解决：
配置main.js/tsimport ElementPlus from 'element-plus'
import 'element-plus/dist/index.css' import 'dayjs/locale/zh-cn';//中文 import locale from 'element-plus/lib/locale/lang/zh-cn';//中文
const app = createApp(App) app.use(ElementPlus,{ locale }).mount('#app')
标签：picker,控件,ElementPlus,locale,app,element,plus,import From： https://www.cnblogs.com/ccad/p/16822448.html