1.定义

最后形成这样的结构，system.js为自定义储存的地方

2.需要定义三个地方

1.store/index.js

import Vue from 'vue'
import Vuex from 'vuex'
import getters from './getters'
import system from './modules/system'

Vue.use(Vuex)

const store = new Vuex.Store({
    modules: {
        system
    },
    getters
})

export default store

2.store/getters.js

const getters = {
    projectUnit: state => state.system.projectUnit,
    projectTitleId: state => state.system.projectTitleId,
}
export default getters

3.store/modules/system.js

  const system = {
      namespaced: true,
      state: {
          projectTitleId: "",
          projectUnit: {},
      },
      mutations: {
          SET_PROJECTTITLEID: (state, projectTitleId) => {
              state.projectTitleId = projectTitleId
          },
          SET_PROJECTUNIT: (state, projectUnit) => {
              state.projectUnit = projectUnit
          },
      }
  }

  export default system

3.往里面添加数据

this.$store.commit("system/SET_PROJECTUNIT", this.projectUnit);//在store/modules/system.js里面找到对应的数据
this.$store.commit( "system/SET_PROJECTTITLEID",this.Form.id);

4.取数据

this.$store.getters.projectUnit
this.$store.getters.projectTitleId