Java讀寫Excel之POI超入門

時間 2019-11-15

標籤 java 讀寫 excel poi 入門欄目 Java 简体版

原文原文鏈接

Apache POI 是用Java編寫的免費開源的跨平臺的 Java API，Apache POI提供API給Java程式對Microsoft Office格式檔案讀和寫的功能。

Apache POI 是建立和維護操做各類符合Office Open XML（OOXML）標準和微軟的OLE 2複合文檔格式（OLE2）的Java API。用它可使用Java讀取和建立,修改MS Excel文件.並且,還可使用Java讀取和建立MS Word和MSPowerPoint文件。Apache POI 提供Java操做Excel解決方案（適用於Excel97-2008）。

先導入如下包，版本能夠自行選擇。
dom4j-1.7-20060614.jar

log4j-1.2.13.jar

poi-3.7-20101029.jar

poi-ooxml-3.7-20101029.jar

poi-ooxml-schemas-3.7-20101029.jar

若是處理.xlsx、docx、pptx的話能夠試試Docx4j 。
Docx4j is a Java library for creating and manipulating Microsoft Open XML (Word docx, Powerpoint pptx, and Excel xlsx) files.

HSSF －提供讀寫Microsoft Excel XLS格式檔案的功能。
XSSF －提供讀寫Microsoft Excel OOXML XLSX格式檔案的功能。
HWPF －提供讀寫Microsoft Word DOC格式檔案的功能。
HSLF －提供讀寫Microsoft PowerPoint格式檔案的功能。
HDGF －提供讀Microsoft Visio格式檔案的功能。
HPBF －提供讀Microsoft Publisher格式檔案的功能。
HSMF －提供讀Microsoft Outlook格式檔案的功能。

http://poi.apache.org/

Busy Developers' Guide to HSSF and XSSF Features

版本：poi-3.8-20120326.jar

一、生成Workbook

//生成Workbook
HSSFWorkbook wb = new HSSFWorkbook();

//添加Worksheet（不添加sheet時生成的xls文件打開時會報錯）
@SuppressWarnings("unused")
Sheet sheet1 = wb.createSheet();
@SuppressWarnings("unused")
Sheet sheet2 = wb.createSheet();
@SuppressWarnings("unused")
Sheet sheet3 = wb.createSheet("new sheet");
@SuppressWarnings("unused")
Sheet sheet4 = wb.createSheet("rensanning");

//保存爲Excel文件
FileOutputStream out = null;

try {
    out = new FileOutputStream("c:\\text.xls");
    wb.write(out);        
} catch (IOException e) {
    System.out.println(e.toString());
} finally {
    try {
        out.close();
    } catch (IOException e) {
        System.out.println(e.toString());
    }
}

二、生成Workbook OOXML形式(.xlsx) html

//生成Workbook
XSSFWorkbook wb = new XSSFWorkbook();

//......

三、打開Workbookjava

//方法一：使用WorkbookFactory
FileInputStream in = null;
Workbook wb = null;

try {
    in = new FileInputStream(TEST_WORKBOOK_NAME);
    wb = WorkbookFactory.create(in);
} catch (IOException e) {
    System.out.println(e.toString());
} catch (InvalidFormatException e) {
    System.out.println(e.toString());
} finally {
    try {
        in.close();
    } catch (IOException e) {
        System.out.println(e.toString());
    }
}

System.out.println("====================Workbook====================");
System.out.println("Number of Sheets:" + wb.getNumberOfSheets());
System.out.println("Sheet3's name:" + wb.getSheetName(3));
System.out.println();

//方法二：使用POIFSFileSystem
try {
    in = new FileInputStream(TEST_WORKBOOK_NAME);
    POIFSFileSystem fs = new POIFSFileSystem(in);
    wb = new HSSFWorkbook(fs);
} catch (IOException e) {
    System.out.println(e.toString());
} finally {
    try {
        in.close();
    } catch (IOException e) {
        System.out.println(e.toString());
    }
}

System.out.println("====================Workbook====================");
System.out.println("Number of Sheets:" + wb.getNumberOfSheets());
System.out.println("Sheet3's name:" + wb.getSheetName(3));
System.out.println();

