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excel poi 处理2

brock — Tue, 19 Sep 2006 07:59:00 GMT

在导出数据生成excel�Ӟ��定义excel单元格格式�ؓ文本�?br />最好拿你的导出代码贴出来看看，主要是生成excel时代�?br />
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参考一�?
<% @ page contentType = " text/html; charset=gb2312 " %>
<% @ page import = " java.io.* " %>
<% @ page import = " org.apache.poi.hssf.util.HSSFColor " %>
<% @ page import = " org.apache.poi.hssf.util.Region " %>
<% @ page import = " org.apache.poi.hssf.usermodel.* " %>
<%
// 初始�?br /> // 工作��?/span>
HSSFWorkbook wb = new HSSFWorkbook();
// 工作�?/span>
HSSFSheet sheet = wb.createSheet();
wb.setSheetName( 0 , " Excel演示! " ,HSSFWorkbook.ENCODING_UTF_16);
// 准备完成
// 建样�?br /> // 标题�?/span>
HSSFFont font_Header = wb.createFont();
font_Header.setFontName( " headerFont " );
font_Header.setFontHeightInPoints(( short ) 12 );
HSSFCellStyle cellStyle_Header = wb.createCellStyle();
cellStyle_Header.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle_Header.setFont(font_Header);
// 通用�?/span>
HSSFCellStyle cellStyle_Normal = wb.createCellStyle();
cellStyle_Normal.setAlignment(HSSFCellStyle.ALIGN_LEFT);
// cellStyle_Normal.setBorderBottom(HSSFCellStyle.BORDER_THIN);
// cellStyle_Normal.setBorderLeft(HSSFCellStyle.BORDER_THIN);
// cellStyle_Normal.setBorderRight(HSSFCellStyle.BORDER_THIN);
// cellStyle_Normal.setBorderTop(HSSFCellStyle.BORDER_THIN);
// 表格�?/span>
HSSFCellStyle cellStyle_Column = wb.createCellStyle();
cellStyle_Column.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle_Column.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
cellStyle_Column.setBorderBottom(HSSFCellStyle.BORDER_THIN);
cellStyle_Column.setBorderLeft(HSSFCellStyle.BORDER_THIN);
cellStyle_Column.setBorderRight(HSSFCellStyle.BORDER_THIN);
cellStyle_Column.setBorderTop(HSSFCellStyle.BORDER_THIN);
cellStyle_Column.setFillPattern(HSSFCellStyle.BIG_SPOTS);
cellStyle_Column.setFillBackgroundColor(( short )HSSFColor.WHITE.index);
cellStyle_Column.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
// 数据�?/span>
HSSFCellStyle cellStyle_Cell = wb.createCellStyle();
cellStyle_Cell.setAlignment(HSSFCellStyle.ALIGN_LEFT);
cellStyle_Cell.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
cellStyle_Cell.setBorderBottom(HSSFCellStyle.BORDER_THIN);
cellStyle_Cell.setBorderLeft(HSSFCellStyle.BORDER_THIN);
cellStyle_Cell.setBorderRight(HSSFCellStyle.BORDER_THIN);
cellStyle_Cell.setBorderTop(HSSFCellStyle.BORDER_THIN);
cellStyle_Cell.setWrapText( true );
// 样式�l�束
// �|�标�?/span>
HSSFRow row = sheet.createRow(( short ) 0 );
HSSFCell cell = row.createCell(( short ) 0 );
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " Excel演示! " );
sheet.addMergedRegion( new Region( 0 ,( short ) 0 , 0 ,( short ) 5 ));
cell.setCellStyle(cellStyle_Header);
// 完成标题
// 行信�?/span>
row = sheet.createRow(( short ) 1 );
cell = row.createCell(( short ) 0 );
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " FieldName " );
cell.setCellStyle(cellStyle_Normal);
cell = row.createCell(( short ) 1 );
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " FieldValue " );
sheet.addMergedRegion( new Region( 1 ,( short ) 1 , 1 ,( short ) 2 ));
cell.setCellStyle(cellStyle_Normal);
cell = row.createCell(( short ) 3 );
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " FieldName " );
cell.setCellStyle(cellStyle_Normal);
cell = row.createCell(( short ) 4 );
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " FieldValue " );
sheet.addMergedRegion( new Region( 1 ,( short ) 4 , 1 ,( short ) 5 ));
cell.setCellStyle(cellStyle_Normal);
// 表数�?/span>
for ( int mIndex = 2 ;mIndex < 10 ;mIndex ++ )
{
row = sheet.createRow(( short )mIndex);
for ( int nIndex = 0 ;nIndex < 6 ;nIndex ++ )
{
cell = row.createCell(( short )nIndex);
cell.setEncoding(HSSFWorkbook.ENCODING_UTF_16);
cell.setCellValue( " 00.00 " );
cell.setCellStyle(cellStyle_Cell);
}
}
// 全局�?/span>
sheet.setHorizontallyCenter( true );
for ( int kIndex = 0 ;kIndex < 10 ;kIndex ++ )
{
sheet.setColumnWidth(( short )kIndex,( short ) 4500 );
}
sheet.setMargin(HSSFSheet.BottomMargin,( double ) 0.5 );
sheet.setMargin(HSSFSheet.LeftMargin,( double ) 0.1 );
sheet.setMargin(HSSFSheet.RightMargin,( double ) 0.1 );
sheet.setMargin(HSSFSheet.TopMargin,( double ) 0.5 );
// 调整�l�束
// 输出Excel
OutputStream outData = null ;
outData = response.getOutputStream();
response.setContentType( " application/vnd.ms-excel " );
wb.write(outData);
outData.flush();
response.flushBuffer();
// 完成
%>

brock 2006-09-19 15:59 发表评论

Busy Developers' Guide to HSSF Features (说明�?

brock — Thu, 14 Sep 2006 08:47:00 GMT

Features

New Workbook

    //创徏新的Excel 工作��?br />    HSSFWorkbook wb = new HSSFWorkbook();
     //new 一个FileOutputStream 
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
     //写入��?
    wb.write(fileOut); 
    fileOut.close();

New Sheet

    HSSFWorkbook wb = new HSSFWorkbook();
　  // 如要新徏一名�ؓ"效益指标"的工作表�Q�其语句为：
  　// HSSFSheet sheet = workbook.createSheet("效益指标");

    HSSFSheet sheet1 = wb.createSheet("new sheet");
    HSSFSheet sheet2 = wb.createSheet("second sheet");
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Creating Cells

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    // Create a row and put some cells in it. Rows are 0 based.

