1、首先需要装vuex 

npm install vuex -d

2、新建store文件夹，新建index.js， 并引入vue、vuex,代码如下：

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)
const key = 'user'
const store = new Vuex.Store({
  state () {
    return {
      user: null
    }
  },
  getters: {
    getStorage: function (state) {
      if (!state.user) {
        state.user = JSON.parse(localStorage.getItem(key))
      }
      return state.user
    }
  },
  mutations: {
    $_setStorage (state, value) {
      state.user = value
      localStorage.setItem(key, JSON.stringify(value))
    },
    $_removeStorage (state) {
      state.user = null
      localStorage.removeItem(key)
    }
  }
})

export default store

3、在main.js中引入store,

import store from './store/index'

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

4、在登录组件中，如代码所示：

this.$message({
   message: '登录成功',
   type: 'success'
})
this.$store.commit('$_setStorage', {user: this.loginForm.username})
this.$router.push({name: 'Home'})

5、储存其他状态类信息，方式相同。