JAVA调用shell命令时重定向、管道时遇到的问题
用java在Linux环境下执行shell命令，可以使用如下方法：

import java.io.IOException;public class JavaShell{        /**         * @param args         * @throws IOException         * @throws InterruptedException         */        public static void main(String[] args) throws IOException, InterruptedException        {                Process p;                p = Runtime.getRuntime().exec(new String[]{"sh","-c","md5sum a.c > a.c.md5"});                if(0==p.waitFor())                {                        System.out.println("Command execute result is OK!");                }                else                {                        System.out.println("Command execute result is fail......");                }        }}

Reference:
http://hi.baidu.com/litertiger/blog/item/822a7ef049c913d47831aa19.html
http://blog.csdn.net/georgejin/archive/2010/10/13/5937877.aspx
http://hi.baidu.com/zhangtianshun/blog/item/ae632246b572b40e6a63e579.html

转自：http://www.liaoqiqi.com/blog/2011/java-call-shell-command-redirection-pipeline-problems/