如何设置java.util.Date的偏移量? [英] How to set offset of a java.util.Date?

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问题描述

我有一个日期作为字符串- 15Sep20162040 ,我必须将其格式化为时区为 2016-09-15T20的另一种格式: 40:00 + 0400

I have a Date as a String - 15Sep20162040, which I have to format it into another format with Timezone as 2016-09-15T20:40:00+0400.

我做了如下操作:

import java.text.ParseException;
import java.text.SimpleDateFormat;

public class DateFormatExample {

    private static SimpleDateFormat offsetDateFormat = new SimpleDateFormat(
            "yyyy-MM-dd'T'HH:mm:ssZ");

    private static SimpleDateFormat dateFormatter = new SimpleDateFormat(
            "ddMMMyyyyHHmm");

    public static void main(String[] args) throws ParseException {
        String date = "15Sep20162040";
        String result = offsetDateFormat.format(dateFormatter.parse(date));
        System.out.println(result); // 2016-09-15T20:40:00+0400         

    }
}

现在,我必须根据时区差异来修改输出,例如,如果差异为 +0100 ,则输出应类似于: 2016-09-15T20:40:00 + 0100 ,如果差异为 -0200 ,则输出应类似于: 2016-09-15T20:40:00-0200

Now, I have to modify the output based on timezone difference, for example if difference is +0100, output should resemble as: 2016-09-15T20:40:00+0100 and if difference is -0200, output should resemble as: 2016-09-15T20:40:00-0200.

我该如何实现?

推荐答案

您可以将 SimpleDateFormat setTimeZone 方法用作下面:

You can use SimpleDateFormat's setTimeZone method as below:

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

public class DateFormatExample {

    private static SimpleDateFormat offsetDateFormat = new SimpleDateFormat(
            "yyyy-MM-dd'T'HH:mm:ssZ");

    private static SimpleDateFormat dateFormatter = new SimpleDateFormat(
            "ddMMMyyyyHHmm");

    public static void main(String[] args) throws ParseException {
        String date = "15Sep20162040";
        String result = offsetDateFormat.format(dateFormatter.parse(date));
        System.out.println(result); // 2016-09-15T20:40:00+0400
        offsetDateFormat.setTimeZone(TimeZone.getTimeZone("GMT-8:00"));
        result = offsetDateFormat.format(dateFormatter.parse(date));
        System.out.println(result);
    }
}

如果您只想在最后更改时区结果的值,请尝试以下操作:

If you simply want to change the timezone at the end of result, please try the following:

    String offset = "GMT-8:00";
    String date = "15Sep20162040";
    date = date+" "+offset;
    SimpleDateFormat dateFormatter2 = new SimpleDateFormat("ddMMMyyyyHHmm Z");
    SimpleDateFormat offsetDateFormat2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
    offsetDateFormat2.setTimeZone(TimeZone.getTimeZone(offset));
    String result = offsetDateFormat2.format(dateFormatter2.parse(date));
    System.out.println(result);

希望这会有所帮助。

这篇关于如何设置java.util.Date的偏移量?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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