java.text.MessageFormat的使用

最新推荐文章于 2024-01-22 15:20:56 发布

最新推荐文章于 2024-01-22 15:20:56 发布 · 856 阅读

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本文通过一个具体示例展示了如何使用 Java 的 MessageFormat 类来格式化包含日期、时间和数值的消息。MessageFormat 是一种强大的工具，用于创建国际化应用程序，允许开发者定义带有占位符的消息模板。

MessageFormat 类用来格式化消息。非常的好用

import java.util.*;
import java.text.*;

public class MessageFormatDemo {

   static  void displayMessage(Locale currentLocale) {

      System.out.println("currentLocale = " + currentLocale.toString());
      System.out.println();

      Object[] messageArguments = {
         "Mars",
         new Integer(7),
         new Date()
      };

      MessageFormat formatter = new MessageFormat("");
      formatter.setLocale(currentLocale);
      
      String template = "At {2,time,short} on {2,date,long}, we detected " +
      		"{1,number,integer} spaceships on the planet {0}.";

      formatter.applyPattern(template);
      String output = formatter.format(messageArguments);

      System.out.println(output);

   }

   static public void main(String[] args) {
      displayMessage(new Locale("en", "US"));
   }
}

tempate 参数说明

Arguments for template
Argument	Description
{2,time,short}	The time portion of a Dateobject. The short style specifies theDateFormat.SHORT formatting style.
{2,date,long}	The date portion of a Dateobject. The same Dateobject is used for both the date and time variables. In the Objectarray of arguments the index of the element holding the Date object is 2. (This is described in the next step.)
{1,number,integer}	A Number object, further qualified with the integernumber style.