java excel导出

工具类

/**
	 * 导出excel
	 * @param title
	 * @param rowTitles
	 * @param dataArray
	 * @param response
	 */
	public static void exportExcelByResource(String title,String[] rowTitles,JSONArray dataArray,ResourceResponse response) {
		HSSFWorkbook workbook = new HSSFWorkbook();// 创建一个Excel文件
		HSSFSheet sheet = workbook.createSheet();// 创建一个Excel的Sheet
		sheet.setDefaultColumnWidth(13);

		// 生成一个标题样式
		HSSFCellStyle titleStyle = workbook.createCellStyle();
		titleStyle.setAlignment(CellStyle.ALIGN_CENTER);// 水平居中
		titleStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 垂直居中
		titleStyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex());
		// 生成一个字体
		HSSFFont titleFont = workbook.createFont();
		titleFont.setFontHeightInPoints((short) 12);
		titleFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		// 把字体应用到当前的样式
		titleStyle.setFont(titleFont);

		// 生成一个普通样式
		HSSFCellStyle style = workbook.createCellStyle();
		style.setAlignment(CellStyle.ALIGN_CENTER);// 水平居中
		style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 垂直居中
		// 生成一个字体
		HSSFFont font = workbook.createFont();
		font.setFontHeightInPoints((short) 11);
		// 把字体应用到当前的样式
		style.setFont(font);

		// 创建标题行
		HSSFRow titleRow = sheet.createRow(0);
		for (int i = 0; i < rowTitles.length; i++) {
			HSSFCell cell = titleRow.createCell(i);
			cell.setCellStyle(titleStyle);
			HSSFRichTextString text = new HSSFRichTextString(rowTitles[i]);
			cell.setCellValue(text);
		}

		if (dataArray != null && dataArray.length() > 0) {
			for (int i = 0; i < dataArray.length(); i++) {
				HSSFRow row = sheet.createRow(i + 1);
				JSONObject json = dataArray.getJSONObject(i);
				for (int j = 0; j < rowTitles.length; j++) {
					HSSFCell cell = row.createCell(j);
					cell.setCellStyle(style);
					String jsonStr = json.getString(rowTitles[j]);
					HSSFRichTextString text = new HSSFRichTextString(jsonStr);
					cell.setCellValue(text);
				}
			}
		}
		try {
			OutputStream output = new BufferedOutputStream(
					response.getPortletOutputStream());
			response.reset();
			String fileName = new String(title.getBytes("GBK"), "ISO8859-1")
					.replaceAll("/", "");
			response.addProperty(HttpHeaders.CONTENT_DISPOSITION,
					"attachment; filename="+fileName);
			response.setContentType("application/vnd.ms-excel");
			workbook.write(output);
			output.flush();
			output.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

调用示例

JSONArray dataArray = null;
        try {
            dataArray = IctOrderPlanLocalServiceUtil
                    .getIctPlanJsonArray(request);
        } catch (PortalException e1) {
            e1.printStackTrace();
        } catch (SystemException e1) {
            e1.printStackTrace();
        }
        String[] rowTitles = { "周期", "周数", "项目名称", "本周工作", "下步计划", "项目经理",
                "创建时间" };
        String title = "周报报表.xls";
        ExcelUtil.exportExcelByResource(title, rowTitles, dataArray, response);

        super.serveResource(request, response);