     //创徏一行�ƈ放一些元素�?,0是�v始行
    HSSFRow row = sheet.createRow((short)0);
    // Create a cell and put a value in it.
     创徏一个单元格 
    HSSFCell cell = row.createCell((short)0);
    cell.setCellValue(1);

    // Or do it on one line.
     创徏单元��g��可以一行代�?
    row.createCell((short)1).setCellValue(1.2);
    row.createCell((short)2).setCellValue("This is a string");
    row.createCell((short)3).setCellValue(true);

    // Write the output to a file
     
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Creating Date Cells

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    // Create a row and put some cells in it. Rows are 0 based.
    HSSFRow row = sheet.createRow((short)0);

    // Create a cell and put a date value in it.  The first cell is not styled
    // as a date.
    HSSFCell cell = row.createCell((short)0);
    cell.setCellValue(new Date());

    // we style the second cell as a date (and time).  It is important to
    // create a new cell style from the workbook otherwise you can end up
    // modifying the built in style and effecting not only this cell but other cells.
    HSSFCellStyle cellStyle = wb.createCellStyle();
    cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
    cell = row.createCell((short)1);
    cell.setCellValue(new Date());
    cell.setCellStyle(cellStyle);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Working with different types of cells不同�c�d��的单元格一起工�?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");
    HSSFRow row = sheet.createRow((short)2);
    row.createCell((short) 0).setCellValue(1.1);
    row.createCell((short) 1).setCellValue(new Date());
    row.createCell((short) 2).setCellValue("a string");
    row.createCell((short) 3).setCellValue(true);
    row.createCell((short) 4).setCellType(HSSFCell.CELL_TYPE_ERROR);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Demonstrates various alignment options�C��不同的对齐选项

    public static void main(String[] args)
            throws IOException
    {
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("new sheet");
        HSSFRow row = sheet.createRow((short) 2);
        createCell(wb, row, (short) 0, HSSFCellStyle.ALIGN_CENTER);
        createCell(wb, row, (short) 1, HSSFCellStyle.ALIGN_CENTER_SELECTION);
        createCell(wb, row, (short) 2, HSSFCellStyle.ALIGN_FILL);
        createCell(wb, row, (short) 3, HSSFCellStyle.ALIGN_GENERAL);
        createCell(wb, row, (short) 4, HSSFCellStyle.ALIGN_JUSTIFY);
        createCell(wb, row, (short) 5, HSSFCellStyle.ALIGN_LEFT);
        createCell(wb, row, (short) 6, HSSFCellStyle.ALIGN_RIGHT);

        // Write the output to a file
        FileOutputStream fileOut = new FileOutputStream("workbook.xls");
        wb.write(fileOut);
        fileOut.close();

    }

    /**
     * Creates a cell and aligns it a certain way.
     *
     * @param wb        the workbook
     * @param row       the row to create the cell in
     * @param column    the column number to create the cell in
     * @param align     the alignment for the cell.
     */
    private static void createCell(HSSFWorkbook wb, HSSFRow row, short column, short align)
    {
        HSSFCell cell = row.createCell(column);
        cell.setCellValue("Align It");
        HSSFCellStyle cellStyle = wb.createCellStyle();
        cellStyle.setAlignment(align);
        cell.setCellStyle(cellStyle);
    }

Working with borders讄��Ҏ(gu��)��

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    // Create a row and put some cells in it. Rows are 0 based.
    HSSFRow row = sheet.createRow((short) 1);

    // Create a cell and put a value in it.
    HSSFCell cell = row.createCell((short) 1);
    cell.setCellValue(4);

    // Style the cell with borders all around.
    HSSFCellStyle style = wb.createCellStyle();
    style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
    style.setBottomBorderColor(HSSFColor.BLACK.index);
    style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
    style.setLeftBorderColor(HSSFColor.GREEN.index);
    style.setBorderRight(HSSFCellStyle.BORDER_THIN);
    style.setRightBorderColor(HSSFColor.BLUE.index);
    style.setBorderTop(HSSFCellStyle.BORDER_MEDIUM_DASHED);
    style.setTopBorderColor(HSSFColor.BLACK.index);
    cell.setCellStyle(style);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Fills and colors填充 �?颜色

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    // Create a row and put some cells in it. Rows are 0 based.
    HSSFRow row = sheet.createRow((short) 1);

    // Aqua background
    HSSFCellStyle style = wb.createCellStyle();
    style.setFillBackgroundColor(HSSFColor.AQUA.index);
    style.setFillPattern(HSSFCellStyle.BIG_SPOTS);
    HSSFCell cell = row.createCell((short) 1);
    cell.setCellValue("X");
    cell.setCellStyle(style);

    // Orange "foreground", foreground being the fill foreground not the font color.
    style = wb.createCellStyle();
    style.setFillForegroundColor(HSSFColor.ORANGE.index);
    style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
    cell = row.createCell((short) 2);
    cell.setCellValue("X");
    cell.setCellStyle(style);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Merging cells 合�ƈ单元�?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    HSSFRow row = sheet.createRow((short) 1);
    HSSFCell cell = row.createCell((short) 1);
    cell.setCellValue("This is a test of merging");

    sheet.addMergedRegion(new Region(1,(short)1,1,(short)2));

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Working with fonts 字体

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    // Create a row and put some cells in it. Rows are 0 based.
    HSSFRow row = sheet.createRow((short) 1);

    // Create a new font and alter it.
    HSSFFont font = wb.createFont();
    font.setFontHeightInPoints((short)24);
    font.setFontName("Courier New");
    font.setItalic(true);
    font.setStrikeout(true);

    // Fonts are set into a style so create a new one to use.
    HSSFCellStyle style = wb.createCellStyle();
    style.setFont(font);

    // Create a cell and put a value in it.
    HSSFCell cell = row.createCell((short) 1);
    cell.setCellValue("This is a test of fonts");
    cell.setCellStyle(style);

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Custom colors 自定义颜�?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet();
    HSSFRow row = sheet.createRow((short) 0);
    HSSFCell cell = row.createCell((short) 0);
    cell.setCellValue("Default Palette");

    //apply some colors from the standard palette,
    // as in the previous examples.
    //we'll use red text on a lime background

    HSSFCellStyle style = wb.createCellStyle();
    style.setFillForegroundColor(HSSFColor.LIME.index);
    style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

    HSSFFont font = wb.createFont();
    font.setColor(HSSFColor.RED.index);
    style.setFont(font);

    cell.setCellStyle(style);

    //save with the default palette
    FileOutputStream out = new FileOutputStream("default_palette.xls");
    wb.write(out);
    out.close();

    //now, let's replace RED and LIME in the palette
    // with a more attractive combination
    // (lovingly borrowed from freebsd.org)

    cell.setCellValue("Modified Palette");

    //creating a custom palette for the workbook
    HSSFPalette palette = wb.getCustomPalette();

