我得到一个整数,我需要在各种语言环境中转换为月份名称:
locale en-us示例:
1 - >一月
2 - >二月
语言环境es-mx的示例:
1 - > Enero
2 - > Febrero
答案 0 :(得分:193)
import java.text.DateFormatSymbols;
public String getMonth(int month) {
return new DateFormatSymbols().getMonths()[month-1];
}
答案 1 :(得分:32)
您需要将LLLL用于独立月份名称。这在SimpleDateFormat
文档中有记录,例如:
SimpleDateFormat dateFormat = new SimpleDateFormat( "LLLL", Locale.getDefault() );
dateFormat.format( date );
答案 2 :(得分:16)
我会使用SimpleDateFormat。如果有更简单的方法制作蒙太奇的日历,有人会纠正我,我现在在代码中这样做,我不太确定。
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
public String formatMonth(int month, Locale locale) {
DateFormat formatter = new SimpleDateFormat("MMMM", locale);
GregorianCalendar calendar = new GregorianCalendar();
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.MONTH, month-1);
return formatter.format(calendar.getTime());
}
答案 3 :(得分:13)
这是我将如何做到的。我会将int month
的范围检查留给您。
import java.text.DateFormatSymbols;
public String formatMonth(int month, Locale locale) {
DateFormatSymbols symbols = new DateFormatSymbols(locale);
String[] monthNames = symbols.getMonths();
return monthNames[month - 1];
}
答案 4 :(得分:12)
自Java 1.8(或带有ThreeTen-Backport的1.7& 1.6)以来,您可以使用它:
Month.of(integerMonth).getDisplayName(TextStyle.FULL_STANDALONE, locale);
请注意,integerMonth
是基于1的,即1表示1月份。 1月至12月的范围始终为1至12(仅限公历)。
答案 5 :(得分:10)
使用SimpleDateFormat。
import java.text.SimpleDateFormat;
public String formatMonth(String month) {
SimpleDateFormat monthParse = new SimpleDateFormat("MM");
SimpleDateFormat monthDisplay = new SimpleDateFormat("MMMM");
return monthDisplay.format(monthParse.parse(month));
}
formatMonth("2");
结果:二月
答案 6 :(得分:7)
显然在Android 2.2中存在SimpleDateFormat的错误。
要使用月份名称,您必须自己在资源中定义它们:
<string-array name="month_names">
<item>January</item>
<item>February</item>
<item>March</item>
<item>April</item>
<item>May</item>
<item>June</item>
<item>July</item>
<item>August</item>
<item>September</item>
<item>October</item>
<item>November</item>
<item>December</item>
</string-array>
然后在你的代码中使用它们:
/**
* Get the month name of a Date. e.g. January for the Date 2011-01-01
*
* @param date
* @return e.g. "January"
*/
public static String getMonthName(Context context, Date date) {
/*
* Android 2.2 has a bug in SimpleDateFormat. Can't use "MMMM" for
* getting the Month name for the given Locale. Thus relying on own
* values from string resources
*/
String result = "";
Calendar cal = Calendar.getInstance();
cal.setTime(date);
int month = cal.get(Calendar.MONTH);
try {
result = context.getResources().getStringArray(R.array.month_names)[month];
} catch (ArrayIndexOutOfBoundsException e) {
result = Integer.toString(month);
}
return result;
}
答案 7 :(得分:6)
/((http|https)\:\/\/)?[a-zA-Z0-9\.\/\?\:@\-_=#]+\.([a-zA-Z0-9\&\.\/\?\:@\-_=#])*/g
Month.of( yourMonthNumber ) // Represent a month by its number, 1-12 for January-December.
.getDisplayName( // Generate text of the name of the month automatically localized.
TextStyle.SHORT_STANDALONE , // Specify how long or abbreviated the name of month should be.
new Locale( "es" , "MX" ) // Locale determines (a) the human language used in translation, and (b) the cultural norms used in deciding issues of abbreviation, capitalization, punctuation, and so on.
) // Returns a String.
