function exportExcel() {
    $.messager
            .confirm(
                    '提示信息',
                    '您确定要导出到Excel?',
                    function(r) {
                        if (r) {
                            var columns = $("#queryTmallTcMsgGrid").datagrid(
                                    "options").columns[0];
                            var stringTitle = "";
                            var stringFields = "";
                            for (var i = 0; i < columns.length; i++) {
                                //导出剔除'联系手机'
                                if (columns[i].title == "联系手机") {
                                    continue;
                                }
                                stringTitle = stringTitle + columns[i].title
                                        + ",";
                                if (columns[i].title == "客户性质") {
                                    stringFields = stringFields
                                            + "customerNatureName,";
                                } else if (columns[i].title == "是否回访") {
                                    stringFields = stringFields
                                            + "isCallbackName,";
                                } else if (columns[i].title == "是否购买") {
                                    stringFields = stringFields + "isBuyName,";
                                } else if (columns[i].title == "留言来源") {
                                    stringFields = stringFields
                                            + "messageSourceName,";
                                } else if (columns[i].title == "客户类型") {
                                    stringFields = stringFields
                                            + "userTypeName,";
                                } else if (columns[i].title == "分配类型") {
                                    stringFields = stringFields
                                            + "distributionTypeName,";
                                } else {
                                    stringFields = stringFields
                                            + columns[i].field + ",";
                                }
                            }
                            var queryParams = $("#queryTmallTcMsgGrid")
                                    .datagrid("options").queryParams;
                            queryParams.gridTitle = stringTitle;
                            queryParams.gridField = stringFields;
                            queryParams.moduleName = "天猫留言.xls";
                            var formObj = $("<form></form>")
                                    .attr("method", "post")
                                    .attr(
                                            "action",
                                            appPath
                                                    + "/page/tmallTcMessageAct/exportExcel");
                            formObj
                                    .append(
                                            "<input type='text' name='gridTitle'>")
                                    .append(
                                            "<input type='text' name='gridField'>")
                                    .append(
                                            "<input type='text' name='moduleName'>")
                                    .append(
                                            "<input type='text' name='tmallOrderId'>")
                                    .append(
                                            "<input type='text' name='memberName'>")
                                    .append(
                                            "<input type='text' name='alipayUserName'>")
                                    .append(
                                            "<input type='text' name='alipayPaidFee'>")
                                    .append(
                                            "<input type='text' name='message'>")
                                    .append(
                                            "<input type='text' name='messageSource'>")
                                    .append(
                                            "<input type='text' name='receiveUser'>")
                                    .append(
                                            "<input type='text' name='receiveFullAddress'>")
                                    .append(
                                            "<input type='text' name='receiveTel'>")
                                    .append(
                                            "<input type='text' name='receiveMobile'>")
                                    .append(
                                            "<input type='text' name='orderCreateTime'>")
                                    .append(
                                            "<input type='text' name='goodsNo'>")
                                    .append(
                                            "<input type='text' name='goodsTopic'>")
                                    .append(
                                            "<input type='text' name='goodsCount'>")
                                    .append(
                                            "<input type='text' name='isCallback'>")
                                    .append("<input type='text' name='isBuy'>")
                                    .append(
                                            "<input type='text' name='notBuyReason'>")
                                    .append(
                                            "<input type='text' name='callbackTime'>")
                                    .append(
                                            "<input type='text' name='commitUserid'>")
                                    .append(
                                            "<input type='text' name='callbackUserid'>")
                                    .append(
                                            "<input type='text' name='userType'>")
                                    .append(
                                            "<input type='text' name='serviceName'>")
                                    .append(
                                            "<input type='text' name='assignNum'>")
                                    .append(
                                            "<input type='text' name='distributionType'>")
                                    .append(
                                            "<input type='text' name='customerNature'>")
                                    .append(
                                            "<input type='text' name='bgMessageTime'>")
                                    .append(
                                            "<input type='text' name='endMessageTime'>")
                                    //8459修正
                                    /*.append(
                                            "<input type='text' name='importId'>")*/
                                    .append(
                                            "<input type='text' name='assignId'>")
                                    .append(
                                            "<input type='text' name = 'note'>")
                                    .append(
                                            "<input type='text' name = 'orderId'>")
                                    .css('display', 'none').appendTo("body");
                            formObj.form("load", queryParams);
                            formObj.submit();
                            formObj.remove();
                        }
                    });
}
@RequestMapping(value = "/exportExcel")
    public String exportExcel(HttpServletRequest request, HttpServletResponse response, TmallTcMessage tmallTcMessage) {

        String objList = "";
//        Integer userId = (Integer) request.getSession().getAttribute("userId");
//        Integer num = systemService.checkName(userId);
        Integer strLength = 4;
//        if (num != null && num > 0) {
//            strLength = 0;
//        }
        tmallTcMessage.setStrLength(strLength);
        try {
            objList = exportService.exportExcelFile(request,
                response,
                tmallTcMessage,
                "TmallTcMessage.TmallMessageExportExcel");
        } catch (Exception e) {
            logger.debug(e.getMessage());
            e.printStackTrace();
        }
        return objList;
    }