    //replacing the standard red with freebsd.org red
    palette.setColorAtIndex(HSSFColor.RED.index,
            (byte) 153,  //RGB red (0-255)
            (byte) 0,    //RGB green
            (byte) 0     //RGB blue
    );
    //replacing lime with freebsd.org gold
    palette.setColorAtIndex(HSSFColor.LIME.index, (byte) 255, (byte) 204, (byte) 102);

    //save with the modified palette
    // note that wherever we have previously used RED or LIME, the
    // new colors magically appear
    out = new FileOutputStream("modified_palette.xls");
    wb.write(out);
    out.close();

Reading and Rewriting Workbooks ��d�� 重写工作��?/h2>

    POIFSFileSystem fs      =
            new POIFSFileSystem(new FileInputStream("workbook.xls"));
    HSSFWorkbook wb = new HSSFWorkbook(fs);
    HSSFSheet sheet = wb.getSheetAt(0);
    HSSFRow row = sheet.getRow(2);
    HSSFCell cell = row.getCell((short)3);
    if (cell == null)
        cell = row.createCell((short)3);
    cell.setCellType(HSSFCell.CELL_TYPE_STRING);
    cell.setCellValue("a test");

    // Write the output to a file
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Using newlines in cells 换行

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet s = wb.createSheet();
    HSSFRow r = null;
    HSSFCell c = null;
    HSSFCellStyle cs = wb.createCellStyle();
    HSSFFont f = wb.createFont();
    HSSFFont f2 = wb.createFont();

    cs = wb.createCellStyle();

    cs.setFont( f2 );
    //Word Wrap MUST be turned on
    cs.setWrapText( true );

    r = s.createRow( (short) 2 );
    r.setHeight( (short) 0x349 );
    c = r.createCell( (short) 2 );
    c.setCellType( HSSFCell.CELL_TYPE_STRING );
    c.setCellValue( "Use \n with word wrap on to create a new line" );
    c.setCellStyle( cs );
    s.setColumnWidth( (short) 2, (short) ( ( 50 * 8 ) / ( (double) 1 / 20 ) ) );

    FileOutputStream fileOut = new FileOutputStream( "workbook.xls" );
    wb.write( fileOut );
    fileOut.close();

Data Formats 数据格式

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("format sheet");
    HSSFCellStyle style;
    HSSFDataFormat format = wb.createDataFormat();
    HSSFRow row;
    HSSFCell cell;
    short rowNum = 0;
    short colNum = 0;

    row = sheet.createRow(rowNum++);
    cell = row.createCell(colNum);
    cell.setCellValue(11111.25);
    style = wb.createCellStyle();
    style.setDataFormat(format.getFormat("0.0"));
    cell.setCellStyle(style);

    row = sheet.createRow(rowNum++);
    cell = row.createCell(colNum);
    cell.setCellValue(11111.25);
    style = wb.createCellStyle();
    style.setDataFormat(format.getFormat("#,##0.0000"));
    cell.setCellStyle(style);

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Fit Sheet to One Page 一��中显视合适的工作�?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("format sheet");
    HSSFPrintSetup ps = sheet.getPrintSetup();
    
    sheet.setAutobreaks(true);
    
    ps.setFitHeight((short)1);
    ps.setFitWidth((short)1);


    // Create various cells and rows for spreadsheet.

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Set Print Area 讄��打印�?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("Sheet1");
    wb.setPrintArea(0, "$A$1:$C$2");
    //sets the print area for the first sheet
    //Alternatively:
    //wb.setPrintArea(0, 0, 1, 0, 0) is equivalent to using the name reference (See the JavaDocs for more details)  

    // Create various cells and rows for spreadsheet.

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Set Page Numbers on Footer 讄��|�� 在页用中

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("format sheet");
    HSSFFooter footer = sheet.getFooter()
    
    footer.setRight( "Page " + HSSFFooter.page() + " of " + HSSFFooter.numPages() );
    


    // Create various cells and rows for spreadsheet.

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Using the Convenience Functions 行用方便的方�?/h2>

The convenience functions live in contrib and provide utility features such as setting borders around merged regions and changing style attributes without explicitly creating new styles.

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet( "new sheet" );

    // Create a merged region
    HSSFRow row = sheet1.createRow( (short) 1 );
    HSSFRow row2 = sheet1.createRow( (short) 2 );
    HSSFCell cell = row.createCell( (short) 1 );
    cell.setCellValue( "This is a test of merging" );
    Region region = new Region( 1, (short) 1, 4, (short) 4 );
    sheet1.addMergedRegion( region );

    // Set the border and border colors.
    final short borderMediumDashed = HSSFCellStyle.BORDER_MEDIUM_DASHED;
    HSSFRegionUtil.setBorderBottom( borderMediumDashed,
        region, sheet1, wb );
    HSSFRegionUtil.setBorderTop( borderMediumDashed,
        region, sheet1, wb );
    HSSFRegionUtil.setBorderLeft( borderMediumDashed,
        region, sheet1, wb );
    HSSFRegionUtil.setBorderRight( borderMediumDashed,
        region, sheet1, wb );
    HSSFRegionUtil.setBottomBorderColor(HSSFColor.AQUA.index, region, sheet1, wb);
    HSSFRegionUtil.setTopBorderColor(HSSFColor.AQUA.index, region, sheet1, wb);
    HSSFRegionUtil.setLeftBorderColor(HSSFColor.AQUA.index, region, sheet1, wb);
    HSSFRegionUtil.setRightBorderColor(HSSFColor.AQUA.index, region, sheet1, wb);

    // Shows some usages of HSSFCellUtil
    HSSFCellStyle style = wb.createCellStyle();
    style.setIndention((short)4);
    HSSFCellUtil.createCell(row, 8, "This is the value of the cell", style);
    HSSFCell cell2 = HSSFCellUtil.createCell( row2, 8, "This is the value of the cell");
    HSSFCellUtil.setAlignment(cell2, wb, HSSFCellStyle.ALIGN_CENTER);

    // Write out the workbook
    FileOutputStream fileOut = new FileOutputStream( "workbook.xls" );
    wb.write( fileOut );
    fileOut.close();

Shift rows up or down on a sheet

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("row sheet");

    // Create various cells and rows for spreadsheet.

    // Shift rows 6 - 11 on the spreadsheet to the top (rows 0 - 5)
    sheet.shiftRows(5, 10, -5);

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Set a sheet as selected 讄��Z��?/h2>

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("row sheet");
    sheet.setSelected(true);

    // Create various cells and rows for spreadsheet.

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Set the zoom magnification讄��攑֤��?/h2>

The zoom is expressed as a fraction. For example to express a zoom of 75% use 3 for the numerator and 4 for the denominator.

