//带有语言和国际地区信息的 Locale

Locale local1 = new Locale("zh","CN");

//带有语言信息的 Locale

Locale local2 = new Locale("zh");

//等同于 Locale("zh","CN");

Locale locale3 = Locale.CHINA;

//等同于 Locale("zh");

Locale locale4 = Locale.CHINESE;

​

//获取默认Locale

Locale defaultLocale = Locale.getDefault();

Date date = new Date();

Locale locale = new Locale("en","US");

DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.MEDIUM,locale);

String fmtStr = dateFormat.format(date); //fmtStr = "Dec 1, 2017"

Date date = new Date();

Locale locale = new Locale("en","US");

DateFormat dateFormat = DateFormat.getTimeInstance(DateFormat.MEDIUM,locale);

String fmtStr = dateFormat.format(date); //fmtStr = "4:46:21 PM"

Date date = new Date();

Locale locale = new Locale("en","US");

DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM,locale6);

String fmtStr = dateFormat.format(date); //fmtStr = "Dec 1, 2017 4:48:06 PM"

double value = 2333.33;

Locale locale = new Locale("en","US");

NumberFormat numberFmt = NumberFormat.getInstance(locale);

String fmtStr = numberFmt.format(value);  //fmtStr = "2,333.33"

double value = 2333.33;

Locale locale = new Locale("zh","CN");

NumberFormat numberFmt = NumberFormat.getCurrencyInstance(locale);

String fmtStr = numberFmt.format(value);  //fmtStr = "￥2,333.33"

//将一个本地化的货币字符串转化为double类型；

String currStr = "￥2,333.33";

NumberFormat numberFormat = NumberFormat.getCurrencyInstance(Locale.CHINA);

Number num = numberFormat.parse(currStr);

double value = num.doubleValue();   //value=2333.33

//格式化模板字符串

String pattern1 = "{0}，您于 {1,date,short} 支付 {2,number,currency} ";

String pattern2 = "{0} ,you paid {2,number,currency} at {1,date,short} ";

​

//动态替换格式化字符串的占位符的参数

Object[] params = {"Al-assad",new Date(),1.0E3};

​

//使用指定本地化对象格式化信息

MessageFormat  msgFmt1 = new MessageFormat(pattern1,Locale.CHINA);

MessageFormat msgFmt2 = new MessageFormat(pattern2,Locale.US);

String msg1 = msgFmt1.format(params);   //"Al-assad，您于 17-12-1 支付 ￥1,000.00 "

String msg2 = msgFmt2.format(params);   //"Al-assad ,you paid $1,000.00 at 12/1/17 "

resource.properties       //默认资源包，但程序查到不到当地的本地化资源包时，使用该资源包

resource_zh_CN.properties   //中文资源包

resource_en_US.properties   //英文资源包

......

greeting.common=How are you!

greeting.morning=Good Morning!

greeting.afternoon=Good Afternoon!

greeting.common=\u4F60\u597D!

greeting.morning=\u65E9\u4E0A\u597D!

greeting.afternoon=\u4E0B\u5348\u597D\uFF01

        //使用系统用默认Locale获取资源包

        Locale locale = Locale.getDefault();

        ResourceBundle resourceBundle = ResourceBundle.getBundle("site/assad/i18n/resource"); //指定资源包路径，基于类路径

        //获取资源包中的对应键值

        String common = resourceBundle.getString("greeting.common");   //"你好!"

        String morning = resourceBundle.getString("greeting.morning");  //"早上好!"

        String afternoon = resourceBundle.getString("greeting.afternoon");  //"下午好!"

​

        //指定Locale获取资源包

        ResourceBundle resourceBundle2 = ResourceBundle.getBundle("site/assad/i18n/resource",Locale.US);

        String common2 = resourceBundle2.getString("greeting.common");   //"How are you!"

​

greeting.common=How are you!{0},today is {1,date,short}

greeting.morning=Good morning!{0},now is {1,time,short}

greeting.afternoon=Good afternoon!{0},now is{1,time,short}

//加载本地化资源

ResourceBundle resourceBundle1 = ResourceBundle.getBundle("site/assad/i18n/fmt_resource",Locale.US);

ResourceBundle resourceBundle2 = ResourceBundle.getBundle("site/assad/i18n/fmt_resource",Locale.CHINA);

​

//动态替换占位符参数

Object[] params = {"Al-assad",new Date()};

​

//获取本地化键值，并对其进行格式化

String common1 = new MessageFormat(resourceBundle1.getString("greeting.common"),Locale.US).format(params);

String morning1 = new MessageFormat(resourceBundle1.getString("greeting.morning"),Locale.US).format(params);

String afternoon1 = new MessageFormat(resourceBundle1.getString("greeting.afternoon"),Locale.US).format(params);

​

String common2 = new MessageFormat(resourceBundle2.getString("greeting.common"),Locale.CHINA).format(params);

String morning2 = new MessageFormat(resourceBundle2.getString("greeting.morning"),Locale.CHINA).format(params);

String afternoon2 = new MessageFormat(resourceBundle2.getString("greeting.afternoon"),Locale.CHINA).format(params);

​

System.out.println(common1+"\n"+morning1+"\n"+afternoon1+"\n"+common2+"\n"+morning2+"\n"+afternoon2);

 /*output:

 How are you!Al-assad,today is 12/1/17

 Good morning!Al-assad,now is 2:22 PM

 Good afternoon!Al-assad,now is2:22 PM

 你好!Al-assad,今天是 17-12-1

 上午好!Al-assad,现在的时间是 下午2:22

 下午好!Al-assad,现在的时间是 下午2:22

 * */