Struts2 生成excel 并下载poi方式

strtus2 生成excel并下载（poi方式）

 

可以直接在流里生成并下载到本地。

                    if (sList != null) {
            
                                int rows = 1;
		HSSFWorkbook wk = new HSSFWorkbook();
		HSSFSheet sheet = wk.createSheet("供求商机表");
		/*设置Excel单元格行高、列宽*/			
		sheet.setDefaultColumnWidth((short)15);
		/*设置 字体 大小 颜色*/
		HSSFFont font = wk.createFont();
		font.setFontHeightInPoints((short)14);	//字号
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 加粗
		font.setColor(HSSFColor.RED.index);		//颜色
		/* 把font加载到样式里 */
		CellStyle style = wk.createCellStyle();
		style.setFont(font);
		//
		HSSFFont font1 = wk.createFont();
		font1.setFontHeightInPoints((short)12);	//字号
		font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 加粗
		font1.setColor(HSSFColor.BLACK.index);		//颜色
		/* 把font加载到样式里 */
		CellStyle style1 = wk.createCellStyle();
		style1.setFont(font1);
		HSSFRow row = sheet.createRow(rows++);
		HSSFRow row0 = sheet.createRow(0);
		/* 合并单元格 */
		sheet.addMergedRegion(new CellRangeAddress(0, 0,  0,  4));
		HSSFCell cell0 = row0.createCell(0, HSSFCell.CELL_TYPE_STRING);
		cell0.setCellStyle(style);
		cell0.setCellValue(title);
		int column = 0;
			
		//"标 题", "联系人", "座 机", "手 机", "简 介
		HSSFCell cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("标 题");
		cell.setCellStyle(style1);
		cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("联系人");
		cell.setCellStyle(style1);
		cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("座 机");
		cell.setCellStyle(style1);
		cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("手 机");
		cell.setCellStyle(style1);
		cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("时 间");
		cell.setCellStyle(style1);
		cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
		cell.setCellValue("简 介");
		cell.setCellStyle(style1);
					for (SdProduct sdp : sList) {
				row = sheet.createRow(rows++);
				column = 0;
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_NUMERIC);
				cell.setCellValue(sdp.getSdTitle().replaceAll("<[^>]*>",""));
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
				cell.setCellValue(sdp.getSdConName());
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
				cell.setCellValue(sdp.getSdTel());
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
				cell.setCellValue(sdp.getSdMobile());
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
				cell.setCellValue(sdp.getSdUpdate());
				cell = row.createCell(column++, HSSFCell.CELL_TYPE_STRING);
				cell.setCellValue(sdp.getSdComment().replaceAll("<[^>]*>","").replaceAll("&nbsp;", ""));
			}
		} else {
			System.out.println("统计数据不存在");
		}
		try {
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			wk.write(out);
			requests.setAttribute("excelStream", new ByteArrayInputStream(
					out.toByteArray()));
			requests.setAttribute("filename", fileName);// 设置文件名
			return SUCCESS;
		} catch (Throwable th) {
			th.printStackTrace();
			System.out.println("无法输出Excel文件");
			return ERROR;
		}