导入excle数据将excle数据插入到数据库

实现功能是，用户可以直接导入对应数据，或者用户下载模板，填写数据，导入模板数据。easyui实现

前台页面

                                    {
                                        text : '日清导入',
                                        iconCls : 'icon-print',
                                        handler : function(){
                                            $('#import').dialog('open');
                                        }

                                    }

        <div id = "import" title="员工信息导入" modal=true draggable=true align="center" class="easyui-dialog" closed=true style="width: 400px">
        <form id="importForm" method="post" enctype="multipart/form-data">
        <table id="importTable" align="center">
        <tr>
        <td align="center" colspan="2">
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;上传：<input id = "myFile" name="myFile" type="file"></input>
        </td>

         </tr>

        <tr>
            <td align ="center" colspan="2"><a id="download" href="<%=basePath %>import_template/template-dayrecruit.xls" class="easyui-linkbutton" >模板下载</a>&nbsp;&nbsp;&nbsp;
                        <a id="upload" class="easyui-linkbutton">上传</a>&nbsp;&nbsp;&nbsp;
                        <a id="importCancel" class="easyui-linkbutton">取消</a>&nbsp;&nbsp;</td>
        </tr>
        </table>
        </form>
        </div>

以上代码加颜色的是特别注意的点。上传文件一定加这些声明，否则不可实现。点击模板下载可以直接在我们根路径下找到模板，并下载。

具体的后台代码是：

@RequestMapping(value = "/imp", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")
public @ResponseBody String imp(@RequestParam MultipartFile myFile,//这里会直接以流文件形式接收上传数据
        HttpServletRequest request, HttpSession session) throws Exception {

    Account account = this.getStaticAccount();
    if (myFile == null || myFile.getSize() == 0) {
        return "未选择任何文件，请选择文件后上传！";
    }
    String fileType = myFile.getOriginalFilename().substring(
            myFile.getOriginalFilename().lastIndexOf("."));
    if (!fileType.equals(".xls") && !fileType.equals(".xlsx")) {
        return "文件格式错误，请上传.xls或.xlsx格式文件！";
    }
    //String path = CommonsMethod.getProjectPath() ;
    String path=request.getSession()
            .getServletContext().getRealPath("/")
            + "/importReserveExcel/";
    String fileattr = CommonsMethod.getNowCorrect2Millisecond()
            + myFile.getOriginalFilename().substring(
                    myFile.getOriginalFilename().lastIndexOf("."));
    final File targetFile = new File(path, fileattr);
    if (!targetFile.exists()) {
        targetFile.mkdirs();
    }
    try {
        myFile.transferTo(targetFile);
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    ArrayList<Object> dataList = new ArrayList<Object>();
    try {
        dataList = dayRecruitService.readExcel(
                targetFile.getAbsolutePath(), 4);
    } catch (Exception e) {
        return e.getMessage();
    }
    try {
        String failImport = dayRecruitService.importDayrecruit(
                dataList, account);
    } catch (RuntimeException e) {
        return e.getMessage();
    } catch (Exception e) {
        return "请仔细核对上传格式（参考备注）";
    }
    return "上传成功";
}

private static final String[] headers = new String[] {"日清日期","备注","面试人数","入职人数","招聘企业"};

readExcel代码：把数据先读到一个dayrecruit模板中 原因是当前读的数据不是直接向数据库中存的数据。

public ArrayList<Object> readExcel(String absolutePath, int i)throws Exception {
        // TODO Auto-generated method stub

        ExcelOperations oper = new ExcelOperations();
        ArrayList<Object> list = oper.readExcel(absolutePath,
                Template_DayRecruit.class, columnHeaders,i );

        return list;
    }

    public static final String[] columnHeaders = { "date",
        "remarks", "viewerNu",
        "entryNu", "customerName"};

正式读取excle数据代码为

public ArrayList<Object> readExcel(String filePath, Class entity,
            String[] columnHeads, int noReadSize) throws Exception {
        ArrayList<Method> list = new ArrayList<Method>();
        ArrayList<Object> objs = new ArrayList<Object>();

        try {
            for (int i = 0; i < columnHeads.length; i++) {
                char f = columnHeads[i].charAt(0);
                if (!Character.isUpperCase(f)) {
                    columnHeads[i] = String.valueOf(Character.toUpperCase(f))
                            + columnHeads[i].substring(1);
                }
                Method methodGet = entity.getMethod("get" + columnHeads[i]);
                Method methodSet = entity.getMethod("set" + columnHeads[i], methodGet.getReturnType());
                list.add(methodSet);
            }
            InputStream inputstream = new FileInputStream(filePath);
            Workbook wb = WorkbookFactory.create(inputstream);
            Sheet sheet1 = wb.getSheetAt(0);
            for (int i = 1; i <= sheet1.getLastRowNum() - noReadSize; i++) {
                try {