四、打開加密的Workbook(讀加密)apache

FileInputStream input = new FileInputStream(TEST_WORKBOOK_NAME_ENCRYPTED);
BufferedInputStream binput = new BufferedInputStream(input);
POIFSFileSystem poifs = new POIFSFileSystem(binput);

Biff8EncryptionKey.setCurrentUserPassword(TEST_WORKBOOK_PASSWORD);

HSSFWorkbook wb = new HSSFWorkbook(poifs);

System.out.println("====================EncryptedWorkbook====================");
System.out.println("Number of Sheets:" + wb.getNumberOfSheets());
System.out.println("Sheet0's name:" + wb.getSheetName(0));
System.out.println();

五、追加Sheet app

Sheet sheet = wb.createSheet("append sheet");

六、複製Sheetdom

wb.cloneSheet(1);

七、修改Sheet名稱ide

wb.setSheetName(i, "SheetName new");

八、刪除Sheet 字體

wb.removeSheetAt(1);

九、設置下部Sheet名的Tab的第一個可見Tab ui

//設置下部Sheet名的Tab的第一個可見Tab（以左的Sheet看不見）
wb.setFirstVisibleTab(2);

十、調整Sheet順序加密

wb.setSheetOrder("SheetName3", 1);
wb.setSheetOrder(wb.getSheetName(4), 0);

十一、設置當前Sheet
t.setActiveSheet(); spa

//設置當前Sheet
wb.setActiveSheet(wb.getNumberOfSheets() - 1);
//（Excel的當前Sheet被設置，須要結合setSelected使用，否則下部Sheet名的Tab仍是默認爲第一個）
//（須要選擇多個Sheet的話，每一個Sheet調用setSelected(true)便可）
wb.getSheetAt(wb.getNumberOfSheets() - 1).setSelected(true);

十二、固定窗口

wb.getSheet("SheetName4").createFreezePane(2, 2);

1三、分割窗口

wb.getSheet("SheetName5").createSplitPane(2000, 2000, 0, 0, HSSFSheet.PANE_LOWER_LEFT);

1四、Sheet縮放

//setZoom(int numerator, int denominator)
//"numerator"÷"denominator"  例如： 3÷1＝3 那就是設置爲300%

//擴大(200%)
wb.getSheet("sheetname1").setZoom(2, 1);
//縮小(50%)
wb.getSheet("sheetname2").setZoom(1, 2);

1五、行列分組

wb.getSheet("sheetname3").groupColumn(4, 7);
wb.getSheet("sheetname3").groupColumn(9, 12);
wb.getSheet("sheetname3").groupColumn(10, 11);

wb.getSheet("sheetname3").groupRow(5, 14);
wb.getSheet("sheetname3").groupRow(7, 13);
wb.getSheet("sheetname3").groupRow(16, 19);

1六、關閉分組

wb.getSheet("sheetname3").setColumnGroupCollapsed(10, true);
wb.getSheet("sheetname3").setRowGroupCollapsed(7, true);

1七、插入行

Row row1 = wb.getSheet("sheetname4").createRow(1);
Cell cell1_1 = row1.createCell(1);
cell1_1.setCellValue(123);

Row row4 = wb.getSheet("sheetname4").createRow(4);
Cell cell4_3 = row4.createCell(3);
cell4_3.setCellValue("中國");

1八、刪除行

Row row = wb.getSheet("sheetname4").getRow(1);
wb.getSheet("sheetname4").removeRow(row);

1九、移動行

//******移動行只移動內容，不牽扯行的刪除和插入

//移動行（把第1行和第2行移到第5行以後）
wb.getSheet("sheetname5").shiftRows(0, 1, 5);

//移動行（把第3行和第4行往上移動1行）
wb.getSheet("sheetname5").shiftRows(2, 3, -1);

20、修改行高

//設置默認行高
wb.getSheet("sheetname6").setDefaultRowHeight((short)100);

//設置行高
wb.getSheet("sheetname6").getRow(2).setHeight((short)(100 * 20));

2一、修改列寬

//設置默認列寬
wb.getSheet("sheetname7").setDefaultColumnWidth(12);

