当我使用时，为什么我的 JSP 没有以德语 (de_DE) 语言环境显示？
我创建了以下 JSP：
<!-- WebContent/pages/ResourceBundlesJST.jsp -->
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.text.*" %>
<%@ page import="java.util.*" %>
<%@ page import="hu.flux.locale.LanguageToolkit" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
Locale locale = LanguageToolkit.getLanguage(request);
//String locale = LanguageToolkit.getLanguageString(request);
%>
<fmt:setLocale value="${locale}" />
<fmt:bundle basename="hu.flux.locale.resources.TestResources">
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1><fmt:message key="greetHeading"/></h1>
<p><fmt:message key="welcomeText"/></p>
<p>Your locale is <%= locale %>.</p>
<form action="your_form_handler_here" method="post">
<div>
<label for="name"><fmt:message key="namePrompt"/></label>
<input type="text" id="name" name="name">
</div>
<div>
<label for="age"><fmt:message key="agePrompt"/></label>
<input type="text" id="age" name="age">
</div>
<div>
<label for="place"><fmt:message key="placePrompt"/></label>
<input type="text" id="place" name="place">
</div>
<input type="submit" value="<fmt:message key="submitButtonText"/>">
</form>
</body>
</html>
</fmt:bundle>
当我尝试访问具有此 URL 的页面时：
http://localhost:8080/SamsTeachYourselfJSP/pages/ResourceBundlesJSTL.jsp?languageOverride=de_DE
屏幕上会显示以下内容：
Hello!
Welcome to our web site. Please take a moment to fill out our survey
Your locale is de_DE.
What is your name:
How old are you:
Where do you live:
即使服务器获取了我的参数，该页面显然也在查找并使用英语属性文件而不是德语属性文件将语言环境设置为 de_DE 并接受设置语言环境的命令。
我希望它调用的资源包含：
# /src/hu/flux/locale/resources/TestResources_de.properties
namePrompt=Wie hei[gb]en Sie:
agePrompt=Wie alt sind Sie:
placePrompt=Wo wohnen Sie:
greetHeading=Guten Tag!
welcomeText= Willkommen bei unserer Web-Site. Bitte, dauern Sie einen Moment Um unsere Umfrage auszufüllen
submitButtonText=Senden
我很确定问题不在我的 LanguageToolkit 类中，因为它适用于此页面的非 JSTL 版本，但如果有人想看到它：
/**
* /src/hu/flux/locale/LanguageToolkit.java
*/
package hu.flux.locale;
import java.util.Locale;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
/**
* @author Brian Kessler
*
*/
public class LanguageToolkit {
/**
*
*/
public LanguageToolkit() {
// TODO Auto-generated constructor stub
}
public static Locale getLanguage(HttpServletRequest request)
{
Locale locale = Locale.getDefault();
// Get the browser's preferred language.
String acceptLangString = request.getHeader("ACCEPT-LANGAUGE");
// Allow the user to override the browser's langauge setting.
// This lets you test with tools such as Babelfish
// (which isn't that great at translating to begin with).
String override = request.getParameter ("languageOverride");
if (override != null) { acceptLangString = override; }
// If there is an ACCEPT-LANGUAGE header, parse it.
if (acceptLangString != null)
{
Locale acceptedLocale = parseLangString (acceptLangString);
if (acceptedLocale != null) {locale = acceptedLocale;}
}
return locale;
}
public static String getLanguageString(HttpServletRequest request)
{
String locale = "EN-uk";
// Get the browser's preferred language.
String acceptLangString = request.getHeader("ACCEPT-LANGAUGE");
// Allow the user to override the browser's langauge setting.
// This lets you test with tools such as Babelfish
// (which isn't that great at translating to begin with).
String override = request.getParameter ("languageOverride");
if (override != null) { acceptLangString = override; }
// If there is an ACCEPT-LANGUAGE header, parse it.
if (acceptLangString != null) {locale = acceptLangString;}
return locale;
}
private static Locale parseLangString(String acceptLangString)
{
// The accepted languages should be separated by commas, but also
// add space as a separator to eliminate whitespace.
