springboot中异步线程调用问题

「爱情、让人受尽委屈。」 2022-05-30 22:50 222阅读 0赞

# 1.原始线程总结 #

我们在使用多线程的时候，往往需要创建Thread类，或者实现Runnable接口，如果要使用到线程池，我们还需要来创建Executors。

# 2.spring线程 #

只要要@EnableAsync就可以使用多线程。使用@Async就可以定义一个线程任务。通过spring给我们提供的ThreadPoolTaskExecutor就可以使用线程池。

# 3.使用 #

## 3.1 新建springboot项目 ##

![SouthEast][]

## 3.2 项目导入idea ##

目录结构如下：

![SouthEast 1][]

## 3.3 新建线程配置类 ##

package com.hotpot.comm.config;
    
    import java.util.concurrent.Executor;
      
    import org.springframework.context.annotation.Bean;  
    import org.springframework.context.annotation.ComponentScan;  
    import org.springframework.context.annotation.Configuration;  
    import org.springframework.scheduling.annotation.EnableAsync;  
    import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;  
    
    
    /**
     * 描述:
     * @author: myx
     * @date: 2018/1/31 0031
     * Copyright © 2017-ganinfo. All rights reserved.
     */
    @Configuration  
    @ComponentScan("com.hotpot.*.service.impl")
    @EnableAsync
    public class ThreadConfig  {  
         /**
          * 执行需要依赖线程池，这里就来配置一个线程池
          * @return
          */
         @Bean  
         public Executor getExecutor() {  
              ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();  
              executor.setCorePoolSize(10);
              executor.setMaxPoolSize(100);
              executor.setQueueCapacity(250);
              executor.initialize();  
              return executor;  
         }  
    }

## 3.4 新建service类 ##

package com.hotpot.test.service.impl;
    
    import org.springframework.scheduling.annotation.Async;
    import org.springframework.stereotype.Service;
    
    import java.util.Random;
    import java.util.UUID;
    
    /**
     * 描述：
     * @author: myx
     * @date: 2018/1/31 0031 17:09
     * @version: V1.0
     * Copyright © 2018-ganinfo. All rights reserved.
     */
    @Service
    public class TestServiceImpl {
        /**
         * 这里进行标注为异步任务，在执行此方法的时候，会单独开启线程来执行
         */
        @Async
        public void function1() {
            System.out.println("f1 : " + Thread.currentThread().getName() + "   " + UUID.randomUUID().toString());
            try {
                Thread.sleep(new Random().nextInt(100));
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    
        @Async
        public void function2() {
            System.out.println("f2 : " + Thread.currentThread().getName() + "   " + UUID.randomUUID().toString());
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

## 3.5 编写controler ##

package com.hotpot.test.controller;
    
    import com.hotpot.test.service.impl.TestServiceImpl;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * 描述：
     *
     * @author: ruikanwang
     * @date: 2018/1/31 0031 17:24
     * @version: V1.0
     * 注意：本内容仅限于新疆感知科技有限公司内部传阅,禁止外泄以及用于其他的商业目
     * Copyright © 2018-ganinfo. All rights reserved.
     */
    @RestController
    public class TestController {
        @Autowired
        TestServiceImpl service;
    
        @GetMapping("/test")
        public void test(){
            for (int i = 0; i < 10; i++) {
                service.function1(); // 执行异步任务
                service.function2();
            }
        }
    }

## 3.6 启动项目 ##

启动成功访问http://localhost:8080/test 运行结果：

![SouthEast 2][]

可以看到异步调用实现成功

# 4.其他实现方式 #

package com.hotpot.comm.config;
    
    import java.util.concurrent.Executor;  
      
    import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;  
    import org.springframework.context.annotation.ComponentScan;  
    import org.springframework.context.annotation.Configuration;  
    import org.springframework.scheduling.annotation.AsyncConfigurer;  
    import org.springframework.scheduling.annotation.EnableAsync;  
    import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;  
      
    @Configuration
    @ComponentScan("com.hotpot.*.service.impl")
    @EnableAsync  
    public class ThreadConfig implements AsyncConfigurer {  
      
         @Override  
         public Executor getAsyncExecutor() {  
              ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();  
              executor.setCorePoolSize(5);  
              executor.setMaxPoolSize(10);  
              executor.setQueueCapacity(25);  
              executor.initialize();  
              return executor;  
         }  
      
         @Override  
         public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {  
              return null;  
         }  
      
    }

参考链接： http://blog.csdn.net/king\_kgh/article/details/76022136

**后续添加springboot 异步线程池starter(实现自定义多个线程池共存)请关注博客**

# ***更多知识参见\[持续更新\]*** #

[springboot教程目录][springboot]

[SouthEast]: /images/20220531/f8aceacafa01493380b2ef32c7a0e797.png
[SouthEast 1]: /images/20220531/98d303d845e743d6a91ce7b29f914d19.png
[SouthEast 2]: /images/20220531/0377289f222b4aeb82346b27fbf9cf02.png
[springboot]: https://blog.csdn.net/qq_31463999/article/details/81627799