import org.springframework.stereotype.Component;
/**
 * 统计失败邮件定时重新发送
 * 创建时间 2017年7月21日
 *
 */
@Component("sendMail")
public class SendMail {
 //@Scheduled(cron = "0/5 * * * * ?")
 public void sendMail() {
  System.out.println("统计失败邮件定时重新发送开始");
 }
}

 <!-- 配置任务线性池 -->
<task:executor id="executor" pool-size="5" /> 
<task:scheduler id="scheduler" pool-size="5"/>
<!-- 启用注解驱动的定时任务 -->
<task:annotation-driven executor="executor" scheduler="scheduler" proxy-target-class="true"/>
<task:scheduled-tasks scheduler="scheduler">
  <!-- 统计失败邮件定时重新发送 -->
  <task:scheduled ref="sendMail" method="sendMail" cron="0/5 * * * * ?"/> 
</task:scheduled-tasks>

/**
 * 启动类
 * 创建时间 2017年7月19日
 *
 */
@EnableAutoConfiguration
@ComponentScan(basePackages={"com.itstyle.main"})
@ImportResource({"classpath:spring-context-dubbo.xml","classpath:spring-context-task.xml"})
public class Application {
 private static final Logger logger = Logger.getLogger(Application.class);
 public static void main(String[] args) throws InterruptedException {
  SpringApplication.run(Application.class, args);
  logger.info("项目启动 ");
 }
}

@Target({ java.lang.annotation.ElementType.METHOD,
  java.lang.annotation.ElementType.ANNOTATION_TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Repeatable(Schedules.class)
public @interface Scheduled {
 public abstract String cron();
 public abstract String zone();
 public abstract long fixedDelay();
 public abstract String fixedDelayString();
 public abstract long fixedRate();
 public abstract String fixedRateString();
 public abstract long initialDelay();
 public abstract String initialDelayString();
}