Java 带时区的Android格式日期

我需要将日期格式化为特定字符串

我使用了

SimpleDateFormat

类来格式化日期，使用模式“

yyyy-MM-dd'HH:MM:ssZ

”将当前日期返回为
“

2013-01-04T15:51:45+0530

”但我需要as
“

2013-01-04T15:51:45+05:30

”

下面是使用的编码

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);      
Log.e(C.TAG, "formatted string: "+sdf.format(c.getTime()));

输出：格式化字符串：

2013-01-04T15:51:45+0530

我需要格式为

2013-01-04T15:51:45+05:30

只需在gmt时间之间添加冒号

因为我正在使用Google calendar来插入事件，所以它只接受我提到的所需格式。

您可以使用它。它的

DateTimeFormat

有一个

ZZ

format属性，可以满足您的需要

最大的优势：与

SimpleDateFormat

不同，

DateTimeFormatter

是线程安全的。用法：

DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ssZZ")
    .withLocale(Locale.ENGLISH);

---

您只需使用substring（）手动添加“：”。我之前遇到过这个问题，这个解决方案很有效。

试试这个

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);   

System.out.println("formatted string: "+sdf.format(c.getTime()));

String text = sdf.format(c.getTime());  
String result = text.substring(0, 22) + ":" + text.substring(22);  
System.out.println("result = " + result);

---

为什么不直接用regexp手动执行呢

String oldDate = "2013-01-04T15:51:45+0530";
String newDate = oldDate.replaceAll("(\\+\\d\\d)(\\d\\d)", "$1:$2");

子字符串的结果相同（如果性能有问题）

试试这个代码

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss Z", Locale.ENGLISH);
String s = sdf.format(c.getTime());
String fDate = s.substring(0, s.length()-2) +":"+s.substring(s.length()-2, s.length());
Log.e("check", "formatted string: "+fDate);

您还可以在模式中使用“ZZZZZ”而不是“Z”（根据）。像这样的

    Calendar c = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZZZZZ", Locale.ENGLISH);      
    Log.e(C.TAG, "formatted string: "+sdf.format(c.getTime()));

---

只需重构此代码并用所需的语言环境替换“Locale.getDefault（）”

private SimpleDateFormat getDateFormat() {
    SimpleDateFormat dateFormat = (SimpleDateFormat) SimpleDateFormat.getDateTimeInstance(SimpleDateFormat.SHORT, SimpleDateFormat.DEFAULT, Locale.getDefault());
    String pattern = dateFormat.toLocalizedPattern();
    pattern = pattern.trim();
    dateFormat.applyLocalizedPattern(pattern);
    return dateFormat;
}

//下面是用法

SimpleDataFormat sdf=getDateFormat（）

---

格式（新日期（））

如果您想要另一个时区的日期（标题所示）

---

这就是我在android Build.VERSION.SDK_INT<26上的实现方式

int offset = TimeZone.getDefault().getRawOffset();
String str_date='20:30 12-01-2021';
DateFormat formatter = new SimpleDateFormat("HH:mm dd-MM-yyy",Locale.US);
Date date = formatter.parse(str_date);
long utcTime = date.getTime() + (3600000*3);
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm dd/MM/yyyy", Locale.US);
String dateStr = sdf.format(utcTime + offset);
System.out.println(dateStr);

当我的服务器发送带有-3时区的时间时，我必须将（3600*3）添加到getTime中，并将其保存到utcTime中，这样utcTime就是UTC。然后我把手机当前时区的偏移量加到utcTime中。 在我的例子中，我的时区是-3，它的打印：

20:30 12/01/2021

但是如果我改变时区，日期也会改变

我在这里已经回答了：

tl；博士 您可以使用模式，

yyyy-MM-dd'T'HH:MM:ssXXX

获得所需的输出

java.time

java.util

的日期时间API及其格式化API

SimpleDataFormat

已经过时，并且容易出错。建议完全停止使用，并切换到

• 无论出于何种原因，如果您必须坚持使用Java6或Java7，您可以使用哪个backport将大部分Java.time功能移植到Java6&7
• 如果您正在为Android项目工作，并且您的Android API级别仍然不符合Java-8，请检查并确认

