导入excel

JAVA 通常有两种方法来操作Excel，分别是开源的POI和JExcelAPI。
POI是Apace公司，对中文支持较弱；
JExcelAPI是韩国公司，中文支持好，纯JAVA编写，可跨平台。不依赖Windows系统，在Linux下同样能够正确的处理Excel文件。 对图形和图表的支持很有限，仅识别PNG格式。
本例使用POI

实现的功能：插入

JSP页面：

    <script type="text/javascript" src="js/plugins/swfupload/swfupload.js"></script>
    <script type="text/javascript"
        src="js/plugins/swfupload/js/handlers.js"></script>
    <script type="text/javascript"
        src="js/plugins/swfupload/js/swfupload.queue.js"></script>
    <script type="text/javascript"
        src="js/plugins/swfupload/js/fileprogress.js"></script>
    <script type="text/javascript"
        src="js/plugins/swfupload/js/swfupload.swfobject.js"></script>
<script type="text/javascript">
        var swfu;
        function wload() {
            var settings = {
                flash_url : "js/plugins/swfupload/swfupload.swf",
                upload_url : "taoke/uploadExcel",
                post_params : {
                //"user" : "1"
                },
                file_post_name : "file",
                file_size_limit : "2048 MB",
                file_types : "*.*",
                file_types_description : "All Files",
                file_upload_limit : 100,
                file_queue_limit : 0,
                custom_settings : {
                    progressTarget : "fsUploadProgress",
                    cancelButtonId : "btnCancel"
                },
                debug : false,
                // Button settings
                button_image_url : "../images/daoru.png",
                button_width : "56",
                button_height : "35",
                button_placeholder_id : "spanButtonPlaceHolder",
                //button_text: '<span class="theFont" >上传文件</span>',
                button_text_style : ".theFont { font-size: 14; }",
                button_text_left_padding : 12,
                button_text_top_padding : 3,

                // The event handler functions are defined in handlers.js
                file_queued_handler : fileQueued,
                file_queue_error_handler : fileQueueError,
                file_dialog_complete_handler : fileDialogComplete,
                upload_start_handler : uploadStart,
                upload_progress_handler : uploadProgress,
                upload_error_handler : uploadError,
                upload_success_handler : uploadExcelSuccess,
                upload_complete_handler : uploadComplete,
                queue_complete_handler : queueComplete
            // Queue plugin event
            };
            swfu = new SWFUpload(settings);
        };
        var wlds = window.onload;
        window.onload = function() {
            if (wlds != undefined) {
                wlds();
            }
            wload();
        };
    </script>

    <div style="display: none;">
        <div class="fieldset flash" id="fsUploadProgress">
            <span class="legend">Upload Queue</span>
        </div>
        <input id="btnCancel" type="button" value="Cancel All Uploads"
            onclick="swfu.cancelQueue();" disabled="disabled"
            style="margin-left: 2px; font-size: 8pt; height: 29px;" />
    </div>

JS页面：

var wld=window.onload;
window.onload=function(){
    if(wld!=undefined){
        wld();
    }
    appLoad.init();
};


function uploadExcelSuccess(file, response) {
    try {
        var dt=JSON.parse(response);
        alert('导入成功');
    } catch (ex) {
        alert(ex)
    }
}

java代码：

package com.entrym.web.action;

import java.io.File;
import java.io.FileInputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.struts2.json.JSONUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.admin.commons.BaseAction;
import com.admin.commons.Page;
import com.entrym.domain.TaokeDetail;
import com.entrym.service.TaokeDetailService;

@Scope("prototype")
@Controller("taokeDetailAction")
public class TaokeDetailAction extends BaseAction {

    Logger log = Logger.getLogger("");
    private static final long serialVersionUID = 1L;

    public String taokeDetail() {
        return "taokeDetail";
    }

    @Autowired
    private TaokeDetailService taokeDetailService;


