java的excel表格的导出与下载

今天做一个java对excel表格的导出和下载的时候,从网络上搜寻了下载的模板,代码如下:

控制层:

@RequestMapping(value = "excelOut_identifier")
    public void excelOutIdentifier(HttpServletRequest request, HttpServletResponse response, Long id, ActivationCodeSearchForm searchForm, ExhibitorInfoVenueBranchRelEditForm editForm,
                                   HttpSession session) {
        try {
            //获取数据
            List<ActivationCodeDto> list = organizerService.ActivationCodeById(id,searchForm).getRows();

            //excel标题
            String[] title = {"激活码","主办方","创建时间","失效时间"};

            //excel文件名
            String fileName = "激活码信息表"+System.currentTimeMillis()+".xls";

            //sheet名
            String sheetName = "激活码信息表";

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            String [][] content = new String[list.size()][];
            for (int i = 0; i < list.size(); i++) {
                content[i] = new String[list.size();
                ActivationCodeDto obj = list.get(i);
                content[i][0] = obj.getActivationCode();
                content[i][1] = obj.getExhibitorInfoName();
                content[i][2] = sdf.format(obj.getCreateTime());
                content[i][3] = sdf.format(obj.getDisabledTime());
            }
            //创建HSSFWorkbook
            HSSFWorkbook wb = organizerService.excelOutIdentifier(sheetName, title, content, null);
            this.organizerService.setResponseHeader(response, fileName);
            OutputStream os = response.getOutputStream();
            wb.write(os);
            os.flush();
            os.close();
        }catch(IOException e1) {
            e1.printStackTrace();
        }
    }

service层:

public  HSSFWorkbook excelOutIdentifier(String sheetName,String []title,String [][]values, HSSFWorkbook wb){
        // 第一步,创建一个HSSFWorkbook,对应一个Excel文件
        if(wb == null){
            wb = new HSSFWorkbook();
        }

        // 第二步,在workbook中添加一个sheet,对应Excel文件中的sheet
        HSSFSheet sheet = wb.createSheet(sheetName);

        // 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制
        HSSFRow row = sheet.createRow(0);

        // 第四步,创建单元格,并设置值表头 设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式

        //声明列对象
        HSSFCell cell = null;

        //创建标题
        for(int i=0;i<title.length;i++){
            cell = row.createCell(i);
            cell.setCellValue(title[i]);
            cell.setCellStyle(style);
        }

        //创建内容
        for(int i=0;i<values.length;i++){
            row = sheet.createRow(i + 1);
            for(int j=0;j<values[i].length;j++){
                //将内容按顺序赋给对应的列对象
                row.createCell(j).setCellValue(values[i][j]);
            }
        }
        return wb;
    }

    public void setResponseHeader(HttpServletResponse response, String fileName) {
        try {
            try {
                fileName = new String(fileName.getBytes(),"ISO8859-1");
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            response.setContentType("application/octet-stream;charset=ISO8859-1");
            response.setHeader("Content-Disposition", "attachment;filename="+ fileName);
            response.addHeader("Pargam", "no-cache");
            response.addHeader("Cache-Control", "no-cache");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

前端:

<button id="js-export" type="button" class="btn btn-primary">导出Excel</button>

jsp:

$('#js-export').click(function(){
                            window.location.href="${ctxRoot}/admin/organizer/excelOut_identifier.do?id=${id}"
                        });

注意事项:

  一开始我的前端页面时这样写的,是写的一个ajax请求:

  

<a class="btn btn-success es-ajax"
                                   href="${ctxRoot}/admin/organizer/excelOut_identifier.do?id=${id}">导出excel</a>

  在后端程序都实现可以跑的通的情况下,也没有什么日志错误的打印,前端页面并没有弹出下载的页面,然后再网络上搜索了方法,测试了一遍,都是不行,最后再一篇文章中看到了一个答案,说下载的情况下,使用ajax请求时,是不会弹出下载的页面出来的,随即将其修改成window.location.href的请求方式了。果然就解决了这个问题

原文地址:https://www.cnblogs.com/ly-lyq/p/9696002.html