Java 使用预定义的格式模式

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import java.time.LocalDate;

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import java.time.LocalDateTime;

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import java.time.LocalTime;

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import java.time.Month;//来自 时 代 J a v a 公 众 号 - nowjava.com

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import java.time.format.DateTimeFormatter;

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import static java.time.format.FormatStyle.FULL;

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import static java.time.format.FormatStyle.LONG;

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import static java.time.format.FormatStyle.MEDIUM;

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import static java.time.format.FormatStyle.SHORT;

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import java.util.Locale;

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public class Main {

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  public static void main(String[] args) {

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    LocalDate ld = LocalDate.of(2012, Month.APRIL, 19);

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    LocalTime lt = LocalTime.of(16, 30, 20);

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    LocalDateTime ldt = LocalDateTime.of(ld, lt);

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    DateTimeFormatter fmt = DateTimeFormatter.ofLocalizedDate(SHORT);

    /**

     from

    * N o  w  J a v a . c o m - 时  代  Java 

    **/

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    System.out.println("Formatter Default Locale: " + fmt.getLocale());

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    System.out.println("Short Date: " + fmt.format(ld));

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    fmt = DateTimeFormatter.ofLocalizedDate(MEDIUM);

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    System.out.println("Medium Date: " + fmt.format(ld));

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    fmt = DateTimeFormatter.ofLocalizedDate(LONG);

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    System.out.println("Long Date: " + fmt.format(ld));

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    fmt = DateTimeFormatter.ofLocalizedDate(FULL);

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    System.out.println("Full Date: " + fmt.format(ld));

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    fmt = DateTimeFormatter.ofLocalizedTime(SHORT); 

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    System.out.println("Short Time: " + fmt.format(lt));

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    fmt = DateTimeFormatter.ofLocalizedDateTime(SHORT);

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    System.out.println("Short Datetime: " + fmt.format(ldt));

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    fmt = DateTimeFormatter.ofLocalizedDateTime(MEDIUM);

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    System.out.println("Medium Datetime: " + fmt.format(ldt));

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    // Use German locale to format the datetime in medius style

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    fmt = DateTimeFormatter.ofLocalizedDateTime(MEDIUM)

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                           .withLocale(Locale.GERMAN);

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    System.out.println("German Medium Datetime: " + fmt.format(ldt));

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    // Use Indian(English) locale to format datetime in short style

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    fmt = DateTimeFormatter.ofLocalizedDateTime(SHORT)

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