spring mvc 国际化

使用CookieLocaleResolver实现国际化的步骤：
1.注册 messageSource，localeResolver 两个bean
2.调用localeResolver.setLocale()可改变 Locale
3.RequestContext.getMessage()ApplicationContext.getMessage()可以获取国际化信息
4.jsp页面引入spring标签后，也可直接获取国际化信息

spring 配置文件：

 1     <!-- 配置国际化资源文件路径 -->
 2     <bean id="messageSource"
 3         class="org.springframework.context.support.ResourceBundleMessageSource">
 4         <property name="basename" value="MessageBundle" /><!-- MessageBundle_en_US.properties,MessageBundle_zh_CN.properties -->
 5         <property name="defaultEncoding" value="UTF-8" />
 6     </bean>
 7     <!-- 注册spring mvc的cookie locale，其他还有SessionLocaleResolver等 -->
 8     <bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
 9         <property name="cookieName" value="language" />
10         <property name="cookieMaxAge" value="604800" /><!-- cookieMaxAge属性表示这个Cookie应该持续多少秒，-1表示这个Cookie在浏览器关闭之后就失效 -->
11         <property name="defaultLocale" value="zh_CN" />
12     </bean>

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Controller中配置：

 1 @Controller
 2 public class LoginController {
 3     @Autowired
 4     private LocaleResolver localeResolver;
 5     @Autowired  
 6     private ApplicationContext appCtx;
 7 
 8     @RequestMapping(value = "changeLocale")
 9     public String changeLocale(String locale,HttpServletRequest request,HttpServletResponse response) {
10         
11         //locale 格式为 language_country，例如 en_US，zh_CN
12         Locale setLocale = new Locale(locale.split("_")[0] , locale.split("_")[1]);
13         localeResolver.setLocale(request, response, setLocale);
14         
15         //设置变量 locale 为当前 Locale
16         request.setAttribute("locale", localeResolver.resolveLocale(request));
17         
18         //按当前 Locale 获取国际化信息
19         RequestContext requestContext = new RequestContext(request);        
20         System.out.println(requestContext.getMessage("username"));
21         
22         //按指定 Locale 获取国际化信息
23         System.out.println(appCtx.getMessage("username", null, Locale.CHINA));
24         System.out.println(appCtx.getMessage("username", new Object[]{}, Locale.US));
25         
26         return "locale";
27         //return "redirect:/";//跳转回原页面
28     }
29 }

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locale.jsp代码：

 1 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="http://www.springframework.org/tags" %><!-- 引入spring标签 -->
 3 <!DOCTYPE html>
 4 <html>
 5 <head>
 6 </head>
 7 <body>
 8     <s:message code='username'/>
 9     <s:message code="hello" arguments="${locale.language},${locale.country}" argumentSeparator=","/>
10     <!-- arguments是用来给资源文件添加参数的，argumentSeparator是用来分割多个参数的标记  -->
11     ${locale}:${locale.language}_${locale.country}
12 </body>
13 </html>

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MessageBundle_en_US.properties：

1 username=guodefu
2 hello=hi，locale.language is {0}，country is {1}

MessageBundle_zh_CN.properties：

1 username=郭德福
2 hello=嗨，当前locale的语言是{0}，国家是{1}

查看结果：
http://localhost:8080/guoguo-maven-web/changeLocale?locale=en_US
http://localhost:8080/guoguo-maven-web/changeLocale?locale=zh_CN