java编程如何实现2017-01-16 22:28:26.0这样的时间数据，转换成2017:01:16:22:28:26这样的时间数据

package zhouls.bigdata.DataFeatureSelection.util;

/*

 * 这个程序，是用来做补充的

 */

public class timereplace {

     public static void main(String[] args) {

            String rawtime = "2017-01-16 22:28:26.0";

            String rawtime1 = rawtime.replaceAll("-", ":");//2017:01:16 22:28:26.0

            String rawtime2 = rawtime1.replaceAll(" ", ":");//2017:01:16:22:28:26.0

            System.out.println(rawtime2.substring(, )); //打印字符串2017:01:16:22:28:26

        }

}