Spring Boot 3 整合 xxl-job 实现分布式定时任务调度，结合 Docker 容器化部署（图文指南）

整合Spring Boot 3和xxl-job实现分布式定时任务调度，并结合Docker进行容器化部署，可以参考以下步骤：

1. 使用Maven或Gradle创建Spring Boot项目，并添加xxl-job的依赖。

<!-- 以Maven为例，添加xxl-job的依赖 -->
<dependency>
    <groupId>com.xuxueli</groupId>
    <artifactId>xxl-job-core</artifactId>
    <version>版本号</version>
</dependency>

2. 在Spring Boot项目中配置xxl-job。

@Configuration
public class XxlJobConfig {
 
    @Value("${xxl.job.admin.addres}")
    private String adminAddresses;
 
    @Value("${xxl.job.executor.ip}")
    private String ip;
 
    @Value("${xxl.job.executor.port}")
    private int port;
 
    @Value("${xxl.job.accessToken}")
    private String accessToken;
 
    @Value("${xxl.job.executor.logpath}")
    private String logPath;
 
    @Value("${xxl.job.executor.logretentiondays}")
    private int logRetentionDays;
 
    @Bean
    public XxlJobExecutor xxlJobExecutor() {
        XxlJobExecutor xxlJobExecutor = new XxlJobExecutor();
        // 配置管理地址
        xxlJobExecutor.setAdminAddresses(adminAddresses);
        // 执行器IP
        xxlJobExecutor.setIp(ip);
        // 执行器端口
        xxlJobExecutor.setPort(port);
        // 访问令牌
        xxlJobExecutor.setAccessToken(accessToken);
        // 日志文件保存地址
        xxlJobExecutor.setLogPath(logPath);
        // 日志保留天数
        xxlJobExecutor.setLogRetentionDays(logRetentionDays);
        return xxlJobExecutor;
    }
}

3. 创建定时任务处理类，实现JobHandler接口。

@Component
public class SampleXxlJob implements JobHandler {
    @Override
    public void execute(String param) throws Exception {
        // 任务逻辑
        System.out.println("执行分布式定时任务...");
    }
}

4. 在application.properties或application.yml中配置xxl-job相关属性。

# xxl-job admin address list, such as "http://address" or "http://address01,http://address02"
xxl.job.admin.addresses=http://xxl-job-admin-url
# executor address
xxl.job.executor.ip=
xxl.job.executor.port=9999
# executor log path
xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler
# executor log retention days
xxl.job.executor.logretentiondays=30
# access token
xxl.job.accessToken=
# executor registry center span
xxl.job.executor.registry.retry=30

5. 使用Dockerfile构建Docker镜像并结合Docker Compose进行容器化部署。

FROM openjdk:17-slim
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

version: '3.8'
services:
  xxl-job-executor:
    build:
      context