SpringBoot thymeleaf实现饼状图与柱形图流程介绍

时间:2022-12-02 披着星光的鲸鱼人气:0

今天给大家带来的是一个用SpringBoot + thymeleaf显示出饼状图和柱形图

首先我们先创建项目注意：创建SpringBoot项目时一定要联网不然会报错

项目创建好后我们首先对 application.yml 进行编译

#指定端口号
server:
port: 8888
#配置mysql数据源
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/nba?serverTimezone=Asia/Shanghai
username: root
password: root
#配置模板引擎 thymeleaf
thymeleaf:
mode: HTML5
cache: false
suffix: .html
prefix: classpath:/templates/
mybatis:
mapper-locations: classpath:/mapper/*.xml
type-aliases-package: com.bdqn.springboot #放包名

接下来我们写后端代码

mapper层

package com.bdqn.springbootexcel.mapper;
import com.bdqn.springbootexcel.pojo.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface UserMapper {
    @Select("select * from user")
    List<User> find();
    @Insert("insert into user ( name, age, sex) values ( #{name}, #{age}, #{sex})")
    int add(User user);
}

实体类

package com.bdqn.springbootexcel.pojo;
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;
@Data
public class User {
    @ExcelProperty(index = 0,value = "用户编号")
    private Integer id;
    @ExcelProperty(index = 1,value = "用户姓名")
    private String name;
    @ExcelProperty(index = 2,value = "用户年龄")
    private String age;
    @ExcelProperty(index = 3,value = "用户性别")
    private String sex;
}

现在编写最重要的前端代码

index.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <!--饼状图-->
    <div id="pie" style="width:800px;height:600px;"></div>
    <script th:src="@{https://cdn.bootcdn.net/ajax/libs/echarts/5.4.0/echarts.min.js}"></script>
    <script>
        option = {
            title: {
                text:'饼图示例',
                subtext:'纯属虚构',
                left:'center'
            },
            legend: {
                top: 'bottom'
            },
            tooltip:{
                trigger:'item'
            },
            toolbox: {
                show: true,
                feature: {
                    mark: { show: true },
                    dataView: { show: true, readOnly: false },
                    restore: { show: true },
                    saveAsImage: { show: true }
                }
            },
            series: [
                {
                    name: 'Nightingale Chart',
                    type: 'pie',
                    radius: [50, 250],
                    center: ['50%', '50%'],
                    roseType: 'area',
                    itemStyle: {
                        borderRadius: 8
                    },
                    data: [
                    ]
                }
            ]
        };
        var chartDom = document.getElementById('pie');
        var myChart = echarts.init(chartDom);
        fetch("/pojos_bing").then(response => response.json()).then(res => {
            res.forEach(item => {
                //name 和 age 都是数据库中的值
                option.series[0].data.push({name: item.name,value: item.age})
            })
            myChart.setOption(option);
        })
    </script>
    <!--柱状图-->
    <div style="height: 50px;"></div>
    <div id="bar" style="width: 1000px;height: 800px;"></div>
    <script>
        barOption = {
            title: {
                text: '柱状图'
            },
            legend: {
                top: 'top'
            },
            tooltip: {
                trigger: 'axis'
            },
            xAxis: {
                type: 'category',
                data: []
            },
            yAxis: {
                type: 'value'
            },
            series: [
                {
                    name: '11',
                    data: [],
                    type: 'bar'
                },
                {
                    name: '22',
                    data: [],
                    type: 'bar'
                }
            ]
        };
        var barDom = document.getElementById('bar');
        var barChart = echarts.init(barDom);
        fetch("/pojos_bing").then(response => response.json()).then(res => {
            //name 和 age 都是数据库中的值
            const name= res.map(v => v.name);
            barOption.xAxis.data = name
            const age= res.map(v => v.age);
            barOption.series[0].data = age
            barChart.setOption(barOption)
        })
    </script>
</body>
</html>

现在我们看看前端展示效果

加载全部内容