Java国际化和Spring国际化比较

1.Java本身框架国际化

(1)本地化相关的类

Locale

NumberFormat

DateFormat

MessageFormat

(2)使用ResourceBoundle

国际化资源命名规范：

<资源名>_<语言代码>_<国家/地区代码>.properties

如:

resource.properties

resource_zh_CN.properties

resource_en_US.properties

 

 使用例子

 

package com.baobaotao.i18n;

import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.NumberFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.ResourceBundle;

public class LocaleSample {
	public static void numberFormat() {
		Locale locale = new Locale("zh", "CN");
		NumberFormat currFmt = NumberFormat.getCurrencyInstance(locale);
		double amt = 123456.78;
		System.out.println(currFmt.format(amt));
	}
	public static void dateFormat() {
		Locale locale = new Locale("en", "US");
		Date date = new Date();
		DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, locale);
		System.out.println(df.format(date));
	}

	public static void messageFormat1() {
		Object[] params = {"John", new GregorianCalendar().getTime(),1.0E3};
		String pattern1 = "{0}，你好！你于{1}在工商银行存入{2} 元。";
		String pattern2 = "At {1,time,short} On{1,date,long}，{0} paid {2,number,currency}.";
		
		String msg1 = MessageFormat.format(pattern1,params);
		MessageFormat mf = new MessageFormat(pattern2,Locale.US);
		String msg2 = mf.format(params);
		System.out.println(msg1);
		System.out.println(msg2);
	}
	
	public static void resourceBoundle(){
		ResourceBundle rb1 = ResourceBundle.getBundle("com/baobaotao/i18n/resource",Locale.US);
		ResourceBundle rb2 = ResourceBundle.getBundle("com/baobaotao/i18n/resource",Locale.CANADA);
		System.out.println("us:"+rb1.getString("greeting.common"));
		System.out.println("cn:"+rb2.getString("greeting.common"));
	}
	
	public static void resourceBoundleFmt(){
		ResourceBundle rb1 = ResourceBundle.getBundle("com/baobaotao/i18n/fmt_resource",Locale.US);
		ResourceBundle rb2 = ResourceBundle.getBundle("com/baobaotao/i18n/fmt_resource",Locale.CHINA);
		Object[] params = {"John", new GregorianCalendar().getTime()};
		
		String str1 = new MessageFormat(rb1.getString("greeting.common"),Locale.US).format(params);
		String str2 =new MessageFormat(rb2.getString("greeting.morning"),Locale.CHINA).format(params);
		String str3 =new MessageFormat(rb2.getString("greeting.afternoon"),Locale.CHINA).format(params);
		System.out.println(str1);
		System.out.println(str2);
		System.out.println(str3);
	}	
	public static void main(String[] args) {
		numberFormat();
		dateFormat();
		messageFormat1();
		resourceBoundle();
		resourceBoundleFmt();
	}
}

 resource.properties

 

greeting.common=How are you!
greeting.morning = Good morning!
greeting.afternoon =Good Afternoon\!

 fmt_resource.properties

 

 

greeting.common=How are you!{0},today is {1}
greeting.morning = Good morning!{0},now is {1,time,short}
greeting.afternoon =Good Afternoon\!{0} now is {1,date,long}

 

 2.Spring国际化

相关的接口及类:

（1）接口：MessageSource

（2）类：ResourceBundleMessageSource

通过beanName指定一个资源名

（3）类：ReloadableResourceBundleMessageSource

可以定时刷新资源文件

（4）容器级的国际化

Application实现了MessageSource接口，要配置文件中的Bean的名称必须为"messageSource".

 

Spring xml配置 bean.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
  <bean id="myResource1" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basenames">
       <list>
         <value>com/baobaotao/i18n/fmt_resource</value>
       </list>
    </property>
  </bean> 
  
  <bean id="myResource2" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basenames">
       <list>
         <value>com/baobaotao/i18n/fmt_resource</value>
       </list>
    </property>
    <property name="cacheSeconds" value="2"/>
  </bean>  
  
   <bean id="messageSource12" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basenames">
       <list>
         <value>com/baobaotao/i18n/fmt_resource</value>
       </list>
    </property>
  </bean>  
  
  <!-- 容器级国际化，名称只能为messageSource -->
  <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basenames">
       <list>
         <value>com/baobaotao/i18n/fmt_resource</value>
       </list>
    </property>
  </bean>  
  
</beans>

 

 

Java code:

 

package com.baobaotao.i18n;

import java.text.MessageFormat;
import java.util.GregorianCalendar;
import java.util.Locale;

import org.springframework.context.ApplicationContext;
import org.springframework.context.MessageSource;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class I18nGreeting {
   
	private static void rsrBdlMessageResource(){
		String[] configs = {"com/baobaotao/i18n/beans.xml"};
		ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);
		
		MessageSource ms = (MessageSource)ctx.getBean("myResource1");
		Object[] params = {"John", new GregorianCalendar().getTime()};
		
		String str1 = ms.getMessage("greeting.common",params,Locale.US);
		String str2 = ms.getMessage("greeting.morning",params,Locale.CHINA);
		String str3 = ms.getMessage("greeting.afternoon",params,Locale.CHINA);
		System.out.println(str1);
		System.out.println(str2);
		System.out.println(str3);
		
	}
	private static void rrsrBdlMessageResource() throws Exception{
		String[] configs = {"com/baobaotao/i18n/beans.xml"};
		ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);
		
		MessageSource ms = (MessageSource)ctx.getBean("myResource2");
		Object[] params = {"John", new GregorianCalendar().getTime()};
		
		for (int i = 0; i < 2; i++) {
			String str1 = ms.getMessage("greeting.common",params,Locale.US);		
			System.out.println(str1);
			Thread.currentThread().sleep(20000);
		}	
	}
	
	private static void ctxMessageResource() throws Exception{
		String[] configs = {"com/baobaotao/i18n/beans.xml"};
		ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);
		Object[] params = {"John", new GregorianCalendar().getTime()};
		
		String str1 = ctx.getMessage("greeting.common",params,Locale.US);
		String str2 = ctx.getMessage("greeting.morning",params,Locale.CHINA);	
		System.out.println(str1);
		System.out.println(str2);	
	}	
	
	public static void main(String[] args) throws Exception{
//		rsrBdlMessageResource();
//		rrsrBdlMessageResource();
		ctxMessageResource();
	}
}