定时任务的五种创建方式，你都会么？
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来源：blog.csdn.net/qq_41463655/article/details/100839629文章源自JAVA秀-https://www.javaxiu.com/29309.html
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Quartz表达式生成地址：http://cron.qqe2.com/文章源自JAVA秀-https://www.javaxiu.com/29309.html
支持生成定时任务表达式和反解析，使用Quartz表达式的定时任务如下文章源自JAVA秀-https://www.javaxiu.com/29309.html
xxl-job文章源自JAVA秀-https://www.javaxiu.com/29309.html
springboot 的 @Scheduled文章源自JAVA秀-https://www.javaxiu.com/29309.html
Quartz 框架文章源自JAVA秀-https://www.javaxiu.com/29309.html
一、job 定时任务的五种创建方式
1、使用线程创建 job 定时任务文章源自JAVA秀-https://www.javaxiu.com/29309.html
/** * TODO 使用线程创建 job 定时任务 * @author 王松 */public class JobThread { public static class Demo01 { static long count = 0; public static void main(String[] args) { Runnable runnable = new Runnable() { @Override public void run() { while (true) { try { Thread.sleep(1000); count++; System.out.println(count); } catch (Exception e) { // TODO: handle exception } } } }; Thread thread = new Thread(runnable); thread.start(); } }}2、使用 TimerTask 创建job定时任务文章源自JAVA秀-https://www.javaxiu.com/29309.html
/** * TODO 使用 TimerTask 创建job定时任务 * @author 王松 */public class JobTimerTask { static long count = 0; public static void main(String[] args) { TimerTask timerTask = new TimerTask() { @Override public void run() { count++; System.out.println(count); } }; //创建timer对象设置间隔时间 Timer timer = new Timer(); // 间隔天数 long delay = 0; // 间隔毫秒数 long period = 1000; timer.scheduleAtFixedRate(timerTask, delay, period); }}3、使用线程池创建 job定时任务文章源自JAVA秀-https://www.javaxiu.com/29309.html
/** * TODO 使用线程池创建 job定时任务 * @author 王松 */public class JobScheduledExecutorService { public static void main(String[] args) { Runnable runnable = new Runnable() { @Override public void run() { // task to run goes here System.out.println("Hello !!"); } }; ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor(); // 第二个参数为首次执行的延时时间，第三个参数为定时执行的间隔时间 service.scheduleAtFixedRate(runnable, 1, 1, TimeUnit.SECONDS); }}4.Quartz 框架文章源自JAVA秀-https://www.javaxiu.com/29309.html
1.引入maven依赖文章源自JAVA秀-https://www.javaxiu.com/29309.html
<dependencies> <!-- quartz --> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz-jobs</artifactId> <version>2.2.1</version> </dependency></dependencies>2.任务调度类文章源自JAVA秀-https://www.javaxiu.com/29309.html
public class MyJob implements Job { @Override public void execute(JobExecutionContext context) throws JobExecutionException { System.out.println("quartz MyJob date:" + System.currentTimeMillis()); }}3.启动类文章源自JAVA秀-https://www.javaxiu.com/29309.html
public class JobQuartz { public static void main(String[] args) throws SchedulerException { //1.创建Scheduler的工厂 SchedulerFactory sf = new StdSchedulerFactory(); //2.从工厂中获取调度器实例 Scheduler scheduler = sf.getScheduler(); //3.创建JobDetail， JobDetail jb = JobBuilder.newJob(MyJob.class) //job的描述 .withDescription("this is a ram job") //job 的name和group .withIdentity("ramJob", "ramGroup") .build(); //任务运行的时间，SimpleSchedle类型触发器有效，3秒后启动任务 long time= System.currentTimeMillis() + 3*1000L; Date statTime = new Date(time); //4.创建Trigger //使用SimpleScheduleBuilder或者CronScheduleBuilder Trigger t = TriggerBuilder.newTrigger() .withDescription("") .withIdentity("ramTrigger", "ramTriggerGroup") //.withSchedule(SimpleScheduleBuilder.simpleSchedule()) //默认当前时间启动 .startAt(statTime) //两秒执行一次，Quartz表达式，支持各种牛逼表达式 .withSchedule(CronScheduleBuilder.cronSchedule("0/2 * * * * ?")) .build(); //5.注册任务和定时器 scheduler.scheduleJob(jb, t); //6.启动 调度器 scheduler.start(); }\5. springboot 的 @Scheduled 注解文章源自JAVA秀-https://www.javaxiu.com/29309.html
