【Vue.js】使用ElementUI搭建动态树&数据表格与分页

一，动态树

本文章为上一篇文章拓展内容==》》实现首页导航及左侧菜单

将左侧菜单结构更换为下面代码：

菜单结构：

<el-menu>
	<el-submenu index="" key="">
        <template slot="title">
            <i class=""></i>
            <span></span>
        </template>
		<el-menu-item index="" key="">
            <i class=""></i>
            <span></span>
        </el-menu-item>
	</el-submenu>
</el-menu>

第一级节点el-submenu中key属性唯一，index属性唯一，而index属性用于控制菜单折叠； 第二级节点el-menu-item中key属性唯一，index属性唯一，而index属性用于控制页面跳转；

配置action.js

action.js:

	'SYSTEM_MENUS': '/module/queryRootNode',   //左侧动态树 

vue+element的el-menu组件实现路由跳转及当前项的设置:

<el-menu router :default-active="$route.path">
   
</el-menu>

注1：要实现路由跳转，先要在el-menu标签上添加router属性，然后只要在每个el-menu-item标签内的index属性设置一下url即可实现点击el-menu-item实现路由跳转

注2：导航当前项，在el-menu标签中绑定 :default-active="$route.path"，注意是绑定属性，不要忘了加“:”，当$route.path等于el-menu-item标签中的index属性值时则该item为当前项。

注3：el-submenu标签中的url属性不能为空，且不能相同，否则会导致多个节点收缩/折叠效果相同的问题

1.1 前端导航菜单

<template>
	<el-menu router :default-active="$route.path" default-active="2" class="el-menu-vertical-demo"
		background-color="#334157" text-color="#fff" active-text-color="#ffd04b" :collapse="collapsed">
		<!-- <el-menu default-active="2" :collapse="collapsed" collapse-transition router :default-active="$route.path" unique-opened class="el-menu-vertical-demo" background-color="#334157" text-color="#fff" active-text-color="#ffd04b"> -->
		<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="'Key1'+m.id">
				<template slot="title">
					<i :class="m.icon"></i>
					<span>{
   
   {m.text}}</span>
				</template>
				<el-menu-item v-for="m2 in m.modules" :index="m2.url" :key="'Key2_'+m2.id">
					<i :class="m2.icon"></i>
					<span>{
   
   {m2.text}}</span>
				</el-menu-item>
			</el-submenu>
		
		
	</el-menu>
</template>

1.2 后端数据controller：

package com.zking.ssm.controller;

import com.zking.ssm.model.Book;
import com.zking.ssm.service.IBookService;
import com.zking.ssm.util.JsonResponseBody;
import com.zking.ssm.util.PageBean;
import com.zking.ssm.vo.BookFileVo;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

@Controller
@RequestMapping("/book")
public class BookController {

    @Autowired
    private IBookService bookService;

    @RequestMapping("/addBook")
    @ResponseBody
    public JsonResponseBody<?> addBook(Book book){
        try {
            bookService.insert(book);
            return new JsonResponseBody<>("新增书本成功",true,0,null);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("新增书本失败",false,0,null);
        }
    }

    @RequestMapping("/editBook")
    @ResponseBody
    public JsonResponseBody<?> editBook(Book book){
        try {
            bookService.updateByPrimaryKey(book);
            return new JsonResponseBody<>("编辑书本成功",true,0,null);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("编辑书本失败",false,0,null);
        }
    }

    @RequestMapping("/delBook")
    @ResponseBody
    public JsonResponseBody<?> delBook(Book book){
        try {
            bookService.deleteByPrimaryKey(book.getId());
            return new JsonResponseBody<>("删除书本成功",true,0,null);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("删除书本失败",false,0,null);
        }
    }

    @RequestMapping("/queryBookPager")
    @ResponseBody
    public JsonResponseBody<List<Book>> queryBookPager(Book book, HttpServletRequest req){
        try {
            PageBean pageBean=new PageBean();
            pageBean.setRequest(req);
            List<Book> books = bookService.queryBookPager(book, pageBean);
            return new JsonResponseBody<>("OK",true,pageBean.getTotal(),books);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("分页查询书本失败",false,0,null);
        }
    }

    @RequestMapping("/queryBookCharts")
    @ResponseBody
    public JsonResponseBody<?> queryBookCharts(){
        try{
            Map<String, Object> charts = bookService.queryBookCharts();
            return new JsonResponseBody<>("OK",true,0,charts);
        }catch (Exception e){
            e.printStackTrace();
            return new JsonResponseBody<>("查询统计分析数据失败",false,0,null);
        }
    }

    @RequestMapping("/upload")
    @ResponseBody
    public JsonResponseBody<?> upload(BookFileVo bookFileVo){
        try {
            MultipartFile bookFile = bookFileVo.getBookFile();
            System.out.println(bookFileVo);
            System.out.println(bookFile.getContentType());
            System.out.println(bookFile.getOriginalFilename());
            return new JsonResponseBody<>("上传成功",true,0,null);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("上传失败",false,0,null);
        }
    }

