摘要：由于工作上的原因，需要進(jìn)行定時(shí)任務(wù)的動(dòng)態(tài)增刪改查，網(wǎng)上大部分資料都是整合框架實(shí)現(xiàn)的。本人查閱了一些資料，發(fā)現(xiàn)本身就支持實(shí)現(xiàn)定時(shí)任務(wù)的動(dòng)態(tài)控制。

由于工作上的原因，需要進(jìn)行定時(shí)任務(wù)的動(dòng)態(tài)增刪改查，網(wǎng)上大部分資料都是整合quertz框架實(shí)現(xiàn)的。本人查閱了一些資料，發(fā)現(xiàn)springBoot本身就支持實(shí)現(xiàn)定時(shí)任務(wù)的動(dòng)態(tài)控制。并進(jìn)行改進(jìn)，現(xiàn)支持任意多參數(shù)定時(shí)任務(wù)配置

實(shí)現(xiàn)結(jié)果如下圖所示：

后臺(tái)測(cè)試顯示如下：

github 簡(jiǎn)單demo地址如下：
springboot-dynamic-task

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

/**
 * @program: simple-demo
 * @description: 定時(shí)任務(wù)配置類
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Configuration
public class SchedulingConfig {
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        // 定時(shí)任務(wù)執(zhí)行線程池核心線程數(shù)
        taskScheduler.setPoolSize(4);
        taskScheduler.setRemoveOnCancelPolicy(true);
        taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-");
        return taskScheduler;
    }
}

這個(gè)類包含了新增定時(shí)任務(wù)，移除定時(shí)任務(wù)等等核心功能方法

import com.caotinging.demo.task.ScheduledTask;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.config.CronTask;
import org.springframework.stereotype.Component;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @program: simple-demo
 * @description: 添加定時(shí)任務(wù)注冊(cè)類，用來(lái)增加、刪除定時(shí)任務(wù)。
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Component
public class CronTaskRegistrar implements DisposableBean {

    private final Map scheduledTasks = new ConcurrentHashMap<>(16);

    @Autowired
    private TaskScheduler taskScheduler;

    public TaskScheduler getScheduler() {
        return this.taskScheduler;
    }

    /**
     * 新增定時(shí)任務(wù)
     * @param task
     * @param cronExpression
     */
    public void addCronTask(Runnable task, String cronExpression) {
        addCronTask(new CronTask(task, cronExpression));
    }

    public void addCronTask(CronTask cronTask) {
        if (cronTask != null) {
            Runnable task = cronTask.getRunnable();
            if (this.scheduledTasks.containsKey(task)) {
                removeCronTask(task);
            }

            this.scheduledTasks.put(task, scheduleCronTask(cronTask));
        }
    }

    /**
     * 移除定時(shí)任務(wù)
     * @param task
     */
    public void removeCronTask(Runnable task) {
        ScheduledTask scheduledTask = this.scheduledTasks.remove(task);
        if (scheduledTask != null)
            scheduledTask.cancel();
    }

    public ScheduledTask scheduleCronTask(CronTask cronTask) {
        ScheduledTask scheduledTask = new ScheduledTask();
        scheduledTask.future = this.taskScheduler.schedule(cronTask.getRunnable(), cronTask.getTrigger());

        return scheduledTask;
    }


    @Override
    public void destroy() {
        for (ScheduledTask task : this.scheduledTasks.values()) {
            task.cancel();
        }
        this.scheduledTasks.clear();
    }
}

import com.caotinging.demo.utils.SpringContextUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Method;
import java.util.Objects;

/**
 * @program: simple-demo
 * @description: 定時(shí)任務(wù)運(yùn)行類
 * @author: CaoTing
 * @date: 2019/5/23
 **/
public class SchedulingRunnable implements Runnable {

    private static final Logger logger = LoggerFactory.getLogger(SchedulingRunnable.class);

    private String beanName;

    private String methodName;

    private Object[] params;

    public SchedulingRunnable(String beanName, String methodName) {
        this(beanName, methodName, null);
    }

    public SchedulingRunnable(String beanName, String methodName, Object...params ) {
        this.beanName = beanName;
        this.methodName = methodName;
        this.params = params;
    }

    @Override
    public void run() {
        logger.info("定時(shí)任務(wù)開(kāi)始執(zhí)行 - bean：{}，方法：{}，參數(shù)：{}", beanName, methodName, params);
        long startTime = System.currentTimeMillis();

        try {
            Object target = SpringContextUtils.getBean(beanName);

            Method method = null;
            if (null != params && params.length > 0) {
                Class[] paramCls = new Class[params.length];
                for (int i = 0; i < params.length; i++) {
                    paramCls[i] = params[i].getClass();
                }
                method = target.getClass().getDeclaredMethod(methodName, paramCls);
            } else {
                method = target.getClass().getDeclaredMethod(methodName);
            }

