Java处理数据导出功能

一：思路

前提：首先要获取要导出的数据列表（一般都是通过请求查询条件从数据库中获取数据）；然后调用封装好的生成Excel文件方法，在业务层中渲染文件中的数据列表。

二：步骤

1.导入使用的 jxl.jar ;

在页面定义“导出”按钮，发送导出功能请求；

在控制层中，获取要导出的数据集，传入文件名，执行生成Excel文件方法；

@RequestMapping("/exportChkinm")
@ResponseBody
public boolean exportChkinm(HttpServletResponse response, HttpServletRequest request, HttpSession session, Chkinm chkinm, String checkOrNot, Page page, Date madedEnd) throws Exception{

//获取数据
List<Chkinm> chkinmList = chkinmService.findAllChkinm(checkOrNot, chkinm, page, madedEnd, session.getAttribute("locale").toString());
//文件名
String fileName = "已审核入库单汇总";
//执行方法
setExpArg(response, request, fileName);
//返回文件
return chkinmService.exportRUChkinm(response.getOutputStream(), chkinmList);
}
//生成Excel文件方法
public void setExpArg(HttpServletResponse response,HttpServletRequest request,String fileName) throws UnsupportedEncodingException {
response.setContentType("application/msexcel; charset=UTF-8");
if (request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0) {
//IE
fileName = URLEncoder.encode(fileName, "UTF-8");
}else{
fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");
}
response.setHeader("Content-disposition", "attachment; filename="+ fileName + ".xls");
}

2.渲染文件数据

在业务层中

public boolean exportRUChkinm(ServletOutputStream outputStream, List<Chkinm> chkinmList) {
//获取工作薄
WritableWorkbook workBook = null;
//设置工作簿样式
WritableFont titleFont = new WritableFont(WritableFont.TIMES, 16, WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE, Colour.BLACK);
WritableCellFormat titleStyle = new WritableCellFormat(titleFont);
try {
titleStyle.setAlignment(Alignment.CENTRE);
workBook = Workbook.createWorkbook(outputStream);
WritableSheet sheet = workBook.createSheet("已审核入库单汇总导出表", 0);
sheet.addCell(new Label(0, 0, "已审核入库单汇总导出表", titleStyle));
sheet.mergeCells(0, 0, 11, 0);
sheet.addCell(new Label(0, 1, "入库单号"));
sheet.addCell(new Label(1, 1, "凭证号"));
sheet.addCell(new Label(2, 1, "单据类型"));
sheet.addCell(new Label(3, 1, "制单日期"));
sheet.addCell(new Label(4, 1, "制单时间"));
sheet.addCell(new Label(5, 1, "入库仓位"));
sheet.addCell(new Label(6, 1, "供应商"));
sheet.addCell(new Label(7, 1, "总金额"));
sheet.addCell(new Label(8, 1, "税前总金额"));
sheet.addCell(new Label(9, 1, "制单人"));
sheet.addCell(new Label(10, 1, "审核人"));
//遍历list填充表格内容
int index = 1;
for(int j=0; j<chkinmList.size(); j++){
if(j == chkinmList.size()){
break;
}
index += 1;
sheet.addCell(new Label(0, index, chkinmList.get(j).getChkinno().toString()));
sheet.addCell(new Label(1, index, chkinmList.get(j).getVouno()));
sheet.addCell(new Label(2, index, chkinmList.get(j).getTyp()));
sheet.addCell(new Label(3, index, new SimpleDateFormat("yyyy-MM-dd").format(chkinmList.get(j).getMaded())));
sheet.addCell(new Label(4, index, chkinmList.get(j).getMadet()));
sheet.addCell(new Label(5, index, String.valueOf(chkinmList.get(j).getPositn().getDes())));
sheet.addCell(new Label(6, index, String.valueOf(chkinmList.get(j).getDeliver().getDes())));
sheet.addCell(new Label(7, index, Float.toString(chkinmList.get(j).getTotalamt())));
sheet.addCell(new Label(8, index, Double.toString(chkinmList.get(j).getNoTaxTotalamt())));
sheet.addCell(new Label(9, index, chkinmList.get(j).getMadeby()));
sheet.addCell(new Label(10, index,chkinmList.get(j).getChecby()));
}
workBook.write();
outputStream.flush();
} catch (WriteException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
if(workBook!=null){
workBook.close();
}
outputStream.close();
} catch (WriteException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return true;
}