                    Object obj = entity.newInstance();
                    Cell cell = null;
                    for (int k = 0; k < list.size(); k ++) {
                        cell = sheet1.getRow(i).getCell(k);
                        if(cell.getCellType() == 0){
                        //判断是否为日期
                        if(HSSFDateUtil.isCellDateFormatted(cell)){
                            SimpleDateFormat sdf = null;
                            if (cell.getCellStyle().getDataFormat() == HSSFDataFormat
                                    .getBuiltinFormat("h:mm")) {
                                sdf = new SimpleDateFormat("HH:mm");
                            } else {// 日期
                                sdf = new SimpleDateFormat("yyyy-MM-dd");
                            }
                            Date date = cell.getDateCellValue();
                            cell.setCellValue(sdf.format(date)); 

                        }else{
                                double value = cell.getNumericCellValue();
                                CellStyle style = cell.getCellStyle();
                                DecimalFormat format = new DecimalFormat();
                                String temp = style.getDataFormatString();
                                // 单元格设置成常规
                                if (temp.equals("General")) {
                                    format.applyPattern("#");
                                }
                                cell.setCellValue(format.format(value)); 

                        }
                        }
                        list.get(k).invoke(obj, cell.toString());
                    }
                    objs.add(obj);
                } catch (Exception e) {
                    e.printStackTrace();
                    throw new Exception("Excel 文件第" + i + "行格式错误");
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        return objs;
    }

然后调用import方法，里面会验证需要验证的数据。如果有一条没有通过验证那么所有的数据将会回滚操作。这主要牵扯到了事务管理。

    public String importDayrecruit(List<Object> dataList, Account user)
            throws Exception {

        String failImport = "";
        if (dataList != null && dataList.size() > 0) {    

            //根据公司user找到对应公司 根据公司找到对应的 招聘企业 根据招聘企业
            Organization org = dayRecruitDAO.findOrganizationById(user.getOrganization().getId());

            List<EnterpriseCustomer> customers = dayRecruitDAO.findAllEnterpriseCustomerByOrg(user.getOrganization().getId());

            for (int i = 0; i < dataList.size(); i++) {
                DayRecruit dayRec = new DayRecruit();
                Template_DayRecruit t_dayRecruit = new Template_DayRecruit();
                t_dayRecruit = (Template_DayRecruit) dataList.get(i);
                dayRec.setWriter(user.getLoginName());
                dayRec.setDatatime(new Date());
                dayRec.setRemarks(t_dayRecruit.getRemarks().trim());
                //dayRec.
                //验证招聘日期
                if(isValidDate(t_dayRecruit.getDate().trim()) && StringUtils.isNotBlank(t_dayRecruit.getDate().trim())){
                     dayRec.setDate(t_dayRecruit.getDate().toString());

                }else throw new RuntimeException("第" + (i + 2)
                        + "行填写招聘日清日期有误，请重新确定");
                //验证填写人
/*                if(StringUtils.isNotBlank(dayRec.getWriter()) && dayRec.getWriter().equals(user.getUserName())){
                    dayRec.setWriter(dayRec.getWriter().trim());
                }
                else{
                    throw new RuntimeException("第" + (i + 2)
                            + "行填写输入人有误，请填写您的登录账号，请重新确定");
                }*/
                //验证面试人数
                if(isNumeric(t_dayRecruit.getViewerNu().trim()) && StringUtils.isNotBlank(t_dayRecruit.getViewerNu().trim())){
                    dayRec.setViewerNu(t_dayRecruit.getViewerNu().trim());
                }
                else throw new RuntimeException("第" + (i + 2)
                        + "行填写面试人数有误，请重新确定");
                //验证入职人数
                if(isNumeric(t_dayRecruit.getEntryNu().trim()) && StringUtils.isNotBlank(t_dayRecruit.getEntryNu().trim())){

                int  re =     Double.valueOf(t_dayRecruit.getEntryNu().trim()).compareTo(Double.valueOf(t_dayRecruit.getViewerNu().trim()));
                  if(re <1){
                    dayRec.setEntryNu(t_dayRecruit.getEntryNu().trim());    }
                  else {
                      throw new RuntimeException("第" + (i + 2)
                                + "行入职人数大于面试人数，请重新确定");
                }
                }
                else throw new RuntimeException("第" + (i + 2)
                        + "行填写入职人数有误，请重新确定");

                //验证招聘企业  从模板中获取招聘企业的名字 查询出 此公司所有的招聘企业 对应的话  取 招聘企业这个对象赋值给dayR

                // 验证所属公司
                if(StringUtils.isNoneBlank(t_dayRecruit.getCustomerName().trim())){
                    boolean isOK = false;
                    if(customers != null && customers.size()>0){
                    for(int j =0;j<customers.size();j++){
                    if(customers.get(j).getEnterpriseName().equals(t_dayRecruit.getCustomerName().trim())){

                        dayRec.setCustomer(customers.get(j));
                        isOK = true;
                        break;//跳出当前循环
                    }

                }

                }
                    if (!isOK) {
                        throw new RuntimeException("第" + (i + 2)
                                + "行招聘企业输入有误，请重新确定");
                    }
                }

                dayRecruitDAO.add(dayRec);
            }
        } else {
            throw new RuntimeException("导入数据为空");
        }
        return failImport;
    }

这样数据就插入到对应数据库。完成导入操作。