Java Development is internationalized, java Development is internationalized

Java Development is internationalized, java Development is internationalized

 

1. The static text is internationalized. For example, the user name displayed in Chinese on the page is the user name, and the user name is used for display.

The static file naming rules are as follows: Basic name_language abbreviation _ country abbreviation. properties

The class to be used is

1) import java. util. Locale; // localized
2) import java. util. ResourceBundle; // resource Loading

You can use the internate option to find the language Abbreviation and country abbreviation. As shown in

 

Example:

Create two properties file storage corresponding to the value to be internationalized

The content of the msg_zh_CN.properties file is as follows:

 

The content of the msg_en_US.properties file is as follows:

The test code is as follows:

String baseName = "com.huitong.test.bundle.msg";            ResourceBundle bundle = ResourceBundle.getBundle(baseName, Locale.CHINA);        System.out.println(bundle.getString("username"));

 

2. Internationalization of dynamic content: mainly including digital internationalization, currency internationalization, and date Internationalization

The main class objects are NumberFormat and SimpleDateFormat.

The code for internationalization of 2.1 currencies is as follows:

2.1.1) format the digital currency into a string

Locale locale = Locale. CHINA; double number = 200; // currency internationalization NumberFormat currencyInstance = NumberFormat. getCurrencyInstance (locale); String result = currencyInstance. format (number); System. out. println (result );

2.1.2) format the string into a number. The Code is as follows:

Locale locale = Locale. CHINA; String strNumber = "￥200.00"; // currency internationalization NumberFormat currencyInstance = NumberFormat. getCurrencyInstance (locale); Number result; // String result = currencyInstance. format (dnumber); try {result = currencyInstance. parse (strNumber); System. out. println (result. doubleValue ();} catch (ParseException e) {// TODO Auto-generated catch block e. printStackTrace ();}

 

2.2 digital Internationalization

Format the digital currency into a string

2.2.1) format the number into a string

Locale locale = Locale. CHINA; // number internationalization NumberFormat numberInstance = NumberFormat. getNumberInstance (locale); double num = 2000000.15; String strnum = numberInstance. format (num); System. out. println (strnum );

Result: 2,000,000.15

2.2.2) format the string into a number

Locale locale = Locale. CHINA; // number internationalization NumberFormat numberInstance = NumberFormat. getNumberInstance (locale); // double num = 2000000.15; String strnum = "2,000,000.15"; try {Number result = numberInstance. parse (strnum); System. out. println (result. doubleValue ();} catch (ParseException e) {// TODO Auto-generated catch block e. printStackTrace ();}

Result: 2000000.15

 

2.3 There are two ways to internationalize Date:

2.3.1) When DateFormat is used, the generated formats are fixed, including DateFormat. FULL, DateFormat. LONG, DateFormat. MEDIUM, DateFormat. SHORT.

        int dateStyle = DateFormat.MEDIUM;                int timeStyle = DateFormat.FULL;                Locale aLocale = Locale.CHINA;                DateFormat dateTimeInstance = DateFormat.getDateTimeInstance(dateStyle , timeStyle , aLocale );                String result = dateTimeInstance.format(new Date());                System.out.println(result);

Result: 08:51:28 A.M. CST

 

2.3.2) The SimpleDateFormat format can be used to produce the format specified, which is more autonomous.

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        System.out.println(simpleDateFormat.format(new Date()));

Result: 08:55:20

The format is as follows:

•    
     
  
      
      
   
       
   
        
  Letter
   
        
  Date or Time Component
   
        
  Presentation
   
        
  Examples
   
       
   
       
   
        
  G
   
        
  Era designator
   
        
  Text
   
        
  AD
   
       
   
       
   
        
  y
   
        
  Year
   
        
  Year
   
        
  1996; 96
   
       
   
       
   
        
  Y
   
        
  Week year
   
        
  Year
   
        
  2009; 09
   
       
   
       
   
        
  M
   
        
  Month in year (context sensitive)
   
        
  Month
   
        
  July; Jul; 07
   
       
   
       
   
        
  L
   
        
  Month in year (standalone form)
   
        
  Month
   
        
  July; Jul; 07
   
       
   
       
   
        
  w
   
        
  Week in year
   
        
  Number
   
        
  27
   
       
   
       
   
        
  W
   
        
  Week in month
   
        
  Number
   
        
  2
   
       
   
       
   
        
  D
   
        
  Day in year
   
        
  Number
   
        
  189
   
       
   
       
   
        
  d
   
        
  Day in month
   
        
  Number
   
        
  10
   
       
   
       
   
        
  F
   
        
  Day of week in month
   
        
  Number
   
        
  2
   
       
   
       
   
        
  E
   
        
  Day name in week
   
        
  Text
   
        
  Tuesday; Tue
   
       
   
       
   
        
  u
   
        
  Day number of week (1 = Monday, ..., 7 = Sunday)
   
        
  Number
   
        
  1
   
       
   
       
   
        
  a
   
        
  Am/pm marker
   
        
  Text
   
        
  PM
   
       
   
       
   
        
  H
   
        
  Hour in day (0-23)
   
        
  Number
   
        
  0
   
       
   
       
   
        
  k
   
        
  Hour in day (1-24)
   
        
  Number
   
        
  24
   
       
   
       
   
        
  K
   
        
  Hour in am/pm (0-11)
   
        
  Number
   
        
  0
   
       
   
       
   
        
  h
   
        
  Hour in am/pm (1-12)
   
        
  Number
   
        
  12
   
       
   
       
   
        
  m
   
        
  Minute in hour
   
        
  Number
   
        
  30
   
       
   
       
   
        
  s
   
        
  Second in minute
   
        
  Number
   
        
  55
   
       
   
       
   
        
  S
   
        
  Millisecond
   
        
  Number
   
        
  978
   
       
   
       
   
        
  z
   
        
  Time zone
   
        
  General time zone
   
        
  Pacific Standard Time; PST; GMT-08:00
   
       
   
       
   
        
  Z
   
        
  Time zone
   
        
  RFC 822 time zone
   
        
  -0800
   
       
   
       
   
        
  X
   
        
  Time zone
   
        
  ISO 8601 time zone
   
        
  -08; -0800; -08:00
   
       
   
      
     
     

 

3. International tag

Introduce internationalization labels: <% @ taglib uri = "http://java.sun.com/jsp/jstl/fmt" prefix = "fmt" %>

5 main labels

// Set the localization object as the locale requested by the browser

<Fmt: setLocale value = "$ {pageContext. request. locale}"/>

// Set the tool class

<Fmt: setBundle basename = "com. huitong. i18n. msg" var = "bund"/>

// Obtain the data in the tool class. The key is the key in the properties file.

<Fmt: message bundle = "$ {bund}" key = "title"> </fmt: message>

<Fmt: formatNumber pattern = "0.00" value = "100"> </fmt: formatNumber>

<Fmt: formatDate pattern = "yyyyMMdd" value = "<% = new Date () %>"/>