spring boot 集成多线程

配置pom文件

<dependency>            <groupId>org.mybatis.spring.boot</groupId>            <artifactId>mybatis-spring-boot-starter</artifactId>            <version>1.3.0</version>        </dependency><dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-configuration-processor</artifactId>            <optional>true</optional>        </dependency>

线程池的配置文件

新建配置文件application.yml
添加内容

#线程池配置spring:  task:    pool:      corePoolSize : 4      maxPoolSize : 8      keepAliveSeconds : 60      queueCapacity : 20

新建线程池参数装载类

@ConfigurationProperties(prefix = "spring.task.pool")public class TaskThreadPoolConfig {    private int corePoolSize;    private int maxPoolSize;    private int keepAliveSeconds;    private int queueCapacity;    public int getCorePoolSize() {        return corePoolSize;    }    public void setCorePoolSize(int corePoolSize) {        this.corePoolSize = corePoolSize;    }    public int getMaxPoolSize() {        return maxPoolSize;    }    public void setMaxPoolSize(int maxPoolSize) {        this.maxPoolSize = maxPoolSize;    }    public int getKeepAliveSeconds() {        return keepAliveSeconds;    }    public void setKeepAliveSeconds(int keepAliveSeconds) {        this.keepAliveSeconds = keepAliveSeconds;    }    public int getQueueCapacity() {        return queueCapacity;    }    public void setQueueCapacity(int queueCapacity) {        this.queueCapacity = queueCapacity;    }}

@ConfigurationProperties(prefix = “spring.task.pool”)是让spring在创建bean时去加载配置文件中开头为spring.task.pool的内容。

这一步需要在spring boot 启动类上加上注解：
@EnableConfigurationProperties({TaskThreadPoolConfig.class})
告诉spring 去根据配置文件的内容去创建bean

线程池的创建

@Configuration@EnableAsyncpublic class TaskExecutePool {    @Autowired    private TaskThreadPoolConfig config;    @Bean    public Executor myTaskAsyncPool() {        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();        executor.setCorePoolSize(config.getCorePoolSize());        executor.setMaxPoolSize(config.getMaxPoolSize());        executor.setQueueCapacity(config.getQueueCapacity());        executor.setKeepAliveSeconds(config.getKeepAliveSeconds());        executor.setThreadNamePrefix("MyExecutor-");        // rejection-policy：当pool已经达到max size的时候，如何处理新任务        // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());        executor.initialize();        return executor;    }}

创建多线程任务类和方法

@Componentpublic class doSomeThing{        @Async("myTaskAsyncPool")    public void produceTask(){        System.out.println("任务生产...");    }    @Async("myTaskAsyncPool")    public void comsumerTask(){        System.out.println("任务消费...");    }}

注意：在需要多线程执行的类上加上注解@Component,在需要多线程执行的方法上加上@Async(“myTaskAsyncPool”)
spring boot 的多线程任务就搭好了，核心线程数量可以根据机器处理器核数进行确定。最好不要超过处理器核数。