描述 ：我们现在有很多数据，分表存放，现在需要有精度条的导出。最后面有完整代码。
效果图：
点击导出，实现
点击导出
统计完成之后
点击确定
前面导出操作简单，从第二个导出操作开始：
点击"确定"调用exportCsv函数
<a class="on" href="javascript:exportCsv();"><em>导出</em></a>
exportCvs函数如下
function exportCsv(){//清除等待的转动圈
$('#loading').html('');//弹出统计总数对话框，函数在后面给出定义
tip();//ajax请求总数
$.post("<?php echo WEB_URL;?>/index.php?q=onlinesea/getwherecount"+search_uri, function(json){ var return_arr = eval('(' + json + ')'); var num = return_arr['total']; var processnum = return_arr['processnum']; if(num == 0){ poptip.title('系统消息'); poptip.content('查询结果为空，不能进行数据导出'); } else { poptip.close(); for (var i in return_arr['cntarr']){ if (return_arr['cntarr'][i] != 0){ count_arr[i] = return_arr['cntarr'][i]; } } var ii=0; for (var i in count_arr){ type_arr[ii]=i; ii++; }//当数据不为空的时候弹出是否到处框
exportCsvConfirm(num, processnum); } });}
//弹出确认下载 exportCsvConfirm函数
function exportCsvConfirm(num, processnum)
{ var msg = '需要导出的数据有 <span style="color: red">' + num + '</span> 行，可能会占用您较多时间来进行导出。<br />您还需要继续吗？';// 提示是否继续
$.dialog.confirm(msg, function () { $('#loading').html(''); processed_count = 0; index = 1; win.$('#process_bg').hide().width('0%').show(); win.$('#process_num').html('0'); $.dialog.through({ title: '数据导出进度', content: win.document.getElementById('processbar'), lock: true, opacity: '.1' }, function(){ window.location.reload(); }); //当继续的时候 win.$('#progress_info').show().text('正在导出数据，请耐心等待，请勿关闭窗口...'); //开始执行导出操作 excel_export2(num, processnum); });}关键函数excel_export2队列请求，首先会在前面定义全局变量
var search_uri = "<?php echo $uri;?>";var event = "<?php echo $event;?>";var processed_count = 0; // 已处理的数据条数var index = 1;var iii = 0;var ajaxmark = 1;var win = $.dialog.parent; // 顶层页面window对象var count_arr = new Array(<?php echo count($this->tables);?>);var type_arr = new Array();我们要定义全局变量 index 和iii ，ajaxmark ,index主要用于对一个表数据太多的时候进行分批导出 ，iii用来控制队列循环，ajaxmark用来判断前一个请求是否执行成功了，成功的话在执行下面的请求
function excel_export2(num, processnum){
//获取tabletype tabletype=type_arr[iii];//获取总数
num = count_arr[tabletype];//判断是否数组是否执行完毕
if(typeof(tabletype)=='undefined'&&typeof(num)=='undefined'){ return false; }//判断是否有上一个ajax请求是否完成
if(ajaxmark==1){ index = 1; //将ajax请求标记为未执行完成ajaxmark=2;
//执行ajax请求，函数在后面给出
retrun_var = excel_export_ajax(index, num, processnum, tabletype); //判断函数返回 if(typeof(retrun_var)=='undefined'){//将iii自增，执行下一个数组数据
iii++;//递归调用自己
excel_export2(num, processnum); if(iii>100){ return false; }//当ajax返回成功的时候，返回。
}else if(retrun_var=='success'){ return false; } return false; }else{ //setTimeout(excel_export2(num, processnum),3000); //setInterval(_excel_export2(num, processnum),3000);//每隔3秒检查是否ajax请求结束，这里settimeout 不能传递参数，只能通过_excel_export2这种形式
setTimeout(_excel_export2(num, processnum),3000); }}function _excel_export2(num, processnum){
return function(){ excel_export2(num, processnum); }}
//excel_export_ajax函数 执行导出
/* AJAX，递归调用 */function excel_export_ajax(index, num, processnum, tabletype){ $.ajax({ url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/exportcsv"+search_uri+"/index/"+index+ "/total/" + num + '/tabletype/' + tabletype, type: 'GET', success: function(data) {//执行次数自增
++processed_count;//当一个表数据太多，分批导出
++index; // 更新进度条 //判断进度 var process_num = parseInt((processed_count / processnum) * 100); if (process_num >= 100) { process_num = 100; }//跟新进度条
update_process(process_num); //alert(processed_count+'--'+processnum);//当执行结束
if (processed_count >= processnum) {//压缩文件
backup_compress(); return 'success'; } if (data == '0'){//将ajax请求标记为执行完毕，执行下一个url请求
ajaxmark=1; return false; } 当一个表的数据未导出完成的时候，会循环调用自己去请求， php函数或判断是否到处完成，导出完成返回0 ，未完成返回1 excel_export_ajax(index, num, processnum, tabletype); } });}/* 备份文件执行压缩 */
function backup_compress(){ win.$('#progress_info').text('正在生成压缩文件...'); $.ajax({ url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/compress/event/<?php echo $event;?>", success: function(msg){ win.$('#process_bg').show().width('100%'); win.$('#process_num').html('100'); win.$('#progress_info').html('导出数据完成。 <a href="' + msg + '" style="color: #006699; text-decoration: underline">下载文件</a>'); } });}
/* 更新进度条 */
function update_process(process_num){ win.$('#process_bg').show().width(process_num + '%'); win.$('#process_num').html(process_num);}
完整代码如下
<script type="text/javascript" language="javascript">
