由于工作上的原因，需要进行定时任务的动态增删改查，网上大部分资料都是整合quertz框架实现的。本人查阅了一些资料，发现springBoot本身就支持实现定时任务的动态控制。并进行改进，现支持任意多参数定时任务配置

实现结果如下图所示：

image

后台测试显示如下：

image

github 简单demo地址如下：
springboot-dynamic-task

1.定时任务的配置类：SchedulingConfig

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: 定时任务配置类
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Configuration
public class SchedulingConfig {
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        // 定时任务执行线程池核心线程数
        taskScheduler.setPoolSize(4);
        taskScheduler.setRemoveOnCancelPolicy(true);
        taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-");
        return taskScheduler;
    }
}

2.定时任务注册类：CronTaskRegistrar

这个类包含了新增定时任务，移除定时任务等等核心功能方法

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: 添加定时任务注册类，用来增加、删除定时任务。
 * @author: CaoTing
 * @date: 2019/5/23
 **/
@Component
public class CronTaskRegistrar implements DisposableBean {

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

    @Autowired
    private TaskScheduler taskScheduler;

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

    /**
     * 新增定时任务
     * @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));
        }
    }

    /**
     * 移除定时任务
     * @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();
    }
}

3.定时任务执行类：SchedulingRunnable

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: 定时任务运行类
 * @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("定时任务开始执行 - bean：{}，方法：{}，参数：{}", 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("定时任务执行异常 - bean：%s，方法：%s，参数：%s ", beanName, methodName, params), ex);
        }

        long times = System.currentTimeMillis() - startTime;
        logger.info("定时任务执行结束 - bean：{}，方法：{}，参数：{}，耗时：{} 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);
    }
}

4.定时任务控制类：ScheduledTask

import java.util.concurrent.ScheduledFuture;

/**
 * @program: simple-demo
 * @description: 定时任务控制类
 * @author: CaoTing
 * @date: 2019/5/23
 **/
public final class ScheduledTask {

    public volatile ScheduledFuture<?> future;
    /**
     * 取消定时任务
     */
    public void cancel() {
        ScheduledFuture<?> future = this.future;
        if (future != null) {
            future.cancel(true);
        }
    }
}

5.定时任务的测试

编写一个需要用于测试的任务类

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("这是有参示例任务：" + param1 + param2);
    }

    public void taskNoParams() {
        System.out.println("这是无参示例任务");
    }
}

进行单元测试

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: 测试定时任务
 * @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 * * * * ?");

        // 便于观察
        Thread.sleep(3000000);
    }

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

        // 便于观察
        Thread.sleep(3000000);
    }
}

6.工具类：SpringContextUtils

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获取bean工具类
 * @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;
        }
    }

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

    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

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

7.我的pom依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatisplus-spring-boot-starter</artifactId>
            <version>1.0.5</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>2.1.9</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- 数据库-->
        <!--<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>-->
        <!-- https://mvnrepository.com/artifact/com.hynnet/oracle-driver-ojdbc -->
        <!--<dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.1.0</version>
        </dependency>-->

        <!-- 单元测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>provided</scope>
        </dependency>

        <!--redisTemplate -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.7.3</version>
        </dependency>

        <!-- http连接 restTemplate -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient-cache</artifactId>
        </dependency>

        <!-- 工具-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.31</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google/guava -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>10.0.1</version>
        </dependency>

        <!-- pinyin4j -->
        <dependency>
            <groupId>com.belerweb</groupId>
            <artifactId>pinyin4j</artifactId>
            <version>2.5.0</version>
        </dependency>
    </dependencies>

8.总结

建议移步github获取简单demo上手实践哦，在本文文首哦。有帮助的话点个赞吧，笔芯。