=============================================基类==========================================================================

    public String exportExcelFile(HttpServletRequest request,HttpServletResponse response,
            Object obj, String sqlMap) throws Exception {
        String fileChName = request.getParameter("moduleName");
        String gridTitle = request.getParameter("gridTitle");
        String gridField = request.getParameter("gridField");
        response.reset();
        response.setCharacterEncoding("ISO8859-1");
        response.setHeader("Content-Disposition", "attachment; filename="+new String(fileChName.getBytes("GBK"), "ISO8859-1"));//fileChName为下载时用户看到的文件名
        response.setHeader("Connection", "close");
        response.setHeader("Content-Type", "application/octet-stream");
        OutputStream out = response.getOutputStream();

        Map map = new HashMap();
        List<Object> paymentInfoList = commonDao.queryForList(sqlMap, obj);

        if(paymentInfoList.size()>10000){
            WritableWorkbook wbook = Workbook.createWorkbook(out);//直接写入内存,不要存放到硬盘中
            jxl.write.WritableSheet wsheet = wbook.createSheet("Sheet1", 0);//定义sheet的名称
            jxl.write.WritableFont wfont = null; // 字体
            jxl.write.WritableCellFormat wcfFC = null; // 字体格式
            jxl.write.Label wlabelString = null; // Excel表格的Cell,文本格式
            for(int i=0;i<1;i++){
                wsheet.setColumnView(i, 40);//设置列宽
            }
            // 设置excel标题字体
            wfont = new jxl.write.WritableFont(WritableFont.ARIAL, 14, WritableFont.BOLD,
                false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK);
            wcfFC = new jxl.write.WritableCellFormat(wfont);
            wcfFC.setAlignment(jxl.format.Alignment.LEFT); // 设置对齐方式
            // 添加excel标题
            jxl.write.Label wlabel1 = new jxl.write.Label(5, 0,"导出提示",wcfFC);
            wsheet.addCell(wlabel1);
           // 设置正文字体
          wfont = new jxl.write.WritableFont(WritableFont.TIMES, 12, WritableFont.NO_BOLD,
            false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK);
          wcfFC = new jxl.write.WritableCellFormat(wfont);
          wcfFC.setAlignment(jxl.format.Alignment.LEFT); // 设置对齐方式
         //往Excel输出数据
          wlabelString = new jxl.write.Label(5, 1, "导出数据超过一万条,系统不支持,请分批导出",wcfFC);
          wsheet.addCell(wlabelString);
          wbook.write(); // 写入文件
          wbook.close();
          out.flush();
          out.close();
          return "ok";
        }

        String[] title = gridTitle.split(",");
        String[] propery = gridField.split(",");
        Integer titleNum = title.length;//Excel中字段的个数
        String FileTitle = "";//Excel中正文标题

        //--建立EXCEL索引、字段名、字段值的关系,存放到map中
        for(int i=0;i<title.length;i++){
            String PojoPropery =  propery[i];//grid中title和field是一一对应的,所以可以这么写
            String toUpp = PojoPropery.replaceFirst(PojoPropery.substring(0,1), PojoPropery.substring(0,1).toUpperCase());//把首字母转换为大写
            String methodName = "get"+toUpp;//拼成pojo类中getXXX的方法名称
            map.put(PojoPropery, new ExportExcelColumn(i,title[i],methodName));
        }

        this.export(out, FileTitle, titleNum,paymentInfoList, map);
        return "ok";
    }

==========================================================js=======================================================

//导出
function exportExcel(){
    $.messager.confirm('提示信息','您确定要导出到Excel?',function(r){
        if(r){
            var columns = $("#linksCommonGrid").datagrid("options").columns[0];

            //--------把标题grid标题和grid的field,拼接成字符串-----------
            var stringTitle = "";
            var stringFields = "";
            for(var i = 1; i < columns.length; i++){
                stringTitle = stringTitle + columns[i].title + ",";
                stringFields = stringFields + columns[i].field + ",";
            }
            if(stringTitle.lastIndexOf(",") == (stringTitle.length-1)){
                stringTitle = stringTitle.substring(0, stringTitle.lastIndexOf(","));
            }
            if(stringFields.lastIndexOf(",") == (stringFields.length-1)){
                stringFields = stringFields.substring(0, stringFields.lastIndexOf(","));
            }

            var queryParams = $("#linksCommonGrid").datagrid("options").queryParams;
            queryParams.gridTitle = stringTitle;
            queryParams.gridField = stringFields;
            queryParams.moduleName = "友情链接.xls";

            var formObj = $("<form></form>").attr("method","post").attr("action",appPath+"/page/pageIndexMrgAct/exportLinksList");
            formObj.append("<input type='text' name='gridTitle'>")
                   .append("<input type='text' name='gridField'>")
                   .append("<input type='text' name='moduleName'>")
                    .append("<input type='text' name='linkType'>")
                   .append("<input type='text' name='url'>")
                   .append("<input type='text' name='keywords1'>")
                   .append("<input type='text' name='linkUrl1'>")
                   .append("<input type='text' name='qq'>")
                   .append("<input type='text' name='keywords2'>")
                   .append("<input type='text' name='linkUrl2'>")
                   .css('display','none')
                   .appendTo("body");
            formObj.form("load",queryParams);
            formObj.submit();
            formObj.remove();
        }
    });
}