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet("new sheet");
    sheet1.setZoom(3,4);   // 75 percent magnification
    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Splits and freeze panes

There are two types of panes you can create; freeze panes and split panes.

A freeze pane is split by columns and rows. You create a freeze pane using the following mechanism:

sheet1.createFreezePane( 3, 2, 3, 2 );

The first two parameters are the columns and rows you wish to split by. The second two parameters indicate the cells that are visible in the bottom right quadrant.

Split pains appear differently. The split area is divided into four separate work area's. The split occurs at the pixel level and the user is able to adjust the split by dragging it to a new position.

Split panes are created with the following call:

sheet2.createSplitPane( 2000, 2000, 0, 0, HSSFSheet.PANE_LOWER_LEFT );

The first parameter is the x position of the split. This is in 1/20th of a point. A point in this case seems to equate to a pixel. The second parameter is the y position of the split. Again in 1/20th of a point.

The last parameter indicates which pane currently has the focus. This will be one of HSSFSheet.PANE_LOWER_LEFT, PANE_LOWER_RIGHT, PANE_UPPER_RIGHT or PANE_UPPER_LEFT.

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet("new sheet");
    HSSFSheet sheet2 = wb.createSheet("second sheet");
    HSSFSheet sheet3 = wb.createSheet("third sheet");
    HSSFSheet sheet4 = wb.createSheet("fourth sheet");

    // Freeze just one row
    sheet1.createFreezePane( 0, 1, 0, 1 );
    // Freeze just one column
    sheet2.createFreezePane( 1, 0, 1, 0 );
    // Freeze the columns and rows (forget about scrolling position of the lower right quadrant).
    sheet3.createFreezePane( 2, 2 );
    // Create a split with the lower left side being the active quadrant
    sheet4.createSplitPane( 2000, 2000, 0, 0, HSSFSheet.PANE_LOWER_LEFT );

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Repeating rows and columns

It's possible to set up repeating rows and columns in your printouts by using the setRepeatingRowsAndColumns() function in the HSSFWorkbook class.

This function Contains 5 parameters. The first parameter is the index to the sheet (0 = first sheet). The second and third parameters specify the range for the columns to repreat. To stop the columns from repeating pass in -1 as the start and end column. The fourth and fifth parameters specify the range for the rows to repeat. To stop the columns from repeating pass in -1 as the start and end rows.

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet("new sheet");
    HSSFSheet sheet2 = wb.createSheet("second sheet");

    // Set the columns to repeat from column 0 to 2 on the first sheet
    wb.setRepeatingRowsAndColumns(0,0,2,-1,-1);
    // Set the the repeating rows and columns on the second sheet.
    wb.setRepeatingRowsAndColumns(1,4,5,1,2);

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Headers and Footers ��头 �?��脚

Example is for headers but applies directly to footers.

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("new sheet");

    HSSFHeader header = sheet.getHeader();
    header.setCenter("Center Header");
    header.setLeft("Left Header");
    header.setRight(HSSFHeader.font("Stencil-Normal", "Italic") + 
                    HSSFHeader.fontSize((short) 16) + "Right w/ Stencil-Normal Italic font and size 16");

    FileOutputStream fileOut = new FileOutputStream("workbook.xls");
    wb.write(fileOut);
    fileOut.close();

Drawing Shapes

POI supports drawing shapes using the Microsoft Office drawing tools. Shapes on a sheet are organized in a hiearchy of groups and and shapes. The top-most shape is the patriarch. This is not visisble on the sheet at all. To start drawing you need to call createPatriarch on the HSSFSheet class. This has the effect erasing any other shape information stored in that sheet. By default POI will leave shape records alone in the sheet unless you make a call to this method.

To create a shape you have to go through the following steps:

Create the patriarch.
Create an anchor to position the shape on the sheet.
Ask the patriarch to create the shape.
Set the shape type (line, oval, rectangle etc...)
Set any other style details converning the shape. (eg: line thickness, etc...)

    HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
    a = new HSSFClientAnchor( 0, 0, 1023, 255, (short) 1, 0, (short) 1, 0 );
    HSSFSimpleShape shape1 = patriarch.createSimpleShape(a1);
    shape1.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);

Text boxes are created using a different call:

    HSSFTextbox textbox1 = patriarch.createTextbox(
            new HSSFClientAnchor(0,0,0,0,(short)1,1,(short)2,2));
    textbox1.setString(new HSSFRichTextString("This is a test") );

It's possible to use different fonts to style parts of the text in the textbox. Here's how:

    HSSFFont font = wb.createFont();
    font.setItalic(true);
    font.setUnderline(HSSFFont.U_DOUBLE);
    HSSFRichTextString string = new HSSFRichTextString("Woo!!!");
    string.applyFont(2,5,font);
    textbox.setString(string );

Just as can be done manually using Excel, it is possible to group shapes together. This is done by calling createGroup() and then creating the shapes using those groups.

It's also possible to create groups within groups.

Warning

Any group you create should contain at least two other shapes or subgroups.

Here's how to create a shape group:

    // Create a shape group.
    HSSFShapeGroup group = patriarch.createGroup(
            new HSSFClientAnchor(0,0,900,200,(short)2,2,(short)2,2));

    // Create a couple of lines in the group.
    HSSFSimpleShape shape1 = group.createShape(new HSSFChildAnchor(3,3,500,500));
    shape1.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);
    ( (HSSFChildAnchor) shape1.getAnchor() ).setAnchor((short)3,3,500,500);
    HSSFSimpleShape shape2 = group.createShape(new HSSFChildAnchor((short)1,200,400,600));
    shape2.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);

If you're being observant you'll noticed that the shapes that are added to the group use a new type of anchor: the HSSFChildAnchor. What happens is that the created group has it's own coordinate space for shapes that are placed into it. POI defaults this to (0,0,1023,255) but you are able to change it as desired. Here's how:

    myGroup.setCoordinates(10,10,20,20); // top-left, bottom-right

If you create a group within a group it's also going to have it's own coordinate space.

Styling Shapes

By default shapes can look a little plain. It's possible to apply different styles to the shapes however. The sorts of things that can currently be done are:

Change the fill color.
Make a shape with no fill color.
Change the thickness of the lines.
Change the style of the lines. Eg: dashed, dotted.
Change the line color.

Here's an examples of how this is done:

    HSSFSimpleShape s = patriarch.createSimpleShape(a);
    s.setShapeType(HSSFSimpleShape.OBJECT_TYPE_OVAL);
    s.setLineStyleColor(10,10,10);
    s.setFillColor(90,10,200);
    s.setLineWidth(HSSFShape.LINEWIDTH_ONE_PT * 3);
    s.setLineStyle(HSSFShape.LINESTYLE_DOTSYS);

Shapes and Graphics2d

While the native POI shape drawing commands are the recommended way to draw shapes in a shape it's sometimes desirable to use a standard API for compatibility with external libraries. With this in mind we created some wrappers for Graphics and Graphics2d.