//設置列寬
wb.getSheet("sheetname7").setColumnWidth(0, 5 * 256);

2二、不顯示網格線

//不顯示網格線
wb.getSheet("sheetname8").setDisplayGridlines(false);

2三、設置分頁

//設置第一頁：3行2列 （能夠屢次設置）
wb.getSheet("sheetname9").setRowBreak(2);
wb.getSheet("sheetname9").setColumnBreak(1);

2四、添加，刪除，合併單元格

//追加行
for (int i = 0; i < 10; i++) {
    Row row = wb.getSheet("sheetname10").createRow(i);
    for (int j = 0; j < 10; j++) {
        //添加單元格
        Cell cell = row.createCell(j);
        cell.setCellValue(i + 1);
    }
    
    //刪除單元格
    row.removeCell(row.getCell(5));
}
        
//合併單元格
//CellRangeAddress(int firstRow, int lastRow, int firstCol, int lastCol)
wb.getSheet("sheetname10").addMergedRegion(new CellRangeAddress(1, 4, 2, 3));

2五、設置Header，Footer

//Header
Header header = wb.getSheet("sheetname11").getHeader();
header.setLeft(HSSFHeader.startUnderline() +
        HSSFHeader.font("宋體", "Italic") +
        "文字文字" +
        HSSFHeader.endUnderline());
header.setCenter(HSSFHeader.fontSize((short)16) +
        HSSFHeader.startDoubleUnderline() +
        HSSFHeader.startBold() +
        "漢字漢字" +
        HSSFHeader.endBold() +
        HSSFHeader.endDoubleUnderline());
header.setRight("打印時間:" + HSSFHeader.date() +  " " + HSSFHeader.time());

//Footer
Footer footer = wb.getSheet("sheetname11").getFooter();
footer.setLeft("Copyright @ rensanning");
footer.setCenter("Page:" + HSSFFooter.page() + " / " + HSSFFooter.numPages());
footer.setRight("File:" + HSSFFooter.file());

2六、設置單元格值

//boolean
Cell cell00 = rows[0].createCell(0);
boolean val00 = true;
cell00.setCellValue(val00);

//Calendar 格式化
CellStyle styleCalendar = wb.createCellStyle();
DataFormat formatCalendar = wb.createDataFormat();
styleCalendar.setDataFormat(formatCalendar.getFormat("yyyy/mm/dd"));
Cell cell11 = rows[1].createCell(0);
Calendar val11 = Calendar.getInstance();
cell11.setCellStyle(styleCalendar);
cell11.setCellValue(val11);

//Date 格式化
CellStyle styleDate = wb.createCellStyle();
DataFormat formatDate = wb.createDataFormat();
styleDate.setDataFormat(formatDate.getFormat("yyyy/mm/dd hh:mm"));
Cell cell21 = rows[2].createCell(0);
Date val21 = new Date();
cell21.setCellStyle(styleDate);
cell21.setCellValue(val21);

//double
Cell cell30 = rows[3].createCell(0);
double val30 = 1234.56;
cell30.setCellValue(val30);

//double 格式化
CellStyle styleDouble = wb.createCellStyle();
DataFormat formatDouble = wb.createDataFormat();
styleDouble.setDataFormat(formatDouble.getFormat("#,##0.00"));
Cell cell31 = rows[3].createCell(1);
double val31 = 1234.56;
cell31.setCellStyle(styleDouble);
cell31.setCellValue(val31);

//String
Cell cell40 = rows[4].createCell(0);
HSSFRichTextString val40 = new HSSFRichTextString("Test漢字");
cell40.setCellValue(val40);

2七、設置單元格邊線

wb.getSheet("sheetname2").setColumnWidth(1, 4096);

Row row1 = wb.getSheet("sheetname2").createRow(1);
row1.setHeightInPoints(70);

Cell cell1_1 = row1.createCell(1);
cell1_1.setCellValue("Sample");

