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Java SpringMVC实现国际化整合案例分析(i18n)

2016-05-17 00:00 573 查看
所谓国际化就是支持多种语言,web应用在不同的浏览环境中可以显示出不同的语言,比如说汉语、英语等。下面我将以具体的实例来举例说明:
(1)新建动态Java web项目,并导入几个SpringMVC必需的几个jar包,项目结构图和所需jar包如下:



(2)配置web.xml:

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<

web-app

xmlns

=

"http://xmlns.jcp.org/xml/ns/javaee"



xmlns:xsi

=

"http://www.w3.org/2001/XMLSchema-instance"



xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee



http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"



version

=

"3.1"

>



<

servlet

>


  

<

servlet-name

>springmvc</

servlet-name

>


  

<

servlet-class

>org.springframework.web.servlet.DispatcherServlet</

servlet-class

>


  

<

load-on-startup

>1</

load-on-startup

>



</

servlet

>



<

servlet-mapping

>


  

<

servlet-name

>springmvc</

servlet-name

>


  

<

url-pattern

>*.html</

url-pattern

>



</

servlet-mapping

>





<

filter

>


  

<

filter-name

>characterEncodingFilter</

filter-name

>


  

<

filter-class

>org.springframework.web.filter.CharacterEncodingFilter</

filter-class

>


  

<

init-param

>


   

<

param-name

>encoding</

param-name

>


   

<

param-value

>UTF-8</

param-value

>


  

</

init-param

>



</

filter

>



<

filter-mapping

>


  

<

filter-name

>characterEncodingFilter</

filter-name

>


  

<

url-pattern

>/*</

url-pattern

>



</

filter-mapping

>


</

web-app

>


常规配置,没有什么特殊的地方,不多解释
(3)SpringMVC的配置文件springmvc-servlet.xml:

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<?

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:context

=

"http://www.springframework.org/schema/context"



xmlns:mvc

=

"http://www.springframework.org/schema/mvc"



xsi:schemaLocation="http://www.springframework.org/schema/beans


 

http://www.springframework.org/schema/beans/spring-beans-4.0.xsd


 

http://www.springframework.org/schema/context


 

http://www.springframework.org/schema/context/spring-context-4.0.xsd


 

http://www.springframework.org/schema/mvc


 

http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">



<

context:component-scan

base-package

=

"cn.zifangsky.* *.controller"

/>



<

context:annotation-config

/>

<!-- 激活Bean中定义的注解 -->



<

mvc:annotation-driven

/>



<!-- 视图相关配置 -->



<

bean


  

class

=

"org.springframework.web.servlet.view.InternalResourceViewResolver"

>


  

<

property

name

=

"prefix"

value

=

"/WEB-INF/pages/"

/>

<!-- 视图前缀 -->


  

<

property

name

=

"suffix"

value

=

".jsp"

/>

<!-- 视图后缀 -->



</

bean

>



<!-- 存储区域设置信息 -->



<

bean

id

=

"localeResolver"


  

class

=

"org.springframework.web.servlet.i18n.SessionLocaleResolver"

/>



<!-- 国际化资源文件 -->



<

bean

id

=

"messageSource"


  

class

=

"org.springframework.context.support.ReloadableResourceBundleMessageSource"

>


  

<

property

name

=

"basename"

value

=

"classpath:messages"

/>



</

bean

>



<

mvc:interceptors

>


  

<

bean

id

=

"localeChangeInterceptor"


   

class

=

"org.springframework.web.servlet.i18n.LocaleChangeInterceptor"

>


   

<

property

name

=

"paramName"

value

=

"lang"

/>


  

</

bean

>



</

mvc:interceptors

>


</

beans

>


在上面的配置中,SessionLocaleResolver类通过一个预定义会话名将区域化信息存储在会话中。紧接着的“messageSource”配置的是国际化资源文件的路径,”classpath:messages”指的是classpath路径下的messages_zh_CN.properties文件和messages_en_US.properties文件。在这个配置文件的最后配置的是一个拦截器,该拦截器通过名为”lang”的参数来拦截HTTP请求,使其重新设置页面的区域化信息
(4)两个国际化资源文件:
i)messages_zh_CN.properties文件:

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language.cn = \u4e2d\u6587


language.en = \u82f1\u6587


internationalisation = \u56fd\u9645\u5316


welcome = \u6b22\u8fce\u8bbf\u95ee\u201c\u007a\u0069\u0066\u0061\u006e\u0067\u0073\u006b\u0079\u7684\u4e2a\u4eba\u535a\u5ba2\u201d\uff0c\u0055\u0052\u004c\uff1a\u0068\u0074\u0074\u0070\u003a\u002f\u002f\u0077\u0077\u0077\u002e\u007a\u0069\u0066\u0061\u006e\u0067\u0073\u006b\u0079\u002e\u0063\u006e


ii)messages_en_US.properties文件:

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language.cn = Chinese


language.en = English


internationalisation = \u0020Internationalisation


welcome = Welcome to visit "zifangsky's personal blog",URL\uff1ahttp://www.zifangsky.cn


注:上面一些看起来“乱码”的地方实际上是经过Unicode编码的
(5)后台处理请求的controller:

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package

cn.zifangsky.controller;


import

org.springframework.stereotype.Controller;


import

org.springframework.web.bind.annotation.RequestMapping;


import

org.springframework.web.servlet.ModelAndView;


@Controller


public

class

I18nController {



@RequestMapping

(value =

"/hello"

)



public

ModelAndView welcome() {


  

ModelAndView modelAndView =

new

ModelAndView(

"welcome"

);


  

return

modelAndView;



}


}


这个controller很简单,就是转到一个视图页面welcome.jsp
(6)首页的index.jsp:

1
<% response.sendRedirect("hello.html"); %>


意思很简单,就是项目启动之后就请求htllo.html,也就是让controller中的welcome方法处理这个请求
(7)welcome.jsp:

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<%@ page language="java" contentType="text/html; charset=UTF-8"



pageEncoding="UTF-8"%>


<%@taglib prefix="mvc" uri="http://www.springframework.org/tags/form" %>


<%@taglib prefix="spring" uri="http://www.springframework.org/tags" %>


<

html

>


<

head

>


<

title

>SpringMVC<

spring:message

code

=

"internationalisation"

/></

title

>


</

head

>


<

body

>



Language: <

a

href

=

"?lang=zh_CN"

><

spring:message

code

=

"language.cn"

/></

a

> - <

a

href

=

"?lang=en_US"

><

spring:message

code

=

"language.en"

/></

a

>



<

h2

>


  

<

spring:message

code

=

"welcome"

/>



</

h2

>



Locale: ${pageContext.response.locale }


</

body

>


</

html

>


可以看出,在需要使用国际化处理的地方都使用了Spring的message标签,code属性对应资源文件中的“键”名称
(8)最后的显示效果如下:
i)中文:



ii)英文:

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