Springboot 多線程的使用

直接上代碼

線程配置類

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 松門一枝花
 * @Date 2020/5/28
 */
@Configuration
@EnableAsync  // 啓用異步任務
public class AsyncConfiguration {

    // 聲明一個線程池(並指定線程池的名字)
    @Bean("nbpiTaskExecutor")
    public Executor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

        //核心線程數：線程池創建時候初始化的線程數
        executor.setCorePoolSize(5);

        //最大線程數：線程池最大的線程數，只有在緩衝隊列滿了之後纔會申請超過核心線程數的線程
        executor.setMaxPoolSize(500);

        //允許線程的空閒時間60秒：當超過了核心線程出之外的線程在空閒時間到達之後會被銷燬
        executor.setKeepAliveSeconds(60);

        //線程池名的前綴：設置好了之後可以方便我們定位處理任務所在的線程池
        executor.setThreadNamePrefix("DailyAsync-");
        executor.initialize();
        return executor;
    }
}

服務類

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 松門一枝花
 * @Date 2020/5/28
 */
@Service
public class CustomMultiThreadingService {

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

    /*
    如何讓異步調用的執行任務使用這個線程池中的資源來運行呢？方法非常簡單，我們只需要在@Async註解中指定線程池名即可
     */

    @Async("nbpiTaskExecutor")
    public void executeAysncTask(Integer i) throws InterruptedException {
        logger.info("CustomMultiThreadingService ==> executeAysncTask1 method: 執行異步任務{} ", i);
        Thread.sleep(500L);
    }

}

控制類

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 松門一枝花
 * @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";
    }

}

運行效果

 

異步方法和調用方法一定要寫在不同的類中 ,如果寫在一個類中,是沒有效果的！