    @RequestMapping("/download")
    public void download(HttpServletRequest request, HttpServletResponse response){
        try {
            String relativePath = "uploads/1.jpg";
            String absolutePath = request.getRealPath(relativePath);
            InputStream is = new FileInputStream(new File(absolutePath));
            OutputStream out = response.getOutputStream();
            response.setContentType("application/octet-stream");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("1.jpg", "UTF-8"));
            byte[] by = new byte[1024];
            int len = -1;
            while (-1 != (len = is.read(by))) {
                out.write(by);
            }
            is.close();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @RequestMapping("/downloadUrl")
    public void downloadUrl(HttpServletRequest request, HttpServletResponse response){
        String relativePath = "uploads/1.jpg";
        String absolutePath = request.getRealPath(relativePath);
        InputStream is = null;
        OutputStream out = null;

        try {
            is = new FileInputStream(new File(absolutePath));
            // 设置Content-Disposition
            response.setHeader("Content-Disposition",
                    "attachment;filename=" + URLEncoder.encode("1.jpg", "UTF-8"));
            out = response.getOutputStream();
            IOUtils.copy(is, out);
            response.flushBuffer();
            System.out.println("完成");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(out);
        }
    }
}

1.3 数据绑定

<script>
	export default {
		data() {
			return {
				collapsed: false,
				menus: []
			}
		},
		created() {
			this.$root.Bus.$on('aaa', r => {
				this.collapsed = r;
			});

			let url = this.axios.urls.SYSTEM_MENUS;
			this.axios.get(url, {}).then(r => {
				console.log(r);
				this.menus = r.data.rows;
			}).catch(e => {

			})

		}
	}
</script>

1.4 路由绑定页面编写

2.3.1 编写vue界面以便数据的显示与跳转：

AddBook:

<template>
	<h1>书籍新增</h1>
</template>

<script>
</script>

<style>
</style>

 BookList.vue:

<template>
   <div>
    <!-- 上搜索框 -->
	<div class="books">
	    <el-form :inline="true" class="demo-form-inline" style="margin-top: 40px; margin-left: 20px;">
	      <el-form-item label="书本名称">
	        <el-input v-model="bookname" placeholder="请输入书本名称..."></el-input>
	      </el-form-item>
	 
	      <el-form-item>
	        <el-button type="primary" @click="onSubmit">查询</el-button>
	      </el-form-item>
	    </el-form>
	  </div>
	
	<!-- 中 数据表格 -->
	
	
	<el-table :data="tableData" style="width: 100%">
	  <el-table-column prop="id" label="书本编号" width="180"></el-table-column>
	  <el-table-column prop="bookname" label="书本名称" width="180"></el-table-column>
	  <el-table-column prop="price" label="书本价格"></el-table-column>
	  <el-table-column prop="booktype" label="书本类型"></el-table-column>
	</el-table>
		 
	
	<!-- 下 分页条 -->
	<div class="block">
	  <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="page"
	    :page-sizes="[10, 20, 30, 40]" :page-size="rows" layout="total, sizes, prev, pager, next, jumper" :total="total">
	  </el-pagination>
	</div>
		 

      </div>
</template>

在index.js路由绑定页面

在index.js配置：

indedx.js总代码：

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
		}]
	}]
})

二，数据表格与分页

首先我们分析一下，我们右侧有那些内容？然后去到我们ELementUI官网查找相对应的案例代码，我们首先需要一个form表单提供我们输入书籍名称进行模糊查询，还需要数据表格展示数据，其次就是底部的分页条来完成分页效果，知道了需求我们直接去找案例代码即可

2.1 后端接口定义Controller:

    @RequestMapping("/queryBookPager")
    @ResponseBody
    public JsonResponseBody<List<Book>> queryBookPager(Book book, HttpServletRequest req){
        try {
            PageBean pageBean=new PageBean();
            pageBean.setRequest(req);
            List<Book> books = bookService.queryBookPager(book, pageBean);
            return new JsonResponseBody<>("OK",true,pageBean.getTotal(),books);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("分页查询书本失败",false,0,null);
        }
    }

action.js文件添加下列接口

'BOOK_LIST': '/book/queryBookPager', //书籍查询

2.2 前端编写：

<template>
   <div>
    <!-- 上搜索框 -->
	<div class="books">
	    <el-form :inline="true" class="demo-form-inline" style="margin-top: 40px; margin-left: 20px;">
	      <el-form-item label="书本名称">
	        <el-input v-model="bookname" placeholder="请输入书本名称..."></el-input>
	      </el-form-item>
	 
	      <el-form-item>
	        <el-button type="primary" @click="onSubmit">查询</el-button>
	      </el-form-item>
	    </el-form>
	  </div>
	
	<!-- 中 数据表格 -->
	<el-table :data="tableData" style="width: 100%">
	  <el-table-column prop="id" label="书本编号" width="180"></el-table-column>
	  <el-table-column prop="bookname" label="书本名称" width="180"></el-table-column>
	  <el-table-column prop="price" label="书本价格"></el-table-column>
	  <el-table-column prop="booktype" label="书本类型"></el-table-column>
	</el-table>
		 
	
	<!-- 下 分页条 -->
	<div class="block">
	  <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="page"
	    :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,
				page:1,
				total:0
			}
		},
		methods:{
			query(params){
			let url=this.axios.urls.Book_LIST;
			this.axios.get(url,{params:params}).then(r=>{
				console.log(r);
				this.tableData=r.data.rows;
				this.total=r.data.total;
			}).catch(e=>{
			})	
			},
		   onSubmit(){
			   let params={
			   	bookname:this.bookname
			   }
			   this.query(params);
		   },	
		   
		   //当页大小发生变化
		   handleSizeChange(r){
			   console.log("当前源码")
			   let params={
			   	bookname:this.bookname,
				rows:r,
				page:this.page
			   }
			   this.query(params)
		   },
		   //当前页码发生变化
		   handleCurrentChange(p){  
			   let params={
			   	bookname:this.bookname,
			   	rows:this.rows,
			   	page:p
			   }
			   this.query(params);
		   }
		},
		
		created(){
			this.query({});
		}
		
	}
	
</script>

效果图：