nes pareto it is taf nump event apply 區域 excel導入導出

轉自http://aman.cao.blog.163.com/blog/static/32951336201010823557408/

POI3的資料整理
一．POI簡介

Jakarta POI 是apache的子項目，目標是處理ole2對象。它提供了一組操縱Windows文檔的Java API

目前比較成熟的是HSSF接口，處理MS Excel（97-2002）對象。它不象我們僅僅是用csv生成的沒有格式的可以由Excel轉換的東西，而是真正的Excel對象，你可以控制一些屬性如sheet,cell等等。

二．HSSF概況

HSSF 是Horrible SpreadSheet Format的縮寫，也即“討厭的電子表格格式”。 也許HSSF的名字有點滑稽，就本質而言它是一個非常嚴肅、正規的API。通過HSSF，你可以用純Java代碼來讀取、寫入、修改Excel文件。

HSSF 為讀取操作提供了兩類API：usermodel和eventusermodel，即“用戶模型”和“事件-用戶模型”。前者很好理解，後者比較抽象，但操作效率要高得多。

三．開始編碼

1 ． 準備工作

要求:JDK 1.4+POI開發包

可以到 http://www.apache.org/dyn/closer.cgi/jakarta/poi/ 最新的POI工具包

2 ． EXCEL 結構

HSSFWorkbook excell 文檔對象介紹
HSSFSheet excell的表單
HSSFRow excell的行
HSSFCell excell的格子單元
HSSFFont excell字體
HSSFName 名稱
HSSFDataFormat 日期格式
HSSFHeader sheet頭
HSSFFooter sheet尾
和這個樣式
HSSFCellStyle cell樣式
輔助操作包括
HSSFDateUtil 日期
HSSFPrintSetup 打印
HSSFErrorConstants 錯誤信息表

4 ． 可參考文檔

POI 主頁：http://jakarta.apache.org/poi/，

初學者如何快速上手使用POI HSSF

http://jakarta.apache.org/poi/hssf/quick-guide.html 。

代碼例子 http://blog.java-cn.com/user1/6749/archives/2005/18347.html


裏面有很多例子代碼，可以很方便上手。

四．使用心得

POI HSSF 的usermodel包把Excel文件映射成我們熟悉的結構，諸如Workbook、Sheet、Row、Cell等，它把整個結構以一組對象的形式保存在內存之中，便於理解，操作方便，基本上能夠滿足我們的要求，所以說這個一個不錯的選擇。

1.創建工作簿 (WORKBOOK)
Java代碼
HSSFWorkbook wb = new HSSFWorkbook();
FileOutputStream fileOut = new FileOutputStream("workbook.xls");
wb.write(fileOut);
fileOut.close();

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

2.創建工作表（SHEET）
Java代碼
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet1 = wb.createSheet("new sheet");
HSSFSheet sheet2 = wb.createSheet("second sheet");
FileOutputStream fileOut = new FileOutputStream("workbook.xls");
wb.write(fileOut);
fileOut.close();

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

3.創建單元格(CELL)
Java代碼
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 value in it.
HSSFCell cell = row.createCell((short)0);
cell.setCellValue(1);
// Or do it on one line.
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();

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 value in it.
HSSFCell cell = row.createCell((short)0);
cell.setCellValue(1);
// Or do it on one line.
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(); 4

4.創建指定單元格式的單元格
Java代碼
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();

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();

5. 單元格的不同格式
Java代碼
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();

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();

6.單元格的不通對齊方式
Java代碼
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);
}

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);
}

7.單元格的邊框設置
Java代碼
//Working with borders
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();

//Working with borders
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();

8.填充和顏色設置
Java代碼
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();

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();

9.合並單元格操作
Java代碼
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();

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();
9.1合並單元格邊框的解決辦法
Java代碼
private void setRegionStyle(HSSFSheet sheet, Region region , HSSFCellStyle cs) {
int toprowNum = region.getRowFrom();
for (int i = region.getRowFrom(); i <= region.getRowTo(); i ++) {
HSSFRow row = HSSFCellUtil.getRow(i, sheet);
for (int j = region.getColumnFrom(); j <= region.getColumnTo(); j++) {
HSSFCell cell = HSSFCellUtil.getCell(row, (short)j);
cell.setCellStyle(cs);
}
}
}

private void setRegionStyle(HSSFSheet sheet, Region region , HSSFCellStyle cs) {
int toprowNum = region.getRowFrom();
for (int i = region.getRowFrom(); i <= region.getRowTo(); i ++) {
HSSFRow row = HSSFCellUtil.getRow(i, sheet);
for (int j = region.getColumnFrom(); j <= region.getColumnTo(); j++) {
HSSFCell cell = HSSFCellUtil.getCell(row, (short)j);
cell.setCellStyle(cs);
}
}
}

