【java】读取资源文件key->value，java.util.ResourceBundle

 package 国际化;
 
 import java.util.ResourceBundle;
 
 public class TestResource {
     public static void main(String[] args) {
         ResourceBundle rb=ResourceBundle.getBundle("TestResource");
         System.out.println(rb.getString("name"));
     }
 }

前提：需要在project的src目录下建立TestResource.properties文件，并输入内容key-value

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 package 国际化;
 
 import java.text.MessageFormat;
 import java.util.ResourceBundle;
 
 public class TestResource {
     public static void main(String[] args) {
         ResourceBundle rb=ResourceBundle.getBundle("TestResource");
         String str=rb.getString("info");//含有占位符{0}、{1}
         System.out.println(MessageFormat.format(str, "中国","北京"));
         //运行结果：country:中国,城市：北京
     }
 }

占位符的使用

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System.out.println(Locale.getDefault());//zh_CN 取得当前语言环境

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 package 国际化;
 
 import java.util.Locale;
 import java.util.ResourceBundle;
 
 public class TestResource {
     public static void main(String[] args) {
         Locale locale=new Locale("zh","CN");
         ResourceBundle rb=ResourceBundle.getBundle("TestResource", locale);
         String str=rb.getString("info");
         System.out.println(str);
 
         Locale locale2=new Locale("en","US");
         ResourceBundle rb2=ResourceBundle.getBundle("TestResource", locale2);
         String str2=rb2.getString("info");
         System.out.println(str2);
 
         ResourceBundle rb3=ResourceBundle.getBundle("TestResource");
         //若未指定Locale则默认取当前语言的Locale，此处默认为zh_CN
         //若无TestResource_zh_CN_properties文件，则取TestResource.properties
         String str3=rb3.getString("info");
         System.out.println(str3);
     }
 }

Locale的使用