mustache的国际化支持
一、国际化的实现
1、上一章中，我们在sprihg配置文件中配置了国际化信息文件前缀，同时定义了mustache的拦截器，这个实际上就是为了支持国际化。再将配置贴出：
<?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:cache="http://www.springframework.org/schema/cache" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> <!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 --> <context:component-scan base-package="com.zzq.test" /> <!-- mustache的视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.mustache.MustacheViewResolver"> <property name="cache" value="false" /> <property name="prefix" value="/WEB-INF/views/" /> <property name="suffix" value=".html" /> <property name="templateLoader"> <bean class="org.springframework.web.servlet.view.mustache.MustacheTemplateLoader" /> </property> </bean> <!-- 国际化信息文件 --> <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> <property name="basename" value="classpath:message" /> </bean> <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"> <property name="defaultLocale" value="zh" /> </bean> <bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"> <property name="paramName" value="locale" /> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> <property name="interceptors"> <list> <ref bean="localeChangeInterceptor" /> <ref bean="messageInterceptor" /> </list> </property> </bean> <!-- mustache模板中取i18n信息的拦截器 --> <bean id="messageInterceptor" class="org.springframework.web.servlet.i18n.MustacheMessageInterceptor"> <constructor-arg ref="messageSource" /> <constructor-arg ref="localeResolver" /> </bean> </beans>
2、测试
首先在message_zh.properties中添加select=选择，message_zh_TW.properties中添加select=選擇，然后再MyController中新增一个方法，并添加i18n.html，如下：
package com.zzq.test.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/my")
public class MyController {
@RequestMapping("/hello.mu")
public String hello(Model model){
model.addAttribute("name", "zzq");
//此处return的为模板，以WEB-INF/views为相对路径，.html为默认后缀，所以此处不加后缀。具体的后缀为mvc文件中配置
return "hello";
}
@RequestMapping("/i18n.mu")
public String i18n(){
return "i18n";
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Hello Page</title>
</head>
<body>
{{#i18n}}select{{/i18n}}
</body>
</html>
测试访问http://localhost:8080/my/i18n.mu?locale=zh 和http://localhost:8080/my/i18n.mu?locale=zh_TW分别可以看到中文简体和繁体。
二、分析
分析是由于配置了mustache的拦截器org.springframework.web.servlet.i18n.MustacheMessageInterceptor，查看拦截器可以看到，该类中指定了对于标签为i18n(可以通过配置文件修改这个值）的标签，将里面的值当作key进行了国际化处理，即{{#i18n}}select{{/i18n}}，这边的select就是key，将select当作key去国际化文件查找匹配的值然后再回填到模板。
代码下载地址:http://www.oschina.net/action/code/download?code=48746&id=70650
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