js;" style="margin: 3px auto 0px; padding: 0px 0px 0px 5px; outline: none; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; width: 640px; line-height: 20px; clear: both; border-left: 3px solid rgb(108, 226, 108);">var map = new BMap.Map('map_canvas');map.getDistance(point1 ,point2);//point1、point2 是Point對(duì)象

import BMap from 'BMap' var BMapLib = window.BMapLib = BMapLib || {}; (function() {      /**      * 地球半徑      */     var EARTHRADIUS = 6370996.81;      /**      * @exports GeoUtils as BMapLib.GeoUtils      */     var GeoUtils =       /**      * GeoUtils類，靜態(tài)類，勿需實(shí)例化即可使用      * @class GeoUtils類的<b>入口</b>。      * 該類提供的都是靜態(tài)方法，勿需實(shí)例化即可使用。      */     BMapLib.GeoUtils = function(){        };      /**      * 將度轉(zhuǎn)化為弧度      * @param {degree} Number 度      * @returns {Number} 弧度      */     GeoUtils.degreeToRad = function(degree){         return Math.PI * degree/180;       }      /**      * 將v值限定在a,b之間，緯度使用      */     function _getRange(v, a, b){         if(a != null){            v = Math.max(v, a);           }         if(b != null){            v = Math.min(v, b);           }         return v;       }      /**     * 將v值限定在a,b之間，經(jīng)度使用     */     function _getLoop(v, a, b){         while( v > b){            v -= b - a           }         while(v < a){            v += b - a           }         return v;       }   /**    * 計(jì)算兩點(diǎn)之間的距離,兩點(diǎn)坐標(biāo)必須為經(jīng)緯度    * @param {lng1} Number 點(diǎn)對(duì)象    * @param {lat1} Number 點(diǎn)對(duì)象    * @param {lng2} Number 點(diǎn)對(duì)象    * @param {lat2} Number 點(diǎn)對(duì)象    * @returns {Number} 兩點(diǎn)之間距離，單位為米    */     GeoUtils.getDistance = function(lng1, lat1, lng2 ,lat2){         let point1 = new BMap.Point(parseFloat(lng1) ,parseFloat(lat1));         let point2 =new BMap.Point(parseFloat(lng2) ,parseFloat(lat2));         //判斷類型         if(!(point1 instanceof BMap.Point) ||             !(point2 instanceof BMap.Point)){             return 0;           }         point1.lng = _getLoop(point1.lng, -180, 180);         point1.lat = _getRange(point1.lat, -74, 74);         point2.lng = _getLoop(point2.lng, -180, 180);         point2.lat = _getRange(point2.lat, -74, 74);         let x1, x2, y1, y2;         x1 = GeoUtils.degreeToRad(point1.lng);         y1 = GeoUtils.degreeToRad(point1.lat);         x2 = GeoUtils.degreeToRad(point2.lng);         y2 = GeoUtils.degreeToRad(point2.lat);         return EARTHRADIUS * Math.acos((Math.sin(y1) * Math.sin(y2) + Math.cos(y1) * Math.cos(y2) * Math.cos(x2 - x1)));       }})();