<fmt:setLocale> Tag

JSP 标准标签库JSP Standard Tag Library

The <fmt:setLocale> tag is used to store the given locale in the locale configuration variable.

Syntax Format

<fmt:setLocale value="<string>" variant="<string>" scope="<string>"/>

Attributes

The <fmt:setLocale> tag has the following attributes:

Attribute Description Required Default Value
value Specifies the ISO-639 language code and ISO-3166 country code Yes en_US
variant Browser-specific variant no None
scope Scope of the locale configuration variable no Page

Program Example

Resource bundles contain locale-specific objects. Resource bundles contain key-value pairs. When your program needs locale-specific resources, you can share all key-value pairs across all locales, but you can also specify translated values for a locale. Resource bundles help provide locale-specific content.

A Java resource bundle file contains a series of key-value pairs. The method we are concerned with involves creating compiled Java classes that inherit from the java.util.ListResourceBundle class. You must compile these classes and place them in the CLASSPATH of your Web application.

Let us define a default resource bundle:

package com.example;

import java.util.ListResourceBundle;

public class Example_En extends ListResourceBundle {
  public Object[][] getContents() {
    return contents;
  }
  static final Object[][] contents = {
  {"count.one", "One"},
  {"count.two", "Two"},
  {"count.three", "Three"},
  };
}

Now, define another resource bundle for the Spanish Locale:

package com.example;

import java.util.ListResourceBundle;

public class Example_es_ES extends ListResourceBundle {
  public Object[][] getContents() {
    return contents;
  }
  static final Object[][] contents = {
  {"count.one", "Uno"},
  {"count.two", "Dos"},
  {"count.three", "Tres"},
  };
}

Compile the above files into Examble.class and Examble_es_ES.class, then place them in the CLASSPATH of the Web application. Now you can use JSTL tags to display these three numbers, like this:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<html>
<head>
<title>JSTL fmt:setLocale 标签</title>
</head>
<body>

<fmt:bundle basename="com.example.Example">
   <fmt:message key="count.one"/><br/>
   <fmt:message key="count.two"/><br/>
   <fmt:message key="count.three"/><br/>
</fmt:bundle>

<!-- 修改地区-->
<fmt:setLocale value="es_ES"/>
<fmt:bundle basename="com.example.Example">
   <fmt:message key="count.one"/><br/>
   <fmt:message key="count.two"/><br/>
   <fmt:message key="count.three"/><br/>
</fmt:bundle>

</body>
</html>

The output is as follows:

One 
Two 
Three
Uno
Dos
Tres

See<fmt:bundle>and<setBundle>for more information.

JSP 标准标签库JSP Standard Tag Library

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