Java POI 写入Excel

Apache POI 是用Java编写的免费开源的跨平台的 Java API，Apache POI提供API给Java程式对Microsoft Office格式档案读和写的功能。 

Apache POI 是创建和维护操作各种符合Office Open XML（OOXML）标准和微软的OLE 2复合文档格式（OLE2）的Java API。用它可以使用Java读取和创建,修改MS Excel文件.而且,还可以使用Java读取和创建MS Word和MSPowerPoint文件。Apache POI 提供Java操作Excel解决方案（适用于Excel97-2008）。 

如果处理.xlsx、docx、pptx的话可以试试Docx4j 。 
Docx4j is a Java library for creating and manipulating Microsoft Open XML (Word docx, Powerpoint pptx, and Excel xlsx) files.  

• HSSF － 提供读写Microsoft Excel XLS格式档案的功能。
• XSSF － 提供读写Microsoft Excel OOXML XLSX格式档案的功能。
• HWPF － 提供读写Microsoft Word DOC格式档案的功能。
• HSLF － 提供读写Microsoft PowerPoint格式档案的功能。
• HDGF － 提供读Microsoft Visio格式档案的功能。
• HPBF － 提供读Microsoft Publisher格式档案的功能。
• HSMF － 提供读Microsoft Outlook格式档案的功能。

http://poi.apache.org/  

Busy Developers' Guide to HSSF and XSSF Features  

版本：poi-3.8-20120326.jar 

1、生成Workbook  

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

 //添加Worksheet（不添加sheet时生成的xls文件打开时会报错）
 @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");

 //保存为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());
     }
 }

2、生成Workbook OOXML形式(.xlsx)  

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

 //......

3、打开Workbook  

 //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();

4、打开加密的Workbook(读加密)  

 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();

5、追加Sheet  

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

6、复制Sheet  

 wb.cloneSheet(1);

7、修改Sheet名称  

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

8、删除Sheet  

 wb.removeSheetAt(1);

9、设置下部Sheet名的Tab的第一个可见Tab  

 //设置下部Sheet名的Tab的第一个可见Tab（以左的Sheet看不见）
 wb.setFirstVisibleTab(2);

10、调整Sheet顺序  

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

11、设置当前Sheet  
t.setActiveSheet(); 

 //设置当前Sheet
 wb.setActiveSheet(wb.getNumberOfSheets() - 1);
 //（Excel的当前Sheet被设置，需要结合setSelected使用，不然下部Sheet名的Tab还是默认为第一个）
 //（需要选择多个Sheet的话，每个Sheet调用setSelected(true)即可）
 wb.getSheetAt(wb.getNumberOfSheets() - 1).setSelected(true);

12、固定窗口  

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

 

13、分割窗口  

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

 

14、Sheet缩放  

 //setZoom(int numerator, int denominator)
 //"numerator"÷"denominator"  例如： 3÷1＝3 那就是设置为300%

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

 

15、行列分组  

 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);

16、关闭分组  

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

17、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("中国");

18、删除行  

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

19、移动行  

 //******移动行只移动内容，不牵扯行的删除和插入

 //移动行（把第1行和第2行移到第5行之后）
 wb.getSheet("sheetname5").shiftRows(0, 1, 5);

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

20、修改行高  

 //设置默认行高
 wb.getSheet("sheetname6").setDefaultRowHeight((short)100);

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

21、修改列宽  

 //设置默认列宽
 wb.getSheet("sheetname7").setDefaultColumnWidth(12);

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

22、不显示网格线  

 //不显示网格线
 wb.getSheet("sheetname8").setDisplayGridlines(false);

 

23、设置分页  

 //设置第一页：3行2列 （可以多次设置）
 wb.getSheet("sheetname9").setRowBreak(2);
 wb.getSheet("sheetname9").setColumnBreak(1);

 

24、添加，删除，合并单元格  

 //追加行
 for (int i = 0; i < 10; i++) {
     Row row = wb.getSheet("sheetname10").createRow(i);
     for (int j = 0; j < 10; j++) {
         //添加单元格
         Cell cell = row.createCell(j);
         cell.setCellValue(i + 1);
     }

     //删除单元格
     row.removeCell(row.getCell(5));
 }

 //合并单元格
 //CellRangeAddress(int firstRow, int lastRow, int firstCol, int lastCol)
 wb.getSheet("sheetname10").addMergedRegion(new CellRangeAddress(1, 4, 2, 3));

 

25、设置Header，Footer  

 //Header
 Header header = wb.getSheet("sheetname11").getHeader();
 header.setLeft(HSSFHeader.startUnderline() +
         HSSFHeader.font("宋体", "Italic") +
         "文字文字" +
         HSSFHeader.endUnderline());
 header.setCenter(HSSFHeader.fontSize((short)16) +
         HSSFHeader.startDoubleUnderline() +
         HSSFHeader.startBold() +
         "汉字汉字" +
         HSSFHeader.endBold() +
         HSSFHeader.endDoubleUnderline());
 header.setRight("打印时间:" + 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());

 
 

26、设置单元格值  

 //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汉字");
 cell40.setCellValue(val40);

 

27、设置单元格边线  

 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);

 

28、设置单元格背景填充  

 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);

 

29、设置单元格注释  

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

 //注释
 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("注释注释111"));
 comment.setAuthor("rensanning");

 cell.setCellComment(comment);

 //带字体的注释
 Row row2 = wb.getSheet("sheetname4").createRow(2);
 Cell cell2 = row2.createCell(1);

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

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

 cell2.setCellComment(comment2);

30、设置单元格字体（斜体，粗体，下线，取消线，字体，大小，背景色）  

 Font font = null;
 CellStyle style = null;

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

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

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

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

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

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

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

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

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

 wb.getSheet("sheetname5").getRow(5).getCell(1).setCellStyle(style);

 //上标
 font = wb.createFont();
 font.setTypeOffset(HSSFFont.SS_SUPER);
 style = wb.createCellStyle();
 style.setFont(font);

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

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

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

 //删除线
 font = wb.createFont();
 font.setStrikeout(true);
 style = wb.createCellStyle();
 style.setFont(font);

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

 //下划线
 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);

 

31、设置超链接  

 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:[email protected]?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内
 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);

32、设置单元格横向对齐，纵向对齐  

 //横向对齐
 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);

 //纵向对齐
 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);

 

33、设置单元格旋转角度  

 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);

 

34、设置单元格自动折行  

 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);

 

35、设置单元格文字缩进  

 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);

 

36、自定义格式  

 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]);
 }

 

37、设置公式  

 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)");

 

38、画直线，圆圈（椭圆），正方形（长方形）,Textbox  

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

 //直线
 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);

 //圆圈（椭圆）
 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（长方形）
 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"));

39、插入图片  

 //需要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、设置可输入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);

 

41、设置输入提示信息  

 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("输入提示", "请从下拉列表中选择！");
 dataValidation.setShowPromptBox(true);

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