1.新建store文件
新建index.js，代码：

// import {
// 	createPinia
// } from 'pinia'
//const store = createPinia()
import * as Pinia from 'pinia'
const pinia = Pinia.createPinia()  export * from "./modules/user"
export * from "./modules/me"
export * from "./modules/order"
export * from "./modules/socket"
export default pinia

2.在mian.js 加上代码
这个能在vue和nvue文件上执行

import {createSSRApp
} from 'vue'
import * as Pinia from "pinia";
import pinias from "@/store";
export function createApp() {const app = createSSRApp(App)const store = Pinia.createPinia();app.use(pinias);app.use(store);return {app,Pinia}
}

这个只能在vue文件执行

import {createSSRApp
} from 'vue'
import pinia from "@/store";
export function createApp() {const app = createSSRApp(App)app.use(pinia);return {app,Pinia}
}

页面调用

import {useUserStore
} from "@/store/index.js"
const userStore  = useUserStore()