app.js

const apiHost = 'https://www.example.com';/** * 统一调用接口 */function request(url,data,method) {    return new Promise((resolve, reject) => {        wx.showLoading({ title: '加载中...', duration: 6000})        wx.request({            url: apiHost + url,            data: data || {},            header: {                'Content-Type': 'application/json;charset=UTF-8',            },            method: method || 'GET',            dataType: 'json',            responseType: 'text',            success: res => {                wx.hideLoading()                let statusCode = res.statusCode                if(statusCode >=200 && statusCode < 400 && res.data.code == 0){                    resolve(res.data)                }else{                    reject(res)                }            },            fail: res => {                wx.hideLoading()                wx.showToast({                    title: '网络异常，请检查网络状态',                    icon: 'none',                    duration: 3000                })                reject(res)            },        })    })}/** * get方法 */exports.getStudentInfo = function (openid) {   let url = '/student/getByOpenId?open_id=' + openid   return request( url )}/** * post方法 */exports.saveStudentInfo = function (data) {    let url = '/student/save'    return request( url , data , "POST" )}

调用：index.js

const api = require("../../api.js")Page({    onShow: function() {        this.getStudentInfo(openid)    },    getStudentInfo(openid){        let _this = this;        api.getStudentInfo(openid).then(res => {            if(res.code === 0 && res.data){                ...            }        })    },})