import java.text.SimpleDateFormat;

public class TestMill {

public static String getTimeMillisSequence(){

long nanoTime = System.nanoTime();

String preFix="";

if (nanoTime<0){

preFix="0";//负数补位A保证负数排在正数Z前面,解决正负临界值(如A9223372036854775807至Z0000000000000000000)问题。

nanoTime = nanoTime+Long.MAX_VALUE+1;

}else{

preFix="0";

}

String nanoTimeStr = String.valueOf(nanoTime);

int difBit=String.valueOf(Long.MAX_VALUE).length()-nanoTimeStr.length();

for (int i=0;i<difBit;i++){

preFix = preFix+"0";

}

nanoTimeStr = preFix+nanoTimeStr;

SimpleDateFormat sdf=new SimpleDateFormat("yyyMMddHHmmssSSS"); //24小时制

// String timeMillisSequence=sdf.format(System.currentTimeMillis())+"-"+nanoTimeStr;

String timeMillisSequence=sdf.format(System.currentTimeMillis());

return timeMillisSequence;

}

public static void main(String[] args) {

System.out.println(TestMill.getTimeMillisSequence());

System.out.println(Long.MAX_VALUE);

}

}