package cn.yang.test.utils;
import cn.yang.test.entity.Student;
import org.springframework.scheduling.annotation.*;
import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.Future;
/**
* Created by admin on 2016/1/18.
*/
@Component
public class ScheduledTasks {
@Scheduled(fixedRate = 3000)
public void run() {
System.out.println(new SimpleDateFormat(“yyyy-MM-dd:hh:mm:ss” +
“”).format(new Date()));
}
这个是异步执行的代码
@Async
public Future run2(int i){
try {
System.out.println(“async—”);
Thread.sleep(i);
} catch (InterruptedException e) {
e.printStackTrace();
}
Student stu=new Student();
stu.setName("yang");
stu.setAge(20);
return new AsyncResult<Student>(stu);
}
}
测试异步执行
@Autowired
private ScheduledTasks scheduledTasks;
public void test1() throws ExecutionException, InterruptedException {
System.out.println(“Asy start!”);
//Future<Student> stringFuture = new ScheduledTasks().run2(20000);
上面注释的部分就是之前错误的写法,重新new 了一个ScheduledTasks对象,new出的对象不归spring管理,所以调用上面@Async标注的异步方法并没有异步返回结果。
应该注入spring管理的scheduledTasks对象,这样调用的时候方法才会产生异步返回的结果
Future<Student> stringFuture =scheduledTasks.run2(20000);
System.out.println("Asy back!");
int i=0;
while (!stringFuture.isDone()){
Thread.sleep(1000);
System.out.println(i++);
}
System.out.println(stringFuture.get().toString());
}
测试结果
Asy start!
Asy back!
async—
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Student{name=’yang’, age=20}//异步返回结果