Warning

It's important to not however before continuing that Graphics2d is a poor match to the capabilities of the Microsoft Office drawing commands. The older Graphics class offers a closer match but is still a square peg in a round hole.

All Graphics commands are issued into an HSSFShapeGroup. Here's how it's done:

    a = new HSSFClientAnchor( 0, 0, 1023, 255, (short) 1, 0, (short) 1, 0 );
    group = patriarch.createGroup( a );
    group.setCoordinates( 0, 0, 80 * 4 , 12 * 23  );
    float verticalPointsPerPixel = a.getAnchorHeightInPoints(sheet) / (float)Math.abs(group.getY2() - group.getY1());
    g = new EscherGraphics( group, wb, Color.black, verticalPointsPerPixel );
    g2d = new EscherGraphics2d( g );
    drawChemicalStructure( g2d );

The first thing we do is create the group and set it's coordinates to match what we plan to draw. Next we calculate a reasonable fontSizeMultipler then create the EscherGraphics object. Since what we really want is a Graphics2d object we create an EscherGraphics2d object and pass in the graphics object we created. Finally we call a routine that draws into the EscherGraphics2d object.

The vertical points per pixel deserves some more explanation. One of the difficulties in converting Graphics calls into escher drawing calls is that Excel does not have the concept of absolute pixel positions. It measures it's cell widths in 'characters' and the cell heights in points. Unfortunately it's not defined exactly what type of character it's measuring. Presumably this is due to the fact that the Excel will be using different fonts on different platforms or even within the same platform.

Because of this constraint we've had to implement the concept of a verticalPointsPerPixel. This the amount the font should be scaled by when you issue commands such as drawString(). To calculate this value use the follow formula:

    multipler = groupHeightInPoints / heightOfGroup

The height of the group is calculated fairly simply by calculating the difference between the y coordinates of the bounding box of the shape. The height of the group can be calculated by using a convenience called HSSFClientAnchor.getAnchorHeightInPoints().

Many of the functions supported by the graphics classes are not complete. Here's some of the functions that are known to work.

fillRect()
fillOval()
drawString()
drawOval()
drawLine()
clearRect()

Functions that are not supported will return and log a message using the POI logging infrastructure (disabled by default).

Outlining

Outlines are great for grouping sections of information together and can be added easily to columns and rows using the POI API. Here's how:

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet1 = wb.createSheet("new sheet");

    sheet1.groupRow( 5, 14 );
    sheet1.groupRow( 7, 14 );
    sheet1.groupRow( 16, 19 );

    sheet1.groupColumn( (short)4, (short)7 );
    sheet1.groupColumn( (short)9, (short)12 );
    sheet1.groupColumn( (short)10, (short)11 );

    FileOutputStream fileOut = new FileOutputStream(filename);
    wb.write(fileOut);
    fileOut.close();

To collapse (or expand) an outline use the following calls:

    sheet1.setRowGroupCollapsed( 7, true );
    sheet1.setColumnGroupCollapsed( (short)4, true );

The row/column you choose should contain an already created group. It can be anywhere within the group.

Images

Images are part of the drawing support. To add an image just call createPicture() on the drawing patriarch. At the time of writing the following types are supported:

It is not currently possible to read existing images and it should be noted that any existing drawings may be erased once you add a image to a sheet.

    // Create the drawing patriarch.  This is the top level container for
    // all shapes. This will clear out any existing shapes for that sheet.
    HSSFPatriarch patriarch = sheet5.createDrawingPatriarch();

    HSSFClientAnchor anchor;
    anchor = new HSSFClientAnchor(0,0,0,255,(short)2,2,(short)4,7);
    anchor.setAnchorType( 2 );
    patriarch.createPicture(anchor, loadPicture( "src/resources/logos/logoKarmokar4.png", wb ));

Named Ranges and Named Cells

Named Range is a way to refer to a group of cells by a name. Named Cell is a degenerate case of Named Range in that the 'group of cells' contains exactly one cell. You can create as well as refer to cells in a workbook by their named range. When working with Named Ranges, the classes: org.apache.poi.hssf.util.CellReference and & org.apache.poi.hssf.util.AreaReference are used.

Creating Named Range / Named Cell

    // setup code
    String sname = "TestSheet", cname = "TestName", cvalue = "TestVal";
    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet(sname);
    sheet.createRow(0).createCell((short) 0).setCellValue(cvalue);
     
    // 1. create named range for a single cell using areareference
    HSSFName namedCell = wb.createName();
    namedCell.setNameName(cname);
    String reference = sname+"!A1:A1"; // area reference
    namedCell.setReference(reference);
    
    // 2. create named range for a single cell using cellreference
    HSSFName namedCell = wb.createName();
    namedCell.setNameName(cname);
    String reference = sname+"!A1"; // cell reference
    namedCell.setReference(reference);
    
    // 3. create named range for an area using AreaReference
    HSSFName namedCell = wb.createName();
    namedCell.setNameName(cname);
    String reference = sname+"!A1:C5"; // area reference
    namedCell.setReference(reference);

Reading from Named Range / Named Cell

    // setup code
    String cname = "TestName";
    HSSFWorkbook wb = getMyWorkbook(); // retrieve workbook

    // retrieve the named range
    int namedCellIdx = wb.getNameIndex(cellName);
    HSSFName aNamedCell = wb.getNameAt(namedCellIdx);
    
    // retrieve the cell at the named range and test its contents
    AreaReference aref = new AreaReference(aNamedCell.getReference());
    CellReference[] crefs = aref.getCells();
    for (int i=0; i


brock 2006-09-14 16:47 发表评论

excel 处理 Poi

brock — Thu, 14 Sep 2006 08:24:00 GMT

excel 样式

// create a cell object 创徏一个元�?行的�?对象
HSSFCell cell = row.createCell(column);
// create a cell style object 创徏一个元素的样式对象
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setAlignment(align);
cellStyle.setVerticalAlignment(valign);
// set cell border 讄��元素的边�?/span>
cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
// set foreground color 讄��元素的前景色
cellStyle.setFillForegroundColor(bgColor);
cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
// set font 讄��字体
cellStyle.setFont(font);
// set size
// set the style of this cell 把样式加到元素中
cell.setCellStyle(cellStyle);
// set cell's charset 讄��字符 (中文问题)
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
// set cell value 改元素赋�?/span>
cell.setCellValue(value);

从data 中得到数�?