10.字體設置
Java代碼
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();

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();

11.自定義顏色
Java代碼
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();

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();


12.讀和重寫EXCEL文件
Java代碼
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();

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();

13.在EXCEL單元格中使用自動換行
Java代碼
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();

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();

14.數字格式自定義
Java代碼
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();

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();

15.調整工作單位置
Java代碼
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();

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();


16.設置打印區域
Java代碼
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();

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();

17.標註腳註
Java代碼
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();

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();

18.使用方便的內部提供的函數
Java代碼
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();

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();


19.在工作單中移動行，調整行的上下位置
Java代碼
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();

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();

20.選種指定的工作單
Java代碼
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();

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();

21.工作單的放大縮小
Java代碼
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();

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();

22.頭註和腳註
Java代碼
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();

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();


23.圖片的使用
Java代碼
//先把讀進來的圖片放到一個ByteArrayOutputStream中，以便產生ByteArray
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
BufferedImage bufferImg = ImageIO.read(new File("ok.jpg"));
ImageIO.write(bufferImg,"jpg",byteArrayOut);

//讀進一個excel模版
FileInputStream fos = new FileInputStream(filePathName+"/stencil.xlt");
fs = new POIFSFileSystem(fos);
//創建一個工作薄
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFSheet sheet = wb.getSheetAt(0);
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
HSSFClientAnchor anchor = new HSSFClientAnchor(0,0,1023,255,(short) 0,0,(short)10,10);
patriarch.createPicture(anchor , wb.addPicture(byteArrayOut.toByteArray(),HSSFWorkbook.PICTURE_TYPE_JPEG));

//先把讀進來的圖片放到一個ByteArrayOutputStream中，以便產生ByteArray
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
BufferedImage bufferImg = ImageIO.read(new File("ok.jpg"));
ImageIO.write(bufferImg,"jpg",byteArrayOut);

//讀進一個excel模版
FileInputStream fos = new FileInputStream(filePathName+"/stencil.xlt");
fs = new POIFSFileSystem(fos);
//創建一個工作薄
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFSheet sheet = wb.getSheetAt(0);
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
HSSFClientAnchor anchor = new HSSFClientAnchor(0,0,1023,255,(short) 0,0,(short)10,10);
patriarch.createPicture(anchor , wb.addPicture(byteArrayOut.toByteArray(),HSSFWorkbook.PICTURE_TYPE_JPEG));

//-------------------------------以上實例代碼均來自官方網站
//-------------------------------POI中使用的顏色是用顏色索引來實現，如下：
/*
* 顏色對照表 數字代表顏色索引
8： BLACK
60： BROWN
59： OLIVE_GREEN
58： DARK_GREEN
56： DARK_TEAL
18： DARK_BLUE
32： DARK_BLUE
62： INDIGO
63： GREY_80_PERCENT
53： ORANGE
19： DARK_YELLOW
17： GREEN
21： TEAL
38： TEAL
12： BLUE
39： BLUE
54： BLUE_GREY
23： GREY_50_PERCENT
10： RED
52： LIGHT_ORANGE
50： LIME
57： SEA_GREEN
49： AQUA
48： LIGHT_BLUE
20： VIOLET
36： VIOLET
55： GREY_40_PERCENT
14： PINK
33： PINK
51： GOLD
13： YELLOW
34： YELLOW
11： BRIGHT_GREEN
35： BRIGHT_GREEN
15： TURQUOISE
35： TURQUOISE
16： DARK_RED
37： DARK_RED
40： SKY_BLUE
61： PLUM
25： PLUM
22： GREY_25_PERCENT
45： ROSE
43： LIGHT_YELLOW
42： LIGHT_GREEN
41： LIGHT_TURQUOISE
27：LIGHT_TURQUOISE
44： PALE_BLUE
46： LAVENDER
9： WHITE
24： CORNFLOWER_BLUE
26： LEMON_CHIFFON
25： MAROON
28： ORCHID
29： CORAL
30： ROYAL_BLUE
31： LIGHT_CORNFLOWER_BLUE
*/
//----------------------------------------------------你可以按上面的方法來自定義顏色
/*
* 自定義顏色，去掉註釋，貼加，其他則查看顏色對照表
HSSFPalette palette = this.getCustomPalette();
palette.setColorAtIndex(idx,
i, //RGB red (0-255)
j, //RGB green
k //RGB blue
);
*/
//-------------------------------------------------




