vue+axios新手实践实现登陆的示例代码

// store index.js
import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)
// 初始化时用sessionStore.getItem('token'),这样子刷新页面就无需重新登录
const state = {
 user: window.sessionStorage.getItem('user'),
 token: window.sessionStorage.getItem('token')
}
const mutations = {
 //将token保存到sessionStorage里，token表示登陆状态
 SET_TOKEN: (state, data) => {
 state.token = data
 window.sessionStorage.setItem('token', data) 
 },
 //获取用户名
 GET_USER: (state, data) => {
 // 把用户名存起来
 state.user = data
 window.sessionStorage.setItem('user', data)
 },
 //登出
 LOGOUT: (state) => {
 // 登出的时候要清除token
 state.token = null
 state.user = null
 window.sessionStorage.removeItem('token')
 window.sessionStorage.removeItem('user')
 }
}

const actions = {
}
export default new Vuex.Store({
 state,
 mutations,
 actions
})

import store from './store/index'

new Vue({
 el: '#app',
 router,
 store,
 components: { App },
 template: '<App/>'
})

import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login'
import Activity from '../components/Activity'
import Index from '../components/Index'
import store from '../store/index'

Vue.use(Router)

const router = new Router({
 routes: [
 {
  path: '/',
  name: '/',
  component: Index
 },
 {
  path: '/login',
  name: 'login',
  component: Login
 },
 {
  path: '/activity',
  name: 'activity',
  component: Activity,
  meta: {
  requireAuth: true // 添加该字段，表示进入这个路由是需要登录的
  }
 }
 ]
})

// 注册全局钩子用来拦截导航
router.beforeEach((to, from, next) => {
 const token = store.state.token
 if (to.meta.requireAuth) { // 判断该路由是否需要登录权限
 if (token) { // 通过vuex state获取当前的token是否存在
  next()
 } else {
  console.log('该页面需要登陆')
  next({
  path: '/login'
  // query: {redirect: to.fullPath} // 将跳转的路由path作为参数，登录成功后跳转到该路由
  })
 }
 } else {
 next()
 }
})

export default router

submitLogin () {
 this.$refs.loginForm.validate(valid => {
 if (valid) {
  axios.post('/login', {
  user: this.loginForm.user,
  pass: this.loginForm.pass
  })
  .then((response) => {
   if (response.status === 200) {
   this.$store.commit('SET_TOKEN', response.data.token)
   this.$store.commit('GET_USER', response.data.user)
   this.$message({
    message: '登陆成功',
    type: 'success'
   })
   this.$router.push({name: 'activity'})
   }
  })
  .catch(function (error) {
   console.log(error)
  })
 } else {
  console.log('error submit!!')
  return false
 }
 })
},