How SpringBoot+thymeleaf+Echarts+Mysql realizes visual data reading

Achieve data visualization by getting data from the database, converting it to JSON data, and returning it to the front-end interface.

Data visualization test

##Implementation process

1. pom.xml

pom.xml introduction (only required for the example in this article, other dependencies are imported by yourself)

<!--Thymeleaf整合security-->
<dependency>
    <groupId>org.thymeleaf.extras</groupId>
    <artifactId>thymeleaf-extras-springsecurity5</artifactId>
    <version>3.0.4.RELEASE</version>
</dependency>
 <!--导入lombok小辣椒驱动依赖,用来生成get/set方法依赖-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <!--<optional>true</optional>-->
    <version>1.18.12</version>
    <scope>provided</scope><!--自动生成有参无参构造-->
</dependency>
<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.4</version>
 </dependency>

2. Backend program example

1. Controller layer

package com.dvms.controller;

/*
 *文件名: DataviewController
 *创建者: CJW
 *创建时间:2022/4/15 20:33
 *描述: TODO
 */


import com.alibaba.fastjson.JSON;
import com.dvms.service.ParamoduleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.ArrayList;

@Controller
public class DataviewController {

    @Autowired
    private ParamoduleService paramoduleService;

    // 查出
    @RequestMapping("/data/todatashow")
    public String finddata(ModelMap model){
    
        ArrayList<String> dataname = paramoduleService.finddata();
        ArrayList<Integer> datanum = paramoduleService.finddatanum();

        String datanameJson = JSON.toJSONString(dataname);
        String datanumJson = JSON.toJSONString(datanum);

        System.out.println(datanameJson);
        System.out.println(datanumJson);

        model.put("datanameJson",datanameJson);
        model.put("datanumJson",datanumJson);


        return "ems/charts";
    }
}

2. Service layer

package com.dvms.service;

import com.dvms.entity.Record;
import com.dvms.entity.Video;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/*
 *文件名: ParamoduleService
 *创建者: CJW
 *创建时间:2022/1/15 10:54
 *描述: TODO
 */
public interface ParamoduleService {

    ArrayList<String> finddata();

    ArrayList<Integer> finddatanum();
}

3. ServiceImpl layer

package com.dvms.service.Impl;

import com.dvms.dao.ParamoduleDao;
import com.dvms.entity.Record;
import com.dvms.entity.Video;
import com.dvms.service.ParamoduleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

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

/*
 *文件名: ParamoduleServiceImpl
 *创建者: CJW
 *创建时间:2022/1/15 10:55
 *描述: TODO
 */
@Service
public class ParamoduleServiceImpl implements ParamoduleService {

    @Autowired
    private ParamoduleDao paramoduleDao;
    //查出数据名
    @Override
    public ArrayList<String> finddata(){ return paramoduleDao.finddata(); }
    //查出数据数量
    @Override
    public ArrayList<Integer> finddatanum(){ return paramoduleDao.finddatanum(); }
}

4. entity layer

package com.dvms.entity;

/*
 *文件名: Data
 *创建者: CJW
 *创建时间:2022/4/14 16:17
 *描述: TODO
 */

import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;
import lombok.ToString;
import lombok.experimental.Accessors;

@lombok.Data
@ToString
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true) //链式调用

public class Data {

    private String id;
    private String dataname;
    private Integer datanum;

}

5. dao(pojo) layer

package com.dvms.dao;

import com.dvms.entity.Record;
import com.dvms.entity.Video;
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/*
 *文件名: ParamoduleDao
 *创建者: CJW
 *创建时间:2022/1/15 10:52
 *描述: TODO
 */

@Repository
public interface ParamoduleDao {

     ArrayList<String> finddata();

     ArrayList<Integer> finddatanum();

}

6 . daoMapper layer

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dvms.dao.ParamoduleDao">

    <!--查询数据名-->
    <select id="finddata" resultType="String">
        select dataname from data
    </select>

    <!--查询数据数量-->
    <select id="finddatanum" resultType="Integer">
        select datanum from data
    </select>
    
</mapper>

7. Database data table

3. Front-end program example

Front-end introduction:

	<script src="https://cdn.bootcss.com/echarts/4.6.0/echarts.min.js">
	<html lang="en" xmlns:th="http://www.thymeleaf.org"></script>