StringTokenizer localeParser = new StringTokenizer(acceptLangString, " ,");
// See whether there is a language in the list (you need only the first one).
if (localeParser.hasMoreTokens())
{
// Get the locale.
String localeStr = localeParser.nextToken();
// The local should be in the format ll-CC where 11 is the language
// and CC is the country, like en-US for English in the U.S. and
// de-DE for German in Germany. Allow the browser to use _ instead
// of -, too.
StringTokenizer localeSplitter = new StringTokenizer (localeStr, "_-");
// Assume both values are blank.
String language = "";
String country = "";
// See whether a language is specified.
if (localeSplitter.hasMoreTokens()) {language = localeSplitter.nextToken(); }
// See whether a country is specified (there won't always be one).
if (localeSplitter.hasMoreTokens()) {country = localeSplitter.nextToken(); }
// Create a local based on this language and country (if country is blank,
// you'll still get locale-based text, but currencies won't display correctly.
return (new Locale(language, country));
}
return null;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
任何想法为什么我看到英文，如何解决？
I've created the following JSP:
<!-- WebContent/pages/ResourceBundlesJST.jsp -->
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.text.*" %>
<%@ page import="java.util.*" %>
<%@ page import="hu.flux.locale.LanguageToolkit" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
Locale locale = LanguageToolkit.getLanguage(request);
//String locale = LanguageToolkit.getLanguageString(request);
%>
<fmt:setLocale value="${locale}" />
<fmt:bundle basename="hu.flux.locale.resources.TestResources">
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1><fmt:message key="greetHeading"/></h1>
<p><fmt:message key="welcomeText"/></p>
<p>Your locale is <%= locale %>.</p>
<form action="your_form_handler_here" method="post">
<div>
<label for="name"><fmt:message key="namePrompt"/></label>
<input type="text" id="name" name="name">
</div>
<div>
<label for="age"><fmt:message key="agePrompt"/></label>
<input type="text" id="age" name="age">
</div>
<div>
<label for="place"><fmt:message key="placePrompt"/></label>
<input type="text" id="place" name="place">
</div>
<input type="submit" value="<fmt:message key="submitButtonText"/>">
</form>
</body>
</html>
</fmt:bundle>
When I try to visit the page with this URL:
http://localhost:8080/SamsTeachYourselfJSP/pages/ResourceBundlesJSTL.jsp?languageOverride=de_DE
This is displayed to the screen:
Hello!
Welcome to our web site. Please take a moment to fill out our survey
Your locale is de_DE.
What is your name:
How old are you:
Where do you live:
The page is evidently finding and using the English properties file instead of the German one even though the server picked up my parameter to set the locale to de_DE and accepted the command to set the locale.
The resource I expect it to call contains:
# /src/hu/flux/locale/resources/TestResources_de.properties
namePrompt=Wie hei[gb]en Sie:
agePrompt=Wie alt sind Sie:
placePrompt=Wo wohnen Sie:
greetHeading=Guten Tag!
welcomeText= Willkommen bei unserer Web-Site. Bitte, dauern Sie einen Moment Um unsere Umfrage auszufüllen
submitButtonText=Senden
I'm pretty sure the problem isn't in my LanguageToolkit class since that works fine with a non-JSTL version of this page, but if anyone wants to see it:
/**
* /src/hu/flux/locale/LanguageToolkit.java
*/
package hu.flux.locale;
import java.util.Locale;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
/**
* @author Brian Kessler
*
*/
public class LanguageToolkit {
/**
*
*/
public LanguageToolkit() {
// TODO Auto-generated constructor stub
}
public static Locale getLanguage(HttpServletRequest request)
{
Locale locale = Locale.getDefault();
// Get the browser's preferred language.
