直接把需要的带过去的参数做成个对象，例如下面的obj

向 toNextPage(url, obj) 传递下游页面及参数

 booking(teacherId) {

                const obj = {

                    classdata: this.classdata,

                    teacherId: teacherId

                }

                const url = './Booking.html'

                this.toNextPage(url, obj)

            },

            toNextPage(url, obj) {

                const objJSON = JSON.stringify(obj)

                const objEncode = encodeURI(objJSON)

                const href = url + '?obj=' + objEncode

                window.location.href = href

            },

通过下面这段去获取参数，得到的是一个对象。

getUrlData() {

                //获取后台重定向过来的url的参数

                 const teacherId = this.getQueryVariable('obj')

            },

            //获取后台通过url传过来的参数，要那个参数就在getQueryVariable("这里填上参数键");

  getQueryVariable(variable) {

                var query = window.location.search.substring(1)

                var vars = query.split('&')

                for (var i = 0; i < vars.length; i++) {

                    var pair = vars[i].split('=')

                    if (pair[0] == variable) {

                        var objJSON = decodeURI(pair[1])

                        var obj = JSON.parse(objJSON)

                        return obj

                    }

                }

                return false

            },