springMVC源码分析--国际化实现Session和Cookie(二)
2017-03-07 09:23
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上一篇博客 springMVC源码分析--国际化LocaleResolver(一)中我们介绍了springMVC提供的国际化的解决方案,接下来我们根据springMVC提供的解决方案来简单的实现一个多语言的支持。
一、基于Session的国际化实现
基于Session的国际化实现其实说来也简单,就是在Session中保存语言信息Locale,这样springMVC会从我们提供的多语言配置文件中读取相关语言的信息。
(1)首先我们需要配置springMVC的多语言配置,因为我们打算使用Session来实现,所有对于localeResolver我们要配置其实现类SessionLocaleResolver,在springMVC的配置文件中添加如下配置:
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<span style="font-size:14px;"><bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/></span>
(2)这里我们提供了一个多语言拦截器LanguageInterceptor,通过这个拦截器设置多语言信息,其实主要的代码就是request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale),这样springMVC会根据Locale的信息来获得多语言。
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<span style="font-size:14px;"> public class LanguageInterceptor implements HandlerInterceptor{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
String language = request.getParameter("language");
if (language != null&&language.equals("zh")) {
Locale locale = new Locale("zh", "CN");
request.getSession()
.setAttribute(
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
locale);
request.setAttribute("language", language);
} else if (language != null&&language.equals("en")) {
Locale locale = new Locale("en", "US");
request.getSession()
.setAttribute(
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
locale);
request.setAttribute("language", language);
} else {
request.getSession().setAttribute(
18fbc
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
LocaleContextHolder.getLocale());
language = LocaleContextHolder.getLocale().getLanguage();
request.setAttribute("language", language);
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}</span>
在springMVC的配置文件中配置拦截器
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<span style="font-size:14px;"><mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
<bean class="com.tianjunwei.interceptor.LanguageInterceptor"></bean>
</mvc:interceptors></span>
在工程中添加多语言配置文件,在src/main/resources目录下新建messages目录,分别添加中英文的多语言配置文件message_en_US.properties和message_zh_CN.properties,文件中以key = value的形式保存多语言信息
运行结果图:
二、基于Cookie的国际化实现
与上面类似,我们首先创建一个拦截器用来将多语言信息写到Cookie中,这样就可以通过cookie来切换多语言了。
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<span style="font-size:14px;"> public class LanguageCookieInterceptor implements HandlerInterceptor{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
String language = request.getParameter("language");
if (language != null&&language.equals("zh")) {
Locale locale = new Locale("zh", "CN");
(new CookieLocaleResolver()).setLocale (request, response, locale);
request.setAttribute("language", language);
} else if (language != null&&language.equals("en")) {
Locale locale = new Locale("en", "US");
(new CookieLocaleResolver()).setLocale (request, response, locale);
request.setAttribute("language", language);
} else {
(new CookieLocaleResolver()).setLocale (request, response,
LocaleContextHolder.getLocale());
language = LocaleContextHolder.getLocale().getLanguage();
request.setAttribute("language", language);
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}</span>
springMVC的配置文件如下:
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<span style="font-size:14px;"><mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
<!-- <bean class="com.tianjunwei.interceptor.LanguageInterceptor"></bean> -->
<bean class="com.tianjunwei.interceptor.LanguageCookieInterceptor"></bean>
</mvc:interceptors>
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver"/></span>
这样我们也可以实现通过Session实现的效果。
一、基于Session的国际化实现
基于Session的国际化实现其实说来也简单,就是在Session中保存语言信息Locale,这样springMVC会从我们提供的多语言配置文件中读取相关语言的信息。
(1)首先我们需要配置springMVC的多语言配置,因为我们打算使用Session来实现,所有对于localeResolver我们要配置其实现类SessionLocaleResolver,在springMVC的配置文件中添加如下配置:
[html] view
plain copy
print?
<span style="font-size:14px;"><bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/></span>
(2)这里我们提供了一个多语言拦截器LanguageInterceptor,通过这个拦截器设置多语言信息,其实主要的代码就是request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale),这样springMVC会根据Locale的信息来获得多语言。
[java] view
plain copy
print?
<span style="font-size:14px;"> public class LanguageInterceptor implements HandlerInterceptor{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
String language = request.getParameter("language");
if (language != null&&language.equals("zh")) {
Locale locale = new Locale("zh", "CN");
request.getSession()
.setAttribute(
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
locale);
request.setAttribute("language", language);
} else if (language != null&&language.equals("en")) {
Locale locale = new Locale("en", "US");
request.getSession()
.setAttribute(
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
locale);
request.setAttribute("language", language);
} else {
request.getSession().setAttribute(
18fbc
SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
LocaleContextHolder.getLocale());
language = LocaleContextHolder.getLocale().getLanguage();
request.setAttribute("language", language);
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}</span>
在springMVC的配置文件中配置拦截器
[html] view
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print?
<span style="font-size:14px;"><mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
<bean class="com.tianjunwei.interceptor.LanguageInterceptor"></bean>
</mvc:interceptors></span>
在工程中添加多语言配置文件,在src/main/resources目录下新建messages目录,分别添加中英文的多语言配置文件message_en_US.properties和message_zh_CN.properties,文件中以key = value的形式保存多语言信息
运行结果图:
二、基于Cookie的国际化实现
与上面类似,我们首先创建一个拦截器用来将多语言信息写到Cookie中,这样就可以通过cookie来切换多语言了。
[java] view
plain copy
print?
<span style="font-size:14px;"> public class LanguageCookieInterceptor implements HandlerInterceptor{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
String language = request.getParameter("language");
if (language != null&&language.equals("zh")) {
Locale locale = new Locale("zh", "CN");
(new CookieLocaleResolver()).setLocale (request, response, locale);
request.setAttribute("language", language);
} else if (language != null&&language.equals("en")) {
Locale locale = new Locale("en", "US");
(new CookieLocaleResolver()).setLocale (request, response, locale);
request.setAttribute("language", language);
} else {
(new CookieLocaleResolver()).setLocale (request, response,
LocaleContextHolder.getLocale());
language = LocaleContextHolder.getLocale().getLanguage();
request.setAttribute("language", language);
}
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}</span>
springMVC的配置文件如下:
[html] view
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print?
<span style="font-size:14px;"><mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
<!-- <bean class="com.tianjunwei.interceptor.LanguageInterceptor"></bean> -->
<bean class="com.tianjunwei.interceptor.LanguageCookieInterceptor"></bean>
</mvc:interceptors>
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver"/></span>
这样我们也可以实现通过Session实现的效果。
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