ArrayList datacell_list = DBToExcel.getSheetDataCol(tableid,k_row,new DBAgent());
for(int k_col=0;k_col<datacell_list.size();k_col++){
　　HSSFCell cell = row.createCell((short)k_col);
　　cell.setEncoding(HSSFCell.ENCODING_UTF_16);

　　SheetDataBean sdb =(SheetDataBean)datacell_list.get(k_col);
colnum = sdb.getColnum();

String data = DBToExcel.getSheetCellValue(tableid,k_row,colnum,new DBAgent());
//cell.setCellValue(data);　

打印

1.
HSSFCell c;
..
c.setEncoding(HSSFCell.ENCODING_UTF_16);
c.setCellValue("��试��试��试��试��试��试��试��试");

2.
打印讄��
import org.apache.poi.hssf.usermodel.HSSFPrintSetup;
创徏打印讄��对象
HSSFPrintSetup hps = hs.getPrintSetup();
讄��A4�U?br />hps.setPaperSize((short)9);
��页面设�|��ؓ横向打印模式
hps.setLandscape(true);
讄��打印��面为水�q�_��?br />sheet.setHorizontallyCenter(true);
讄��打印��面为垂直居�?br />sheet.setVerticallyCenter(true);

brock 2006-09-14 16:24 发表评论

利用POI��数据表导入Excel

brock — Wed, 26 Jul 2006 07:30:00 GMT

/*
* QuickExcel.java
* 作者：杨庆�?/font>

* Created on 2004�q?1�?2�? 下午4:05

* 在实际应用中�l�常要将数据库中的表导入Excel

* 本�h在Apache的POI基础上写了一个简单的�c?/font>

* 有不当指��指正�Q�谢谢！

package yqc.poi;

import java.sql.*;

import java.util.*;

import java.io.*;

import java.io.ByteArrayInputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import org.apache.poi.hssf.usermodel.*;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import org.apache.poi.hssf.record.*;

import org.apache.poi.hssf.model.*;

import org.apache.poi.hssf.usermodel.*;

import org.apache.poi.hssf.util.*;import yqc.sql.*;

/**

* @author Administrator

public class QuickExcel {

/** Creates a new instance of QuickExcel */

private QuickExcel(String file){

_file=file;

}

private void open()throws IOException{

InputStream stream = null;

Record[] records = null;

POIFSFileSystem fs =

new POIFSFileSystem(new FileInputStream(_file));

_wb = new HSSFWorkbook(fs);

}

private void create(){

_wb=new HSSFWorkbook();

}

public static QuickExcel newInstance (String file){

QuickExcel qe=new QuickExcel(file);

qe.create();

return qe;

}

public static QuickExcel openInstance(String file) throws IOException {

QuickExcel qe=new QuickExcel(file);

qe.open();

return qe;

}

public void close(){

try{

FileOutputStream fileOut = new FileOutputStream(_file);

_wb.write(fileOut);//把Workbook对象输出到文件workbook.xls�?/font>

fileOut.close();

}

catch (Exception ex){

System.out.println(ex.getMessage());

}

private void removeSheet(String sheetName){

int i=_wb.getSheetIndex("sheetName");

if (i>=0) _wb.removeSheetAt(i);

}

public int fillSheet (ResultSet rs,String sheetName)throws SQLException {

HSSFSheet st= _wb.createSheet(sheetName);

ResultSetMetaData rsmd= rs.getMetaData();

int index=0;

int result=0;

HSSFRow row=st.createRow(index++);

for(int i=1;i<=rsmd.getColumnCount();++i){

HSSFCell cell=row.createCell((short)(i-1));

cell.setCellValue(rsmd.getColumnName(i));

}

while(rs.next()) {

result++;

row=st.createRow(index++);

for(int i=1;i<=rsmd.getColumnCount();++i){

HSSFCell cell=row.createCell((short)(i-1));

cell.setEncoding(cell.ENCODING_UTF_16);

cell.setCellValue(rs.getString(i));

}

return result;

}

public static void main(String[] args){

try{

QuickConnection qc=new MssqlConnection("jdbc:microsoft:sqlserver://192.168.0.100:1433;DatabaseName=ls");

QuickExcel qe=QuickExcel.newInstance("a.xls");

qc.connect();

String sql="select * from ls.dbo.radio1_emcee";

ResultSet rs=qc.getStatement().executeQuery(sql);

qe.fillSheet(rs,"MT");

qe.close();

qe=QuickExcel.openInstance("a.xls");

qe.fillSheet(rs,"MO");

qe.close();

qc.close();

}

catch (SQLException ex){

System.out.println(ex.getMessage());

}

catch (IOException ex){

System.out.println(ex.getMessage());

}

HSSFWorkbook _wb;

String _file="new.xls";

}

brock 2006-07-26 15:30 发表评论

�U�java的Excel解决�Ҏ(gu��)��

brock — Wed, 26 Jul 2006 07:29:00 GMT

摘要:

Apache的Jakata��目的POI子项目，目标是处理ole2对象。目前比较成熟的是HSSF接口�Q�处理MS Excel�Q?7-2002�Q�对�?

