UTC 時間形式與通常時間格式轉換

package com.clean.a;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class DateTest{
    public static void main(String[] args) throws ParseException {
        //Date d = new Date();

        String x= "2018-02-04 15:30:40";
        SimpleDateFormat dfx = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date m = dfx.parse(x);

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
        df.setTimeZone(TimeZone.getTimeZone("UTC"));
        String res = df.format(m);
        String k = res + "Z";
        System.out.println("res = " + k);
    }
}

 

 

package com.clean;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MyTest {
    public static void main(String[] args) {
        String x= "2018-04-10T10:15:58.858Z";
        String y = UTCStringtODefaultString(x);
        System.out.println("y = " + y);
    }

    public static String UTCStringtODefaultString(String UTCString) {
        try
        {
                UTCString = UTCString.replace("Z", " UTC");
                SimpleDateFormat utcFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS Z");
                SimpleDateFormat defaultFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date date = utcFormat.parse(UTCString);
                return defaultFormat.format(date);

        } catch(ParseException pe)
        {
            pe.printStackTrace();
            return null;
        }
    }
}