用java抓网页读取国际时间,执行linux shell命令更改时间
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//同步时间public static void updateTime() throws Exception {HttpClient client=new HttpClient();String str="http://123.125.114.102/special/time/";GetMethod get=new GetMethod(str);client.executeMethod(get);byte b[]=get.getResponseBody();String html=new String(b,"gbk");int ind=html.indexOf("baidu_time(");if(ind!=-1){int end=html.indexOf(")", ind);System.out.println(html.substring(ind+11,end));Calendar now=Calendar.getInstance();now.setTimeInMillis(new BigDecimal(html.substring(ind+11,end)).longValue());System.out.println(getStringFromDate(now.getTime()));String[] cmd = {"date","-s",CalendarHelper.getStringFromDate(now.getTime()) };ProcessBuilder pb=new ProcessBuilder(cmd);Map<String,String> map=pb.environment();Iterator it=map.keySet().iterator();while(it.hasNext()){System.out.println(it.next());} pb.start(); //以下同步硬件时间String cmd2[]={"hwclock","--systohc" };pb=new ProcessBuilder(cmd2);pb.start();;}}?
另外还有个命令更简单：
rdate ? ?tick.greyware.com ? ? ? ? ? 或 ??rdate 71.252.193.25
一行命令搞定。
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