文件上传excel文件

一、读取excel文件

    /**
     * 读取excel
     * @param file
     * @return
     * @throws IOException
     */
    public static List<List<Object>> readExcel(MultipartFile file) throws IOException {
        String extension = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1).toLowerCase();

        if ("xls".equals(extension)) {
            return read2003Excel(file.getInputStream());
        } else if ("xlsx".equals(extension)) {
            return read2007Excel(file.getInputStream());
        } else {
            throw new IOException("不支持的文件类型");
        }
    }

    /**
     * 读取 office 2003 excel
     * @param stream
     * @return
     * @throws IOException
     */
    private static List<List<Object>> read2003Excel(InputStream stream) throws IOException {
        List<List<Object>> list = new LinkedList<List<Object>>();
        HSSFWorkbook hwb = new HSSFWorkbook(stream);
        HSSFSheet sheet = hwb.getSheetAt(0);
        Object value = null;
        HSSFRow row = null;
        HSSFCell cell = null;
        DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");// 格式化日期字符串
        DecimalFormat nf = new DecimalFormat("###.####");// 格式化数字
        //第一行是标题，第二行是列名称，从第三行开始读
        for (int i = sheet.getFirstRowNum() + 2; i <= sheet.getPhysicalNumberOfRows(); i++) {
            row = sheet.getRow(i);
            if (row == null) {
                continue;
            }
            //检查每行的空格数，如果小于最后一列数证明有一个或多个空格，但不是整行
            if(CheckRowNull(row) < row.getLastCellNum()){
                List<Object> linked = new LinkedList<Object>();
                for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
                    cell = row.getCell(j);
                    if (cell == null) {
                        linked.add("");
                        continue;
                    }
                    switch (cell.getCellType()) {
                        case XSSFCell.CELL_TYPE_STRING:
                            value = cell.getStringCellValue();
                            break;
                        case XSSFCell.CELL_TYPE_NUMERIC:
                            if ("@".equals(cell.getCellStyle().getDataFormatString())) {
                                value = df.format(cell.getNumericCellValue());
                            } else if ("General".equals(cell.getCellStyle().getDataFormatString())) {
                                value = nf.format(cell.getNumericCellValue());
                            } else {
                                value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
                            }
                            break;
                        case XSSFCell.CELL_TYPE_BOOLEAN:
                            value = cell.getBooleanCellValue();
                            break;
                        case XSSFCell.CELL_TYPE_BLANK:
                            value = "";
                            break;
                        default:
                            value = cell.toString();
                    }
                    if (value == null || "".equals(value)) {
                        linked.add("");
                        continue;
                    }
                    linked.add(value);
                }
                list.add(linked);
            }
        }
        return list;
    }

    /**
     * 读取Office 2007 excel
     * @param stream
     * @return
     * @throws IOException
     */
    private static List<List<Object>> read2007Excel(InputStream stream) throws IOException {
        List<List<Object>> list = new LinkedList<List<Object>>();
        // 构造 XSSFWorkbook 对象，strPath 传入文件路径
        XSSFWorkbook xwb = new XSSFWorkbook(stream);
        // 读取第一章表格内容
        XSSFSheet sheet = xwb.getSheetAt(0);
        Object value = null;
        XSSFRow row = null;
        XSSFCell cell = null;
        DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");// 格式化日期字符串
        DecimalFormat nf = new DecimalFormat("###.####");// 格式化数字
        // 第一行是标题，第二行是列名称，从第三行开始读
        for (int i = sheet.getFirstRowNum() + 2; i <= sheet.getPhysicalNumberOfRows(); i++) {
            row = sheet.getRow(i);
            if (row == null) {
                continue;
            }
            if(CheckXSSFRowNull(row) < row.getLastCellNum()){
                List<Object> linked = new LinkedList<Object>();
                for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
                    cell = row.getCell(j);
                    if (cell == null) {
                        linked.add("");
                        continue;
                    }
                    switch (cell.getCellType()) {
                        case XSSFCell.CELL_TYPE_STRING:
                            value = cell.getStringCellValue();
                            break;
                        case XSSFCell.CELL_TYPE_NUMERIC:
                            if ("@".equals(cell.getCellStyle().getDataFormatString())) {
                                value = df.format(cell.getNumericCellValue());
                            } else if ("General".equals(cell.getCellStyle().getDataFormatString())) {
                                value = nf.format(cell.getNumericCellValue());
                            } else {
                                value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
                            }
                            break;
                        case XSSFCell.CELL_TYPE_BOOLEAN:
                            value = cell.getBooleanCellValue();
                            break;
                        case XSSFCell.CELL_TYPE_BLANK:
                            value = "";
                            break;
                        default:
                            value = cell.toString();
                    }
                    if (value == null || "".equals(value)) {
                        linked.add("");
                        continue;
                    }
                    linked.add(value);
                }
                list.add(linked);
            }
        }
        return list;
    }

//判断读取行为空 2003xls
private static int CheckRowNull(HSSFRow row) {
    int num = 0;
    Iterator<HSSFCell> cellItr = row.iterator();
    while (cellItr.hasNext()) {
        HSSFCell c = cellItr.next();
        if (c.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
            num++;
        }
    }
    return num;
}

//判断读取行为空 2007 xlsx
private static int CheckXSSFRowNull(XSSFRow row) {
    int num = 0;
    Iterator<Cell> cellItr =row.iterator();
        while (cellItr.hasNext()) {
            Cell c = cellItr.next();
            if (c.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
                num++;
            }
        }
    return num;
}

List<List<Object>> lists=ImportsExcel.readExcel(file);    String result = "";try {int row = 0;

            Map<String, Object> m = new HashMap<String, Object>();
            // 获取当前时间
            Date date = new Date();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            // 备注
            String remark="";
            for (List<Object> list : lists) {
                if (list != null && list.size() > 0) {
                    // id
                    m.put("id", IDCode.commonId + IDTool.getWebUserId() + "");
　　　　　　　　　　　　// 获取第一列

                    m.put("monitor_date",(String) list.get(0));
                    // 获取第二列
                    String place=(String) list.get(1);
　　　　　　　　　　　　// 转换成数据库值
                    if(place.equals("地点一")){
                        place="0";
                    } else if (place.equals("地点二")) {
                        place="1";
                    } else if (place.equals("地点三")) {
                        place="2";
                    } else if (place.equals("地点四")) {
                        place="3";
                    }
                    m.put("monitor_place",place);
                    //获取第三列
                    m.put("monitor_equipment",(String) list.get(2));
                    // 获取第四列
                    m.put("dust_concentration",(String) list.get(3));
                    // 获取第五列
                    m.put("inspector_name",(String) list.get(4));
　　　　　　　　　　　　// 如果最后一列有值
                    if(list.size() > 5) {
                        remark=(String) list.get(5);
                    }
                    m.put("remark",remark);
                    m.put("create_time", sdf.format(date));
                    m.put("creater_id", createId);
                    // 循环之后需要将对应的值改成初始值
                    remark="";
                }
                row += healthDao.addMonitor(m);
            }
            if (row >= 1) {
                result = RequestResponseTool.getJsonMessage(RespCode.commonSucc, RespMsg.commonSucc);
            }else{
                result = RequestResponseTool.getJsonMessage(RespCode.commonFail, RespMsg.commonFail);
            }
        } catch (Exception e) {
            rollBack(e, log);
            result = RequestResponseTool.getJsonMessage(RespCode.commonFail, RespMsg.commonFail);
        }