String acceptLangString = request.getHeader("ACCEPT-LANGAUGE");
// Allow the user to override the browser's langauge setting.
// This lets you test with tools such as Babelfish
// (which isn't that great at translating to begin with).
String override = request.getParameter ("languageOverride");
if (override != null) { acceptLangString = override; }
// If there is an ACCEPT-LANGUAGE header, parse it.
if (acceptLangString != null)
{
Locale acceptedLocale = parseLangString (acceptLangString);
if (acceptedLocale != null) {locale = acceptedLocale;}
}
return locale;
}
public static String getLanguageString(HttpServletRequest request)
{
String locale = "EN-uk";
// Get the browser's preferred language.
String acceptLangString = request.getHeader("ACCEPT-LANGAUGE");
// Allow the user to override the browser's langauge setting.
// This lets you test with tools such as Babelfish
// (which isn't that great at translating to begin with).
String override = request.getParameter ("languageOverride");
if (override != null) { acceptLangString = override; }
// If there is an ACCEPT-LANGUAGE header, parse it.
if (acceptLangString != null) {locale = acceptLangString;}
return locale;
}
private static Locale parseLangString(String acceptLangString)
{
// The accepted languages should be separated by commas, but also
// add space as a separator to eliminate whitespace.
StringTokenizer localeParser = new StringTokenizer(acceptLangString, " ,");
// See whether there is a language in the list (you need only the first one).
if (localeParser.hasMoreTokens())
{
// Get the locale.
String localeStr = localeParser.nextToken();
// The local should be in the format ll-CC where 11 is the language
// and CC is the country, like en-US for English in the U.S. and
// de-DE for German in Germany. Allow the browser to use _ instead
// of -, too.
StringTokenizer localeSplitter = new StringTokenizer (localeStr, "_-");
// Assume both values are blank.
String language = "";
String country = "";
// See whether a language is specified.
if (localeSplitter.hasMoreTokens()) {language = localeSplitter.nextToken(); }
// See whether a country is specified (there won't always be one).
if (localeSplitter.hasMoreTokens()) {country = localeSplitter.nextToken(); }
// Create a local based on this language and country (if country is blank,
// you'll still get locale-based text, but currencies won't display correctly.
return (new Locale(language, country));
}
return null;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
Any ideas why I am seeing English and how to fix it?
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评论（1）
有两个问题：
首先，
fmt:setLocaleTLDDOC 表示以下内容：换句话说，您无法使用
java.util.Locale设置它。其次，使用 scriptlet 声明的任何内容都无法在 EL 中访问。 EL 只能访问由其
放置在PageContext、HttpServletRequest、HttpSession或ServletContext中的属性setAttribute() 方法。在幕后，EL 基本上做了一个pageContext.findAttribute(name)表示${name}。按照从最少到最佳推荐的顺序，基本上有 4 种解决方案：request.setAttribute("locale", locale);将区域设置置于请求范围内。LanguageToolkit声明为 EL 函数。Filter。也就是说，我建议使用
HttpServletRequest#getLocale()而不是手动解析请求头。正确的算法比您目前的算法更复杂。There are 2 problems:
First, the
fmt:setLocaleTLDDOC says the following:In other words, you can't set it with a
java.util.Locale.Second, anything which is been declared using scriptlets cannot be accessed in EL. EL can only access attributes which are been placed in
PageContext,HttpServletRequest,HttpSessionorServletContextby itssetAttribute()method. Under the covers, EL basically does apageContext.findAttribute(name)for a${name}. There are basically 4 solutions in order from least to best recommendation:<fmt:setLocale>.request.setAttribute("locale", locale);inside scriptlet.LanguageToolkitas an EL function.Filterwhich does the job.That said, I would recommend to use
<fmt:setBundle>instead of<fmt:bundle>in this particular case since you seem want to cover the entire page. I would also recommend to useHttpServletRequest#getLocale()instead of manually parsing the request header. The correct algorithm is more complex than what you've as far.