工具��?/h4> 本站收藏
复制链接

微��Y在桌面系�l�上的成功，令我们不得不大量使用它的办公产品�Q�如�Q�Word�Q�Excel。时至今日，它的源代码仍然不公开已封锁了我们的进一步应用和开发。然而在要求更高的服务器领域�Q�微软本�w�的产品�U�L��性不好，
性能不佳。在我们实际的开发中�Q�表现层的解��x��案虽然有多样�Q�但是Ie��览器已成�ؓ最多�h使用的浏览器�Q�因为大安��用Windows。在企业办公�pȝ��中，常常有客戯��样子要求�Q�你要把我们的报表直接用Excel打开。或者是�Q�我们已�l�习(f��n)惯用Excel打印。这样子如果�?net开发是没有问题的，但是有j2ee�q�个�?net更有前途的开攑ּ�的开发环境，��N��我�ؓ了解��x��印的要求��d��写客��L(f��ng)��的控�Ӟ��或者在服务器端使用本地代码�Q�第一�U�方案的问题是关键数据的处理有时候不能在客户端做�Q�第2�U�方案的问题是牺牲了代码的可�U�L��性和�E�_��性。如果让客户端只负责处理生成好的报表�Q�那��是一�U�诱人的选择�?br />
Apache的Jakata��目的POI子项目，目标是处理ole2对象。目前比较成熟的是HSSF接口�Q�处理MS Excel�Q?7-2002�Q�对象。它不象我们仅仅是用csv生成的没有格式的可以由Excel转换的东西，而是真正的Excel对象�Q�你可以控制一些属性如sheet,cell�{�等。这是一个年�ȝ��目�Q�所以象HDF�q�样直接支持Word对象的好东西仍然在设计中。其它支持word格式的纯java�Ҏ(gu��)��q�有itext�Q�不�q�也是仍在奋斗中。但是HSSF已经成熟到能够和��_��我们使用了。另外，无锡�怸�Office的实现方案也是纯java的解��x��案，不过那也是完全商业的产品�Q��ƈ不是公开代码��目。其实，从开发历史的角度�Ԍ��?0�q�代中期starOffice的原作者在德国成立了StarOffice suite公司�Q�然后到1999�q�夏天starOffice被sun收购�Q�再�?000�q?月starOffice5.2的发布；�q�且从starOffice6.0开始，starOffice建立在OpenOffice的api的基��上，�q�个公开代码的office��目已经�q�行了很长的旉��。虽焉��是由C++写的�Q�但是POI的代码部分也是由openOffice改过来的。所以，应该对POI充满��_��的信心。国内已�l�有部分公司在他们的办公自动化等Web��目中��用poi了，如日恒的ioffice�Q��v泰的HTOffice�{��?br />
java当初把核心处理设成Unicode�Q�带来的好处是另代码适应了多语言环境。然而由于老外的英语只�?6个字母，有些情况下，一些程序员�?位的byte处理�Q�一不小心就��L��了CJK的高位。或者是�׃��?f��n)惯在程序中采用��编码，�q�有多种原因�Q��得许多java应用在CJK的处理上很烦恹{��还好在POI HSSF中考虑到这个问题，可以讄��encoding为双字节�?br />
POI可以到www.apache.org下蝲到。编译好的jar主要有这�?个：poi�?poi Browser�?poi hdf�?poi hssf例程包。实际运行时�Q�需要有poi包就可以了。如果用Jakarta ant�~�译和运行，下蝲apache Jakarta POI的release中的src包，它里面已�l��ؓ你生成好了build文�g了。只要运行ant��可以了(ant 的安装和使用在此不说�?。如果是用Jbuilder �q�行�Q�请在新建的��目中加入poi包。以Jbuilder6��Z��Q�选择Tools菜单��的config libraries...选项�Q�新��Z��个lib。在弹出的菜单中选择poi包，如这个jakarta-poi-1.5.1-final-20020820.jar�Q�把poi��d��到jbuilder中。然后，右键点击你的��目�Q�在project的properties菜单中path的required Libraries中，点add�Q�添加刚才加入到jbuilder中的poi��C��现在的项目中。如果你仅仅是�ؓ了熟�(zh��n)�POI hssf的��用，可以直接看POI的samples包中的源代码�Q��ƈ且运行它。hssf的各�U�对象都有例�E�的介绍。hssf提供的例�E�在org.apache.poi.hssf.usermodel.examples包中�Q�共�?4个，生成的目标xls都是workbook.xls。如果你想看更多的例�E�，可以参考hssf的Junit test cases�Q�在poi的包的源代码中有。hssf都有��试代码�?br />
�q�里只对部分例程的实现做介绍�?br />
HSSF提供�l�用户��用的对象在org.apache.poi.hssf.usermodel包中,主要部分包括Excell对象�Q�样式和格式�Q�还有辅助操作。有以下几种对象�Q?br />
HSSFWorkbook excell的文档对�?br />
HSSFSheet excell的表�?br />
HSSFRow excell的行

HSSFCell excell的格子单�?br />
HSSFFont excell字体

HSSFName 名称

HSSFDataFormat 日期格式

在poi1.7中才有以�?��：

HSSFHeader sheet�?br />
HSSFFooter sheet��?br />
和这个样�?br />
HSSFCellStyle cell样式

辅助操作包括

HSSFDateUtil 日期

HSSFPrintSetup 打印

HSSFErrorConstants 错误信息�?br />
仔细看org.apache.poi.hssf包的�l�构�Q�不隑֏�现HSSF的内部实现遵循的是MVC模型�?br />
�q�里我用Rose把org.apache.poi.hssf.usermodel包中的对象反向导入�ƈ�Ҏ(gu��)��怺�关系作了整理�Q�详见下面两图：

  IMG ../upload/article/a2005512101549.jpg[/IMG]

�? 基本对象

从中不难可以发现每一个基本对象都兌��了一个Record对象。Record对象是一个参考Office格式的相兌��录�?br />
   IMG ../upload/article/2005512101631.jpg[/IMG]

�? HSSFWorkbook

HSSFWorkbook��x��一个Excell对象。这�q�类图体现的是HSSFWorkbook和基本对象的�怺�关系。可见，许多对象中也建立了Workbook的引用。还需要注意的是在HSSFWorkbook和HSSFSheet中徏立了log机制POILogger�Q�而且POILogger也是使用apache Log4J实现的�?br />
先看poi的examples包中提供的最��单的例子�Q�徏立一个空xls文�g�?br />
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import java.io.FileOutputStream;

import java.io.IOException;

public class NewWorkbook

{

public static void main(String[] args)

throws IOException

{

HSSFWorkbook wb = new HSSFWorkbook();//建立新HSSFWorkbook对象

FileOutputStream fileOut = new FileOutputStream("workbook.xls");

wb.write(fileOut);//把Workbook对象输出到文件workbook.xls�?br />
fileOut.close();

}

}

通过�q�个例子�Q�我们徏立的是一个空白的xls文�g�Q�不是空文�g�Q�。在此基��上，我们可以�q�一步看其它的例子�?br />

import org.apache.poi.hssf.usermodel.*;

import java.io.FileOutputStream;

import java.io.IOException;

public class CreateCells

{

public static void main(String[] args)

throws IOException

{

HSSFWorkbook wb = new HSSFWorkbook();//建立新HSSFWorkbook对象

HSSFSheet sheet = wb.createSheet("new sheet");//建立新的sheet对象

// Create a row and put some cells in it. Rows are 0 based.

HSSFRow row = sheet.createRow((short)0);//建立新行

// Create a cell and put a value in it.

HSSFCell cell = row.createCell((short)0);//建立新cell

cell.setCellValue(1);//讄��cell的整数类型的�?br />

// Or do it on one line.

row.createCell((short)1).setCellValue(1.2);//讄��cell��点�c�d��的�?br />
row.createCell((short)2).setCellValue("test");//讄��cell字符�c�d��的�?br />
row.createCell((short)3).setCellValue(true);//讄��cell布尔�c�d��的�?