现在在java.time类中更容易实现,这些类取代了这些麻烦的旧遗留日期时间类。
Month
枚举定义了十几个对象,每月一个。
1月至12月的月份编号为1-12。
java.time.Month
要求对象生成name of the month, automatically localized的字符串。
调整TextStyle
以指定您想要名称的长度或缩写。请注意,在某些语言(非英语)中,月份名称会有所不同,如果单独使用或作为完整日期的一部分使用。因此,每种文字样式都有Month month = Month.of( 2 ); // 2 → February.
变体。
指定Locale
以确定:
示例:
…_STANDALONE
Locale l = new Locale( "es" , "MX" );
String output = Month.FEBRUARY.getDisplayName( TextStyle.SHORT_STANDALONE , l ); // Or Locale.US, Locale.CANADA_FRENCH.
对象仅供参考,向另一个方向(解析月份名称字符串以获取Month
枚举对象)不是内置的。您可以编写自己的类来执行此操作。以下是我对这类课程的快速尝试。 使用风险自负。我没有认真考虑这个代码,也没有任何严肃的测试。
使用。
Month
代码。
Month m = MonthDelocalizer.of( Locale.CANADA_FRENCH ).parse( "janvier" ) ; // Month.JANUARY
java.time框架内置于Java 8及更高版本中。这些类取代了麻烦的旧legacy日期时间类,例如java.util.Date
,Calendar
和&amp; SimpleDateFormat
现在位于Joda-Time的maintenance mode项目建议迁移到java.time类。
要了解详情,请参阅Oracle Tutorial。并搜索Stack Overflow以获取许多示例和解释。规范是JSR 310。
您可以直接与数据库交换 java.time 对象。使用符合JDBC driver或更高版本的JDBC 4.2。不需要字符串,不需要package com.basilbourque.example;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.time.Month;
import java.time.format.TextStyle;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
// For a given name of month in some language, determine the matching `java.time.Month` enum object.
// This class is the opposite of `Month.getDisplayName` which generates a localized string for a given `Month` object.
// Usage… MonthDelocalizer.of( Locale.CANADA_FRENCH ).parse( "janvier" ) → Month.JANUARY
// Assumes `FormatStyle.FULL`, for names without abbreviation.
// About `java.time.Month` enum: https://docs.oracle.com/javase/9/docs/api/java/time/Month.html
// USE AT YOUR OWN RISK. Provided without guarantee or warranty. No serious testing or code review was performed.
public class MonthDelocalizer
{
@NotNull
private Locale locale;
@NotNull
private List < String > monthNames, monthNamesStandalone; // Some languages use an alternate spelling for a “standalone” month name used without the context of a date.
// Constructor. Private, for static factory method.
private MonthDelocalizer ( @NotNull Locale locale )
{
this.locale = locale;
// Populate the pair of arrays, each having the translated month names.
int countMonthsInYear = 12; // Twelve months in the year.
this.monthNames = new ArrayList <>( countMonthsInYear );
this.monthNamesStandalone = new ArrayList <>( countMonthsInYear );
for ( int i = 1 ; i <= countMonthsInYear ; i++ )
{
this.monthNames.add( Month.of( i ).getDisplayName( TextStyle.FULL , this.locale ) );
this.monthNamesStandalone.add( Month.of( i ).getDisplayName( TextStyle.FULL_STANDALONE , this.locale ) );
}
// System.out.println( this.monthNames );
// System.out.println( this.monthNamesStandalone );
}
// Constructor. Private, for static factory method.
// Personally, I think it unwise to default implicitly to a `Locale`. But I included this in case you disagree with me, and to follow the lead of the *java.time* classes. --Basil Bourque
private MonthDelocalizer ( )
{
this( Locale.getDefault() );
}
// static factory method, instead of constructors.
// See article by Dr. Joshua Bloch. http://www.informit.com/articles/article.aspx?p=1216151
// The `Locale` argument determines the human language and cultural norms used in de-localizing input strings.
synchronized static public MonthDelocalizer of ( @NotNull Locale localeArg )
{
MonthDelocalizer x = new MonthDelocalizer( localeArg ); // This class could be optimized by caching this object.
return x;
}
// Attempt to translate the name of a month to look-up a matching `Month` enum object.
