ubuntu下使用crontab命令定时执行java程序

Test.java代码如下：

import java.util.Date;


public class Test {

	public static void main(String[] args) {
		
		System.out.println((new Date()).toString());
		System.out.println("==================begin=================");
		for(int i=1;i<=10;i++){
			System.out.println("i = "+ i);
		}
		System.out.println("=================the end================");
	}
}

编写test.sh文件，文件内容如下：

cd /home/yangjianzhou/testTimer
/usr/local/java/jdk1.7.0_25/bin/java Test >> test.log
#将Test.java中所有的打印输入（System.out.print()）都输出到test.log文件中

指定定时程序，在控制台上输入 crontab -l

输入如下内容：

crontab -l  
*/1 * * * * date >> $HOME/test.txt
*/1 * * * * sh /home/yangjianzhou/testTimer/test.sh

重启crontab服务，service cron restart

运行结果如下：

test.log文件内容如下：

Fri Aug 23 18:14:01 CST 2013
==================begin=================
i = 1
i = 2
i = 3
i = 4
i = 5
i = 6
i = 7
i = 8
i = 9
i = 10
=================the end================
Fri Aug 23 18:15:01 CST 2013
==================begin=================
i = 1
i = 2
i = 3
i = 4
i = 5
i = 6
i = 7
i = 8
i = 9
i = 10
=================the end================
Fri Aug 23 18:16:01 CST 2013
==================begin=================
i = 1
i = 2
i = 3
i = 4
i = 5
i = 6
i = 7
i = 8
i = 9
i = 10
=================the end================