spring boot 线程池

spring boot线程池有多种写法，各种写法的主要区别就是在配置方面的区别，现在列举其中一种写法

直接在启动类中进行配置

@SpringBootApplication
@EnableAsync
@ComponentScan("com.text")
public class DemoApplication {
    private int corePoolSize;
    private int maxPoolSize;
    private int queueCapacity;
    private String namePrefix;
    private int keepAliveTime;

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    //指定使用哪一个线程池
    @Bean(name = "threadPool1")
    public Executor asyncServiceExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize = 5);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize = 20);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity = 200);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix(namePrefix ="thread_pool_1");
        //配置线程池最大空闲时间  秒
        executor.setKeepAliveSeconds(keepAliveTime=60);
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }

}

服务消费方

@RestController
public class Hello {

    @Autowired
    private HelloService helloService;

    @RequestMapping("hello")
    public void hello (){
        System.out.println("777");
        helloService.say();
        System.out.println("555");
    }
}

服务提供方

@Component
public class HelloService {

    @Async("threadPool1")
    public void say(){
        try{
            Thread.sleep(1000);
        }catch(Exception e){
            e.printStackTrace();
        }
        System.out.println("666");
    }
}

运行结果：

777
555
666

搞定，想配置多个线程池同理新增一个，只要把@bean里面的name改一个名字，然后在@Async中指定线程池