// Returns NULL if the passed String value is not found to be a valid name of month for the human language and cultural norms of the `Locale` specified when constructing this parent object, `MonthDelocalizer`.
@Nullable
public Month parse ( @NotNull String input )
{
int index = this.monthNames.indexOf( input );
if ( - 1 == index )
{ // If no hit in the contextual names, try the standalone names.
index = this.monthNamesStandalone.indexOf( input );
}
int ordinal = ( index + 1 );
Month m = ( ordinal > 0 ) ? Month.of( ordinal ) : null; // If we have a hit, determine the `Month` enum object. Else return null.
if ( null == m )
{
throw new java.lang.IllegalArgumentException( "The passed month name: ‘" + input + "’ is not valid for locale: " + this.locale.toString() );
}
return m;
}
// `Object` class overrides.
@Override
public boolean equals ( Object o )
{
if ( this == o ) return true;
if ( o == null || getClass() != o.getClass() ) return false;
MonthDelocalizer that = ( MonthDelocalizer ) o;
return locale.equals( that.locale );
}
@Override
public int hashCode ( )
{
return locale.hashCode();
}
public static void main ( String[] args )
{
// Usage example:
MonthDelocalizer monthDelocJapan = MonthDelocalizer.of( Locale.JAPAN );
try
{
Month m = monthDelocJapan.parse( "pink elephant" ); // Invalid input.
} catch ( IllegalArgumentException e )
{
// … handle error
System.out.println( "ERROR: " + e.getLocalizedMessage() );
}
// Ignore exception. (not recommended)
if ( MonthDelocalizer.of( Locale.CANADA_FRENCH ).parse( "janvier" ).equals( Month.JANUARY ) )
{
System.out.println( "GOOD - In locale "+Locale.CANADA_FRENCH+", the input ‘janvier’ parses to Month.JANUARY." );
}
}
}
类。
从哪里获取java.time类?
ThreeTen-Extra项目使用其他类扩展java.time。该项目是未来可能添加到java.time的试验场。您可以在此处找到一些有用的课程,例如Interval
,YearWeek
,YearQuarter
和more。
答案 8 :(得分:1)
当您使用DateFormatSymbols类为其getMonthName方法获取Month by Name时,在某些Android设备中显示Month by Number时会出现问题。我通过这种方式解决了这个问题:
在String_array.xml
中<string-array name="year_month_name">
<item>January</item>
<item>February</item>
<item>March</item>
<item>April</item>
<item>May</item>
<item>June</item>
<item>July</item>
<item>August</item>
<item>September</item>
<item>October</item>
<item>November</item>
<item>December</item>
</string-array>
在Java类中,只需这样调用此数组:
public String[] getYearMonthName() {
return getResources().getStringArray(R.array.year_month_names);
//or like
//return cntx.getResources().getStringArray(R.array.month_names);
}
String[] months = getYearMonthName();
if (i < months.length) {
monthShow.setMonthName(months[i] + " " + year);
}
快乐编码:)
答案 9 :(得分:0)
public static void main(String[] args) {
SimpleDateFormat format = new SimpleDateFormat("MMMMM", new Locale("en", "US"));
System.out.println(format.format(new Date()));
}
答案 10 :(得分:0)
只需插入行
DateFormatSymbols.getInstance().getMonths()[view.getMonth()]
可以解决问题。
答案 11 :(得分:0)
尝试使用这种非常简单的方法,并像您自己的func一样调用它
public static String convertnumtocharmonths(int m){
String charname=null;
if(m==1){
charname="Jan";
}
if(m==2){
charname="Fev";
}
if(m==3){
charname="Mar";
}
if(m==4){
charname="Avr";
}
if(m==5){
charname="Mai";
}
if(m==6){
charname="Jun";
}
if(m==7){
charname="Jul";
}
if(m==8){
charname="Aou";
}
if(m==9){
charname="Sep";
}
if(m==10){
charname="Oct";
}
if(m==11){
charname="Nov";
}
if(m==12){
charname="Dec";
}
return charname;
}
答案 12 :(得分:0)
Kotlin扩展
fun Int.toMonthName(): String {
return DateFormatSymbols().months[this]
}
用法
calendar.get(Calendar.MONTH).toMonthName()