探索php+ajax实现带进度条的大数据排队导出思路

探索php+ajax实现带进度条的大数据排队导出思路

废话不多说,先上效果图:

探索php+ajax实现带进度条的大数据排队导出思路

点击导出,实现

探索php+ajax实现带进度条的大数据排队导出思路

点击导出

探索php+ajax实现带进度条的大数据排队导出思路

统计完成之后

探索php+ajax实现带进度条的大数据排队导出思路

点击确定

探索php+ajax实现带进度条的大数据排队导出思路

下面来谈谈实现的思路:

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

代码如下:

<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
    $(&#39;#loading&#39;).html(&#39;&#39;);
 //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(&#39;(&#39; + json + &#39;)&#39;);
        var num = return_arr[&#39;total&#39;];
        var processnum = return_arr[&#39;processnum&#39;];
        if(num == 0){
            poptip.title(&#39;系统消息&#39;);
            poptip.content(&#39;查询结果为空,不能进行数据导出&#39;);
        }
        else
        {
            poptip.close();
            for (var i in return_arr[&#39;cntarr&#39;]){
                if (return_arr[&#39;cntarr&#39;][i] != 0){
                    count_arr[i] = return_arr[&#39;cntarr&#39;][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 = &#39;需要导出的数据有 <span style="color: red">&#39; + num + &#39;</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?&#39;;
   // 提示是否继续
    $.dialog.confirm(msg, function () {
        $(&#39;#loading&#39;).html(&#39;&#39;);
        processed_count = 0;
        index = 1;
        win.$(&#39;#process_bg&#39;).hide().width(&#39;0%&#39;).show();
        win.$(&#39;#process_num&#39;).html(&#39;0&#39;);
        $.dialog.through({
            title: &#39;数据导出进度&#39;,
            content: win.document.getElementById(&#39;processbar&#39;),
            lock: true,
            opacity: &#39;.1&#39;
        },
        function(){
                window.location.reload();
        });
       //当继续的时候
        win.$(&#39;#progress_info&#39;).show().text(&#39;正在导出数据,请耐心等待,请勿关闭窗口...&#39;);
      //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

代码如下:

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

代码如下:

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)==&#39;undefined&#39;&&typeof(num)==&#39;undefined&#39;){
            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)==&#39;undefined&#39;){           
      //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==&#39;success&#39;){
                  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 + &#39;/tabletype/&#39; + tabletype,
        type: &#39;GET&#39;,
        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+&#39;--&#39;+processnum);
    //当执行结束
            if (processed_count >= processnum)
            {
      //压缩文件
                backup_compress();
                return &#39;success&#39;;
            }
            if (data == &#39;0&#39;){
      //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.$(&#39;#progress_info&#39;).text(&#39;正在生成压缩文件...&#39;);
    $.ajax({
        url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/compress/event/<?php echo $event;?>",
        success: function(msg){
            win.$(&#39;#process_bg&#39;).show().width(&#39;100%&#39;);
            win.$(&#39;#process_num&#39;).html(&#39;100&#39;);
            win.$(&#39;#progress_info&#39;).html(&#39;导出数据完成。&nbsp;&nbsp;<a href="&#39; + msg + &#39;" style="color: #006699; text-decoration: underline">下载文件</a>&#39;);
        }
    });
}
/* 更新进度条 */
function update_process(process_num)
{
    win.$(&#39;#process_bg&#39;).show().width(process_num + &#39;%&#39;);
    win.$(&#39;#process_num&#39;).html(process_num);
}

