详解spring多线程与定时任务

package com.foreveross.service.weixin.test.thread;

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;

/**
 * 注入一个线程池
 * @author mingge
 *
 */

@Configuration
@ComponentScan("com.foreveross.service.weixin.test.thread")
@EnableAsync
public class TaskExecutorConfig implements AsyncConfigurer {

  @Override
  public Executor getAsyncExecutor() {
    ThreadPoolTaskExecutor taskExecutor=new ThreadPoolTaskExecutor();
    taskExecutor.setCorePoolSize(5);
    taskExecutor.setMaxPoolSize(20);
    taskExecutor.setQueueCapacity(25);
    taskExecutor.initialize();
    return taskExecutor;
  }

  @Override
  public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
    return null;
  }

  
}

package com.foreveross.service.weixin.test.thread;

import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

/**
 * 线程池任务
 * @author mingge
 *
 */
@Service
public class TaskService {

  @Async
  public void executeAsyncTask(int i){
    System.out.println("执行异步任务:"+i);
  }
  
  @Async
  public void executeAsyncTask1(int i){
    System.out.println("执行异步任务1:"+(i+i));
  }
}

package com.foreveross.service.weixin.test.thread;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;


/**
 * 
 * @author mingge
 *
 */
public class Test {

  public static void main(String[] args) {
    AnnotationConfigApplicationContext context=new AnnotationConfigApplicationContext(TaskExecutorConfig.class);
    TaskService taskService=context.getBean(TaskService.class);
    for(int i=0;i<20;i++){
      taskService.executeAsyncTask(i);
      taskService.executeAsyncTask1(i);
    }
    //最后可以根据结果可以看出结果是并发执行而不是顺序执行的呢
    context.close();
  }
}

package com.foreveross.service.weixin.test.thread;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;

@Configuration
@ComponentScan("com.foreveross.service.weixin.test.thread")
@EnableScheduling//开启对定时器的支持
public class TaskSchedulerConfig {

}

package com.foreveross.service.weixin.test.thread;

import java.util.Date;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

@Service
public class TimerTaskJob {

  @Scheduled(fixedRate=2000)
  public void test(){
    System.out.println("我是定时任务:"+new Date().getSeconds());
  }
}

package com.foreveross.service.weixin.test.thread;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class TestTimer {
  public static void main(String[] args) {
    AnnotationConfigApplicationContext context=new AnnotationConfigApplicationContext(TaskSchedulerConfig.class);
    
    //context.close();
  }
}