SimpleDateFormat对象更改时区而不添加/减去正确的小时数[重复]

Question

我有一个字符串，它表示UTC时区中的日期（因为我的数据库使用UTC）。我想用SimpleDateFormat将此字符串转换为日期。问题是，将其转换为CEST时区中的日期，而不添加UTC和CEST之间的2小时间隔。代码如下：

//This is a date in UTC
String text = "2020-09-24T09:45:22.806Z";
//Here I define the correct format (The final Z means that it's UTC)
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"); 
//Then I parse it
Date date = sdf.parse(text);
//Then I print it
System.out.println(date);  

Thu Sep 24 09:45:22 CEST 2020

为什么是Cest？我希望它保持UTC，但如果它必须成为CEST，至少添加2小时

Answer 1

您应该settimezone()设置为dateformat

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

public class Main {
    public static void main(String[] args) throws ParseException {
        //This is a date in UTC
        String text = "2020-09-24T09:45:22.806Z";
        //Here I define the correct format (The final Z means that it's UTC)
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSX");
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        //Then I parse it
        Date date = sdf.parse(text);
        //Then I print it
        System.out.println(date);
    }
}

我还按照文档将'z'替换为X