CellStyle style = wb.createCellStyle();

style.setBorderTop(CellStyle.BORDER_DASHED);
style.setBorderBottom(CellStyle.BORDER_DOUBLE);
style.setBorderLeft(CellStyle.BORDER_MEDIUM_DASH_DOT);
style.setBorderRight(CellStyle.BORDER_MEDIUM);

style.setTopBorderColor(IndexedColors.MAROON.getIndex());
style.setBottomBorderColor(IndexedColors.SKY_BLUE.getIndex());
style.setLeftBorderColor(IndexedColors.ORANGE.getIndex());
style.setRightBorderColor(IndexedColors.BLUE_GREY.getIndex());

cell1_1.setCellStyle(style);

2八、設置單元格背景填充

wb.getSheet("sheetname3").setColumnWidth(0, 4096);
wb.getSheet("sheetname3").setColumnWidth(1, 4096);
wb.getSheet("sheetname3").setColumnWidth(2, 4096);

Row row1 = wb.getSheet("sheetname3").createRow(1);
row1.setHeightInPoints(70);

Cell cell1_0 = row1.createCell(0);
Cell cell1_1 = row1.createCell(1);
Cell cell1_2 = row1.createCell(2);

cell1_0.setCellValue("THIN_VERT_BANDS");
cell1_1.setCellValue("BIG_SPOTS");
cell1_2.setCellValue("THICK_HORZ_BANDS");

CellStyle style1 = wb.createCellStyle();
style1.setFillPattern(CellStyle.THIN_VERT_BANDS);
style1.setFillForegroundColor(IndexedColors.WHITE.getIndex());
style1.setFillBackgroundColor(IndexedColors.BLUE.getIndex());

CellStyle style2 = wb.createCellStyle();
style2.setFillPattern(CellStyle.BIG_SPOTS);
style2.setFillForegroundColor(IndexedColors.RED.getIndex());
style2.setFillBackgroundColor(IndexedColors.WHITE.getIndex());

CellStyle style3 = wb.createCellStyle();
style3.setFillPattern(CellStyle.THICK_HORZ_BANDS);
style3.setFillForegroundColor(IndexedColors.PINK.getIndex());
style3.setFillBackgroundColor(IndexedColors.BROWN.getIndex());

cell1_0.setCellStyle(style1);
cell1_1.setCellStyle(style2);
cell1_2.setCellStyle(style3);

2九、設置單元格註釋

HSSFCreationHelper createHelper =
    (HSSFCreationHelper)wb.getCreationHelper();
Drawing patriarch = wb.getSheet("sheetname4").createDrawingPatriarch();

//註釋
Row row = wb.getSheet("sheetname4").createRow(1);
Cell cell = row.createCell(1);

HSSFClientAnchor clientAnchor = new HSSFClientAnchor(0, 0, 0, 0,
        (short) 4, 2, (short) 6, 5);

Comment comment = patriarch.createCellComment(clientAnchor);
comment.setString(createHelper.createRichTextString("註釋註釋111"));
comment.setAuthor("rensanning");

cell.setCellComment(comment);

//帶字體的註釋
Row row2 = wb.getSheet("sheetname4").createRow(2);
Cell cell2 = row2.createCell(1);

Font font = wb.createFont();
font.setFontName("宋體");
font.setFontHeightInPoints((short)10);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setColor(HSSFColor.RED.index);

Comment comment2 = patriarch.createCellComment(clientAnchor);
HSSFRichTextString text = new HSSFRichTextString("註釋註釋222");
text.applyFont(font);
comment2.setString(text);
comment2.setAuthor("rensanning");

cell2.setCellComment(comment2);

30、設置單元格字體（斜體，粗體，下線，取消線，字體，大小，背景色）

Font font = null;
CellStyle style = null;

//斜體
font = wb.createFont();
font.setItalic(true);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(1).getCell(1).setCellStyle(style);

//粗體
font = wb.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(2).getCell(1).setCellStyle(style);

//字體名
font = wb.createFont();
font.setFontName("Courier New");
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(3).getCell(1).setCellStyle(style);

//字體大小
font = wb.createFont();
font.setFontHeightInPoints((short)20);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(4).getCell(1).setCellStyle(style);

//文字顏色
font = wb.createFont();
font.setColor(HSSFColor.YELLOW.index);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(5).getCell(1).setCellStyle(style);
        
//上標
font = wb.createFont();
font.setTypeOffset(HSSFFont.SS_SUPER);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(6).getCell(1).setCellStyle(style);