Shows part of the front-end program, mainly the following two sentences:

var datanum=[[${datanumJson}]]; // thymeleaf 获取后端参数方式

JSON.parse(dataname)  // JSON接收数据

		<div class="main">
			<!-- MAIN CONTENT -->
			<div class="main-content">
				<div class="container-fluid">
					<h4 id="数据可视化测试示例">数据可视化测试示例</h4>
					<div class="row">
						<div class="col-md-12">
							<div class="panel">
								<div class="panel-heading">
									<h4 id="读取数据库数据可视化示例">读取数据库数据可视化示例</h4>
                                    <div class="right">
                                        <button type="button" class="btn-toggle-collapse"><i class="lnr lnr-chevron-up"></i>
                                        </button>
                                        <button type="button" class="btn-remove"><i class="lnr lnr-cross"></i></button>
                                    </div>
								</div>
								<div class="panel-body">
									<!--<div id="demo-line-chart" class="ct-chart"></div>-->
									<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
								<div class="col-md-6" id="main" >
                                    <script type="text/javascript" th:inline="javascript">

                                        //在js读取thymeleaf变量值
                                        var dataname=[[${datanameJson}]];
                                        var datanum=[[${datanumJson}]];


                                        // 基于准备好的dom，初始化echarts实例
                                        var myChart = echarts.init(document.getElementById(&#39;main&#39;));
                                        // 指定图表的配置项和数据
                                        var option = {
                                            title: {
                                                text: &#39;读取数据库数据可视化示例&#39;
                                            },
                                            tooltip: {},
                                            legend: {
                                                data: [&#39;数量&#39;]
                                            },
                                            xAxis: {
                                                data: JSON.parse(dataname)
                                            },
                                            yAxis: {},
                                            color:[&#39;#62d1de&#39;],//在这里设置colorList，是一个数组，图片颜色会按顺序选取
                                            series: [
                                                {
                                                    name: &#39;数量&#39;,
                                                    type: &#39;bar&#39;,
                                                    data: JSON.parse(datanum)
                                                }
                                            ]
                                        };


                                        // 使用刚指定的配置项和数据显示图表。
                                        myChart.setOption(option);
                                    </script>

                                </div>

                                <div class="col-md-6" id="main1" >

                                    <script type="text/javascript" th:inline="javascript">


                                        // 基于准备好的dom，初始化echarts实例
                                        var myChart1 = echarts.init(document.getElementById(&#39;main1&#39;));
                                        option = {
                                            title: {
                                                text: &#39;某站点用户访问来源&#39;,
                                                subtext: &#39;纯属虚构&#39;,
                                                left: &#39;center&#39;
                                            },
                                            tooltip: {
                                                trigger: &#39;item&#39;,
                                                formatter: &#39;{a} <br/>{b} : {c} ({d}%)&#39;
                                            },
                                            legend: {
                                                orient: &#39;vertical&#39;,
                                                left: &#39;left&#39;,
                                                data: [&#39;直接访问&#39;, &#39;邮件营销&#39;, &#39;联盟广告&#39;, &#39;视频广告&#39;, &#39;搜索引擎&#39;]
                                            },
                                            color:[&#39;#62d1de&#39;,&#39;#54d6b6&#39;,&#39;#a6db69&#39;,&#39;#ffd454&#39;,&#39;#ffa361&#39;,&#39;#d1d1d1&#39;],//在这里设置colorList，是一个数组，图片颜色会按顺序选取
                                            series: [
                                                {
                                                    name: &#39;访问来源&#39;,
                                                    type: &#39;pie&#39;,
                                                    radius: &#39;55%&#39;,
                                                    center: [&#39;50%&#39;, &#39;60%&#39;],
                                                    data: [
                                                        {value: 335, name: &#39;直接访问&#39;},
                                                        {value: 310, name: &#39;邮件营销&#39;},
                                                        {value: 234, name: &#39;联盟广告&#39;},
                                                        {value: 135, name: &#39;视频广告&#39;},
                                                        {value: 1548, name: &#39;搜索引擎&#39;}
                                                    ],
                                                    emphasis: {
                                                        itemStyle: {
                                                            shadowBlur: 10,
                                                            shadowOffsetX: 0,
                                                            shadowColor: &#39;rgba(0, 0, 0, 0.5)&#39;
                                                        }
                                                    }
                                                }
                                            ]
                                        };

                                        // 使用刚指定的配置项和数据显示图表。
                                        myChart1.setOption(option);
                                    </script>
                                </div>
								</div>
                            </div>
							</div>
						</div>
								</div>
							</div>
						</div>
			<!-- END MAIN CONTENT -->
		</div>

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