum = (short)0; rownum &lt; 30; rownum++) {</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> HSSFRow r = s.createRow(rownum);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> for(short cellnum = (short)0; cellnum &lt; 10; cellnum += 2) {</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> HSSFCell c = r.createCell(cellnum);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> HSSFCell c2 = r.createCell(cellnum+1);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> c.setCellValue((double)rownum + (cellnum/10));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> c2.setCellValue(new HSSFRichTextString("Hello! " + cellnum);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> }</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">}</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// Save</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">FileOutputStream out = new FileOutputStream("workbook.xls");</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">wb.write(out);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">out.close();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> </span>
</div>
</div>
<a name="New%2C+generic+SS+Usermodel+Code"></a>
<h3 class="boxed">New, generic SS Usermodel Code</h3>
<div class="code">
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">// import org.apache.poi.ss.usermodel.*;</span>
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<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">Workbook[] wbs = new Workbook[] { new HSSFWorkbook(), new XSSFWorkbook() };</span>
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<span class="lineno"></span><span class="codebody">for(int i=0; i&lt;wbs.length; i++) {</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> Workbook wb = wbs[i];</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> CreationHelper createHelper = wb.getCreationHelper();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
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<span class="lineno"></span><span class="codebody"> // create a new sheet</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> Sheet s = wb.createSheet();</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> // declare a row object reference</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> Row r = null;</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // declare a cell object reference</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> Cell c = null;</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // create 2 cell styles</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> CellStyle cs = wb.createCellStyle();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> CellStyle cs2 = wb.createCellStyle();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> DataFormat df = wb.createDataFormat();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // create 2 fonts objects</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> Font f = wb.createFont();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> Font f2 = wb.createFont();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Set font 1 to 12 point type, blue and bold</span>
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<div class="codeline">
<span class="lineno"></span><span class="codebody"> f.setFontHeightInPoints((short) 12);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> f.setColor( IndexedColors.RED.getIndex() );</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> f.setBoldweight(Font.BOLDWEIGHT_BOLD);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Set font 2 to 10 point type, red and bold</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> f2.setFontHeightInPoints((short) 10);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> f2.setColor( IndexedColors.RED.getIndex() );</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> f2.setBoldweight(Font.BOLDWEIGHT_BOLD);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Set cell style and formatting</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> cs.setFont(f);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> cs.setDataFormat(df.getFormat("#,##0.0"));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Set the other cell style and formatting</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> cs2.setBorderBottom(cs2.BORDER_THIN);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> cs2.setDataFormat(df.getFormat("text"));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> cs2.setFont(f2);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"></span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Define a few rows</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> for(int rownum = 0; rownum &lt; 30; rownum++) {</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> Row r = s.createRow(rownum);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> for(int cellnum = 0; cellnum &lt; 10; cellnum += 2) {</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> Cell c = r.createCell(cellnum);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> Cell c2 = r.createCell(cellnum+1);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> </span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> c.setCellValue((double)rownum + (cellnum/10));</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> c2.setCellValue(</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> createHelper.createRichTextString("Hello! " + cellnum)</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> );</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> }</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> }</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> </span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> // Save</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> String filename = "workbook.xls";</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> if(wb instanceof XSSFWorkbook) {</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> filename = filename + "x";</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> }</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> </span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> FileOutputStream out = new FileOutputStream(filename);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> wb.write(out);</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> out.close();</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody">}</span>
</div>
<div class="codeline">
<span class="lineno"></span><span class="codebody"> </span>
</div>
</div>
</div>
<p align="right">
<font size="-2">by&nbsp;Nick Burch</font>
</p>
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