Java开发网 - service ntpd status

Topic: service ntpd status > /usr/a.log

1.service ntpd status > /usr/a.log

Posted by: skwujinhua
Posted on: 2008-12-01 14:56

import java.io.*;
public shell
{
public static void main(String [] args ) throws Exception
{
{
{
String status = null;
Process process = Runtime.getRuntime().exec("/bin/sh service ntpd status > /usr/a.log");
process.waitFor();
}
}
}
}

為什么這樣不能把service ntpd status 服務狀態寫到a.log文件里面?
而直接在shell 輸入 service ntpd status > /usr/a.log
可以正常把狀態寫到a.log里面。哪個大哥提示下? 我讓這程序搞暈了。

2.Re:service ntpd status > /usr/a.log [Re: skwujinhua]	Copy to clipboard
Posted by: skwujinhua Posted on: 2008-12-01 16:08 自己已經解決﹐ 因為service ntpd status > /usr/a.log 是文本形命令。所在把該命令寫在shell文件中﹐也就是linux批處理。再exec(/bin/sh 文件名); 就可以在a.log中看到結果了。哈哈。。。。。。但是﹐為什么在排程中執行該程序﹐a.log中確沒有結果。為什么啊?

3.Re:service ntpd status > /usr/a.log [Re: skwujinhua]	Copy to clipboard
Posted by: JiafanZhou Posted on: 2008-12-08 19:43 Link this thread with the following: http://www.cjsdn.net/post/view?bid=1&id=196586&sty=1&tpg=2&age=0 In the above thread, I have explicitly mentioned that file redirection will not work properly in Runtime.getRuntime().exec()....skwujinhua , using a file standard output like ">" will not work within the case here. Regards, Jiafan