            ReflectionUtils.makeAccessible(method);
            if (null != params && params.length > 0) {
                method.invoke(target, params);
            } else {
                method.invoke(target);
            }
        } catch (Exception ex) {
            logger.error(String.format("定時(shí)任務(wù)執(zhí)行異常 - bean：%s，方法：%s，參數(shù)：%s ", beanName, methodName, params), ex);
        }

        long times = System.currentTimeMillis() - startTime;
        logger.info("定時(shí)任務(wù)執(zhí)行結(jié)束 - bean：{}，方法：{}，參數(shù)：{}，耗時(shí)：{} 毫秒", beanName, methodName, params, times);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        SchedulingRunnable that = (SchedulingRunnable) o;
        if (params == null) {
            return beanName.equals(that.beanName) &&
                    methodName.equals(that.methodName) &&
                    that.params == null;
        }

        return beanName.equals(that.beanName) &&
                methodName.equals(that.methodName) &&
                params.equals(that.params);
    }

    @Override
    public int hashCode() {
        if (params == null) {
            return Objects.hash(beanName, methodName);
        }

        return Objects.hash(beanName, methodName, params);
    }
}

import java.util.concurrent.ScheduledFuture;

/**
 * @program: simple-demo
 * @description: 定時(shí)任務(wù)控制類
 * @author: CaoTing
 * @date: 2019/5/23
 **/
public final class ScheduledTask {

    public volatile ScheduledFuture future;
    /**
     * 取消定時(shí)任務(wù)
     */
    public void cancel() {
        ScheduledFuture future = this.future;
        if (future != null) {
            future.cancel(true);
        }
    }
}

編寫(xiě)一個(gè)需要用于測(cè)試的任務(wù)類

import org.springframework.stereotype.Component;

/**
 * @program: simple-demo
 * @description:
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Component("demoTask")
public class DemoTask {

    public void taskWithParams(String param1, Integer param2) {
        System.out.println("這是有參示例任務(wù)：" + param1 + param2);
    }

    public void taskNoParams() {
        System.out.println("這是無(wú)參示例任務(wù)");
    }
}

進(jìn)行單元測(cè)試

import com.caotinging.demo.application.DynamicTaskApplication;
import com.caotinging.demo.application.SchedulingRunnable;
import com.caotinging.demo.config.CronTaskRegistrar;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * @program: simple-demo
 * @description: 測(cè)試定時(shí)任務(wù)
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = DynamicTaskApplication.class)
public class TaskTest {

    @Autowired
    CronTaskRegistrar cronTaskRegistrar;

    @Test
    public void testTask() throws InterruptedException {
        SchedulingRunnable task = new SchedulingRunnable("demoTask", "taskNoParams", null);
        cronTaskRegistrar.addCronTask(task, "0/10 * * * * ?");

        // 便于觀察
        Thread.sleep(3000000);
    }

    @Test
    public void testHaveParamsTask() throws InterruptedException {
        SchedulingRunnable task = new SchedulingRunnable("demoTask", "taskWithParams", "haha", 23);
        cronTaskRegistrar.addCronTask(task, "0/10 * * * * ?");

        // 便于觀察
        Thread.sleep(3000000);
    }
}

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @program: simple-demo
 * @description: spring獲取bean工具類
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Component
public class SpringContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext = null;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringContextUtils.applicationContext == null) {
            SpringContextUtils.applicationContext = applicationContext;
        }
    }

    //獲取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通過(guò)name獲取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    //通過(guò)class獲取Bean.
    public static  T getBean(Class clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通過(guò)name,以及Clazz返回指定的Bean
    public static  T getBean(String name, Class clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}

        
            org.springframework.boot
            spring-boot-starter-jdbc
        
        
            com.baomidou
            mybatisplus-spring-boot-starter
            1.0.5
        
        
            com.baomidou
            mybatis-plus
            2.1.9
        
        
            mysql
            mysql-connector-java
            runtime
        
        
            com.alibaba
            druid-spring-boot-starter
            1.1.9
        
        
            org.springframework.boot
            spring-boot-starter-aop
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
        
        
        

        
        
            org.springframework.boot
            spring-boot-starter-test
            provided
        

        
        
            org.springframework.boot
            spring-boot-starter-data-redis
        
        
            redis.clients
            jedis
            2.7.3
        

        
        
            org.apache.httpcomponents
            httpclient
        
        
            org.apache.httpcomponents
            httpclient-cache
        

        
        
            org.projectlombok
            lombok
            true
        
        
            com.alibaba
            fastjson
            1.2.31
        
        
            org.apache.commons
            commons-lang3
        
        
            commons-lang
            commons-lang
            2.6
        
        
        
            com.google.guava
            guava
            10.0.1
        

        
        
            com.belerweb
            pinyin4j
            2.5.0
        
    

建議移步github獲取簡(jiǎn)單demo上手實(shí)踐哦，在本文文首哦。有幫助的話點(diǎn)個(gè)贊吧，筆芯。