基于Vue+ELement搭建动态树与数据表格实现分页

一、前言

在上一篇博文我们搭建了首页导航和左侧菜单，但是我们的左侧菜单是死数据今天我们就来把死的变成活的，并且完成右侧内容的书籍数据表格的展示与分页效果，话不多说上代码！

二、左侧动态树实现

2.1.后台数据接口定义

package com.zking.ssm.controller;
 
import com.zking.ssm.model.Module;
import com.zking.ssm.model.RoleModule;
import com.zking.ssm.model.TreeNode;
import com.zking.ssm.service.IModuleService;
import com.zking.ssm.util.JsonResponseBody;
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 java.util.List;
 
@Controller
@RequestMapping("/module")
public class ModuleController {
 
    @Autowired
    private IModuleService moduleService;
 
    @RequestMapping("/queryRootNode")
    @ResponseBody
    public JsonResponseBody<List<Module>> queryRootNode(){
        try {
            List<Module> modules = moduleService.queryRootNode(-1);
            return new JsonResponseBody<>("OK",true,0,modules);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("初始化首页菜单错误",false,0,null);
        }
    }
 
    @RequestMapping("/queryElementTree")
    @ResponseBody
    public JsonResponseBody<List<TreeNode>> queryElementTree(){
        try {
            List<TreeNode> modules = moduleService.queryTreeNode(-1);
            return new JsonResponseBody<>("OK",true,0,modules);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("初始化ElementUI的Tree组件错误",false,0,null);
        }
    }
 
    @RequestMapping("/addRoleModule")
    @ResponseBody
    public JsonResponseBody<?> addRoleModule(RoleModule roleModule){
        try {
            moduleService.addRoleModule(roleModule);
            return new JsonResponseBody<>("新增角色权限成功",true,0,null);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("新增角色权限失败",false,0,null);
        }
    }
 
    @RequestMapping("/queryModuleByRoleId")
    @ResponseBody
    public JsonResponseBody<List<String>> queryModuleByRoleId(RoleModule roleModule){
        try {
            List<String> modules = moduleService.queryModuleByRoleId(roleModule);
            return new JsonResponseBody<>("OK",true,0,modules);
        } catch (Exception e) {
            e.printStackTrace();
            return new JsonResponseBody<>("获取角色权限失败",false,0,null);
        }
    }
}

2.2.前端导航菜单绑定

api

/**
 * 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/', //服务器
	'SYSTEM_USER_DOLOGIN': '/user/userLogin', //登陆
	'SYSTEM_USER_DOREG': '/user/userRegister', //注册
	'SYSTEM_USER_MENUS': '/module/queryRootNode', //左侧
	'BOOK_LIST': '/book/queryBookPager', //书籍列表
	'getFullPath': k => { //获得请求的完整地址，用于mockjs测试时使用
		return this.SERVER + this[k];
	}
}

LeftNav

<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="'idx_'+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="'idx_'+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_USER_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>

2.3.根据数据渲染页面

1.配置路由与路由路径的关系

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
    }]
  }]
})

在AppMain.js中显示组件就需要加上

<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>
 
<script>
  // 导入组件
  import TopNav from '@/components/TopNav.vue'
  import LeftNav from '@/components/LeftNav.vue'
 
  // 导出模块
  export default {
    components: {
      TopNav,LeftNav
    },data() {
      return {
        asideClass: "main-aside"
      }
    },
    created(){
      this.$root.Bus.$on('aaa',r=>{
        this.asideClass=r ? 'main-aside-collapsed':'main-aside';
      });
    }
  };
script>
<style scoped>
  .main-container {
    height: 100%;
    width: 100%;
    box-sizing: border-box;
  }
 
  .main-aside-collapsed {
    /* 在CSS中，通过对某一样式声明! important ，可以更改默认的CSS样式优先级规则，使该条样式属性声明具有最高优先级 */
    width: 64px !important;
    height: 100%;
    background-color: #334157;
    margin: 0px;
  }
 
  .main-aside {
    width: 240px !important;
    height: 100%;
    background-color: #334157;
    margin: 0px;
  }
 
  .main-header,
  .main-center {
    padding: 0px;
    border-left: 2px solid #333;
  }
style>

3.分页

后台

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);
        }
    }
}

前台

<template>
	<div class="books" style="padding: 20px;">
		<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-form-item>
			<el-form-item>
				<el-button type="primary" @click="onSubmit">查询el-button>
			el-form-item>
		el-form>


		<el-table :data="tableData" stripe style="width: 100%">
			<el-table-column prop="id" label="书籍编号" width="180">
			el-table-column>
			<el-table-column prop="bookname" label="书籍名称" width="180">
			el-table-column>
			<el-table-column prop="price" label="价格">
			el-table-column>
			<el-table-column prop="booktype" label="书籍类别">
			el-table-column>

		el-table>

		<span class="demonstration">完整功能span>
		<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>

template>

<script>
	export default {
		data() {
			return {
				bookname: '',
				tableData: [],
				rows:10,
				total:0,
				page:1,
			}
		},
		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);

			},
			handleSizeChange(r){
				let params = {
					bookname: this.bookname,
					rows:r,
					page:this.page
				}
				this.query(params);
			},
			handleCurrentChange(p){
				let params = {
					bookname: this.bookname,
					rows:this.rows,
					page:p
				}
				this.query(params);
			}
			
		},
		created() {
			this.query({});
			
		}
	}
script>

<style>
style>