=====================================================java=======================================================

 /**
             * 导出excel
             *
             * @param request
             * @param response
             * @param website
             */
            @RequestMapping(value = "/exportLinksList")
            @ResponseBody
            public String exportLinksList(HttpServletRequest request,
                    HttpServletResponse response, PageIndexLinks pageIndexLinks) {
            try {
                    List<Object> LinksList=null;
                    ServiceMessage<List<Object>> res = pageIndexLinksService.getLinksListForExport(pageIndexLinks);
                    if(res.getStatus().getCode().equals("0")){
                    LinksList=res.getResult();
                        if(LinksList!=null && LinksList.size()>0){
                             Map<String,String> paramMap=new HashMap<String,String>();
                            String fileChName = request.getParameter("moduleName");
                            String gridTitle = request.getParameter("gridTitle");
                        String gridField = request.getParameter("gridField");
                            paramMap.put("moduleName", fileChName);
                            paramMap.put("gridTitle", gridTitle);
                            paramMap.put("gridField", gridField);
                        return     exportService.exportExcelFileSEO(response, paramMap, LinksList);
                        }
                    }
                } catch (Exception e) {
                e.printStackTrace();
                }
            return null;

            }

=========================基类===========================

/**
     * SEO daochu Excel
     */

    public String exportExcelFileSEO(HttpServletResponse response, Map<String,String> paramMap, List<Object> objList)throws Exception {
        String fileChName = paramMap.get("moduleName");
        String gridTitle = paramMap.get("gridTitle");
        String gridField = paramMap.get("gridField");
        response.reset();
        response.setCharacterEncoding("ISO8859-1");
        response.setHeader("Content-Disposition", "attachment; filename="+new String(fileChName.getBytes("GBK"), "ISO8859-1"));//fileChName为下载时用户看到的文件名
        response.setHeader("Connection", "close");
        response.setHeader("Content-Type", "application/octet-stream");
        OutputStream out = response.getOutputStream();
        Map map = new HashMap();

        if(objList.size()>10000){
            WritableWorkbook wbook = Workbook.createWorkbook(out);//直接写入内存,不要存放到硬盘中
            jxl.write.WritableSheet wsheet = wbook.createSheet("Sheet1", 0);//定义sheet的名称
            jxl.write.WritableFont wfont = null; // 字体
            jxl.write.WritableCellFormat wcfFC = null; // 字体格式
            jxl.write.Label wlabelString = null; // Excel表格的Cell,文本格式
            for(int i=0;i<1;i++){
                wsheet.setColumnView(i, 40);//设置列宽
            }
            // 设置excel标题字体
            wfont = new jxl.write.WritableFont(WritableFont.ARIAL, 14, WritableFont.BOLD,
                false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK);
            wcfFC = new jxl.write.WritableCellFormat(wfont);
            wcfFC.setAlignment(jxl.format.Alignment.LEFT); // 设置对齐方式
            // 添加excel标题
            jxl.write.Label wlabel1 = new jxl.write.Label(5, 0,"导出提示",wcfFC);
            wsheet.addCell(wlabel1);
           // 设置正文字体
          wfont = new jxl.write.WritableFont(WritableFont.TIMES, 12, WritableFont.NO_BOLD,
            false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK);
          wcfFC = new jxl.write.WritableCellFormat(wfont);
          wcfFC.setAlignment(jxl.format.Alignment.LEFT); // 设置对齐方式
         //往Excel输出数据
          wlabelString = new jxl.write.Label(5, 1, "导出数据超过一万条,系统不支持,请分批导出",wcfFC);
          wsheet.addCell(wlabelString);
          wbook.write(); // 写入文件
          wbook.close();
          out.flush();
          out.close();
          return "ok";
        }

        String[] title = gridTitle.split(",");
        String[] propery = gridField.split(",");
        Integer titleNum = title.length;//Excel中字段的个数
        String FileTitle = "";//Excel中正文标题
        //--建立EXCEL索引、字段名、字段值的关系,存放到map中
        for(int i=0;i<title.length;i++){
            String PojoPropery =  propery[i];//grid中title和field是一一对应的,所以可以这么写
            String toUpp = PojoPropery.replaceFirst(PojoPropery.substring(0,1), PojoPropery.substring(0,1).toUpperCase());//把首字母转换为大写
            String methodName = "get"+toUpp;//拼成pojo类中getXXX的方法名称
            map.put(PojoPropery, new ExportExcelColumn(i,title[i],methodName));
        }

        this.export(out, FileTitle, titleNum,objList, map);
        return "ok";
    }

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