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php+ajax實(shí)現(xiàn)帶進(jìn)度條的大數(shù)據(jù)排隊(duì)導(dǎo)出思路以及源碼
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廢話不多說，先上效果圖：

點(diǎn)擊導(dǎo)出，實(shí)現(xiàn)

點(diǎn)擊導(dǎo)出

統(tǒng)計(jì)完成之后

點(diǎn)擊確定

下面來談?wù)剬?shí)現(xiàn)的思路：

前面導(dǎo)出操作簡(jiǎn)單，從第二個(gè)導(dǎo)出操作開始：

點(diǎn)擊"確定"調(diào)用exportCsv函數(shù)

復(fù)制代碼 代碼如下:

a class="on" href="javascript:exportCsv();">em>導(dǎo)出/em>/a>

exportCvs函數(shù)如下
function exportCsv()
{

　//清除等待的轉(zhuǎn)動(dòng)圈
    $('#loading').html('');

 //彈出統(tǒng)計(jì)總數(shù)對(duì)話框，函數(shù)在后面給出定義
    tip();

//ajax請(qǐng)求總數(shù)
    $.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('系統(tǒng)消息');
            poptip.content('查詢結(jié)果為空，不能進(jìn)行數(shù)據(jù)導(dǎo)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++;
            }

　　//當(dāng)數(shù)據(jù)不為空的時(shí)候彈出是否到處框
            exportCsvConfirm(num, processnum);
        }
    });
}

 

//彈出確認(rèn)下載  exportCsvConfirm函數(shù)

function exportCsvConfirm(num, processnum)
{
    var msg = '需要導(dǎo)出的數(shù)據(jù)有 span style="color: red">' + num + '/span> 行，可能會(huì)占用您較多時(shí)間來進(jìn)行導(dǎo)出。br />您還需要繼續(xù)嗎？';

   // 提示是否繼續(xù)
    $.dialog.confirm(msg, function () {
        $('#loading').html('');
        processed_count = 0;
        index = 1;
        win.$('#process_bg').hide().width('0%').show();
        win.$('#process_num').html('0');

        $.dialog.through({
            title: '數(shù)據(jù)導(dǎo)出進(jìn)度',
            content: win.document.getElementById('processbar'),
            lock: true,
            opacity: '.1'
        },
        function(){
                window.location.reload();
        });
       //當(dāng)繼續(xù)的時(shí)候
        win.$('#progress_info').show().text('正在導(dǎo)出數(shù)據(jù)，請(qǐng)耐心等待，請(qǐng)勿關(guān)閉窗口...');
      //開始執(zhí)行導(dǎo)出操作
        excel_export2(num, processnum);
    });
}

關(guān)鍵函數(shù)excel_export2隊(duì)列請(qǐng)求，首先會(huì)在前面定義全局變量

復(fù)制代碼 代碼如下:

var search_uri = "?php echo $uri;?>";
var event = "?php echo $event;?>";
var processed_count = 0;    // 已處理的數(shù)據(jù)條數(shù)
var index = 1;
var iii   = 0;
var ajaxmark = 1;
var win = $.dialog.parent;    // 頂層頁(yè)面window對(duì)象
var count_arr = new Array(?php echo count($this->tables);?>);
var type_arr = new Array();

我們要定義全局變量  index   和iii ，ajaxmark  ,index主要用于對(duì)一個(gè)表數(shù)據(jù)太多的時(shí)候進(jìn)行分批導(dǎo)出 ，iii用來控制隊(duì)列循環(huán)，ajaxmark用來判斷前一個(gè)請(qǐng)求是否執(zhí)行成功了，成功的話在執(zhí)行下面的請(qǐng)求

復(fù)制代碼 代碼如下:

function excel_export2(num, processnum){
      //獲取tabletype
      tabletype=type_arr[iii];

     //獲取總數(shù)
      num = count_arr[tabletype];

    //判斷是否數(shù)組是否執(zhí)行完畢
      if(typeof(tabletype)=='undefined'typeof(num)=='undefined'){
            return false;
      }

     //判斷是否有上一個(gè)ajax請(qǐng)求是否完成
      if(ajaxmark==1){

            index = 1;
           //將ajax請(qǐng)求標(biāo)記為未執(zhí)行完成

　　　　ajaxmark=2;

          //執(zhí)行ajax請(qǐng)求，函數(shù)在后面給出
            retrun_var = excel_export_ajax(index, num, processnum, tabletype);
            //判斷函數(shù)返回
            if(typeof(retrun_var)=='undefined'){           

　　　　　　//將iii自增，執(zhí)行下一個(gè)數(shù)組數(shù)據(jù)
                  iii++;

　　　　　　//遞歸調(diào)用自己
                  excel_export2(num, processnum);
                  if(iii>100){
                        return false;
                  }

