使用Spring @Async异步执行方法的笔记

测试代码：

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

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?DaoService代码：

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

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applicationContext.xml

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<?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>

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输出结果：

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start
end
operation complete.

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可以看出，输出不是顺序执行，说明异步调用成功了。

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