如何使用Spring的i18n机制? [英] How to use Spring's i18n mechanism?

问题描述

我在我的Spring项目中添加了本地化，它似乎正在工作，但是我想知道如何更改语言，如果基于浏览器设置，HTTP标头，Cookie或其他方式完成了语言选择.是否有一种明确的方法，例如以例如hl=de是否在HTTP查询字符串上?我还希望允许用户在设置页面上设置语言，我该怎么做?我的实现看起来像这样，并用英语编写消息:

I added localization to my Spring project and it appears to be working but I wonder how I change the language, if the language choice is done based on the browser setting, the HTTP header, a cookie or something else. Is there a way to be explicit as well e.g. taking the locale as a parameter in a way like e.g. hl=de on the HTTP query string? I also want to allow the user to set the language on a settings page, how can I do that? My implementation looks like this and writes messages in English:

<h4 class="title"><fmt:message key="login.title"/></h4>

servlet.xml:

servlet.xml:

<bean id="messageSource"
      class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="classpath:messages" />
    <property name="defaultEncoding" value="UTF-8"/>
</bean>

<bean id="localeChangeInterceptor"
      class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
    <property name="paramName" value="lang" />
</bean>

<bean id="localeResolver"
      class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
    <property name="defaultLocale" value="en"/>
</bean>

<bean id="handlerMapping"
      class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="interceptors">
        <ref bean="localeChangeInterceptor" />
    </property>
</bean>

那我怎么

a)通过启用HTTP GET参数(例如，德语为hl=de，法语为hl=fr)来覆盖语言环境来使语言环境选择显式吗?

a) Make the locale choice explicit by enabling overriding the locale with a HTTP GET parameter such as hl=de for German and hl=fr for French?

b)让用户选择语言环境吗?

b) Let a user choose locale?

拦截器不起作用. XML是:

The interceptor is not working. The XML is:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <bean id="messageSource"
          class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="classpath:messages" />
        <property name="defaultEncoding" value="UTF-8"/>
    </bean>
    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
    <property name="defaultLocale" value="sv" />
</bean>

    <mvc:interceptors>
        <bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
            <property name="paramName" value="language" />
        </bean>
    </mvc:interceptors>

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- one of the properties available; the maximum file size in bytes -->
        <property name="maxUploadSize" value="100000"/>
    </bean>

</beans>

推荐答案

a)您定义了一个ID为localeChangeInterceptor的bean:

a) you defined a bean with id localeChangeInterceptor:

<bean id="localeChangeInterceptor"
      class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
    <property name="paramName" value="lang" />
</bean>

此拦截器使您可以使用查询字符串(即:

this interceptor enable you to change your locale using the param you choose (in this case: "lang") in your query string (ie: http://mydomain.com/mypage?lang=fr for french)

b)您可以使用a)点为用户提供用于更改语言环境的链接 c)您选择了默认语言环境:"en".使用浏览器语言选择其他语言环境

b) you can provide users link for changing locale using point a) c) you selected a default locale: "en". otherwhise locale is choosen using browser language

注意:您应该对本地化的字符串而不是fmt使用<spring:message code="${msg.value}" arguments="${msg.args}"/>，以便与spring进行更多集成...

NOTE: you should use <spring:message code="${msg.value}" arguments="${msg.args}"/>for your localized string, not fmt, for more integration with spring...

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