jframe生成柱状图片+图片垂直合并+钉钉机器人推送

需求：

        后端根据数据自动生成2个图片，然后把两张图片合并成一张图片，再发到钉钉群里，涉及到定时生成和推送，当时我们测试同事说他们写定时脚本放到服务器上，然后让我提供生成图片的方法和钉钉机器人的逻辑

天下文字一大抄，集各位大佬精华，最后成果如下

依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>imagedemo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
 
        <!--柱状图制作引入-->
        <dependency>
            <groupId>org.jfree</groupId>
            <artifactId>jfreechart</artifactId>
            <version>1.0.19</version>
        </dependency>
 
        <!--oss引入-->
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
            <version>3.15.1</version>
        </dependency>
 
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.22</version>
        </dependency>
 
        <!--钉钉机器人引入-->
        <dependency>
            <groupId>com.aliyun</groupId>
            <artifactId>alibaba-dingtalk-service-sdk</artifactId>
            <version>2.0.0</version>
        </dependency>
 
        <!--常用工具类-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.20</version>
        </dependency>
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
 
</project>

配置  

server:
  port: 9111
 
#oss配置
aliyun:
  oss:
    enable: true
    name: alioss
    accessKey: xxx
    secretKey: xxx
    bucketName: xxx
    endpoint: xxx
    pathPrefix: xxx                  #生成图片所在的文件夹
#钉钉机器人
sys:
  pe:
    dingtalk:
      robotMsgUrl: xxxurl
      secret: xxx

配置类 

package com.example.demo.config;
 
 
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
@Data
@Component
@ConfigurationProperties(prefix = "sys.pe.dingtalk")
public class DingTalkConfig {
    private String robotMsgUrl;  //系统预警机器人推送群地址
    private String secret;  //系统预警机器人推送群地址
}

package com.example.demo.config;
 
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
@Data
@Component
@ConfigurationProperties(prefix = "aliyun.oss")
public class OssConfig {
 
    private String endpoint;
 
    private String accessKey;
 
    private String secretKey;
 
    private String bucketName;  //桶名称
 
    private String pathPrefix;   //生成文件路径前缀
 
}

module【除serie外，另外一个根据自己需求自行确定是否要用】 

package com.example.demo.model;
 
import java.io.Serializable;
import java.util.Vector;
 
/**
 * @author zsl0
 * created on 2023/7/6 17:51
 */
public class Serie implements Serializable {
 
    private static final long serialVersionUID = 1L;
    private String name;// 名字
    private Vector