spring执行同步任务和异步任务 spring技术

顾名思义：同步任务是指事情需要一件一件的做，做完当前的任务，才能开始做下一任务；异步任务是指做当前任务的同时，后台还可以在执行其他任务，可理解为可同时执行多任务，不必一件一件接着去做，下面开始上例子了

1.同步任务
Java代码
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/*
* @(#)SyncTaskExecutorTest.java2011-4-27
*
* Copyright (c) 2011. All Rights Reserved.
*
*/
package org.jsoft.opensource.demos.spring.task;
import org.junit.Test;
import org.springframework.core.task.SyncTaskExecutor;
/**
* Spring同步任务处理
*
* @author Gerald Chen
* @version $Id: SyncTaskExecutorTest.java,v 1.1 2011/05/30 08:58:07 gerald.chen Exp $
*/
public class SyncTaskExecutorTest {
@Test
public void test() throws InterruptedException {
SyncTaskExecutor executor = new SyncTaskExecutor();
executor.execute(new OutThread());
System.out.println("Hello, World!");
Thread.sleep(10000 * 1000L);
}
static class OutThread implements Runnable {
public void run() {
for (int i = 0; i < 1000; i++) {
System.out.println(i + " start ...");
try {
Thread.sleep(2 * 1000L);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}

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必须在线程任务执行完毕之后，"Hello,World!"才会被打印出来
2.异步任务
/*
Java代码

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* @(#)AsyncTaskExecutorTest.java2011-4-27
*
* Copyright (c) 2011. All Rights Reserved.
*
*/
package org.jsoft.opensource.demos.spring.task;
import org.junit.Test;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.core.task.SimpleAsyncTaskExecutor;
/**
* Spring异步任务处理
*
* @author Gerald Chen
* @version $Id: AsyncTaskExecutorTest.java,v 1.1 2011/05/30 08:58:07 gerald.chen Exp $
*/
public class AsyncTaskExecutorTest {
@Test
public void test() throws InterruptedException {
AsyncTaskExecutor executor = new SimpleAsyncTaskExecutor("sys.out");
executor.execute(new OutThread(), 50000L);
System.out.println("Hello, World!");
Thread.sleep(10000 * 1000L);
}
static class OutThread implements Runnable {
public void run() {
for (int i = 0; i < 100; i++) {
System.out.println(i + " start ...");
try {
Thread.sleep(2 * 1000L);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}