ElementUI动态树，数据表格以及分页的实现

前言

一. ElementUI动态树

二. 数据表格和分页

三. 后端代码

service层

controller层

前言

在上一篇博客中实现了左侧菜单栏，在此基础上将它变为动态的，即动态的展示数据库的数据。还有数据表格的实现以及分页。（纯代码分享）

ElementUI官网https://element.eleme.cn/#/zh-CN/component/pagination

一. ElementUI动态树

LeftNav.vue

<template>
  <el-menu router :default-active="$route.path" default-active="2" class="el-menu-vertical-demo" background-color="#334157" text-color="#fff"
    active-text-color="#ffd04b" :collapse="collapsed">
    <div class="logobox">
      <img class="logoimg" src="../assets/img/logo.png" alt="">
    </div>
    <el-submenu v-for="m in menus" :index="'idx_'+m.id" :key="'key'+m.id">
      <template slot="title">
        <i :class="m.icon"></i>
        <span>{{m.text}}</span>
      </template>
      <el-menu-item v-for="m2 in m.modules" :index="m2.url" :key="'key'+m2.id">
        <i :class="m2.icon"></i>
        <span>{{m2.text}}</span>
      </el-menu-item>
    </el-submenu>
  </el-menu>
</template>
<script>
  export default {
    data() {
      return {
        collapsed: false,
        menus: []
      }
    },
    created() {
      this.$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>

index.js

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
        }
      ]
    }
  ]
})

action.js

/**
 * 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_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];
	}
}

展示效果：

二. 数据表格和分页

BookList.vue

<template>
  <div class="books" style="padding: 20px;">
    <!-- 搜索框 -->
    <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" @click="onSubmit">查询</el-button>
      </el-form-item>
    </el-form>
    <!-- 数据表格 -->
    <template>
      <el-table
        :data="tableData"
        border
        style="width: 100%">
        <el-table-column
          prop="id"
          label="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="书籍价格">
        </el-table-column>
        <el-table-column
          prop="booktype"
          label="书籍类别">
        </el-table-column>
      </el-table>
    </template>
    <!-- 分页 -->
     <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:[],
        page:1,
        rows:10,
        total:0
      }
    },
    methods:{
      // 当前页大小
      handleSizeChange(r){
        let params = {
          bookname : this.bookname,
          rows : r,
          page : this.page
        }
        this.query(params);
        // 当前页码
      },handleCurrentChange(p){
        let params = {
          bookname : this.bookname,
          rows : this.rows,
          page : p
        }
        this.query(params);
      },
      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);
      }
    },
    created() {
      this.query({});
    }
  }
</script>

<style>
</style>

action.js

'BOOK_LIST': '/book/queryBookPager', //数据表格

展示效果：

三. 后端代码

service层

IModuleService

package com.zking.ssm.service;

import com.zking.ssm.model.Module;
import com.zking.ssm.model.RoleModule;
import com.zking.ssm.model.TreeNode;
import com.zking.ssm.vo.RoleModuleVo;
import org.springframework.stereotype.Repository;

import java.util.List;

public interface IModuleService {

    List<Module> queryRootNode(Integer id);

    List<TreeNode> queryTreeNode(Integer id);

    int addRoleModule(RoleModule roleModule);

    List<String> queryModuleByRoleId(RoleModule roleModule);
}

ModuleServiceImpl

package com.zking.ssm.service.impl;

import com.zking.ssm.mapper.ModuleMapper;
import com.zking.ssm.mapper.RoleModuleMapper;
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.vo.RoleModuleVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class ModuleServiceImpl implements IModuleService {

    @Autowired
    private ModuleMapper moduleMapper;

    @Autowired
    private RoleModuleMapper roleModuleMapper;

    @Override
    public List<Module> queryRootNode(Integer id) {
        return moduleMapper.queryChildNodeByPid(id);
    }

    @Override
    public List<TreeNode> queryTreeNode(Integer id) {
        return moduleMapper.queryTreeNodeByPid(id);
    }

    @Override
    public int addRoleModule(RoleModule roleModule) {
        roleModuleMapper.deleteRoleModule(roleModule);
        roleModuleMapper.insertRoleModule(roleModule);
        return 1;
    }

    @Override
    public List<String> queryModuleByRoleId(RoleModule roleModule) {
        return roleModuleMapper.queryModuleByRoleId(roleModule);
    }
}

IBookService

package com.zking.ssm.service;

import com.zking.ssm.model.Book;
import com.zking.ssm.util.PageBean;

import java.util.List;
import java.util.Map;

public interface IBookService {
    int deleteByPrimaryKey(Integer id);

    int insert(Book record);

    Book selectByPrimaryKey(Integer id);

    int updateByPrimaryKey(Book record);

    List<Book> queryBookPager(Book book, PageBean pageBean);

    Map<String,Object> queryBookCharts();
}

BookServiceImpl

package com.zking.ssm.service.impl;

import com.zking.ssm.mapper.BookMapper;
import com.zking.ssm.model.Book;
import com.zking.ssm.service.IBookService;
import com.zking.ssm.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

@Service
public class BookServiceImpl implements IBookService {

    @Autowired
    private BookMapper bookMapper;

    @Override
    public int deleteByPrimaryKey(Integer id) {
        return bookMapper.deleteByPrimaryKey(id);
    }

    @Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }

    @Override
    public Book selectByPrimaryKey(Integer id) {
        return bookMapper.selectByPrimaryKey(id);
    }

    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }

    @Override
    public List<Book> queryBookPager(Book book, PageBean pageBean) {
        return bookMapper.queryBookPager(book);
    }

    @Override
    public Map<String, Object> queryBookCharts() {
        return bookMapper.queryBookCharts();
    }
}

controller层

ModuleController

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);
        }
    }
}

BookController

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);
        }
    }
}