【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：

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:

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

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> queryBookPager(Book book, HttpServletRequest req){
        try {
            PageBean pageBean=new PageBean();
            pageBean.setRequest(req);
            List 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 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

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:

 BookList.vue:

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> queryBookPager(Book book, HttpServletRequest req){
        try {
            PageBean pageBean=new PageBean();
            pageBean.setRequest(req);
            List 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：

效果图：