java poi excel操作示例

使用poi3.9版本使用的示例

参考：http://poi.apache.org/spreadsheet/quick-guide.html

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;

import org.apache.poi.hssf.usermodel.HSSFHeader;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Drawing;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Header;
import org.apache.poi.ss.usermodel.Name;
import org.apache.poi.ss.usermodel.RichTextString;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

//http://poi.apache.org/spreadsheet/quick-guide.html
public class ExcelParseUtil {

	public static void test() throws IOException {
		Workbook wb = new HSSFWorkbook();
		FileOutputStream fileOut = new FileOutputStream(
				"E:\\logs\\workbook.xls");
		Sheet sheet1 = wb.createSheet("new sheet");
		Sheet sheet2 = wb.createSheet("second sheet");

		// 设置sheet的标题
		Header header = sheet1.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");

		// 合并单元格
		sheet1.groupRow(5, 14);
		sheet1.groupRow(7, 14);
		sheet1.groupRow(16, 19);

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

		sheet1.addMergedRegion(new CellRangeAddress(1, // first row (0-based)
				1, // last row (0-based)
				1, // first column (0-based)
				2 // last column (0-based)
		));

		// 设置图片
		// Create the drawing patriarch. This is the top level container for all
		// shapes.
		// Drawing drawing = sheet1.createDrawingPatriarch();
		//
		// //add a picture shape
		// ClientAnchor anchor = helper.createClientAnchor();
		// //set top-left corner of the picture,
		// //subsequent call of Picture#resize() will operate relative to it
		// anchor.setCol1(3);
		// anchor.setRow1(2);
		// Picture pict = drawing.createPicture(anchor, pictureIdx);
		//
		// //auto-size picture relative to its top-left corner
		// pict.resize();

		String sname = "TestSheet", cname = "TestName", cvalue = "TestVal";
		Name namedCell = wb.createName();
		namedCell.setNameName(cname);
		String reference = sname + "!A1:A1"; // area reference
		namedCell.setRefersToFormula(reference);

		// 2. create named range for a single cell using cellreference
		// Name namedCel2 = wb.createName();
		// namedCel2.setNameName(cname);
		// reference = sname+"!A1"; // cell reference
		// namedCel2.setRefersToFormula(reference);
		//
		// // 3. create named range for an area using AreaReference
		// Name namedCel3 = wb.createName();
		// namedCel3.setNameName(cname);
		// reference = sname+"!A1:C5"; // area reference
		// namedCel3.setRefersToFormula(reference);
		//
		// // 4. create named formula
		// Name namedCel4 = wb.createName();
		// namedCel4.setNameName("my_sum");
		// namedCel4.setRefersToFormula("SUM(sname+!$I$2:$I$6)");

		// Note that sheet name is Excel must not exceed 31 characters
		// and must not contain any of the any of the following characters:
		// 0x0000
		// 0x0003
		// colon (:)
		// backslash (\)
		// asterisk (*)
		// question mark (?)
		// forward slash (/)
		// opening square bracket ([)
		// closing square bracket (])

		// You can use
		// org.apache.poi.ss.util.WorkbookUtil#createSafeSheetName(String
		// nameProposal)}
		// for a safe way to create valid names, this utility replaces invalid
		// characters with a space (' ')"

		//设置单元格值
		// Create a row and put some cells in it. Rows are 0 based.
		Row row = sheet1.createRow((short) 0);
		// Create a cell and put a value in it.
		Cell cell = row.createCell(0);
		cell.setCellValue(1);

		// Or do it on one line.
		row.createCell(1).setCellValue(1.2);
		row.createCell(2).setCellValue("This is a string");
		row.createCell(3).setCellValue(true);

		Row row2 = sheet2.createRow(0);

		// Create a cell and put a date value in it. The first cell is not
		// styled
		// as a date.
		Cell cell2 = row2.createCell(0);
		cell2.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.
		//设置单元格日期格式
		CellStyle cellStyle = wb.createCellStyle();
		DataFormat format = wb.createDataFormat();
		cellStyle.setDataFormat(format.getFormat("yyyy/mm/dd"));
		// style.setDataFormat(format.getFormat("#,##0.0000"));

