目录
动态树
数据表
案列
书籍管理
动态树
动态树(Dynamic tree)是一种数据结构,它可以在树中动态地插入、删除和修改节点。与静态树不同,静态树的节点是固定的,一旦构建完成就无法再进行修改。而动态树可以在运行时根据需要进行节点的插入、删除和修改操作。
在计算机科学中,动态树常用于解决一些与树相关的问题,如动态连通性问题、动态最小生成树问题等。动态树的设计和实现较为复杂,通常会使用一些高级数据结构和算法,如平衡二叉树、堆等。
动态树的应用场景很广泛,例如在网络路由算法中可以使用动态树来维护网络拓扑结构,以便动态地调整路由路径;在图像处理中可以使用动态树来表示图像的层次结构,以便进行图像的快速搜索和修改等。
数据表
首先先创建数据表以及添加好数据
案列
在src/api目录下增加action.js的地址配置
/*** 对后台请求的地址的封装,URL格式如下:* 模块名_实体名_操作*/
export default {'SERVER': 'http://localhost:8080/ssm', //服务器'SYSTEM_USER_DOLOGIN': '/user/userLogin', //登陆'SYSTEM_USER_DOREG': '/userAction.action', //注册'SYSTEM_MENUS': '/module/queryRootNode', //左侧菜单树'getFullPath': k => { //获得请求的完整地址,用于mockjs测试时使用return this.SERVER + this[k];}
}
AppMain.vue的组件代码中修改<template>标签中的代码
<template><el-container class="main-container"><el-aside v-bind:class="asideClass"><LeftNav></LeftNav></el-aside><el-container><el-header class="main-header"><TopNav></TopNav></el-header><el-main class="main-center"><router-view></router-view></el-main></el-container></el-container>
</template>
LeftNav.vue编写组件中的代码
<template><el-menu router :default-active="$route.path" default-active="2" class="el-menu-vertical-demo" background-color="#334157" text-color="#fff"active-text-color="#ffd04b" :collapse="collapsed"><div class="logobox"><img class="logoimg" src="../assets/img/logo.png" alt=""></div><el-submenu v-for="m in menus" :index="'idx_'+m.id" :key="'key_'+m.id"><template slot="title"><i :class="m.iocn"></i><span>{{m.text}}</span></template><el-menu-item v-for="m2 in m.modules" :index="m2.url" :key="'key_'+m2.id"><i class="m2.icon"></i><span>{{m2.text}}</span></el-menu-item></el-submenu></el-menu>
</template>
<script>export default {data() {return {collapsed: false,menus: []}},created() {this.$root.Bus.$on('aaa', v => {this.collapsed = v;});let url = this.axios.urls.SYSTEM_MENUS;this.axios.get(url, {}).then(r => {console.log(r);this.menus = r.data.rows;}).catch(e => {})}}
</script>
<style>.el-menu-vertical-demo:not(.el-menu--collapse) {width: 240px;min-height: 400px;}.el-menu-vertical-demo:not(.el-menu--collapse) {border: none;text-align: left;}.el-menu-item-group__title {padding: 0px;}.el-menu-bg {background-color: #1f2d3d !important;}.el-menu {border: none;}.logobox {height: 40px;line-height: 40px;color: #9d9d9d;font-size: 20px;text-align: center;padding: 20px 0px;}.logoimg {height: 40px;}
</style>
在src/views目录中创建book文件,再在book的文件下创建以下两个组件
AddBook.vue
<template><h1>书籍的新增</h1>
</template><script>
</script><style>
</style>
BookList.vue
<template><h1>书籍的数据</h1>
</template><script>
</script><style>
</style>
在src/router目录中的index.js下配置路径
import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import AppMain from '@/components/AppMain'
import LeftNav from '@/components/LeftNav'
import TopNav from '@/components/TopNav'
import Login from '@/views/Login'
import Register from '@/views/Register'
import AddBook from '@/views/book/AddBook'
import BookList from '@/views/booK/BookList'
Vue.use(Router)export default new Router({routes: [{path: '/',name: 'Login',component: Login}, {path: '/Register',name: 'Register',component: Register}, {path: '/AppMain',name: 'AppMain',component: AppMain,children: [{path: '/LeftNav',name: 'LeftNav',component: LeftNav}, {path: '/TopNav',name: 'TopNav',component: TopNav},{path: '/book/AddBook',name: 'AddBook',component: AddBook}, {path: '/booK/BookList',name: 'BookList',component: BookList}]}]
})
效果图
书籍管理
BookList.vue 的组件中编写
<template><div class="Book" style="padding: 30px;"><!-- 输入框搜索 --><el-form :inline="true" class="demo-form-inline"><el-form-item label="书籍名称 : "><el-input v-model="bookname" placeholder="书籍名称"></el-input></el-form-item><el-form-item><el-button type="primary" plain @click="onSubmit">查询</el-button></el-form-item></el-form><!-- 书籍的书籍表格 --><el-table :data="tableData" style="width: 100%"><el-table-column prop="id" label="书籍ID"></el-table-column><el-table-column prop="bookname" label="书籍名称"></el-table-column><el-table-column prop="price" label="书籍价格"></el-table-column><el-table-column prop="booktype" label="书籍类型"></el-table-column></el-table><!-- 分页 --><div class="block" style="padding: 20px;"><el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="page"background :page-sizes="[10, 20, 30, 40]" :page-size="rows" layout="total, sizes, prev, pager, next, jumper":total="total"></el-pagination></div></div></template><script>export default {data() {return {bookname: '',tableData: [],rows: 10,total: 0,page: 1}},methods: {handleSizeChange(r) {//当页大小发生变化let params = {bookname: this.bookname,rows: r,page: this.page}// console.log(params)this.query(params);},handleCurrentChange(p) {//当前页码大小发生变化let params = {bookname: this.bookname,rows: this.rows,page: p}// console.log(params)this.query(params);},query(params) {//获取后台请求书籍数据的地址let url = this.axios.urls.SYSTEM_BookList;this.axios.get(url, {params: params}).then(d => {console.log(url)this.tableData = d.data.rows;this.total = d.data.total;}).catch(e => {});},onSubmit() {let params = {bookname: this.bookname}console.log(params)this.query(params);this.bookname = ''}},created() {this.query({})}}
</script><style>
</style>
查询效果