Springboot 多线程的使用

直接上代码

线程配置类

package zengmg.nbpi.com.thread;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;

/**
 * @Auther 松门一枝花
 * @Date 2020/5/28
 */
@Configuration
@EnableAsync  // 启用异步任务
public class AsyncConfiguration {

    // 声明一个线程池(并指定线程池的名字)
    @Bean("nbpiTaskExecutor")
    public Executor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

        //核心线程数：线程池创建时候初始化的线程数
        executor.setCorePoolSize(5);

        //最大线程数：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(500);

        //允许线程的空闲时间60秒：当超过了核心线程出之外的线程在空闲时间到达之后会被销毁
        executor.setKeepAliveSeconds(60);

        //线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix("DailyAsync-");
        executor.initialize();
        return executor;
    }
}

服务类

package zengmg.nbpi.com.thread;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;


/**
 * @Auther 松门一枝花
 * @Date 2020/5/28
 */
@Service
public class CustomMultiThreadingService {

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

    /*
    如何让异步调用的执行任务使用这个线程池中的资源来运行呢？方法非常简单，我们只需要在@Async注解中指定线程池名即可
     */

    @Async("nbpiTaskExecutor")
    public void executeAysncTask(Integer i) throws InterruptedException {
        logger.info("CustomMultiThreadingService ==> executeAysncTask1 method: 执行异步任务{} ", i);
        Thread.sleep(500L);
    }

}

控制类

package zengmg.nbpi.com.thread;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @Auther 松门一枝花
 * @Date 2020/5/28
 */
@Controller
@RequestMapping(value="/multithreading")
public class CustomMultiThreadingController {

    @Autowired
    private CustomMultiThreadingService customMultiThreadingService;

    @ResponseBody
    @RequestMapping("/dotask")
    public String doTask() {

        try {
            for (int i=0;i<100000;i++){
                customMultiThreadingService.executeAysncTask(i);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        return "success";
    }

}

运行效果

异步方法和调用方法一定要写在不同的类中 ,如果写在一个类中,是没有效果的！

Springboot 多线程的使用

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