		//设置单元格字体
		Font font = wb.createFont();
		font.setFontHeightInPoints((short) 24);
		font.setFontName("Courier New");
		font.setItalic(true);
		font.setStrikeout(true);
		font.setBoldweight(Font.BOLDWEIGHT_BOLD);

		cellStyle.setFont(font);
		cellStyle.setWrapText(true);

		cell2 = row2.createCell(1);
		cell2.setCellValue(new Date());
		cell2.setCellStyle(cellStyle);

		// you can also set date as java.util.Calendar
		cell2 = row2.createCell(2);
		cell2.setCellValue(Calendar.getInstance());
		cell2.setCellStyle(cellStyle);

		// 註釋
		// Create the comment and set the text+author
		CreationHelper factory = wb.getCreationHelper();
		// When the comment box is visible, have it show in a 1x3 space
		ClientAnchor anchor = factory.createClientAnchor();
		anchor.setCol1(cell.getColumnIndex());
		anchor.setCol2(cell.getColumnIndex() + 1);
		anchor.setRow1(row.getRowNum());
		anchor.setRow2(row.getRowNum() + 3);
		Drawing drawing = sheet1.createDrawingPatriarch();
		Comment comment = drawing.createCellComment(anchor);
		RichTextString str = factory.createRichTextString("Hello, World!");
		comment.setString(str);
		comment.setAuthor("Apache POI");

		// Assign the comment to the cell
		cell.setCellComment(comment);

		// Hyperlink link = createHelper.createHyperlink(Hyperlink.LINK_URL);
		// link.setAddress("http://poi.apache.org/");
		// cell.setHyperlink(link);
		// cell.setCellStyle(cellStyle);

		Row row3 = sheet2.createRow((short) 2);
		row3.createCell(0).setCellValue(1.1);
		row3.createCell(1).setCellValue(new Date());
		row3.createCell(2).setCellValue(Calendar.getInstance());
		row3.createCell(3).setCellValue("a string");
		row3.createCell(4).setCellValue(true);
		row3.createCell(5).setCellType(Cell.CELL_TYPE_ERROR);

		//获取sheet的每个单元格的值
		Sheet sheet = wb.getSheetAt(0);
		for (Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();) {
			Row row4 = rit.next();
			for (Iterator<Cell> cit = row4.cellIterator(); cit.hasNext();) {
				Cell cell4 = cit.next();
				// do something here
			}
		}

		Sheet sheet5 = wb.getSheetAt(1);
		for (Row row5 : sheet5) {
			for (Cell cell5 : row5) {
				CellReference cellRef = new CellReference(row5.getRowNum(),
						cell5.getColumnIndex());
				System.out.print(cellRef.formatAsString());
				System.out.print(" - ");

				switch (cell5.getCellType()) {
				case Cell.CELL_TYPE_STRING:
					System.out.println(cell5.getRichStringCellValue()
							.getString());
					break;
				case Cell.CELL_TYPE_NUMERIC:
					if (DateUtil.isCellDateFormatted(cell5)) {
						System.out.println(cell5.getDateCellValue());
					} else {
						System.out.println(cell5.getNumericCellValue());
					}
					break;
				case Cell.CELL_TYPE_BOOLEAN:
					System.out.println(cell5.getBooleanCellValue());
					break;
				case Cell.CELL_TYPE_FORMULA:
					System.out.println(cell5.getCellFormula());
					break;
				default:
					System.out.println();
				}
			}
		}

		wb.write(fileOut);
		fileOut.close();
	}

	public void test2() throws IOException {
		Workbook wb = new XSSFWorkbook();
		FileOutputStream fileOut = new FileOutputStream("workbook.xlsx");
		wb.write(fileOut);
		fileOut.close();
	}

	public static void main(String[] args) throws IOException {
		test();
	}

}

输出：

A1 - 41258.65454309028
B1 - Sat Dec 15 15:42:32 CST 2012
C1 - Sat Dec 15 15:42:32 CST 2012
A3 - 1.1
B3 - 41258.65454322917
C3 - 41258.65454322917
D3 - a string
E3 - true
F3 -