var search_uri = "<?php echo $uri;?>";var event = "<?php echo $event;?>";var processed_count = 0; // 已处理的数据条数var index = 1;var iii = 0;var ajaxmark = 1;var win = $.dialog.parent; // 顶层页面window对象var count_arr = new Array(<?php echo count($this->tables);?>);var type_arr = new Array();function exportCsv(){ $('#loading').html(''); tip(); $.post("<?php echo WEB_URL;?>/index.php?q=onlinesea/getwherecount"+search_uri, function(json){ var return_arr = eval('(' + json + ')'); var num = return_arr['total']; var processnum = return_arr['processnum']; if(num == 0){ poptip.title('系统消息'); poptip.content('查询结果为空，不能进行数据导出'); } else { poptip.close(); for (var i in return_arr['cntarr']){ if (return_arr['cntarr'][i] != 0){ count_arr[i] = return_arr['cntarr'][i]; } } var ii=0; for (var i in count_arr){ type_arr[ii]=i; ii++; } exportCsvConfirm(num, processnum); } });}function exportCsvConfirm(num, processnum){ var msg = '需要导出的数据有 <span style="color: red">' + num + '</span> 行，可能会占用您较多时间来进行导出。<br />您还需要继续吗？'; $.dialog.confirm(msg, function () { $('#loading').html(''); processed_count = 0; index = 1; win.$('#process_bg').hide().width('0%').show(); win.$('#process_num').html('0'); $.dialog.through({ title: '数据导出进度', content: win.document.getElementById('processbar'), lock: true, opacity: '.1' }, function(){ window.location.reload(); }); win.$('#progress_info').show().text('正在导出数据，请耐心等待，请勿关闭窗口...'); excel_export2(num, processnum); });}function excel_export2(num, processnum){ tabletype=type_arr[iii]; num = count_arr[tabletype]; if(typeof(tabletype)=='undefined'&&typeof(num)=='undefined'){ return false; } if(ajaxmark==1){ index = 1; ajaxmark=2; retrun_var = excel_export_ajax(index, num, processnum, tabletype); if(typeof(retrun_var)=='undefined'){ iii++; excel_export2(num, processnum); if(iii>100){ return false; } }else if(retrun_var=='success'){ return false; } return false; }else{ //setTimeout(excel_export2(num, processnum),3000); //setInterval(_excel_export2(num, processnum),3000); setTimeout(_excel_export2(num, processnum),3000); }}function _excel_export2(num, processnum){ return function(){ excel_export2(num, processnum); }}/* 执行导出 */function excel_export(num, processnum){ var retrun_var = 'ss'; for (var i in count_arr){ num = count_arr[i]; tabletype = i; index = 1; retrun_var = excel_export_ajax(index, num, processnum, tabletype); if(typeof(retrun_var)=='undefined'){ //alert('xxxx'); setTimeout(function(){exit;},5000); } if (retrun_var == 'success') { return false; } } return false;}/* AJAX，递归调用 */function excel_export_ajax(index, num, processnum, tabletype){ $.ajax({ url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/exportcsv"+search_uri+"/index/"+index+ "/total/" + num + '/tabletype/' + tabletype, type: 'GET', success: function(data) { ++processed_count; ++index; // 更新进度条 var process_num = parseInt((processed_count / processnum) * 100); if (process_num >= 100) { process_num = 100; } update_process(process_num); //alert(processed_count+'--'+processnum); if (processed_count >= processnum) { backup_compress(); return 'success'; } if (data == '0'){ ajaxmark=1; return false; } excel_export_ajax(index, num, processnum, tabletype); } });}/* 更新进度条 */function update_process(process_num){ win.$('#process_bg').show().width(process_num + '%'); win.$('#process_num').html(process_num);}/* 备份文件执行压缩 */function backup_compress(){ win.$('#progress_info').text('正在生成压缩文件...'); $.ajax({ url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/compress/event/<?php echo $event;?>", success: function(msg){ win.$('#process_bg').show().width('100%'); win.$('#process_num').html('100'); win.$('#progress_info').html('导出数据完成。 <a href="' + msg + '" style="color: #006699; text-decoration: underline">下载文件</a>'); } });}function tip(){ poptip = $.dialog.through({ id: 'tip', title: '系统消息', content: '正在统计总数，请勿关闭窗口 <img src="http://images.cnblogs.com/loading_s.gif" />', width: 300, height: 100, icon: 'system', lock: true, opacity: .1 }, function(){ window.location.reload(); }); poptip.show();}function packetDelete(url,msg){ $.dialog.confirm(msg, function () { $.post(url, function(data){ if(data == '1'){ $.dialog('删除成功', function(){window.location.reload();}); } else if(data == '2'){ $.dialog('删除失败', function(){window.location.reload();}); } else if(data == '3'){ $.dialog('文件不存在，或者已删除', function(){window.location.reload();}); } }); });}</script>