//下標
font = wb.createFont();
font.setTypeOffset(HSSFFont.SS_SUB);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(7).getCell(1).setCellStyle(style);

//刪除線
font = wb.createFont();
font.setStrikeout(true);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(8).getCell(1).setCellStyle(style);

//下劃線
font = wb.createFont();
font.setUnderline(HSSFFont.U_SINGLE);
style = wb.createCellStyle();
style.setFont(font);

wb.getSheet("sheetname5").getRow(9).getCell(1).setCellStyle(style);

//背景色
style = wb.createCellStyle();
style.setFillForegroundColor(HSSFColor.SEA_GREEN.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

style.setFont(font);

wb.getSheet("sheetname5").getRow(10).getCell(1).setCellStyle(style);

3一、設置超連接

HSSFCreationHelper createHelper =
    (HSSFCreationHelper)wb.getCreationHelper();

CellStyle style = wb.createCellStyle();
Font font = wb.createFont();
font.setUnderline(HSSFFont.U_SINGLE);
font.setColor(HSSFColor.BLUE.index);
style.setFont(font);
        
//追加行
Row[] rows = new Row[10];
for (int i = 0; i < 10; i++) {
    rows[i] = wb.getSheet("sheetname6").createRow(i);
}

//URL
rows[0].createCell(0).setCellValue("URL Link");

HSSFHyperlink link1 = createHelper.createHyperlink(HSSFHyperlink.LINK_URL);
link1.setAddress("http://poi.apache.org/");
rows[0].getCell(0).setHyperlink(link1);
rows[0].getCell(0).setCellStyle(style);

//Mail
rows[1].createCell(0).setCellValue("Email Link");

HSSFHyperlink link2 = createHelper.createHyperlink(HSSFHyperlink.LINK_EMAIL);
link2.setAddress("mailto:poi@apache.org?subject=Hyperlinks");
rows[1].getCell(0).setHyperlink(link2);
rows[1].getCell(0).setCellStyle(style);

//File
rows[2].createCell(0).setCellValue("File Link");

HSSFHyperlink link3 = createHelper.createHyperlink(HSSFHyperlink.LINK_FILE);
link3.setAddress("link.xls");
rows[2].getCell(0).setHyperlink(link3);
rows[2].getCell(0).setCellStyle(style);

//Workbook內
rows[3].createCell(0).setCellValue("Worksheet Link");

HSSFHyperlink link4 = createHelper.createHyperlink(HSSFHyperlink.LINK_DOCUMENT);
link4.setAddress("sheetname1!A1");
rows[3].getCell(0).setHyperlink(link4);
rows[3].getCell(0).setCellStyle(style);

3二、設置單元格橫向對齊，縱向對齊

//橫向對齊
wb.getSheet("sheetname7").setColumnWidth(2, 3072);

Row[] row = new Row[7];
Cell[] cell = new Cell[7];

for (int i = 0 ; i < 7 ; i++){
  row[i] = wb.getSheet("sheetname7").createRow(i + 1);
  cell[i] = row[i].createCell(2);
  cell[i].setCellValue("Please give me a receipt");
}

CellStyle style0 = wb.createCellStyle();
style0.setAlignment(CellStyle.ALIGN_GENERAL);
cell[0].setCellStyle(style0);

CellStyle style1 = wb.createCellStyle();
style1.setAlignment(CellStyle.ALIGN_LEFT);
cell[1].setCellStyle(style1);

CellStyle style2 = wb.createCellStyle();
style2.setAlignment(CellStyle.ALIGN_CENTER);
cell[2].setCellStyle(style2);

CellStyle style3 = wb.createCellStyle();
style3.setAlignment(CellStyle.ALIGN_RIGHT);
cell[3].setCellStyle(style3);

CellStyle style4 = wb.createCellStyle();
style4.setAlignment(CellStyle.ALIGN_FILL);
cell[4].setCellStyle(style4);

CellStyle style5 = wb.createCellStyle();
style5.setAlignment(CellStyle.ALIGN_JUSTIFY);
cell[5].setCellStyle(style5);

