Java中用POI实现将数据导出到Excel
一、前言
数据导出为Excel在我们写项目的过程中经常用到
需要用到的jar包 poi-3.17.jar
二、具体实现步骤
//第一步创建一个webbook,对应一个Excel文件 HSSFWorkbook wb=new HSSFWorkbook(); //第二步,在webbook中添加一个sheet,对应Excel文件中的sheet HSSFSheet sheet=wb.createSheet("食物信息数据"); //第三步,在sheet中添加表头第0行 HSSFRow row = sheet.createRow(0); //第四步,创建单元格,并设置表头居中 HSSFCellStyle style = wb.createCellStyle(); style.setAlignment(HorizontalAlignment.CENTER);//居中格式 HSSFCell cell = row.createCell(0); cell.setCellValue("编号"); cell.setCellStyle(style); cell=row.createCell((short)1); cell.setCellValue("名称"); cell.setCellStyle(style); cell=row.createCell((short)2); cell.setCellValue("类型"); cell.setCellStyle(style); cell=row.createCell((short)3); cell.setCellValue("单价"); cell.setCellStyle(style); cell=row.createCell((short)4); cell.setCellValue("库存"); cell.setCellStyle(style); //第五步,写入实体数据,从数据库拿数据 FoodController controller=new FoodController(); List<Foods> foodsList = controller.foodsList(null, null); for (int i = 0; i < foodsList.size(); i++) { //创建单元格,并赋值 row=sheet.createRow(i+1); Foods foods = foodsList.get(i); row.createCell((short)0).setCellValue(foods.getId()); row.createCell((short)1).setCellValue(foods.getName()); row.createCell((short)2).setCellValue(foods.getType()); row.createCell((short)3).setCellValue(foods.getPrice()); row.createCell((short)4).setCellValue(foods.getNum()); } //第六步,下载Excel OutputStream out=null; out=response.getOutputStream(); String fileName="食物信息.xls"; response.setContentType("application/x-=msdownload"); response.setHeader("Content-Disposition", "attachment; filename=" +URLEncoder.encode(fileName, "UTF-8")); wb.write(out);
三、实现效果图
导出成功后数据成功显示
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