?在java web开发中,很多情况下都会用到导出excel数据的功能,下面我对我做的一个例子做下简单的介绍,希望对大家有所帮助。
java导出excel的方式有很多种,如利用poi导出,如利用jxl导出,现在我要说的就是利用jxl方式导出
首先,需要添加jar包:jxl.jar,其他java需要的包自行添加;
然后,请看下面代码:
class="java">/** * excel 文件下载操作 * @param result List数组,需要导出的对象列表 * @param response * @throws RowsExceededException * @throws WriteException * @throws IOException */ public static void downloadFile(List result, HttpServletResponse response) throws RowsExceededException, WriteException, IOException{ String xlsFileName = "subapplyinfo.xls"; WritableWorkbook book= Workbook.createWorkbook(new File(xlsFileName)); //生成名为"第一页"的工作表,参数0表示这是第一页 WritableSheet sheet=book.createSheet("第一页",0); //设置字体为宋体,11号字,加粗,颜色为黑色 WritableFont font1=new WritableFont(WritableFont.createFont("宋体"),11,WritableFont.BOLD); font1.setColour(Colour.BLACK); WritableCellFormat format1=new WritableCellFormat(font1); format1.setAlignment(jxl.format.Alignment.CENTRE); format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE); Label labelA = new Label(0,0,"申请类型",format1); Label labelB = new Label(1,0,"活动名称",format1); Label labelC = new Label(2,0,"姓名",format1); Label labelD = new Label(3,0,"性别",format1); Label labelE = new Label(4,0,"联系电话",format1); Label labelF = new Label(5,0,"意向车型",format1); Label labelG = new Label(6,0,"预约时间",format1); Label labelH = new Label(7,0,"邮箱地址",format1); Label labelI = new Label(8,0,"所在城市",format1); Label labelJ = new Label(9,0,"提交时间",format1); Label labelK = new Label(10,0,"备注",format1); //将定义好的单元格添加到工作表中 sheet.addCell(labelA); sheet.addCell(labelB); sheet.addCell(labelC); sheet.addCell(labelD); sheet.addCell(labelE); sheet.addCell(labelF); sheet.addCell(labelG); sheet.addCell(labelH); sheet.addCell(labelI); sheet.addCell(labelJ); sheet.addCell(labelK); for (int ii = 0; ii < result.size(); ii++) { SubApplyInfos vo = (SubApplyInfos)result.get(ii); Label labelA1 = new Label(0,ii+1,vo.getApplyType()); Label labelB1 = new Label(1,ii+1,vo.getApplyTitle()); Label labelC1 = new Label(2,ii+1,vo.getApplyName()); Label labelD1 = new Label(3,ii+1,vo.getApplySex()); Label labelE1 = new Label(4,ii+1,vo.getApplyTel()); Label labelF1 = new Label(5,ii+1,vo.getApplyCar()); Label labelG1 = new Label(6,ii+1,vo.getApplyTime()); Label labelH1 = new Label(7,ii+1,vo.getApplyEmail()); Label labelI1 = new Label(8,ii+1,vo.getApplyCity()); SimpleDateFormat f1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Label labelJ1 = null; if(vo.getCreateTime() != null && !"".equals(vo.getCreateTime())){ labelJ1 = new Label(9,ii+1,f1.format(vo.getCreateTime())); }else{ labelJ1 = new Label(9,ii+1,""); } Label labelK1 = new Label(10,ii+1,vo.getApplyRemark()); sheet.addCell(labelA1); sheet.addCell(labelB1); sheet.addCell(labelC1); sheet.addCell(labelD1); sheet.addCell(labelE1); sheet.addCell(labelF1); sheet.addCell(labelG1); sheet.addCell(labelH1); sheet.addCell(labelI1); sheet.addCell(labelJ1); sheet.addCell(labelK1); } //写入数据并关闭文件 book.write(); book.close(); System.out.println("创建文件成功!"); OutputStream outputS = response.getOutputStream(); response.reset(); // response.setContentType("application/octet-stream; charset=GB2312"); response.setContentType("application/vnd.ms-excel; charset=GB2312"); response.setHeader("Content-Disposition", "attachment;filename=\"" + xlsFileName.substring(xlsFileName.lastIndexOf("/") + 1) + "\""); InputStream in = new FileInputStream(new File(xlsFileName)); if (in != null) { byte[] b = new byte[2048]; int len = 0; while ((len = in.read(b)) > 0) { outputS.write(b, 0, len); // outputS.flush(); } outputS.close(); in.close(); } }
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代码中便是导出excel数据的具体操作方法,其原理便是:先将数据存储到临时excel文件中,然后再将该excel文件以文件下载的方式下载到客户端,从而实现了导出excel数据的功能。
注意,这段代码并不是通用,如果有需要实现该功能的朋友,请复制后自行修改,当然,有心的朋友可以将它修改成通用方法,相信也不是件困难的事情。
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