@Async @Scheduled 调度

spring 3中的@async初探

•  
  Java代码

  1. <P>@RunWith(SpringJUnit4ClassRunner.class)</P>@ContextConfiguration(locations = { "/spring/*.xml" })
  2. public class JobUtilsTest{
  4. @Autowired
  5. private DaoService service;
  7. @Test
  8. public void testAsync()throws Exception {
  9. System.out.println("start" );
  10. service.update(); // ★ 假设这个方法会比较耗时，需要异步执行
  11. System.out.println("end");
  14. Thread.sleep(3000); // 因为junit结束会结束jvm，所以让它等会异步线程
  15. }
  16. }

  @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}
  }

  DaoService代码：

  Java代码

  1. @Service
  2. public class DaoService {
  3. @Async
  4. public void update() {
  5. try {
  6. Thread.sleep(2000);
  7. // do something
  8. } catch (InterruptedException e) {
  9. e.printStackTrace();
  10. }
  11. System.out.println("operation complete.");
  12. }
  13. }

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

  applicationContext.xml

  Xml代码

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"
  4. xmlns:context="http://www.springframework.org/schema/context"
  5. xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:task="http://www.springframework.org/schema/task"
  6. xsi:schemaLocation="http://www.springframework.org/schema/beans
  7. http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  8. http://www.springframework.org/schema/context
  9. http://www.springframework.org/schema/context/spring-context-3.0.xsd
  10. http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">
  12. <context:component-scanbase-package="com.chinacache"/>
  14. <task:annotation-driven/>
  16. </beans>

  <?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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://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。