spring 异步方法

用注解@Async标注

在xsd约束中，要有

xmlns:task="http://www.springframework.org/schema/task" http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd

在spring的xml文件中，要有

<!--        开启对异步任务的支持    -->    <task:annotation-driven></task:annotation-driven>

在maven pom中，要有

 <!--           spring 依赖           -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>        </dependency>

举个栗子：

@Servicepublic class AsyncTest {    public static void main(String[] args) {        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");        AsyncTest test = (AsyncTest) context.getBean("asyncTest");        test.asyncMethod();        System.out.println("主函数执行完毕了。。。");    }    @Async    public  void asyncMethod(){        try {            //让程序暂停3000秒，相当于执行一个很耗时的任务            Thread.sleep(3000);            System.out.println("执行异步方法");        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}