CellStyle style6 = wb.createCellStyle();
style6.setAlignment(CellStyle.ALIGN_CENTER_SELECTION);
cell[6].setCellStyle(style6);

//縱向對齊
Row row2 = wb.getSheet("sheetname8").createRow(1);
row2.setHeightInPoints(70);
Cell[] cell2 = new Cell[4];

for (int i = 0 ; i < 4 ; i++){
    cell2[i] = row2.createCell(i + 1);
    cell2[i].setCellValue("Please give me a receipt");
}

CellStyle style02 = wb.createCellStyle();
style02.setVerticalAlignment(CellStyle.VERTICAL_TOP);
cell2[0].setCellStyle(style02);

CellStyle style12 = wb.createCellStyle();
style12.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
cell2[1].setCellStyle(style12);

CellStyle style22 = wb.createCellStyle();
style22.setVerticalAlignment(CellStyle.VERTICAL_BOTTOM);
cell2[2].setCellStyle(style22);

CellStyle style32 = wb.createCellStyle();
style32.setVerticalAlignment(CellStyle.VERTICAL_JUSTIFY);
cell2[3].setCellStyle(style32);

3三、設置單元格旋轉角度

Row[] row = new Row[4];
Cell[] cell = new Cell[4];

for (int i = 0 ; i < 4 ; i++){
  row[i] = wb.getSheet("sheetname9").createRow(i + 1);
  cell[i] = row[i].createCell(2);
  cell[i].setCellValue("Coffee");
}

CellStyle style0 = wb.createCellStyle();
style0.setRotation((short)45);
cell[0].setCellStyle(style0);

CellStyle style1 = wb.createCellStyle();
style1.setRotation((short)0);
cell[1].setCellStyle(style1);

CellStyle style2 = wb.createCellStyle();
style2.setRotation((short)-45);
cell[2].setCellStyle(style2);

CellStyle style3 = wb.createCellStyle();
style3.setRotation((short)-90);
cell[3].setCellStyle(style3);

3四、設置單元格自動換行

Row[] row = new Row[2];
Cell[] cell = new Cell[2];

for (int i = 0 ; i < 2 ; i++){
  row[i] = wb.getSheet("sheetname10").createRow(i + 1);
  cell[i] = row[i].createCell(2);
  cell[i].setCellValue("Thank you very much.");
}

CellStyle style0 = wb.createCellStyle();
style0.setWrapText(true);
cell[0].setCellStyle(style0);

CellStyle style1 = wb.createCellStyle();
style1.setWrapText(false);
cell[1].setCellStyle(style1);

3五、設置單元格文字縮進

Row[] row = new Row[4];
Cell[] cell = new Cell[4];

for (int i = 0 ; i < 4 ; i++){
  row[i] = wb.getSheet("sheetname11").createRow(i + 1);
  cell[i] = row[i].createCell(2);
  cell[i].setCellValue("Coffee");
}

CellStyle style1 = wb.createCellStyle();
style1.setIndention((short)1);
style1.setAlignment(CellStyle.ALIGN_LEFT);
cell[1].setCellStyle(style1);

CellStyle style2 = wb.createCellStyle();
style2.setIndention((short)2);
style2.setAlignment(CellStyle.ALIGN_LEFT);
cell[2].setCellStyle(style2);

CellStyle style3 = wb.createCellStyle();
style3.setIndention((short)3);
style3.setAlignment(CellStyle.ALIGN_LEFT);
cell[3].setCellStyle(style3);

3六、自定義格式

Row[] rows = new Row[2];
for (int i = 0; i < rows.length; i++) {
    rows[i] = wb.getSheet("sheetname12").createRow(i + 1);
}
DataFormat format = wb.createDataFormat();

CellStyle[] styles = new CellStyle[2];
for (int i = 0; i < styles.length; i++) {
    styles[i] = wb.createCellStyle();
}
styles[0].setDataFormat(format.getFormat("0.0"));
styles[1].setDataFormat(format.getFormat("#,##0.000"));

Cell[] cells = new Cell[2];
for (int i = 0; i < cells.length; i++)  {
    cells[i] = rows[i].createCell(1);
    cells[i].setCellValue(1111.25);

    cells[i].setCellStyle(styles[i]);
}

3七、設置公式

Row row1 = wb.getSheet("sheetname13").createRow(1);
Row row2 = wb.getSheet("sheetname13").createRow(2);

