poi操作excel(解析、导出)

项目中需要应用到excel解析,网上参考了一些例子做了一个demo,其它的不多说,直接上代码

main函数:

 

public class XlsMain {

	/**
	 * @param args
	 * @throws InvocationTargetException
	 * @throws IllegalAccessException
	 * @throws IllegalArgumentException
	 */
	public static void main(String[] args) throws IllegalArgumentException,
			IllegalAccessException, InvocationTargetException {
		try {
			ParseXls parseX = new ParseXls();
			List<PersonVO> personList = parseX.readXls();

			ExportExcel<PersonVO> ex = new ExportExcel<PersonVO>();
			String[] headers = { "姓名", "性别", "年龄", "职称", "部门" };
			List<PersonVO> dataset = new ArrayList<PersonVO>();
			for (PersonVO pVO : personList) {
				dataset.add(pVO);
			}

			try {
				OutputStream out = new FileOutputStream("d://excel//a.xls");
				ex.exportExcel(headers, dataset, out);
				out.close();
				JOptionPane.showMessageDialog(null, "导出成功!");
				System.out.println("excel导出成功!");
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}

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

}


导出函数:

/**
 * 利用开源组件POI3.0.2动态导出EXCEL文档
 * 转载时请保留以下信息,注明出处!
 * @author leno
 * @version v1.0
 * @param <T> 应用泛型,代表任意一个符合javabean风格的类
 * 注意这里为了简单起见,boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
 * byte[]表jpg格式的图片数据
 */
public class ExportExcel<T> {

	public void exportExcel(Collection<T> dataset, OutputStream out) {
		exportExcel("测试POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection<T> dataset,
			OutputStream out) {
		exportExcel("测试POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection<T> dataset,
			OutputStream out, String pattern) {
		exportExcel("测试POI导出EXCEL文档", headers, dataset, out, pattern);
	}

	@SuppressWarnings("unchecked")
	public void exportExcel(String title, String[] headers,
			Collection<T> dataset, OutputStream out, String pattern) {
		// 声明一个工作薄
		HSSFWorkbook workbook = new HSSFWorkbook();
		// 生成一个表格
		HSSFSheet sheet = workbook.createSheet(title);
		// 设置表格默认列宽度为15个字节
		sheet.setDefaultColumnWidth((short) 15);
		// 生成一个样式
		HSSFCellStyle style = workbook.createCellStyle();
		// 设置这些样式
		style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
		style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		// 生成一个字体
		HSSFFont font = workbook.createFont();
		font.setColor(HSSFColor.VIOLET.index);
		font.setFontHeightInPoints((short) 12);
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		// 把字体应用到当前的样式
		style.setFont(font);
		// 生成并设置另一个样式
		HSSFCellStyle style2 = workbook.createCellStyle();
		style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
		style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		// 生成另一个字体
		HSSFFont font2 = workbook.createFont();
		font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		// 把字体应用到当前的样式
		style2.setFont(font2);

		// 声明一个画图的顶级管理器
		HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
		// 定义注释的大小和位置,详见文档
		HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
				0, 0, 0, (short) 4, 2, (short) 6, 5));
		// 设置注释内容
		comment.setString(new HSSFRichTextString("可以在POI中添加注释!"));
		// 设置注释作者,当鼠标移动到单元格上是可以在状态栏中看到该内容.
		comment.setAuthor("leno");

		//产生表格标题行
		HSSFRow row = sheet.createRow(0);
		for (short i = 0; i < headers.length; i++) {
			HSSFCell cell = row.createCell(i);
			cell.setCellStyle(style);
			HSSFRichTextString text = new HSSFRichTextString(headers[i]);
			cell.setCellValue(text);
		}