    @SuppressWarnings("unused")
    public void uploadExcel() {
        if (file != null) {
            try {
                Workbook workbook = load(file);
                TaokeDetail taokeDetail = new TaokeDetail();
                for (Sheet sheet : workbook) {// 拿到每个sheet
                    Row firstRow = sheet.getRow(0);// 获取第一行
                    List<String> firstLine = new ArrayList<String>();
                    for (Cell cell : firstRow) {// 遍历第一行的每一个单元格
                        if (cell != null) {
                            firstLine.add(cell.toString());
                        }
                    }
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    for (int s = 1; s <= sheet.getLastRowNum(); s++) {// 从第二行开始遍历，存入数据库
                        HashMap<String, Object> lhhead = new HashMap<>();
                        for (int i = 0; i < firstRow.getLastCellNum(); i++) {// row.getLastCellNum()获取行的列数
                            try {
                                Cell cell = sheet.getRow(s).getCell(i);// 获取每一行某列单元格
                                String value = null;
                                String header = firstLine.get(i);
                                String cre = "创建时间";
                                if (cell != null) {
                                    cell.setCellType(Cell.CELL_TYPE_STRING);
                                    switch (header) {
                                    case "创建时间":
                                        taokeDetail.setCreatdate(sdf.parse(cell.getStringCellValue()));
                                        break;
                                    case "点击时间":
                                        taokeDetail.setHittime(sdf.parse(cell.getStringCellValue()));
                                        break;
                                    case "结算时间":
                                        taokeDetail.setSettlementtime(sdf.parse(cell.getStringCellValue()));
                                        break;
                                    case "商品信息":
                                        taokeDetail.setGoodsinfo(cell.getStringCellValue());
                                        break;
                                    case "掌柜旺旺":
                                        taokeDetail.setAlitrademanager(cell.getStringCellValue());
                                        break;
                                    case "所属店铺":
                                        taokeDetail.setShop(cell.getStringCellValue());
                                        break;
                                    case "订单状态":
                                        taokeDetail.setOrderstate(cell.getStringCellValue());
                                        break;
                                    case "订单类型":
                                        taokeDetail.setOrdertype(cell.getStringCellValue());
                                        break;
                                    case "补贴类型":
                                        taokeDetail.setSubsidytype(cell.getStringCellValue());
                                        break;
                                    case "成交平台":
                                        taokeDetail.setTransactionplatform(cell.getStringCellValue());
                                        break;
                                    case "第三方服务来源":
                                        taokeDetail.setSourceservise(cell.getStringCellValue());
                                        break;
                                    case "类目名称":
                                        taokeDetail.setTypename(cell.getStringCellValue());
                                        break;
                                    case "来源媒体名称":
                                        taokeDetail.setSourcemedianame(cell.getStringCellValue());
                                        break;
                                    case "广告位名称":
                                        taokeDetail.setAdvertisingspacename(cell.getStringCellValue());
                                        break;
                                    case "商品ID":
                                        taokeDetail.setGoodsid(Long.parseLong(cell.getStringCellValue()));
                                        break;
                                    case "订单编号":
                                        taokeDetail.setOrdernumber(Long.parseLong(cell.getStringCellValue()));
                                        break;
                                    case "来源媒体ID":
                                        taokeDetail.setSourcemediaid(Long.parseLong(cell.getStringCellValue()));
                                        break;
                                    case "广告位ID":
                                        taokeDetail.setAdvertisingspaceid(Long.parseLong(cell.getStringCellValue()));
                                        break;
                                    case "商品数":
                                        taokeDetail.setGoodscount(Integer.parseInt(cell.getStringCellValue()));
                                        break;
                                    case "商品单价":
                                        taokeDetail.setUnitprice(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "收入比率":
                                        value = cell.getStringCellValue();
                                        taokeDetail.setEarningratio(Double.parseDouble(value.substring(0, value.length() - 1)));
                                        break;
                                    case "分成比率":
                                        value = cell.getStringCellValue();
                                        taokeDetail.setProrataratio(Double.parseDouble(value.substring(0, value.length() - 1)));
                                        break;
                                    case "付款金额":
                                        taokeDetail.setPaymoney(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "效果预估":
                                        taokeDetail.setEffectestimates(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "结算金额":
                                        taokeDetail.setSettlementamount(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "预估收入":
                                        taokeDetail.setEstimaterevenue(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "佣金比率":
                                        value = cell.getStringCellValue();
                                        taokeDetail.setCommissionrate(Double.parseDouble(value.substring(0, value.length() - 1)));
                                        break;
                                    case "佣金金额":
                                        taokeDetail.setCommission(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    case "补贴比率":
                                        value = cell.getStringCellValue();
                                        taokeDetail.setSubsidyratio(Double.parseDouble(value.substring(0, value.length() - 1)));
                                        break;
                                    case "补贴金额":
                                        taokeDetail.setSubsidycalculation(Double.parseDouble(cell.getStringCellValue()));
                                        break;
                                    default:
                                        break;
                                    }
                                }
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        }
                        taokeDetailService.insertSelective(taokeDetail);
                    }
                }
                write("{"success":true}");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    private static Workbook load(File file) throws Exception {// 读取
        Workbook workbook = null;
        try {
            workbook = new HSSFWorkbook(new FileInputStream(file));
        } catch (Exception e) {
            if (e instanceof OfficeXmlFileException) {
                try {
                    workbook = new XSSFWorkbook(new FileInputStream(file));
                } catch (Exception ex) {
                    workbook = null;
                    throw ex;
                }
            } else {
                throw e;
            }
        }
        return workbook;
    }

    private File file;

    public File getFile() {
        return file;
    }

    public void setFile(File file) {
        this.file = file;
    }
}

解决办法：先设置Cell的类型，然后就可以把纯数字作为String类型读进来了：

 cell.setCellType(Cell.CELL_TYPE_STRING);

其他：

cell.setCellType(Cell.CELL_TYPE_NUMERIC);
cell.setCellType(Cell.CELL_TYPE_BOOLEAN);
cell.setCellType(Cell.CELL_TYPE_FORMULA);
cell.setCellType(Cell.CELL_TYPE_BLANK);
cell.setCellType(Cell.CELL_TYPE_ERROR);