五、應用實例：

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="java.lang.*,computer.*"%>
<html>
<head>
<title>計算機設備管理</title>
<%
GetData gd=new GetData();
%>
</head>
<form name="form1" action="SaveData.jsp">
<table border="0" cellspacing="1" cellpadding="2" width="97%" align="center" bgcolor="#F6F6F6">
<tr><td colspan="5"><div align="center"><img src="http://aman.cao.blog.163.com/blog/images/text01.jpg" align="center"></div></td></tr>
<tr><td colspan="5">
<hr>
</td></tr>
<tr>
<td width="15%"><div align="right">設備編號</div></td>
</tr>
<tr>
<td colspan="5"><div align="center">
<input name="btnDo" type="submit" value="數據提交">&nbsp;&nbsp;&nbsp;&nbsp;
<input name="btnReset" type="reset" value="重新輸入">&nbsp;&nbsp;&nbsp;&nbsp;
<input name="btnOutToExcel" type="button" value="導出到Excel" onClick="clickForOutToExcel();">
</div></td></tr>
<tr><td colspan="5">
<hr>
</td></tr>
</table>
<input name="Page_Mark" type="hidden" value="Maintain">
</form>
<form name="form2" action="JSPExcel.jsp">
<input name="GetOrPut" type="hidden" value="">
</form>
<script language=javascript>
function clickForOutToExcel()
{
document.form2.GetOrPut.value="PutMaintain";
alert("維修設備清單成功導出為EXCEL文件！\r\r請查看C盤根目錄下的：維修清單.xls");
document.form2.submit();
}
</script>
</html>

六、處理有EXCEL導入導出要求的JSP文件（JSPExcel.jsp）

<%@ page contentType="text/html;charset=gbk"%>
<%@ page import="java.lang.*,computer.*"%>

<html>
<head>
</head>
<body>
<%
String gp=request.getParameter("GetOrPut");
String gf=Pool.toChinese(request.getParameter("GFF"));
GetOrWriteExcel gwe=new GetOrWriteExcel();
if (gp.compareTo("Put")==0) {
try{
gwe.AllEquipToExcel();
%>
<jsp:forward page="Equip.jsp">
<jsp:param name="" value=""/>
</jsp:forward>
<%

}catch(Exception ep){
System.out.println(ep);
}
}
else if (gp.compareTo("Get")==0) {
try{
gwe.GetEquipFromExcel(gf);
%>
<jsp:forward page="Equip.jsp">
<jsp:param name="" value=""/>
</jsp:forward>
<%

}catch(Exception ep){
System.out.println(ep);
}
}
else if (gp.compareTo("PutDis")==0) {
try{
gwe.DisToExcel();
%>
<jsp:forward page="Distribute.jsp">
<jsp:param name="" value=""/>
</jsp:forward>
<%

}catch(Exception ep){
System.out.println(ep);
}
}
else if (gp.compareTo("PutMaintain")==0) {
try{
gwe.MaintainToExcel();
%>
<jsp:forward page="Maintain.jsp">
<jsp:param name="" value=""/>
</jsp:forward>
<%

}catch(Exception ep){
System.out.println(ep);
}
}
else if (gp.compareTo("PutTrash")==0) {
try{
gwe.TrashToExcel();
%>
<jsp:forward page="Trash.jsp">
<jsp:param name="" value=""/>
</jsp:forward>
<%

}catch(Exception ep){
System.out.println(ep);
}
}
else {
System.out.println("GETORPUT的值是空的！");
}
%>

