基于session的国际化实现方式
- 原理：使用spring的session bean保存相应的国际化组件。
- 配置文件：
- spring容器配置applicationContext.xml，中添加取得信息的messageSource，放在spring容器而非springmvc容器加载是因为代码中有Service的注解依赖于他
<!-- 国际换的service依赖于他，所以从mvc提到前面 -->
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<!-- 国际化信息所在的文件名 -->
<property name="basename" value="messages/messages" />
<!-- 如果在国际化资源文件中找不到对应代码的信息，就用这个代码作为名称 -->
<property name="useCodeAsDefaultMessage" value="true" />
</bean>
- springmvc容器配置
<mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于（请求/Session/Cookie/url）则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />
</mvc:interceptors>
<!-- 基于session的国际化 -->
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.SessionLocaleResolver" />
- spring中的session bean依赖于接口实现，下面是其接口和对应的实现类
public interface I18nSessionService {
public void setRc(RequestContext rc);
public String getMessage(String key);
public String getMessage(String key,Object info);
public String getMessage(String key,Object...objects);
}
- 下面注解主要为设置作用域为session，注入messageSource组件，并提供RequestContext用于切换语言配置国际化
@Service
@Scope(value = WebApplicationContext.SCOPE_SESSION,
proxyMode = ScopedProxyMode.INTERFACES)
public class I18nSessionServiceImpl implements I18nSessionService {
@Autowired
@Qualifier("messageSource")
private MessageSource resources;
//前端设置切换语言是设置
RequestContext rc ;
public RequestContext getRc() {
return rc;
}
@Override
public void setRc(RequestContext rc) {
this.rc = rc;
}
@Override
public String getMessage(String key) {
// TODO Auto-generated method stub
if(null != getRc()){
return getRc().getMessage(key);
}
return resources.getMessage(key, null, null);
}
@Override
public String getMessage(String key, Object info) {
// TODO Auto-generated method stub
if(null != getRc()){
return getRc().getMessage(key, new Object[]{info});
}
return resources.getMessage(key, new Object[]{info}, null);
}
@Override
public String getMessage(String key, Object... objects) {
if(null != getRc()){
return getRc().getMessage(key, objects);
}
return resources.getMessage(key, objects, null);
}
}
- 切换语言的controller用于切换
@Resource
//注入I18nSessionService后在session作用域中更改local
private I18nSessionService i18nSessionService;
@RequestMapping(value = "/turnLanguage", method = { RequestMethod.POST, RequestMethod.GET })
public void TurnLanguage(HttpServletRequest request,
@RequestParam(value = "langType", defaultValue = "zh") String langType) {
if (langType.equals("zh")) {
Locale locale = new Locale("zh", "CN");
request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, locale);
} else if (langType.equals("en")) {
Locale locale = new Locale("en", "US");
request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, locale);
} else {
request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,
LocaleContextHolder.getLocale());
}
RequestContext requestContext = new RequestContext(request);
i18nSessionService.setRc(requestContext);
}
- 使用方式
@Resource
private I18nSessionService is;
@RequestMapping(value="/nation",method={RequestMethod.POST,RequestMethod.GET})
@ResponseBody
public Result test(HttpServletRequest request){//, @RequestParam(value="langType", defaultValue="zh") String langType
String msg = is.getMessage("argument.required","userDao");
return new Result(true, msg, "返回数据");
}
