通过浏览器响应实现excel导出

导出excel 通过浏览器响应来实现

控制层

 /**
     *预警导出
     */
    @RequestMapping(value = "excelExportWarning")
    public void excelExportfightingWarning(@RequestBody JSONObject json,HttpServletResponse response) throws Exception {
        ResultInfo resultInfo = new ResultInfo();
        try {
            resultInfo = mFireFightingWarningService.excelExportfightingWarning(json,response);
        } catch (Exception e) {
            e.printStackTrace();
            resultInfo.setCode(MsgEnum.FAIL.getCode());
            resultInfo.setMsg(MsgEnum.FAIL.getMsg());
        }
    }

业务层

public ResultInfo excelExportfightingWarning(JSONObject json,HttpServletResponse response) throws Exception {
        //创建了一个excel文件
        HSSFWorkbook workbook = new HSSFWorkbook();
        //创建了一个工作簿
        HSSFSheet sheet = workbook.createSheet("预警信息表");
        //设置要导出的文件的名字
        //excel文件名
        String fileName = "消防预警信息表"+System.currentTimeMillis()+".xls";
        // 如果文件名有中文，必须URL编码
        fileName = URLEncoder.encode(fileName, "UTF-8");
        //新增数据行，并且设置单元格数据
        int rowNum = 1;
        String[] headers = {"预警时间","单位","州市","区县","预警种类","级别","状态"};
        //headers表示excel表中第一行的表头
        HSSFRow row = sheet.createRow(0);
        HSSFCellStyle style = workbook.createCellStyle();
        style.setAlignment(HorizontalAlignment.CENTER);
        HSSFFont font = workbook.createFont();
        font.setFontName("黑体");
        font.setFontHeightInPoints((short) 12);//设置字体大小
        style.setFont(font);
        style.setFillForegroundColor(IndexedColors.CORNFLOWER_BLUE.getIndex());// 设置背景色
        //在excel表中添加表头
        for (int i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
        //日期格式
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        HSSFCellStyle dateCellStyle = workbook.createCellStyle();
        short df = workbook.createDataFormat().getFormat("yyyy-MM-dd HH:mm:ss");
        dateCellStyle.setDataFormat(df);
        //在表中存放查询到的数据放入对应的列
        List list = this.findPage(json);
        for (MFireFightingWarning obj: list) {
            HSSFRow row1 = sheet.createRow(rowNum);
            row1.createCell(0).setCellValue(sdf.format(obj.getWarningTime()));
            row1.createCell(1).setCellValue(obj.getCulturaCompanyName());
            row1.createCell(2).setCellValue(obj.getCityName());
            row1.createCell(3).setCellValue(obj.getDistrictName());
            row1.createCell(4).setCellValue(obj.getWarningSpeciesName());
            row1.createCell(5).setCellValue(obj.getWarningLevelName());
            row1.createCell(6).setCellValue(WarningStatusEnum.getValue(obj.getStatus()));
            rowNum++;
        }
        //设置头信息
        // ContentType 可以不设置
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);
        response.setContentType("application/vnd.ms-excel;charset=UTF-8");
        workbook.write(response.getOutputStream());
        response.getOutputStream().flush();
        response.getOutputStream().close();
        return new ResultInfo();
    }