mockjs 在项目中vue项目中使用

一、为什么要使用mockjs

总结起来就是在后端接口没有开发完成之前，前端可以用已有的接口文档，在真实的请求上拦截ajax，并根据mockjs的mock数据的规则，模拟真实接口返回的数据，并将随机的模拟数据返回参与相应的数据交互处理，这样真正实现了前后台的分离开发。

二、在vue的项目中怎么去使用mockjs

1、下载mockjs

npm install mockjs --save

2、使用mockjs

2.1在项目目录中新建mock/mockServer.js  模拟服务端

import Mock from 'mockjs'
const swipes = [
  {
    imgUrl:"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1556531040198&di=c6dabc6bb5c6524f9b77ceded00d1fce&imgtype=0&src=http%3A%2F%2Fi3.hexun.com%2F2019-04-28%2F196992413.jpg"
  },
  {
    imgUrl:"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1556531040180&di=0feae9ec159834591880d72c34137235&imgtype=0&src=http%3A%2F%2Fm1080.com%2Fupimg%2Fzyzp1%2F145186.jpg"
  },
  {
    imgUrl:"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1556531040164&di=b228224bb92c8baa6fbfa1ac6d31398c&imgtype=0&src=http%3A%2F%2Fimg.smzy.com%2Fimges%2F2017%2F0510%2F20170510101016609.jpg"
  }
];
const patients =[
  {
    id:'1',
    title:'张大爷',
    label:'男',
    path:'/patient',
    imgUrl:'../../static/images/20170622131955_h4eZS.thumb.700_0.jpeg'
  },
  {
    id:'2',
    title:'李大爷',
    label:'男',
    path:'/patient',
    imgUrl:'../../static/images/20170622131955_h4eZS.thumb.700_0.jpeg'
  },
  {
    id:'3',
    title:'张奶奶',
    label:'女',
    path:'/patient',
    imgUrl:'../../static/images/20170622131955_h4eZS.thumb.700_0.jpeg'
  },
  {
    id:'4',
    title:'李大爷',
    label:'男',
    path:'/patient',
    imgUrl:'../../static/images/20170622131955_h4eZS.thumb.700_0.jpeg'
  },
  {
    id:'5',
    title:'王奶奶',
    label:'女',
    path:'/patient',
    imgUrl:'../../static/images/20170622131955_h4eZS.thumb.700_0.jpeg'
  }
];
Mock.mock('/swipes',swipes);
Mock.mock('/patients',patients);
Mock.mock("/patient", "post", (options)=>{
  const jsonObj = eval('(' + options.body + ')');
  const patient = patients.filter(p=>p.id == jsonObj.pid);
  return patient[0];
});

2.2在main.js项目全局文件中引入mockServer

 import './mock/mockServer' //加载mockServer 

2.3前端发送ajax去请求mockServer 的 数据

/*
ajax请求函数模块
返回值: promise对象(异步返回的数据是: response.data)
 */
import axios from 'axios'
export default function ajax (url, data={}, type='GET') {

  return new Promise(function (resolve, reject) {
    // 执行异步ajax请求
    let promise
    if (type === 'GET') {
      // 准备url query参数数据
      let dataStr = '' //数据拼接字符串
      Object.keys(data).forEach(key => {
        dataStr += key + '=' + data[key] + '&'
      })
      if (dataStr !== '') {
        dataStr = dataStr.substring(0, dataStr.lastIndexOf('&'))
        url = url + '?' + dataStr
      }
      // 发送get请求
      promise = axios.get(url)
    } else {
      // 发送post请求
      promise = axios.post(url, data)
    }
    promise.then(function (response) {
      // 成功了调用resolve()
      resolve(response.data)
    }).catch(function (error) {
      //失败了调用reject()
      reject(error)
    })
  })
}

/*
包含n个接口请求函数的模块
函数的返回值: promise对象
 */
import ajax from './ajax';

//1、获取swipe的图片列表
export const reqSwipes = ()=>ajax(`/swipes`,);

//2、获取所有病人信息列表
export const reqPatients = ()=>ajax(`/patients`);

//3、根据pid获取病人信息
export const reqPatientByPid = (pid)=>ajax(`/patient`,{pid},"POST");