万万没想到（java如何做定时任务）java怎么做定时任务，Java如何设置定时任务？，java定时任务时间设置，

/*** 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() {@Overridepublic 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();}}}

/*** 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() {@Overridepublic 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);}}

/*** 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() {@Overridepublic void run() {// task to run goes hereSystem.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);}}

<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>

public class MyJob implements Job {@Overridepublic void execute(JobExecutionContext context) throws JobExecutionException {System.out.println("quartz MyJob date:" + System.currentTimeMillis());}}

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CronScheduleBuilderTrigger 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();}

@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());}}

<!-- 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>

<?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>

# 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

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();*/}

@JobHandler(value="demoJobHandler")@Componentpublic class DemoJobHandler extends IJobHandler {staticint count;@Overridepublic ReturnT<String> execute(String param) throws Exception {System.out.println("执行job任务"+count++);return SUCCESS;}}

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