		//遍历集合数据,产生数据行
		Iterator<T> it = dataset.iterator();
		int index = 0;
		while (it.hasNext()) {
			index++;
			row = sheet.createRow(index);
			T t = (T) it.next();
			//利用反射,根据javabean属性的先后顺序,动态调用getXxx()方法得到属性值
			Field[] fields = t.getClass().getDeclaredFields();
			for (short i = 0; i < fields.length; i++) {
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style2);
				Field field = fields[i];
				String fieldName = field.getName();
				String getMethodName = "get"
						+ fieldName.substring(0, 1).toUpperCase()
						+ fieldName.substring(1);
				try {
					Class tCls = t.getClass();
					Method getMethod = tCls.getMethod(getMethodName,
							new Class[] {});
					Object value = getMethod.invoke(t, new Object[] {});
					//判断值的类型后进行强制类型转换
					String textValue = null;
					if (value instanceof Boolean) {
						boolean bValue = (Boolean) value;
						textValue = "男";
						if (!bValue) {
							textValue = "女";
						}
					} else if (value instanceof Date) {
						Date date = (Date) value;
						SimpleDateFormat sdf = new SimpleDateFormat(pattern);
						textValue = sdf.format(date);
					} else if (value instanceof byte[]) {
						// 有图片时,设置行高为60px;
						row.setHeightInPoints(60);
						// 设置图片所在列宽度为80px,注意这里单位的一个换算
						sheet.setColumnWidth(i, (short) (35.7 * 80));
						// sheet.autoSizeColumn(i);
						byte[] bsValue = (byte[]) value;
						HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
								1023, 255, (short) 6, index, (short) 6, index);
						anchor.setAnchorType(2);
						patriarch.createPicture(anchor, workbook.addPicture(
								bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
					} else {
						//其它数据类型都当作字符串简单处理
						textValue = value.toString();
					}
					//如果不是图片数据,就利用正则表达式判断textValue是否全部由数字组成
					if (textValue != null) {
						Pattern p = Pattern.compile("^//d+(//.//d+)?$");
						Matcher matcher = p.matcher(textValue);
						if (matcher.matches()) {
							//是数字当作double处理
							cell.setCellValue(Double.parseDouble(textValue));
						} else {
							HSSFRichTextString richString = new HSSFRichTextString(
									textValue);
							HSSFFont font3 = workbook.createFont();
							font3.setColor(HSSFColor.BLUE.index);
							richString.applyFont(font3);
							cell.setCellValue(richString);
						}
					}
				} catch (SecurityException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (NoSuchMethodException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} finally {
					//清理资源
				}
			}

		}
		try {
			workbook.write(out);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}


解析函数

public class ParseXls {
	
	public List<PersonVO> readXls() throws IOException, IllegalArgumentException,
			IllegalAccessException, InvocationTargetException {
		InputStream is = new FileInputStream("D:\\excel\\xls_test2.xls");
		HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
		List<PersonVO> personList = new ArrayList<PersonVO>();

		// 循环工作表Sheet
		for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
			HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
			if (hssfSheet == null) {
				continue;
			}

			// 循环行Row
			for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
				HSSFRow hssfRow = hssfSheet.getRow(rowNum);
				if (hssfRow == null) {
					continue;
				}
				PersonVO personVO = new PersonVO();
				
				// 循环列Cell
				for (int cellNum = 0; cellNum <= hssfRow.getLastCellNum(); cellNum++) {
					HSSFCell hssfCell = hssfRow.getCell(cellNum);
					if (hssfCell == null) {
						continue;
					}
					
					personVO.setName(getValue(hssfRow.getCell(0)));
					personVO.setSex(getValue(hssfRow.getCell(1)));
					personVO.setAge(getValue(hssfRow.getCell(2)));
					personVO.setPosition(getValue(hssfRow.getCell(3)));
					personVO.setDept(getValue(hssfRow.getCell(4)));
					System.out.print(" " + getValue(hssfCell));
				}
				personList.add(personVO);
				System.out.println();
			}
		}
		return personList;
	}

	@SuppressWarnings("static-access")
	private String getValue(HSSFCell hssfCell) {
		if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
			return String.valueOf(hssfCell.getBooleanCellValue());
		} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
			return String.valueOf(hssfCell.getNumericCellValue());
		} else {
			return String.valueOf(hssfCell.getStringCellValue());
		}
	}
}


 

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