@Component@Configuration //1.主要用于标记配置类，兼备Component的效果。@EnableScheduling // 2.开启定时任务public class SaticScheduleTask { @Scheduled(cron = "0/5 * * * * ?") //3.添加定时任务 //@Scheduled(fixedRate=5000) //或直接指定时间间隔，例如：5秒 private void configureTasks() { System.err.println("执行静态定时任务时间: " + LocalDateTime.now()); }}二、xxl-job 任务调度后台 Admin
xxl-job 有什么用？文章源自JAVA秀-https://www.javaxiu.com/29309.html
分布式集群的情况下，保证定时任务不被重复执行。文章源自JAVA秀-https://www.javaxiu.com/29309.html
执行原理同Nginx 类型，所有定时任务通过任务调度平台分发，也可配置负载均衡等等文章源自JAVA秀-https://www.javaxiu.com/29309.html
首先让我们能够使用起来，搭建一个自己的任务文章源自JAVA秀-https://www.javaxiu.com/29309.html
第一步: github下载源码导入文章源自JAVA秀-https://www.javaxiu.com/29309.html
下载地址：https://github.com/xuxueli/xxl-job/文章源自JAVA秀-https://www.javaxiu.com/29309.html
当前版本目录结构 2.1.1文章源自JAVA秀-https://www.javaxiu.com/29309.html
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第二步: 执行sql文章源自JAVA秀-https://www.javaxiu.com/29309.html
文件地址：xxl-job/doc/db/tables_xxl_job.sql文章源自JAVA秀-https://www.javaxiu.com/29309.html
当前2.1.1版本sql文章源自JAVA秀-https://www.javaxiu.com/29309.html
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第三步: 修改xxl-job-admin项目配置文章源自JAVA秀-https://www.javaxiu.com/29309.html
配置文件：application.properties文章源自JAVA秀-https://www.javaxiu.com/29309.html
修改数据库连接文章源自JAVA秀-https://www.javaxiu.com/29309.html
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第四步: 启动admin项目文章源自JAVA秀-https://www.javaxiu.com/29309.html
springboot 方式启动项目，文章源自JAVA秀-https://www.javaxiu.com/29309.html
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访问 http://localhost:8080/xxl-job-admin/文章源自JAVA秀-https://www.javaxiu.com/29309.html
账号密码：admin / 123456文章源自JAVA秀-https://www.javaxiu.com/29309.html
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任务调度中心就搭建好了文章源自JAVA秀-https://www.javaxiu.com/29309.html
接下来需要创建一个服务器连接任务调度中心文章源自JAVA秀-https://www.javaxiu.com/29309.html
三、自创建boot项目的任务xxl-job 示例demo
创建一个 boot 项目文章源自JAVA秀-https://www.javaxiu.com/29309.html
我的目录结构文章源自JAVA秀-https://www.javaxiu.com/29309.html
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pom.xml文章源自JAVA秀-https://www.javaxiu.com/29309.html
web核心及 xxl-job-core文章源自JAVA秀-https://www.javaxiu.com/29309.html
<!-- spring-boot-starter-web (spring-webmvc + tomcat) --><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope></dependency><!-- xxl-job-core 版本号根据自己下载的版本修改 --><dependency> <groupId>com.xuxueli</groupId> <artifactId>xxl-job-core</artifactId> <version>2.1.1-SNAPSHOT</version></dependency>logback.xml文章源自JAVA秀-https://www.javaxiu.com/29309.html
日志配置直接拷贝文章源自JAVA秀-https://www.javaxiu.com/29309.html
<?xml version="1.0" encoding="UTF-8"?><configuration debug="false" scan="true" scanPeriod="1 seconds"> <contextName>logback</contextName> <property name="log.path" value="/data/applogs/xxl-job/xxl-job-executor-sample-springboot.log"/> <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${log.path}</file> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${log.path}.%d{yyyy-MM-dd}.zip</fileNamePattern> </rollingPolicy> <encoder> <pattern>%date %level [%thread] %logger{36} [%file : %line] %msg%n </pattern> </encoder> </appender> <root level="info"> <appender-ref ref="console"/> <appender-ref ref="file"/> </root></configuration>application.properties 加入配置文章源自JAVA秀-https://www.javaxiu.com/29309.html
需修改或自定义文章源自JAVA秀-https://www.javaxiu.com/29309.html
