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-创新互联
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);
}
});
} 网页题目：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-创新互联
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