请原谅我，如果之前已经问过这个问题，但我没有得到一个直接的答案，帮助我解决了我的问题。 我有一个使用spring-security保护的gwt应用程序。 Spring安全性只是验证用户身份并重定向到gwt应用程序。现在我希望用户能够从登录页面上的链接更改区域设置，之后区域设置将存储在cookie上并在应用程序中使用。
我的applicationContext.xml
中有以下配置<http auto-config="true">
<intercept-url pattern="/mywebapp/**" access="ROLE_USER"/>
<intercept-url pattern="/gwt/**" access="ROLE_USER"/>
<intercept-url pattern="/**/*.html" access="ROLE_USER"/>
<intercept-url pattern="/**" access="IS_AUTHENTICATED_ANONYMOUSLY" />
<intercept-url pattern="/login.jsp*" access="IS_AUTHENTICATED_ANONYMOUSLY"/>
<form-login login-page="/login.jsp"/>
</http>
<beans:bean id="userDetailsService"
class="com.kibet.mywebapp.server.auth.UserDetailsServiceImpl">
</beans:bean>
...
<!-- Application Message Bundle -->
<beans:bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<beans:property name="basename" value="classpath:messages" />
<beans:property name="defaultEncoding" value="UTF-8"/>
</beans:bean>
<beans:bean id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<beans:property name="paramName" value="lang" />
</beans:bean>
<beans:bean id="localeResolver"
class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<beans:property name="defaultLocale" value="pt"/>
</beans:bean>
<beans:bean id="urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<beans:property name="interceptors">
<beans:list>
<beans:ref bean="localeChangeInterceptor"/>
</beans:list>
</beans:property>
<beans:property name="mappings">
<beans:value>/login.jsp=userDetailsService</beans:value>
</beans:property>
</beans:bean>
这似乎不起作用。我的类路径中有locale属性文件messages_en.properties，messages_es.properties和messages_pt.properties。它唯一有效的时间是我更改浏览器的默认语言环境。 据我所知，登录页面是由spring-security生成的，处理程序映射不能拦截语言环境更改请求。如果这就是我如何解决这个问题的原因？非常感谢帮助。
这是我的自定义过滤器代码。
public class InternationalizationFilter implements Filter {
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) throws IOException, ServletException {
String newLocale = request.getParameter("lang");
if (newLocale != null) {
Locale locale = StringUtils.parseLocaleString(newLocale
.toLowerCase());
LocaleContextHolder.setLocale(locale);
}
try {
filterChain.doFilter(request, response);
} finally {
LocaleContextHolder.resetLocaleContext();
}
}
@Override
public void init(FilterConfig arg0) throws ServletException {
}}
答案 0 :(得分：4)
感谢@Ritesh给出答案。 你给我一个想法来处理这个问题。 我在另一个方面解决了这个问题：
public class InternationalizationFilter extends OncePerRequestFilter {
private Logger log=Logger.getLogger(InternationalizationFilter.class);
private String localeParam="lang";
private LocaleResolver localeResolver;
public InternationalizationFilter(String localeParam, LocaleResolver localeResolver) {
this.localeParam = localeParam;
this.localeResolver = localeResolver;
}
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
protected void doFilterInternal(
final HttpServletRequest request,
final HttpServletResponse response,
final FilterChain filterChain)
throws ServletException, IOException {
if (localeResolver == null) {
throw new IllegalStateException("No LocaleResolver found: not in a DispatcherServlet request?");
}
else{
final String newLocale = request.getParameter(localeParam);
if (newLocale != null) {
final Locale locale = StringUtils.parseLocaleString(newLocale.toLowerCase());
LocaleContextHolder.setLocale(locale);
LocaleEditor localeEditor = new LocaleEditor();
localeEditor.setAsText(newLocale);
localeResolver.setLocale(request, response, (Locale) localeEditor.getValue());
log.debug("change locale to "+
locale.getLanguage()+"_"+locale.getCountry()+
" at Thread"+Thread.currentThread().getId());
}
else{
final Locale locale=localeResolver.resolveLocale(request);
LocaleContextHolder.setLocale(locale);
log.debug("restore locale to "+
locale.getLanguage()+"_"+locale.getCountry()+
" at Thread"+Thread.currentThread().getId());
}
try {
filterChain.doFilter(request, response);
} finally {
LocaleContextHolder.resetLocaleContext();
}
}
}
}
在mvc配置文件中声明localChangeInterceptor和localeResolver。 因此，我们可以使用请求参数“lang”更改语言环境：
<mvc:interceptors>
<bean id="localChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="lang"/>
</bean>
</mvc:interceptors>
<!--localeResolver-->
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<!--<property name="cookieDomain" value=""/>-->
<property name="defaultLocale" value="zh"/>
</bean>
在安全配置文件中，我创建了一个i18nFilter并将其添加到Filter Chain：
<bean id="springSecurityFilterChain" class="org.springframework.security.web.FilterChainProxy">
<security:filter-chain-map path-type="ant">
<security:filter-chain pattern="/**/*.css" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.jpg" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.png" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.gif" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.js" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.cur" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/**/*.swf" filters="
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/login" filters="
i18nFilter,
securityContextPersistenceFilter,
exceptionTranslationFilter"/>
<security:filter-chain pattern="/checkin" filters="
i18nFilter,
securityContextPersistenceFilter,
authenticationFilter"/>
<security:filter-chain pattern="/**" filters="
i18nFilter,
securityContextPersistenceFilter,
authenticationFilter,
logoutFilter,
anonymousAuthenticationFilter,
exceptionTranslationFilter,
filterSecurityInterceptor" />
</security:filter-chain-map>
</bean>
<bean id="i18nFilter" class="com.bjinfotech.filter.InternationalizationFilter">
<constructor-arg name="localeParam" value="lang"/>
<constructor-arg name="localeResolver" ref="localeResolver"/>
</bean>
使用localChangeInterceptor＆amp; localeResolver，我可以更改语言环境并将语言环境保存到会话或cookie中。
在localeResolver的帮助下，InternationalizationFilter可以存储/恢复语言环境并更改LocaleContextHolder的语言环境。
答案 1 :(得分：1)
LocaleChangeInterceptor是Spring MVC的一部分，这意味着它们不会出现在Spring安全过滤器中。您必须在过滤器链中自己设置区域设置。另请参阅Spring Security/SEC-1527: Internationalize one of the sample applications
答案 2 :(得分：1)
首先，关键是LocaleResolver并忘记拦截器。
只需创建一个实现此接口的bean来解析保存它的区域设置，例如来自请求属性的示例。
public class LocaleResolverImpl implements LocaleResolver {
public LocaleResolverImpl() {
}
@Override
public Locale resolveLocale(HttpServletRequest request) {
Locale r = (Locale) request.getAttribute("localeObject");
return r == null ? request.getLocale() : r;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
throw new UnsupportedOperationException("Not supported yet.");
}
}