Java定時任務的五種創(chuàng)建方式，你都會么？
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xxl-job springboot 的 @Scheduled Quartz 框架
一、job 定時任務的五種創(chuàng)建方式
/**
* TODO 使用線程創(chuàng)建 job 定時任務
* @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();
}
}
}
/**
* TODO 使用 TimerTask 創(chuàng)建job定時任務
* @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);
}
};
//創(chuàng)建timer對象設置間隔時間
Timer timer = new Timer();
// 間隔天數
long delay = 0;
// 間隔毫秒數
long period = 1000;
timer.scheduleAtFixedRate(timerTask, delay, period);
}
}
/**
* TODO 使用線程池創(chuàng)建 job定時任務
* @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();
// 第二個參數為首次執(zhí)行的延時時間，第三個參數為定時執(zhí)行的間隔時間
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 {
@Override
public 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.創(chuàng)建Scheduler的工廠
SchedulerFactory sf = new StdSchedulerFactory();
//2.從工廠中獲取調度器實例
Scheduler scheduler = sf.getScheduler();
//3.創(chuàng)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();
//任務運行的時間，SimpleSchedle類型觸發(fā)器有效，3秒后啟動任務
long time= System.currentTimeMillis() + 3*1000L;
Date statTime = new Date(time);
//4.創(chuàng)建Trigger
//使用SimpleScheduleBuilder或者CronScheduleBuilder
Trigger t = TriggerBuilder.newTrigger()
.withDescription("")
.withIdentity("ramTrigger", "ramTriggerGroup")
//.withSchedule(SimpleScheduleBuilder.simpleSchedule())
//默認當前時間啟動
.startAt(statTime)
//兩秒執(zhí)行一次，Quartz表達式，支持各種牛逼表達式
.withSchedule(CronScheduleBuilder.cronSchedule("0/2 * * * * ?"))
.build();
//5.注冊任務和定時器
scheduler.scheduleJob(jb, t);
//6.啟動 調度器
scheduler.start();
}
@Component
@Configuration //1.主要用于標記配置類，兼?zhèn)銫omponent的效果。
@EnableScheduling // 2.開啟定時任務
public class SaticScheduleTask {
@Scheduled(cron = "0/5 * * * * ?") //3.添加定時任務
//@Scheduled(fixedRate=5000) //或直接指定時間間隔，例如：5秒
private void configureTasks() {
System.err.println("執(zhí)行靜態(tài)定時任務時間: " + LocalDateTime.now());
}
}
二、xxl-job 任務調度后臺 Admin
分布式集群的情況下，保證定時任務不被重復執(zhí)行。 執(zhí)行原理同Nginx 類型，所有定時任務通過任務調度平臺分發(fā)，也可配置負載均衡等等 首先讓我們能夠使用起來，搭建一個自己的任務
三、自創(chuàng)建boot項目的任務xxl-job 示例demo
<!-- 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 版本號根據自己下載的版本修改 -->
<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>
xxl-job admin 地址 xxl.job.executor.appname 自定義名稱，后臺配置必須對應 xxl.job.executor.ip 當前電腦Ip，或部署項目的電腦Ip xxl.job.executor.port 端口
# 端口號
server.port=8081
# 日志
logging.config=classpath:logback.xml
### xxl-job admin 地址，多個逗號分隔"
xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin
### xxl-job名稱 || socket ip 當前項目部署的ip地址/本機ip || socket 端口號
xxl.job.executor.appname=xxl-job-executor-sample
xxl.job.executor.ip=192.168.43.153
xxl.job.executor.port=9999
### xxl-job, access token
xxl.job.accessToken=
### xxl-job log path
xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler
### xxl-job log retention days
xxl.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")
@Configuration
public 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("${xxl.job.executor.logretentiondays}")
private int logRetentionDays;
@Bean(initMethod = "start", destroyMethod = "destroy")
public XxlJobSpringExecutor xxlJobExecutor() {
logger.info(">>>>>>>>>>> xxl-job xxljob.config init.");
XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();
xxlJobSpringExecutor.setAdminAddresses(adminAddresses);
xxlJobSpringExecutor.setAppName(appName);
xxlJobSpringExecutor.setIp(ip);
xxlJobSpringExecutor.setPort(port);
xxlJobSpringExecutor.setAccessToken(accessToken);
xxlJobSpringExecutor.setLogPath(logPath);
xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays);
System.err.println(ip+":"+port);
return xxlJobSpringExecutor;
}
/**
* 針對多網卡、容器內部署等情況，可借助 "spring-cloud-commons" 提供的 "InetUtils" 組件靈活定制注冊IP；
*
* 1、引入依賴：
* <dependency>
* <groupId>org.springframework.cloud</groupId>
* <artifactId>spring-cloud-commons</artifactId>
* <version>${version}</version>
* </dependency>
*
* 2、配置文件，或者容器啟動變量
* spring.cloud.inetutils.preferred-networks: 'xxx.xxx.xxx.'
*
* 3、獲取IP
* String ip_ = inetUtils.findFirstNonLoopbackHostInfo().getIpAddress();
*/
}
@JobHandler(value="demoJobHandler")
@Component
public class DemoJobHandler extends IJobHandler {
static int count;
@Override
public ReturnT<String> execute(String param) throws Exception {
System.out.println("執(zhí)行job任務"+count++);
return SUCCESS;
}
}
@JobHandler(value=“demoJobHandler”)
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