Cell cell1_1 = row1.createCell(1);
Cell cell1_2 = row1.createCell(2);
Cell cell1_3 = row1.createCell(3);
Cell cell2_3 = row2.createCell(3);

cell1_1.setCellValue(30);
cell1_2.setCellValue(25);
cell1_3.setCellFormula("B2+C2");
cell2_3.setCellFormula("MOD(B2,C2)");

3八、畫直線，圓圈（橢圓），正方形（長方形）,Textbox

HSSFPatriarch patriarch = ((HSSFSheet)wb.getSheet("sheetname14")).createDrawingPatriarch();

//直線
HSSFClientAnchor clientAnchor1 = new HSSFClientAnchor(0, 0, 0, 0,
        (short) 4, 2, (short) 6, 5);
HSSFSimpleShape shape1 = patriarch.createSimpleShape(clientAnchor1);
shape1.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);

//圓圈（橢圓）
HSSFClientAnchor clientAnchor2 = new HSSFClientAnchor(0, 0, 0, 0,
        (short) 8, 4, (short) 6, 5);
HSSFSimpleShape shape2 = patriarch.createSimpleShape(clientAnchor2);
shape2.setShapeType(HSSFSimpleShape.OBJECT_TYPE_OVAL);

//正方形（長方形）
HSSFClientAnchor clientAnchor3 = new HSSFClientAnchor(0, 0, 0, 0,
        (short) 12, 6, (short) 6, 5);
HSSFSimpleShape shape3 = patriarch.createSimpleShape(clientAnchor3);
shape3.setShapeType(HSSFSimpleShape.OBJECT_TYPE_RECTANGLE);

//Textbox
HSSFClientAnchor clientAnchor4 = new HSSFClientAnchor(0, 0, 0, 0,
        (short) 14, 8, (short) 6, 5);
HSSFTextbox textbox = patriarch.createTextbox(clientAnchor4);
textbox.setString(new HSSFRichTextString("This is a test"));

3九、插入圖片

//須要commons-codec-1.6.jar
FileInputStream jpeg = new FileInputStream("resource/test.jpg");
byte[] bytes = IOUtils.toByteArray(jpeg);
int pictureIndex = wb.addPicture(bytes, HSSFWorkbook.PICTURE_TYPE_JPEG);
jpeg.close();

HSSFCreationHelper helper = (HSSFCreationHelper) wb.getCreationHelper();

HSSFPatriarch patriarch = ((HSSFSheet)wb.getSheet("sheetname15")).createDrawingPatriarch();

HSSFClientAnchor clientAnchor = helper.createClientAnchor();

clientAnchor.setCol1(3);
clientAnchor.setRow1(2);

HSSFPicture picture = patriarch.createPicture(clientAnchor, pictureIndex);
picture.resize();

40、設置可輸入List

CellRangeAddressList addressList = new CellRangeAddressList(
        0,
        0,
        0,
        0);

final String[] DATA_LIST = new String[] {
        "10",
        "20",
        "30",
};
DVConstraint dvConstraint =
    DVConstraint.createExplicitListConstraint(DATA_LIST);

HSSFDataValidation dataValidation = new HSSFDataValidation(addressList, dvConstraint);
dataValidation.setSuppressDropDownArrow(false);

wb.getSheet("sheetname16").addValidationData(dataValidation);

4一、設置輸入提示信息

CellRangeAddressList addressList = new CellRangeAddressList(
        0,
        0,
        0,
        0);

final String[] DATA_LIST = new String[] {
        "10",
        "20",
        "30",
};
DVConstraint dvConstraint = DVConstraint.createExplicitListConstraint(DATA_LIST);

HSSFDataValidation dataValidation =
    new HSSFDataValidation(addressList, dvConstraint);
dataValidation.setSuppressDropDownArrow(false);
dataValidation.createPromptBox("輸入提示", "請從下拉列表中選擇！");
dataValidation.setShowPromptBox(true);

wb.getSheet("sheetname17").addValidationData(dataValidation);