使用现代日期时间API： 构建包含日期、时间和时区偏移信息的对象，并设置相同的格式：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

输出：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

正如您所注意到的，默认格式和使用

DateTimeFormatter

的格式的输出是相同的。然而，这里有一个陷阱：的实现省略了

0

的秒数和秒的分数，即如果上述代码中的时间是

LocalTime。在（15，0，0）

中，默认格式的输出将是

2013-01-04T15:00+05:30

。如果您这次需要像

2013-01-04T15:00:00+05:30

这样的字符串，则必须使用带有所需模式的

DateTimeFormatter

解析和格式化：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

输出：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

使用传统API： 为给定时区偏移量构建日期时间对象，并设置相同的格式：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

输出：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

Calendar

类使用

UTC

（或

GMT

）作为其默认时区，因此，除非您使用它指定时区，否则它将返回

UTC

的

java.util.Date

对象

类似地，

SimpleDataFormat

类也使用

UTC

作为其默认时区，因此，除非您使用它指定时区，否则它将返回

UTC

中相应日期时间的格式化

字符串

解析和格式化：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

输出：

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2013, 1, 4), LocalTime.of(15, 51, 45),
                ZoneOffset.ofHoursMinutes(5, 30));

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtf.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        DateTimeFormatter dtfForInputString = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        OffsetDateTime odt = OffsetDateTime.parse("2013-01-04T15:51:45+0530", dtfForInputString);

        // Print the default format i.e. the string returned by OffsetDateTime#toString
        System.out.println(odt);

        // Custom format
        DateTimeFormatter dtfCustomOutput = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        System.out.println(dtfCustomOutput.format(odt));
    }
}

2013-01-04T15:51:45+05:30
2013-01-04T15:51:45+05:30

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+05:30"));
        calendar.set(2013, 0, 4, 15, 51, 45);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        Date date = calendar.getTime();
        System.out.println(sdf.format(date));
    }
}

2013-01-04T15:51:45+05:30

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

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat sdfForInputString = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.ENGLISH);
        Date date = sdfForInputString.parse("2013-01-04T15:51:45+0530");

        SimpleDateFormat sdfCustomOutput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
        sdfCustomOutput.setTimeZone(TimeZone.getTimeZone("GMT+05:30"));
        System.out.println(sdfCustomOutput.format(date));
    }
}

2013-01-04T15:51:45+05:30

我认为你不能用简单的格式。因此，您需要手动插入
：
。它比
Z
有更多的格式化选项，但在android上不可用（还没有？）。如果手动格式化是要完成的任务（参考上述注释），您可以搜索最后一个
+
，然后在两个索引后添加
：
。@KazekageGaara它也可以是
-
…在2013年，使用
日历和
简化格式是合理的，不要再这样做了。这些类设计得很糟糕，现在已经过时很久了，尤其是后者更是出了名的麻烦。而是使用
OffsetDateTime
和
DateTimeFormatter
，两者都来自。或者只是
OffsetDateTime.toString
而没有格式化程序。考虑到：DateTime my_date=new DateTime（）；，我发现了一种稍微不同的方法来实现这一点。。。将日期设置为my_date=。。。然后将其格式化为：字符串curr_date=my_date.toLocalDate（）.toString（“yyyy-MM-dd”）；更新：Joda时间框架已被JSR 310中定义的java.Time所取代。大多数java.time功能在所有版本的Android中都可以使用最新的工具，使用API“desugaring”。请参阅中的链接和更多信息。这是正确答案，@fargath您应该标记它。这应该是正确答案。当人们把图书馆作为主要解决方案而不是次要建议时，我觉得很可笑。这就像用剑穿衣服。文件上说它支持X。对我来说，这不起作用。我得到这个字符串：
2018-07-06T11:46:43+0200
。时区中的冒号丢失。所以它不是ISO8601。我没有看到提到5
Z