xxl-job admin 地址文章源自JAVA秀-https://www.javaxiu.com/29309.html
xxl.job.executor.appname 自定义名称，后台配置必须对应文章源自JAVA秀-https://www.javaxiu.com/29309.html
xxl.job.executor.ip 当前电脑Ip，或部署项目的电脑Ip文章源自JAVA秀-https://www.javaxiu.com/29309.html
xxl.job.executor.port 端口文章源自JAVA秀-https://www.javaxiu.com/29309.html
# 端口号server.port=8081# 日志logging.config=classpath:logback.xml## xxl-job admin 地址，多个逗号分隔"xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin## xxl-job名称 || socket ip 当前项目部署的ip地址/本机ip || socket 端口号xxl.job.executor.appname=xxl-job-executor-samplexxl.job.executor.ip=192.168.43.153xxl.job.executor.port=9999## xxl-job, access tokenxxl.job.accessToken=## xxl-job log pathxxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler## xxl-job log retention daysxxl.job.executor.logretentiondays=-1添加boot配置类 XxlJobConfig文章源自JAVA秀-https://www.javaxiu.com/29309.html
package xxljob.config;import com.xxl.job.core.executor.impl.XxlJobSpringExecutor;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;/** * xxl-job xxljob.config */@SuppressWarnings("ALL")@Configurationpublic class XxlJobConfig { private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class); @Value("${xxl.job.admin.addresses}") private String adminAddresses; @Value("${xxl.job.executor.appname}") private String appName; @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("${xxl.job.executor.logretentiondays}") private int logRetentionDays; @Bean(initMethod = "start", destroyMethod = "destroy") public XxlJobSpringExecutor xxlJobExecutor() { logger.info(">>>>>>>>>>> xxl-job xxljob.config init."); XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor(); xxlJobSpringExecutor.setAdminAddresses(adminAddresses); xxlJobSpringExecutor.setAppName(appName); xxlJobSpringExecutor.setIp(ip); xxlJobSpringExecutor.setPort(port); xxlJobSpringExecutor.setAccessToken(accessToken); xxlJobSpringExecutor.setLogPath(logPath); xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays); System.err.println(ip+":"+port); return xxlJobSpringExecutor; } /** * 针对多网卡、容器内部署等情况，可借助 "spring-cloud-commons" 提供的 "InetUtils" 组件灵活定制注册IP； * * 1、引入依赖： * <dependency> * <groupId>org.springframework.cloud</groupId> * <artifactId>spring-cloud-commons</artifactId> * <version>${version}</version> * </dependency> * * 2、配置文件，或者容器启动变量 * spring.cloud.inetutils.preferred-networks: 'xxx.xxx.xxx.' * * 3、获取IP * String ip_ = inetUtils.findFirstNonLoopbackHostInfo().getIpAddress(); */}任务job文章源自JAVA秀-https://www.javaxiu.com/29309.html
@JobHandler(value="demoJobHandler")@Componentpublic class DemoJobHandler extends IJobHandler { static int count; @Override public ReturnT<String> execute(String param) throws Exception { System.out.println("执行job任务"+count++); return SUCCESS; }}admin 后台配置文章源自JAVA秀-https://www.javaxiu.com/29309.html
执行管理器下文章源自JAVA秀-https://www.javaxiu.com/29309.html
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任务管理下编辑任务文章源自JAVA秀-https://www.javaxiu.com/29309.html
定时规则生成：http://cron.qqe2.com/文章源自JAVA秀-https://www.javaxiu.com/29309.html
job任务名：@JobHandler注解值 >> 如:@JobHandler(value=“demoJobHandler”)文章源自JAVA秀-https://www.javaxiu.com/29309.html
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启动文章源自JAVA秀-https://www.javaxiu.com/29309.html
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这样就配置完成了文章源自JAVA秀-https://www.javaxiu.com/29309.html
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完成文章源自JAVA秀-https://www.javaxiu.com/29309.html
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