HSSFCellStyle cellStyle = wb.createCellStyle();//建立新的cell样式

cellStyle.setDataFormat(HSSFDataFormat.getFormat("m/d/yy h:mm"));//讄��cell样式为定制的日期格式

HSSFCell dCell =row.createCell((short)4);

dCell.setCellValue(new Date());//讄��cell为日期类型的�?br />
dCell.setCellStyle(cellStyle); //讄��该cell日期的显�C�格�?br />
HSSFCell csCell =row.createCell((short)5);

csCell.setEncoding(HSSFCell.ENCODING_UTF_16);//讄��cell�~�码解决中文高位字节截断

csCell.setCellValue("中文��试_Chinese Words Test");//讄��中西文结合字�W�串

row.createCell((short)6).setCellType(HSSFCell.CELL_TYPE_ERROR);//建立错误cell

// Write the output to a file

FileOutputStream fileOut = new FileOutputStream("workbook.xls");

wb.write(fileOut);

fileOut.close();

}

}

我稍微修改了原来的examples包中的CreateCells�c�d��了上面的功能��试�c�R��通过�q�个例子�Q�我们可以清楚的看到xls文�g从大到小包括了HSSFWorkbook HSSFSheet HSSFRow HSSFCell�q�样几个对象。我们可以在cell中设�|�各�U�类型的倹{��尤其要注意的是如果你想正确的显�C�非�Ƨ美的字�W�时�Q�尤其象中日韩这��L(f��ng)��语言�Q�必��设�|�编码�ؓ16位的��x��HSSFCell.ENCODING_UTF_16�Q�才能保证字�W�的�?位不被截断而引��L(f��ng)��码失真�Ş成�ؕ码�?br />
其他��试可以通过参考examples包中的测试例子掌握poi的详�l�用法，包括字体的设�|�，cell大小和低�U�的讄��{�。需要注意的是POI是一个仍然在完善中的公开代码的项目，所以有些功能正在不断的扩充。如HSSFSheet的getFooter() getHeader()和setFooter(HSSFFooter hsf) setHeader(HSSFHeader hsh)是在POI1.7中才有的�Q�而POI1.5中就没有。运行测试熟�(zh��n)�代码或者��用它做项目时��h��意POI的版本�?br />
另外需要注意的是HSSF也有它的对xls��Z��事�g的解析。可以参考例�E�中的EventExample.java。它通过实现HSSFListener完成从普通流认知Xls中包含的内容�Q�在apache Cocoon中的org.apache.cocoon.serialization.HSSFSerializer中用��C��q�个解析。因为Cocoon2是基于事件的�Q�所以POI��Z��提供快速的解析也提供了相应的事件。当然我们自�׃��可以实现�q�个事�g接口�?br />
因�ؓPOI�q�不是一个��够成熟的��目�Q�所以有必要做进一步的开发和��试。但是它已经为我们用�U�java操作ole2对象提供了可能，而且克服了ole对象调用的缺��P��提供了服务器端的Excel解决�Ҏ(gu��)��?br />

brock 2006-07-26 15:29 发表评论

Excel的java处理方式

brock — Thu, 13 Jul 2006 05:48:00 GMT

Poi即poor object interface之意�Q�是poi��目�l�对微��Y��闭的office文�g格式�Q�接口）的称谓！
其中提供了对word和excel的java接口�Q�用法非常简单，�q�且是完全免费的�Q�对中文的支持也相当不错�Q�下面是处理excel一个简单的实例�Q?

package test;

import java.io.*;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class Test {
public static void main(String[] args) {
try {
/**************创徏一个xls文档*************/
HSSFWorkbook wb = new HSSFWorkbook();
FileOutputStream fileOut = new FileOutputStream("workbook.xls");
HSSFSheet sheet = wb.createSheet("new sheet");
HSSFRow row = sheet.createRow((short)0);
HSSFCell cell = row.createCell((short)0);
row.createCell((short)1);
row.createCell((short)2);
row.createCell((short)3);
row.createCell((short)4);
row.createCell((short)5);
cell.setCellValue("test_write!");
wb.write(fileOut);
fileOut.close();
/*************��d��q�修改xls文档***************/
POIFSFileSystem pfs=new POIFSFileSystem(new FileInputStream("workbook.xls"));
HSSFWorkbook hwb=new HSSFWorkbook(pfs);
HSSFSheet hs=hwb.getSheetAt(0);
HSSFRow hr=hs.getRow(0);
HSSFCellStyle style=hwb.createCellStyle();
style.setAlignment(style.ALIGN_CENTER);
HSSFFont hf=hwb.createFont();
hf.setFontName("楷体_GB2312");
style.setFont(hf);
HSSFCell cl=hr.getCell((short)2);
cl.setEncoding(cl.ENCODING_UTF_16);
cl.setCellStyle(style);
cl.setCellValue("test_modify! ��试\u2014\u2014�~�辑�Q?);
FileOutputStream fos=new FileOutputStream("workbook.xls");
hwb.write(fos);
fos.flush();
fos.close();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}

brock 2006-07-13 13:48 发表评论

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excel poi 处理2

Busy Developers' Guide to HSSF Features (说明�?

Features

New Workbook

New Sheet

Creating Cells

Creating Date Cells

Working with different types of cells不同�c�d��的单元格一起工�?/h2>

Demonstrates various alignment options�C����不同的对齐选项

Working with borders讄����Ҏ(gu��)��

Fills and colors填充 �?颜色

Merging cells 合�ƈ单元�?/h2>

Working with fonts 字体

Custom colors 自定义颜�?/h2>

Reading and Rewriting Workbooks ��d�� 重写工作��?/h2>

Using newlines in cells 换行

Data Formats 数据格式

Fit Sheet to One Page 一��中显视合适的工作�?/h2>

Set Print Area 讄���打印�?/h2>

Set Page Numbers on Footer 讄�����|�� 在页用中

Using the Convenience Functions 行用方便的方�?/h2>

Shift rows up or down on a sheet

Set a sheet as selected 讄�����Z���?/h2>

Set the zoom magnification讄���攑֤��?/h2>

Splits and freeze panes

Repeating rows and columns

Headers and Footers ��头 �?��脚

Drawing Shapes

Styling Shapes

Shapes and Graphics2d

Outlining

Images

Named Ranges and Named Cells

excel 处理 Poi

利用POI���数据表导入Excel

�U�java的Excel解决�Ҏ(gu��)��

摘要:

工具��?/h4> 本站收藏 复制链接

Excel的java处理方式

Demonstrates various alignment options�C��不同的对齐选项

Working with borders讄��Ҏ(gu��)��

Set Print Area 讄��打印�?/h2>

Set Page Numbers on Footer 讄��|�� 在页用中

Set a sheet as selected 讄��Z��?/h2>

Set the zoom magnification讄��攑֤��?/h2>

利用POI��数据表导入Excel

工具��?/h4> 本站收藏
复制链接