使用Spring @Async异步执行方法的笔记

测试代码：

 

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "/spring/*.xml" })
public class JobUtilsTest{
	
	@Autowired
	private DaoService service;

	@Test
	public void testAsync() throws Exception {
		System.out.println("start" );
		service.update(); // ★ 假设这个方法会比较耗时，需要异步执行
		System.out.println("end");
		
		
		Thread.sleep(3000); // 因为junit结束会结束jvm，所以让它等会异步线程
	}
}

 

 DaoService代码：

@Service
public class DaoService {
	@Async
	public void update() {
		try {
			Thread.sleep(2000);
			// do something
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("operation complete.");
	}
}

 

applicationContext.xml

 

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">

	<context:component-scan base-package="com.chinacache" />
 
	<task:annotation-driven />
	
</beans>

 

输出结果：

 

start
end
operation complete.

 

可以看出，输出不是顺序执行，说明异步调用成功了。