function readlog(date,type，operation){
//函数接受3个参数，日期、精度(天时分秒)和操作（查找、刷新或者默认）
    if(date){
    //如果有时间参数则对时间参数进行处理（一般日志名称都是时间加类型）
      var datastr = arguments[0];
      var date = datastr.slice(0,10);
      var hour = datastr.slice(11,13);
      var minute = datastr.slice(11,16);
      var second =datastr.slice(11,19);
      var type = arguments[1];
      //获取精度
    }else{
    //若无时间参数则获取当前时间，然后精度默认
      var date = new date(+new date()+8*3600*1000).toisostring().replace(/t/g,' ').replace(/\.[\d]{3}z/,'').slice(0,10);
      var type=null;
    }
    var op = arguments[2];
    var countresult = 0;
    //对日志结果进行统计
    var logpath = appdirname.slice(0,-3)+'log\\'+'ivsvr_'+date+'.log';
    //拼接日志文件名称
    var logstr = '';
    fs.stat(logpath, function (err, stats) {
    //获取对应的日志文件状态
    if(err){
    //日志不存在或者异常处理信息
      $('#logtipinfo tr td').html('无日志信息可供查看');
      console.log(err);
    }else{
      var linecount = 0;
      var readline = require('readline');
      var freadname = logpath;
      var fread = fs.createreadstream(freadname);
      var objreadline = readline.createinterface({
        input: fread,
      });
      //按行读取日志
      objreadline.on('line', (line)=>{
        var itemstr = $.trim(line);
        var time = itemstr.slice(0,19);
        var content = itemstr.substr(20);
        if(!time || !content){return;}
        ++ linecount;
        //计数行数
        var matched = true;
        var itemstr = $.trim(line);
        var itemarr = itemstr.split(' ');
        var logdate = itemarr[0];
        var logtime = itemarr[1];
        var time = logdate+' '+logtime;
        switch(type){
        //进度查找过滤
          case '0':
          case null:
            matched = true;
            break;
          case '1':
            var timesplit = logtime.slice(0,2);
            if(timesplit == hour){
              matched = true;
              break;
            }
            matched = false;
            break;
          case '2':
            var timesplit = logtime.slice(0,5);
            if(timesplit == minute){
              matched = true;
              break;
            }
            matched = false;
            break;
          case '3':
            var timesplit = logtime.slice(0,8);
            if(timesplit == second){
              matched = true;
              break;
            }
            matched = false;
            break;
          default:
            console.log('unkonw type!');
            break;
        }
        if(matched === true &&(linecount>logreadflag)){
        //日志结果格式化输出呈现
          countresult ++;
          var result = itemarr[2];
          if(result == 'err'){
            var operation = itemarr[4];
            result = '失败：'+itemarr[5]+' '+(itemarr[6]?itemarr[6]:'');
          }else{
            var operation = itemarr[4]+' '+itemarr[5]+(itemarr[6]?itemarr[6]:'');
            result = '成功';
          }
          logstr += '<tr><td>'+time+'</td><td>'+operation+'</td><td>'+result+'</td></tr>'
        }
        logstr += '<tr><td>'+time+'</td><td>'+content+'</td></tr>'
      });
      objreadline.on('close', ()=>{
        if(logreadflag == 0 && (logstr == '')){
          var info = '无日志信息可供查看';
        }
        if(logreadflag >0 && (logstr != '')){
          var newlognum = linecount - logreadflag;
          var info = '刷新成功,更新'+newlognum+'条日志!';
          $('#loginfotable').prepend(logstr);
        }else if(logreadflag >0 && (logstr == '')){
          var info = '刷新成功,无日志更新!';
        }else{
          $('#loginfotable').html(logstr);
        }
        if(op == 'search'){
          var info = '查找到'+countresult+'条日志';
        }
        $('#logtipinfo tr td').html(info);
        if((op == 'search' || op == 'refresh') &&(logreadflag != 0 || newlognum >0 || countresult >0)){
          settimeout(function() {$('#logtipinfo').fadeout(567);}, 2000);
          //操作结束后给出信息反馈，反馈自动淡出消失
        }
        else{
          $('#logtipinfo').hide();
        }
        logreadflag = linecount;
        console.log('closed');
      });
    }
  });
}