下面附上源码,咳咳相关php程序大家自己脑补下吧

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()
{
    $(&#39;#loading&#39;).html(&#39;&#39;);
    tip();
    $.post("<?php echo WEB_URL;?>/index.php?q=onlinesea/getwherecount"+search_uri, function(json){
        var return_arr = eval(&#39;(&#39; + json + &#39;)&#39;);
        var num = return_arr[&#39;total&#39;];
        var processnum = return_arr[&#39;processnum&#39;];
        if(num == 0){
            poptip.title(&#39;系统消息&#39;);
            poptip.content(&#39;查询结果为空,不能进行数据导出&#39;);
        }
        else
        {
            poptip.close();
            for (var i in return_arr[&#39;cntarr&#39;]){
                if (return_arr[&#39;cntarr&#39;][i] != 0){
                    count_arr[i] = return_arr[&#39;cntarr&#39;][i];
                }
            }
            var ii=0;
            for (var i in count_arr){
                  type_arr[ii]=i;
                  ii++;
            }
            exportCsvConfirm(num, processnum);
        }
    });
}
function exportCsvConfirm(num, processnum)
{
    var msg = &#39;需要导出的数据有 <span style="color: red">&#39; + num + &#39;</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?&#39;;
    $.dialog.confirm(msg, function () {
        $(&#39;#loading&#39;).html(&#39;&#39;);
        processed_count = 0;
        index = 1;
        win.$(&#39;#process_bg&#39;).hide().width(&#39;0%&#39;).show();
        win.$(&#39;#process_num&#39;).html(&#39;0&#39;);
        $.dialog.through({
            title: &#39;数据导出进度&#39;,
            content: win.document.getElementById(&#39;processbar&#39;),
            lock: true,
            opacity: &#39;.1&#39;
        },
        function(){
                window.location.reload();
        });
        win.$(&#39;#progress_info&#39;).show().text(&#39;正在导出数据,请耐心等待,请勿关闭窗口...&#39;);
        excel_export2(num, processnum);
    });
}
function excel_export2(num, processnum){
      tabletype=type_arr[iii];
      num = count_arr[tabletype];
      if(typeof(tabletype)==&#39;undefined&#39;&&typeof(num)==&#39;undefined&#39;){
            return false;
      }
      if(ajaxmark==1){
            index = 1;
            ajaxmark=2;
            retrun_var = excel_export_ajax(index, num, processnum, tabletype);
            if(typeof(retrun_var)==&#39;undefined&#39;){            
                  iii++;
                  excel_export2(num, processnum);
                  if(iii>100){
                        return false;
                  }
            }else if(retrun_var==&#39;success&#39;){
                  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 = &#39;ss&#39;;
    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)==&#39;undefined&#39;){
            //alert(&#39;xxxx&#39;);
            setTimeout(function(){exit;},5000);
        }
        if (retrun_var == &#39;success&#39;)
        {
            return false;
        }
    }
    return false;
}
/* AJAX,递归调用 */
function excel_export_ajax(index, num, processnum, tabletype)
{
    $.ajax({
        url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/exportcsv"+search_uri+"/index/"+index+ "/total/" + num + &#39;/tabletype/&#39; + tabletype,
        type: &#39;GET&#39;,
        success: function(data)
        {
            ++processed_count;
            ++index;
            // 更新进度条
            var process_num = parseInt((processed_count / processnum) * 100);
            if (process_num >= 100)
            {
                process_num = 100;
            }
            update_process(process_num);
            //alert(processed_count+&#39;--&#39;+processnum);
            if (processed_count >= processnum)
            {
                backup_compress();
                return &#39;success&#39;;
            }
            if (data == &#39;0&#39;){
                ajaxmark=1;
                return false;
            }
            excel_export_ajax(index, num, processnum, tabletype);
        }
    });
}
/* 更新进度条 */
function update_process(process_num)
{
    win.$(&#39;#process_bg&#39;).show().width(process_num + &#39;%&#39;);
    win.$(&#39;#process_num&#39;).html(process_num);
}
/* 备份文件执行压缩 */
function backup_compress()
{
    win.$(&#39;#progress_info&#39;).text(&#39;正在生成压缩文件...&#39;);
    $.ajax({
        url: "<?php echo WEB_URL;?>/index.php?q=onlinesea/compress/event/<?php echo $event;?>",
        success: function(msg){
            win.$(&#39;#process_bg&#39;).show().width(&#39;100%&#39;);
            win.$(&#39;#process_num&#39;).html(&#39;100&#39;);
            win.$(&#39;#progress_info&#39;).html(&#39;导出数据完成。&nbsp;&nbsp;<a href="&#39; + msg + &#39;" style="color: #006699; text-decoration: underline">下载文件</a>&#39;);
        }
    });
}
function tip()
{
    poptip = $.dialog.through({
        id: &#39;tip&#39;,
        title: &#39;系统消息&#39;,
        content: &#39;正在统计总数,请勿关闭窗口&nbsp;&nbsp;<img src="http://images.cnblogs.com/loading_s.gif" />&#39;,
        width: 300,
        height: 100,
        icon: &#39;system&#39;,
        lock: true,
        opacity: .1
    },
    function(){
        window.location.reload();
    });
    poptip.show();
}
function packetDelete(url,msg)
{
    $.dialog.confirm(msg, function () {
        $.post(url, function(data){
          if(data == &#39;1&#39;){
              $.dialog(&#39;删除成功&#39;, function(){window.location.reload();});
          }
          else if(data == &#39;2&#39;){
            $.dialog(&#39;删除失败&#39;, function(){window.location.reload();});
          }
          else if(data == &#39;3&#39;){
            $.dialog(&#39;文件不存在,或者已删除&#39;, function(){window.location.reload();});
          }
      });
     });
}
</script>

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