VUEX储存登陆用户的信息，方便在需要的模块调用：
1.项目结构
在src文件夹下创建store文件夹，包含actions.js、getter.js、index.js、mutation.js

2.代码
（1）index.js

import Vue from 'vue';
import Vuex from 'vuex';
import * as getters from './getters';
import * as mutations from './mutations';
import * as actions from './actions';

Vue.use(Vuex);

const state = {
    information: {}
};

export default new Vuex.Store({
    state,
    getters,
    mutations,
    actions
});

（2）actions.js

export const information = ({ commit }, data) => {
    commit('information', data);
};

（3）getter.js

export const information = state => state.information;

（4）mutations.js

export const information = (state, data) => {
    state.information = data;
};

（5）在main.js中引入

import Vue from 'vue';
import App from './App.vue';
import store from './store/index';
Vue.config.productionTip = false;
Vue.prototype.$store = store;

new Vue({
  render: h => h(App),
}).$mount('#app');

（6）存入

this.$axios.get('')
                .then(res => {
                    this.$store.dispatch('information', res.datas);
                }).catch(err => {
                    console.log(err);
                });

（7）模块中调用

<span>下午好，{{ username }}</span>

computed: {
        username() {
            if (this.$store.getters.information.real) {
                return this.$store.getters.information.real.realName;
            } else {
                return '***';
            }
        }
    },