前言
公司客户线上服务器采用的是UOS系统，实施发现系统不会同步时间，并且时间有真实时间有偏差，本意想安装NTP授时服务，结果发现UOS安装NTP都要折腾好久，遂采用Java来曲线救国了。
添加依赖
<dependency><groupId>commons-net</groupId><artifactId>commons-net</artifactId><version>3.10.0</version>
</dependency>
编写同步代码
public static void main(String[] args) throws IOException, InterruptedException {SpringApplication.run(TimeApplication.class, args);// 获取时区TimeZone timeZone = TimeZone.getTimeZone("GMT+8:00");// 设置时区TimeZone.setDefault(timeZone);try (NTPUDPClient timeClient = new NTPUDPClient()) {// 定义阿里云ntp授时服务地址InetAddress timeServerAddress = InetAddress.getByName("ntp.aliyun.com");TimeInfo timeInfo = timeClient.getTime(timeServerAddress);TimeStamp timeStamp = timeInfo.getMessage().getTransmitTimeStamp();// 定义格式化时间格式SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 设置时区format.setTimeZone(timeZone);// 获取格式化时间String newTime = format.format(timeStamp.getTime());System.out.println("获取时间为: " + newTime);String timeCommand = "sudo date -s '" + newTime + "'";// 以root身份执行命令String[] command = {"/bin/sh", "-c", timeCommand};Process process = Runtime.getRuntime().exec(command);process.waitFor();int exitValue = process.waitFor();if (exitValue == 0) {System.out.println("系统时间已设置为: " + newTime);} else {System.out.println("设置系统时间失败.");}}
}
)
)
