XXL-JOB中间件【实现分布式任务调度】

XXL-JOB是一个分布式任务调度平台，它能够管理任务的执行过程，提供了丰富的任务调度功能，如定时调度、分片广播任务、任务HA、任务日志、执行监控等。

以下是一个使用XXL-JOB实现分布式任务调度的简单示例：

1. 首先，需要在项目中引入XXL-JOB的依赖：

<dependency>
    <groupId>com.xuxueli</groupId>
    <artifactId>xxl-job-core</artifactId>
    <version>版本号</version>
</dependency>

2. 在项目的配置文件中配置XXL-JOB：

# xxl-job admin address list, such as "http://address" or "http://address01,http://address02"
xxl.job.admin.addresses=http://xxl-job-admin-address
 
# xxl-job executor appname
xxl.job.executor.appname=your-app-name
# xxl-job executor address
xxl.job.executor.ip=
# xxl-job executor port
xxl.job.executor.port=9999
# xxl-job access token
xxl.job.accessToken=
# xxl-job executor logpath
xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler
# xxl-job executor logretentiondays
xxl.job.executor.logretentiondays=

3. 创建任务执行类，实现org.springframework.stereotype.Component注解，并实现org.springframework.beans.factory.DisposableBean接口：

@Component
public class SampleXxlJob implements DisposableBean {
 
    private static final Logger logger = LoggerFactory.getLogger(SampleXxlJob.class);
 
    @XxlJob("demoJobHandler")
    public void execute() throws Exception {
        // do something
        logger.info("XXL-JOB execute start...");
        // your business code
        logger.info("XXL-JOB execute end.");
    }
 
    @Override
    public void destroy() throws Exception {
        // do something
    }
}

在上述代码中，@XxlJob("demoJobHandler")注解表示该方法是一个XXL-JOB的任务处理器，"demoJobHandler"是在XXL-JOB管理平台中注册的任务名称。

4. 在启动类中配置任务执行器：

@SpringBootApplication
public class Application {
 
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
 
    @Bean
    public XxlJobSpringExecutor xxlJobExecutor() {
        XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();
        xxlJobSpringExecutor.setAdminAddresses(PropertyUtil.getProperty("xxl.job.admin.addresses"));
        xxlJobSpringExecutor.setAppName(PropertyUtil.getProperty("xxl.job.executor.appname"));
        xxlJobSpringExecutor.setIp(PropertyUtil.getProperty("xxl.job.executor.ip"));
        xxlJobSpringExecutor.setPort(Integer.valueOf(PropertyUtil.getProperty("xxl.job.executor.port")));
        xxlJobSpringExecutor.setAccessToken(PropertyUtil.getProperty("xxl.j