使用element ui写一个支持vue2的后台管理页面模板

以下是一个简单的element ui后台管理页面模板，可供参考：

<template>
  <div class="app-container">
    <el-container>
      <el-aside width="200px">
        <div class="logo">
          <img src="logo.png" alt="Logo">
        </div>
        <el-menu :default-active="activeIndex" class="el-menu-vertical-demo" @select="handleMenuSelect">
          <el-submenu index="1">
            <template slot="title">
              <i class="el-icon-location"></i>
              <span>Navigation One</span>
            </template>
            <el-menu-item index="1-1">Option 1</el-menu-item>
            <el-menu-item index="1-2">Option 2</el-menu-item>
            <el-menu-item index="1-3">Option 3</el-menu-item>
          </el-submenu>
          <el-submenu index="2">
            <template slot="title">
              <i class="el-icon-menu"></i>
              <span>Navigation Two</span>
            </template>
            <el-menu-item index="2-1">Option 1</el-menu-item>
            <el-menu-item index="2-2">Option 2</el-menu-item>
            <el-menu-item index="2-3">Option 3</el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-container>
        <el-header>
          <el-row>
            <el-col :span="12">
              <div class="breadcrumb">
                <el-breadcrumb separator="/">
                  <el-breadcrumb-item :to="{ path: '/' }">Home</el-breadcrumb-item>
                  <el-breadcrumb-item>Menu</el-breadcrumb-item>
                  <el-breadcrumb-item>Submenu</el-breadcrumb-item>
                  <el-breadcrumb-item>Option</el-breadcrumb-item>
                </el-breadcrumb>
              </div>
            </el-col>
            <el-col :span="12" class="text-right">
              <el-dropdown>
                <span class="el-dropdown-link">
                  <i class="el-icon-setting"></i>
                  Settings
                  <i class="el-icon-arrow-down el-icon--right"></i>
                </span>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item>Option 1</el-dropdown-item>
                  <el-dropdown-item>Option 2</el-dropdown-item>
                  <el-dropdown-item>Option 3</el-dropdown-item>
                  <el-dropdown-item divided>Option 4</el-dropdown-item>
                  <el-dropdown-item>Option 5</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
              <el-dropdown>
                <span class="el-dropdown-link">
                  <i class="el-icon-bell"></i>
                  Notifications
                  <i class="el-icon-arrow-down el-icon--right"></i>
                </span>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item>Option 1</el-dropdown-item>
                  <el-dropdown-item>Option 2</el-dropdown-item>
                  <el-dropdown-item>Option 3</el-dropdown-item>
                  <el-dropdown-item divided>Option 4</el-dropdown-item>
                  <el-dropdown-item>Option 5</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
              <el-dropdown>
                <span class="el-dropdown-link">
                  <i class="el-icon-user"></i>
                  Username
                  <i class="el-icon-arrow-down el-icon--right"></i>
                </span>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item>Profile</el-dropdown-item>
                  <el-dropdown-item>Settings</el-dropdown-item>
                  <el-dropdown-item divided>Logout</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-col>
          </el-row>
        </el-header>
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeIndex: '1-1'
    }
  },
  methods: {
    handleMenuSelect(index) {
      this.activeIndex = index
    }
  }
}
</script>

<style scoped>
.app-container {
  height: 100%;
}

.logo {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0;
}

.breadcrumb {
  margin-top: 20px;
}

.text-right {
  text-align: right;
}
</style>

该模板包含一个侧边栏和一个顶部导航栏，侧边栏中有一个垂直菜单，顶部导航栏右侧有三个下拉菜单。主内容区域使用了Vue Router来实现页面切换。可以根据实际需要进行修改和扩展