基于JS抓取某高校附近共享单车位置使用web方式展示位置变化代码实例

Ethel ·

更新时间:2024-11-14

· 906 次阅读

效果如图

使用了高德地图API：https://lbs.amap.com/api/javascript-api/example/marker/massmarks

js代码如下：


function MapOperate() {
}
MapOperate.prototype.listensubmit = function () {
  var self = this;
  var submitBut = $(".submit-btn");
  var time_id = $("#time-id");
  var time_now = new Date(time_id.html());
  submitBut.click(function () {
    var btn = $(this);
    var data_id = btn.attr('data-id');
    var datas = self.format(time_now, "yyyy-MM-dd HH:mm");
    switch (data_id) {
      case data_id = "a":
        console.log("a");
        time_now = new Date(time_id.html());
        var t = time_now.getTime();
        t -= 1900000;
        datas = new Date(t);
        datas = self.format(datas, "yyyy-MM-dd HH:mm");
        break;
      case data_id = "b":
        console.log("b");
        time_now = new Date(time_id.html());
        var t = time_now.getTime();
        t -= 120000;
        datas = new Date(t);
        datas = self.format(datas, "yyyy-MM-dd HH:mm");
        break;
      case data_id = "c":
        console.log("c");
        datas = "2019-05-05 12:01";
        break;
      case data_id = "d":
        console.log("d");
        time_now = new Date(time_id.html());
        var t = time_now.getTime();
        t += 120000;
        datas = new Date(t);
        datas = self.format(datas, "yyyy-MM-dd HH:mm");
        break;
      case data_id = "e":
        console.log("e");
        time_now = new Date(time_id.html());
        var t = time_now.getTime();
        t += 1900000;
        datas = new Date(t);
        datas = self.format(datas, "yyyy-MM-dd HH:mm");
        break;
    }
    console.log(datas);
    var div = document.getElementById("time-id");
    div.innerText = datas;
    $.ajax({
      type: 'post',
      async: false,
      url: '/index',
      data: {
        "datas": datas,
      },
      success: function (result) {
        //stringify()用于从一个对象解析出字符串
        // jsonData = JSON.stringify(result['result']);
        // console.log(jsonData);
        //JSON.parse用于从一个字符串中解析出json对象
        var map = new AMap.Map('container', {
          zoom:15,
          center: [119.03797, 33.548503]
        });
        var jsondata = JSON.stringify(result['result']);
        var dt = JSON.parse(jsondata);
        if (dt.length > 0) {
          var style = [{
            url: 'https://a.amap.com/jsapi_demos/static/images/mass0.png',
            anchor: new AMap.Pixel(6, 6),
            size: new AMap.Size(8, 8)
          }, {
            url: 'https://a.amap.com/jsapi_demos/static/images/mass0.png',
            anchor: new AMap.Pixel(3, 3),
            size: new AMap.Size(8, 8)
          }, {
            url: 'https://a.amap.com/jsapi_demos/static/images/mass0.png',
            anchor: new AMap.Pixel(4, 4),
            size: new AMap.Size(8, 8)
          }
          ];
          var massMarks = [];
          for (var i = 0; i < dt.length; i++) {
            var point = {'lnglat': [dt[i][0], dt[i][1]], 'name': "1", 'id': i};
            massMarks.push(point);
          }
          var mass = new AMap.MassMarks(massMarks, {
            opacity: 0.8,
            zIndex: 111,
            cursor: 'pointer',
            style: style
          });
          var marker = new AMap.Marker({content: ' ', map: map});
          mass.on('mouseover', function (e) {
            marker.setPosition(e.data.lnglat);
            marker.setLabel({content: e.data.name})
          });
          mass.setMap(map);
        }
      }
    });
  });
};
MapOperate.prototype.run = function () {
  var self = this;
  self.listensubmit();
};
MapOperate.prototype.tool = function (ResultList) {
  // 创建地图实例
  var map = new AMap.Map("container", {
    zoom: 13,
    center: [119.038, 33.548],
    resizeEnable: true,
    mapStyle: 'amap://styles/whitesmoke'
  });
  var positions = ResultList;
  var anchor = [
    'bottom-left',
    'bottom-center',
    'bottom-right',
    'middle-left',
    'center',
    'middle-right',
    'top-left',
    'top-center',
    'top-right'
  ];
  var pos_icon = [];
  var pos_marker = [];
  var icon = [];
  var marker = [];
  for (var i = 0; i < 100; i++) {
    // 创建一个 Icon
    pos_icon[i] = new AMap.Icon({
      // 图标尺寸
      size: new AMap.Size(12, 12),
      // 图标的取图地址
      image: '//a.amap.com/jsapi_demos/static/demo-center/marker/marker.png',
      // 图标所用图片大小
      imageSize: new AMap.Size(12, 12),
    });
    // 将 Icon 传入 marker
    pos_marker[i] = new AMap.Marker({
      position: positions[i],
      icon: pos_icon[i],
      anchor: 'center', //设置锚点
      offset: new AMap.Pixel(0, 0) //设置偏移量
    });
    map.add(pos_marker[i]);
  }
};
$(function () {
  var map = new MapOperate();
  map.run();
});
MapOperate.prototype.format = function (now, mask) {
  var d = now;
  var zeroize = function (value, length) {
    if (!length) length = 2;
    value = String(value);
    for (var i = 0, zeros = ''; i < (length - value.length); i++) {
      zeros += '0';
    }
    return zeros + value;
  };
  return mask.replace(/"[^"]*"|'[^']*'|\b(?:d{1,4}|m{1,4}|yy(?:yy)?|([hHMstT])\1?|[lLZ])\b/g, function ($0) {
    switch ($0) {
      case 'd':
        return d.getDate();
      case 'dd':
        return zeroize(d.getDate());
      case 'ddd':
        return ['Sun', 'Mon', 'Tue', 'Wed', 'Thr', 'Fri', 'Sat'][d.getDay()];
      case 'dddd':
        return ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][d.getDay()];
      case 'M':
        return d.getMonth() + 1;
      case 'MM':
        return zeroize(d.getMonth() + 1);
      case 'MMM':
        return ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][d.getMonth()];
      case 'MMMM':
        return ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'][d.getMonth()];
      case 'yy':
        return String(d.getFullYear()).substr(2);
      case 'yyyy':
        return d.getFullYear();
      case 'h':
        return d.getHours() % 12 || 12;
      case 'hh':
        return zeroize(d.getHours() % 12 || 12);
      case 'H':
        return d.getHours();
      case 'HH':
        return zeroize(d.getHours());
      case 'm':
        return d.getMinutes();
      case 'mm':
        return zeroize(d.getMinutes());
      case 's':
        return d.getSeconds();
      case 'ss':
        return zeroize(d.getSeconds());
      case 'l':
        return zeroize(d.getMilliseconds(), 3);
      case 'L':
        var m = d.getMilliseconds();
        if (m > 99) m = Math.round(m / 10);
        return zeroize(m);
      case 'tt':
        return d.getHours() < 12 ? 'am' : 'pm';
      case 'TT':
        return d.getHours() < 12 ? 'AM' : 'PM';
      case 'Z':
        return d.toUTCString().match(/[A-Z]+$/);
      // Return quoted strings with the surrounding quotes removed
      default:
        return $0.substr(1, $0.length - 2);
    }
  });
}

项目地址：https://github.com/longbigbeard/Hellobike_webShow

展示单车 Web js

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