删除原有的所有初始内容，在views下新建WelcomeView组件

安装vue router

在router下新建index.js文件，编写路由：

import {createRouter,createWebHistory} from "vue-router";

const router=createRouter({
    history:createWebHistory(import.meta.env.BASE_URL),
    routes:[
        {
            path:'/',
            name:'welcome',
            component:()=>import('@/views/WelcomeView.vue'),
            children:[]

        }
    ]
})
  
  export default router

配置最外层登陆页面的路由

编写main.js：

import { createApp } from 'vue'
import App from './App.vue'
import router from "@/router";

const app=createApp(App)
app.use(router)
app.mount('#app')

安装element ui

通过按需导入需要下载额外的插件，vite.config.js中添加：

import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'

AutoImport({
      resolvers: [ElementPlusResolver()],
    }),
    Components({
      resolvers: [ElementPlusResolver()],
    }),

编写welcome.vue:

<script setup>

</script>

<template>
  <div style="width: 100vw;height: 100vh;overflow: hidden;display: flex">
    <div style="flex: 1;background-color: black">
      <el-image src="http://pic.bizhi360.com/bbpic/53/11153.jpg" style="width: 100%;height: 100%" fit="cover"/>
    </div>
    <div class="welcome-title">
      <div style="font-size: 30px;font-weight: bold">欢迎来到我们的学习平台</div>
      <div style="margin-top: 10px;">在这里你可以学习如何学习java，如何搭建网站，并且与java之父密切交流</div>
      <div style="margin-top: 5px">在这里你可以同性交友，因为都是男的，没有学java的女生</div>
    </div>
    <div class="right-card">
      <router-view/>
    </div>
  </div>
</template>

<style scoped>
.welcome-title {
  position: absolute;
  bottom:30px;
  left: 30px;
  color: white;
  text-shadow: 0 0 10px;
}
.right-card {
  width: 400px;
  z-index: 1;
  background-color: white;
}
</style>

编写LoginPage.vue:

<script setup>
import {reactive}from 'vue'
import {User,Lock} from '@element-plus/icons-vue'


const form =reactive({
  username:'',
  password:'',
  remember:false
});
</script>

<template>
  <div style="text-align: center;margin:0 20px">
    <div style="margin-top: 150px">
      <div style="font-size: 25px;font-weight: bold">登录</div>
      <div style="font-size: 14px;color: grey">在进入系统之前，请先输入用户名和密码进行登陆</div>
    </div>
  </div>
  <div style="margin-top: 50px;">
    <el-form v-model="form">
      <el-form-item>
        <el-input style="margin: 0 20px" v-model="form.username" maxlength="10" type="text" placeholder="用户名/邮箱">
          <template #prefix>
            <el-icon> <User /> </el-icon>
          </template>
        </el-input>
      </el-form-item>
      <el-form-item>
        <el-input style="margin: 0 20px" v-model="form.password" maxlength="20" placeholder="密码">
          <template #prefix>
            <el-icon> <Lock /> </el-icon>
          </template>
        </el-input>
      </el-form-item>
      <el-row >
        <el-col :span="12" style="text-align:left">
         <el-form-item>
           <el-checkbox  style="margin: 0 20px" v-model="form.remember" label="记住我" />
         </el-form-item>
        </el-col>
        <el-col :span="12" style="text-align:right">
          <el-link style="margin: 0 20px" type="primary">忘记密码？</el-link>
        </el-col>
      </el-row>
    </el-form>
  </div>
  <div style="margin: 40px ;text-align: center">
    <el-button style="width: 270px" type="success" plain>立即登录</el-button>
  </div>
  <el-divider>
    <span style="font-size: 14px;color: grey">没有账号</span>
  </el-divider>
  <div style="text-align: center">
    <el-button style="width: 270px" type="warning" plain>立即注册</el-button>
  </div>
</template>

<style scoped>

</style>