controller

/*** * @Description (导出申请单)* @author feizhou* @Date 2018年6月21日下午4:33:02  * @version 1.0.0* @param resquest* @param response*/@RequestMapping(value = "/PushLogController/exportDateByModel.do")public void exportDateByModel(HttpServletRequest resquest,HttpServletResponse  response,String[] applicationNOs) {
//      String jsonStr=null;Map<String, Object> paramMap = RequestUtil.getUrlParam(resquest);paramMap.put("applicationNOs", applicationNOs);paramMap.put("startRow",1);try {pushLogService.exportDateByModel(paramMap,resquest,response);} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}}

service

@Overridepublic void exportDateByModel(Map<String, Object> paramMap,HttpServletRequest request,HttpServletResponse response) {String fileName=(String) paramMap.get("fileName");Integer startRow=(Integer) paramMap.get("startRow");//模板路径String modelURL=Constans.applicationModel;List<List<String >>listData=null;listData=bulidListData(paramMap);if(StringUtil.isEmpty(listData)){throw new MyException("所选的申请单没有还款计划");}if(StringUtil.isEmpty(fileName)){fileName="model.xlsx";}ExcelUtil.objListToExcel(listData, response, request, fileName, startRow,modelURL);}

构建数据

    //构建导出需要的数据private List<List<String>> bulidListData(Map<String, Object> paramMap) {// TODO Auto-generated method stubList<List<String>> listData=new ArrayList<List<String>>();//获取数据List<Application> applications = applicationDao.selectList(paramMap);for (Application application : applications) {List<String> data=new ArrayList<String>();data.add(application.getApplicationNO());data.add(application.getCustomerID() );data.add(application.getGys_borrowsq());data.add(application.getUser_phone() );listData.add(data);}return listData;}

导出的核心代码

 /*** @Description (通过excel模板，导出excel数据)* @author feizhou* @Date 2017年12月14日 下午3:00:52* @version 1.0.0* @param listData* @param response* @param fileName*/public static void objListToExcel(List<List<String>> listData, HttpServletResponse response,HttpServletRequest request, String fileName,Integer startRow,String modelURL) {// 获取项目发布的路径String projectPath = request.getSession().getServletContext().getRealPath("");// 模板文件路径String modelPath = projectPath + modelURL;// Excel2007版本的Excel文件需要使用XSSFWorkbook来读取，如下：XSSFWorkbook wb = getWorkBookGivenFileHandle(modelPath);// 获得当前sheet工作表//默认第一个个XSSFSheet sheet = wb.getSheetAt(0);if (StringUtil.isNotEmpty(wb)) {try {XSSFRow row = null;// 设置内容//获取开始行之后的第一行的所有单元格样式row = sheet.getRow(startRow);XSSFCellStyle rowStyle = row.getRowStyle();short height = row.getHeight();
//                boolean zeroHeight = row.getZeroHeight();
//              row.getint m = listData.get(0).size();List<XSSFCellStyle> listCellStyle=new ArrayList<XSSFCellStyle>();for (int j = 0; j < m; j++) {XSSFCell cell = row.getCell(j);XSSFCellStyle cellStyle = cell.getCellStyle();listCellStyle.add(cellStyle);}//加载数据for (int i = 0; i < listData.size(); i++) {List<String> rowValues = listData.get(i);row = sheet.createRow(i + startRow);row.setRowStyle(rowStyle);row.setHeight(height);for (int j = 0; j < rowValues.size(); j++) {XSSFCell cell = row.createCell(j);String value = rowValues.get(j);boolean isNum = StringUtil.isNum(value);if (isNum) {cell.setCellValue(Double.parseDouble(value));cell.setCellStyle(listCellStyle.get(j));} else {cell.setCellValue(value);cell.setCellStyle(listCellStyle.get(j));}}}//对不同的浏览器下载excel的中文乱码处理String filename =StringUtil.doMessyCode(request, fileName);response.setHeader("Content-Disposition", "attachment; filename=" + filename);OutputStream out = response.getOutputStream();
//                response.reset();//清空输出流  wb.write(out);// 写入Fileout.flush();out.close();} catch (Exception e) {e.printStackTrace();}} else {// 直接抛出异常throw new MyException("找不到对应的模板,所以导不出数据");}}