　　　　//當(dāng)ajax返回成功的時(shí)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秒檢查是否ajax請(qǐng)求結(jié)束，這里settimeout 不能傳遞參數(shù)，只能通過_excel_export2這種形式
            setTimeout(_excel_export2(num, processnum),3000);
      }
}

function _excel_export2(num, processnum){
       return function(){
             excel_export2(num, processnum);
       }
}

 

//excel_export_ajax函數(shù)  執(zhí)行導(dǎo)出
/* AJAX，遞歸調(diào)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)
        {

　　　　//執(zhí)行次數(shù)自增
            ++processed_count;

　　　　//當(dāng)一個(gè)表數(shù)據(jù)太多，分批導(dǎo)出
            ++index;
            // 更新進(jìn)度條
　　　　//判斷進(jìn)度
            var process_num = parseInt((processed_count / processnum) * 100);
　　　　
            if (process_num >= 100)
            {
                process_num = 100;
            }

　　　　//跟新進(jìn)度條
            update_process(process_num);
            //alert(processed_count+'--'+processnum);

　　　　//當(dāng)執(zhí)行結(jié)束
            if (processed_count >= processnum)
            {

　　　　　　//壓縮文件
                backup_compress();

                return 'success';
            }
            if (data == '0'){

　　　　　　//將ajax請(qǐng)求標(biāo)記為執(zhí)行完畢，執(zhí)行下一個(gè)url請(qǐng)求
                ajaxmark=1;
                return false;
            }
            當(dāng)一個(gè)表的數(shù)據(jù)未導(dǎo)出完成的時(shí)候，會(huì)循環(huán)調(diào)用自己去請(qǐng)求， php函數(shù)或判斷是否到處完成，導(dǎo)出完成返回0  ，未完成返回1
            excel_export_ajax(index, num, processnum, tabletype);
        }
    });
}

/* 備份文件執(zhí)行壓縮 */
function backup_compress()
{
    win.$('#progress_info').text('正在生成壓縮文件...');

    $.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('導(dǎo)出數(shù)據(jù)完成。nbsp;nbsp;a href="' + msg + '" style="color: #006699; text-decoration: underline">下載文件/a>');
        }
    });
}

/* 更新進(jìn)度條 */
function update_process(process_num)
{
    win.$('#process_bg').show().width(process_num + '%');
    win.$('#process_num').html(process_num);
}

下面附上源碼，咳咳相關(guān)php程序大家自己腦補(bǔ)下吧

復(fù)制代碼 代碼如下:

script type="text/javascript" language="javascript">
var search_uri = "?php echo $uri;?>";
var event = "?php echo $event;?>";
var processed_count = 0;    // 已處理的數(shù)據(jù)條數(shù)
var index = 1;
var iii   = 0;
var ajaxmark = 1;
var win = $.dialog.parent;    // 頂層頁(yè)面window對(duì)象
var count_arr = new Array(?php echo count($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('系統(tǒng)消息');
            poptip.content('查詢結(jié)果為空，不能進(jìn)行數(shù)據(jù)導(dǎo)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 = '需要導(dǎo)出的數(shù)據(jù)有 span style="color: red">' + num + '/span> 行，可能會(huì)占用您較多時(shí)間來進(jìn)行導(dǎo)出。br />您還需要繼續(xù)嗎？';
    $.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: '數(shù)據(jù)導(dǎo)出進(jìn)度',
            content: win.document.getElementById('processbar'),
            lock: true,
            opacity: '.1'
        },
        function(){
                window.location.reload();
        });

        win.$('#progress_info').show().text('正在導(dǎo)出數(shù)據(jù)，請(qǐng)耐心等待，請(qǐng)勿關(guān)閉窗口...');

        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);
       }
}
/* 執(zhí)行導(dǎo)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，遞歸調(diào)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;
            // 更新進(jìn)度條

            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);
        }
    });
}

/* 更新進(jìn)度條 */
function update_process(process_num)
{
    win.$('#process_bg').show().width(process_num + '%');
    win.$('#process_num').html(process_num);
}

/* 備份文件執(zhí)行壓縮 */
function backup_compress()
{
    win.$('#progress_info').text('正在生成壓縮文件...');

    $.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('導(dǎo)出數(shù)據(jù)完成。nbsp;nbsp;a href="' + msg + '" style="color: #006699; text-decoration: underline">下載文件/a>');
        }
    });
}
function tip()
{
    poptip = $.dialog.through({
        id: 'tip',
        title: '系統(tǒng)消息',
        content: '正在統(tǒng)計(jì)總數(shù)，請(qǐng)勿關(guān)閉窗口nbsp;nbsp;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('刪除成功', function(){window.location.reload();});
          }
          else if(data == '2'){
            $.dialog('刪除失敗', function(){window.location.reload();});
          }
          else if(data == '3'){
            $.dialog('文件不存在，或者已刪除', function(){window.location.reload();});
          }
      });
     });
}
/script>

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