</body>
</html>


七、Javabean中專門處理EXCEL的導入導出的類：GetOrWriteExcel.java

package computer;

import java.io.*;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class GetOrWriteExcel {
Pool pl;
Connection cn;

public GetOrWriteExcel(){
try{
pl=new Pool();
//在辦公室通過WEB操作數據庫
cn=pl.getConnection();
//在辦公室用Test測試數據庫操作
//cn=pl.getConnectForTest();
//在家測試數據庫
//cn=pl.getConnectAtHome();

if (cn==null){
System.out.println("數據庫連接為空");
}

} catch(Exception ex){
System.out.println(ex);
}
}

public void AllEquipToExcel(){

String sqlStr="select * from Equip_View";
String fname="c:\\設備清單.xls";

try {
DataToExcel(sqlStr,fname);
System.out.println("所有設備導入到Excel成功!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

/*
* 從Excel中導入設備列表，參數gf表示要導入的excel文件名
*/
public void GetEquipFromExcel(String gf)throws IOException{
try{
POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream(gf));
HSSFWorkbook wb=new HSSFWorkbook(fs);
HSSFSheet sheet=wb.getSheetAt(0);
HSSFRow row;
int count=0;
count=sheet.getPhysicalNumberOfRows();

//數據庫操作
try{
cn.setAutoCommit(false);
Statement st=cn.createStatement();
String sqlStr="";
for (int i=1;i<count;i++){
row=sheet.getRow(i);
sqlStr="INSERT INTO Equip(EquipID,Price,BuyDate,ETypeID,DealerID,CPU,HD,MEMORY,DISPLAY,MAINBOARD,EState,Other,Remark,Spec) VALUES(";
sqlStr += "‘";
sqlStr += row.getCell((short)0).toString().trim();
sqlStr += "‘,‘";
sqlStr += Float.parseFloat(row.getCell((short)1).toString());
sqlStr += "‘,‘";
sqlStr += row.getCell((short)2).toString().substring(0, 10);
sqlStr += "‘,‘";
sqlStr += row.getCell((short)3).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)4).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)5).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)6).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)7).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)8).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)9).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)10).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)11).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)12).toString().trim();
sqlStr += "‘,‘";
sqlStr += row.getCell((short)13).toString().trim();
sqlStr += "‘)";
//System.out.println(sqlStr);
st.addBatch(sqlStr);
//st.execute(sqlStr);
//System.out.println(sqlStr);
}

st.executeBatch();
cn.commit();
cn.setAutoCommit(true);
st.close();
System.out.println("從Excel中成功批量導入設備!");
}catch(Exception se){
System.out.println("向Equip表中批量存入數據時出錯，錯誤代碼：" + se);
}

}catch (FileNotFoundException e) {
e.printStackTrace();
}

}

public void DisToExcel(){
String sqlStr="select * from Distribute_View";
String fname="c:\\領用清單.xls";

try {
DataToExcel(sqlStr,fname);
System.out.println("所有領用設備導入到Excel成功!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void MaintainToExcel(){
String sqlStr="select * from EquipMaintain_View";
String fname="c:\\維修清單.xls";

try {
DataToExcel(sqlStr,fname);
System.out.println("所有維修記錄導入到Excel成功!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void TrashToExcel(){
String sqlStr="select * from Trash_View";
String fname="c:\\報廢清單.xls";

try {
DataToExcel(sqlStr,fname);
System.out.println("所有維修記錄導入到Excel成功!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/*
* 從數據庫將數據導出到EXCEL文件的通用函數，參數sqlStr是傳來的sql語句，filename是要保存的文件名與路徑
*/
public void DataToExcel(String sqlStr,String filename) throws IOException{
ResultSet rs = null;
ResultSetMetaData rsmeta=null;
Statement st = null;
try{
String[] title;

HSSFWorkbook wb=new HSSFWorkbook();
HSSFSheet sheet=wb.createSheet("數據清單");
HSSFRow row=sheet.createRow((short)0);//第一行顯示字段名稱

st=cn.createStatement();
rs = st.executeQuery(sqlStr);
rsmeta=rs.getMetaData();
int numofCols=rsmeta.getColumnCount();
title=new String[numofCols];
for (int i=0;i<numofCols;i++){
title[i]=rsmeta.getColumnName(i+1);
row.createCell((short)i).setCellValue(title[i]);
}
//以下顯示數據
int k=1;
while(rs.next()){
row=sheet.createRow((short)k);
for (int j=1;j<=numofCols;j++){
row.createCell((short)(j-1)).setCellValue(rs.getString(j));
}
k++;
}

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

} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
rs.close();
st.close();
} catch (Exception e) {
e.printStackTrace();
}
}

}
}

POI3的資料整理