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）。

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/

版本：poi-3.8-20120326.jar

1、生成Workbook

Java代码

//生成Workbook

        // 第一步，创建一个webbook，对应一个Excel文件  HSSFWorkbook wb = new HSSFWorkbook();  // 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet  HSSFSheet sheet = wb.createSheet("学生表一");  sheet.setDefaultColumnWidth(20);// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short  HSSFRow row = sheet.createRow(0);  // 第四步，创建单元格，并设置值表头 设置表头居中  HSSFCellStyle style = wb.createCellStyle();  style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式  HSSFCell cell = row.createCell(0);  cell.setCellValue("学号");  cell.setCellStyle(style);  cell = row.createCell( 1);  cell.setCellValue("姓名");  cell.setCellStyle(style);  cell = row.createCell(2);  cell.setCellValue("年龄");  cell.setCellStyle(style);  cell = row.createCell(3);  cell.setCellValue("生日");  cell.setCellStyle(style);  // 第五步，写入实体数据 实际应用中这些数据从数据库得到，  List list = CreateSimpleExcelToDisk.getStudent();  for (int i = 0; i < list.size(); i++)  {  row = sheet.createRow(i + 1);  Student stu = (Student) list.get(i);  // 第四步，创建单元格，并设置值  row.createCell(0).setCellValue(stu.getId());  row.createCell(1).setCellValue(stu.getName());  row.createCell(2).setCellValue(stu.getAge());  cell = row.createCell(3);  cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu  .getBirth()));  }  // 第六步，将文件存到指定位置  try  {  FileOutputStream fout = new FileOutputStream("D:/students.xls");  wb.write(fout);  fout.close();  }  catch (Exception e)  {  e.printStackTrace();  }

2、生成Workbook OOXML形式(.xlsx)

Java代码

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

3、打开Workbook

Java代码

//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)

Java代码

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

Java代码

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

6、复制Sheet

Java代码

wb.cloneSheet(1);

7、修改Sheet名称

Java代码

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

8、删除Sheet

Java代码

wb.removeSheetAt(1);

9、设置下部Sheet名的Tab的第一个可见Tab

Java代码

//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

Java代码

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

11、设置当前Sheet

Java代码

//设置当前Sheet

Integer active = wb.getActiveSheetIndex();
wb.setActiveSheet(wb.getNumberOfSheets() - 1);
wb.getSheetAt(wb.getNumberOfSheets() - 1).setSelected(true);
wb.getSheetAt(active).setSelected(false);

12、固定窗口

Java代码

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

13、分割窗口

Java代码

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

14、Sheet缩放

Java代码

//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

Java代码

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

Java代码

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

17、插入行

Java代码

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

Java代码

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

19、移动行

Java代码

//******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

Java代码

//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

Java代码

//设置默认列宽
wb.getSheet("sheetname7").setDefaultColumnWidth(12);
//设置列宽
wb.getSheet("sheetname7").setColumnWidth(0, 5 * 256);
//第一个参数是指第几列，从0开始，第二个参数是的单位是1/256个字符宽度，也就是说，这里是把B列的宽度设置为了40个字符
sheet.setColumnWidth(1,40 * 256);
//自适应宽度
sheet.autoSizeColumn((short)0); //调整第一列宽度

22、不显示网格线

Java代码

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

23、设置分页

Java代码

//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

Java代码

//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

Java代码

//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

Java代码

//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

Java代码

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

Java代码

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

Java代码

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）

Java代码

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

Java代码

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

Java代码

//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

Java代码

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

Java代码

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

Java代码

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

Java代码

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

Java代码

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

Java代码

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

Java代码

//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

Java代码

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

Java代码

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);

41、设置表格边框

HSSFCellStyle style = wb.createCellStyle();

style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
style.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
style.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框

43.POI的HSSFRichTextString的使用简介
在使用Apache的POI库生成EXCEL文件时，经常会遇到这样的情况：使用不同的格式格式化一个单元格中的内容，比如说：一个单元格的内容是“first, second”，现在要分别使用红色带删除线格式化"first", 使用蓝色格式化“second"，在这种情况下可以使用HSSFRichText来实现这一目的，下面的代码简单的示例了上述需求的实现：

//创建工作簿  HSSFWorkbook wb = new HSSFWorkbook();  //创建工作表  HSSFSheet sheet = wb.createSheet();  //为工作表添加行  HSSFRow row = sheet.createRow(0);  //添加单元格  HSSFCell cell = row.createCell(0);  //创建字体  HSSFFont ftRed = wb.createFont();  ftRed.setStrikeout(true);  ftRed.setColor(HSSFColor.RED.index);  HSSFFont ftBlue = wb.createFont();  ftBlue.setColor(HSSFColor.BLUE.index);  //往单元格中写入的内容,并使用ft格式化"second"单词  String[] subStr = {  "first", "second"  };  String sText = subStr[0] + "," + subStr[1];  HSSFRichTextString textString = new HSSFRichTextString(sText);  textString.applyFont(  sText.indexOf(subStr[0]),  sText.indexOf(subStr[0]) + subStr[0].length(),  ftRed  );  textString.applyFont(  sText.indexOf(subStr[1]),  sText.indexOf(subStr[1]) + subStr[1].length(),  ftBlue  );  cell.setCellValue(textString);

上述代码片段的生成效果为：

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