百度地图开发：字符串经纬度转为经纬度数组的解决方案

    var str = "116.387112,39.920977;116.385243,39.91306;116.394226,39.917988";//默认经纬度字符串;
    var PointArr = [];
    //将字符串分离成数组;
    var newArr = str.split(";");
    //将新的数组二次分离为百度坐标系;
    for (var i = 0; i < newArr.length; i++) {
        var lng = newArr[i].split(",")[0];
        var lat = newArr[i].split(",")[1];
        PointArr.push(new BMap.Point(lng, lat));
    }
    //输入坐标系数组;
    console.log(PointArr);

    /*封装函数
     * str,需要转化的经纬度字符串，格式如"116.387112,39.920977;116.385243,39.91306"
     * PointArr,转化后的经纬度坐标数组;
     * */
    function makePoint(str) {
     var PointArr = [];
        //将字符串分离成数组;
        var newArr = str.split(";");
        //将新的数组二次分离为百度坐标系;
        for (var i = 0; i < newArr.length; i++) {
            var lng = newArr[i].split(",")[0];
            var lat = newArr[i].split(",")[1];
            PointArr.push(new BMap.Point(lng, lat));
        }
        return PointArr;
    }
    var str = "116.387112,39.920977;116.385243,39.91306;116.394226,39.917988";//默认经纬度字符串;
    var PointArr = [];
    //输出坐标系数组;
    var points = makePoint(str);
    //调用经纬度坐标;
    console.log(points[0]);