学渣尝鲜—SpringMVC实现国际化

前言

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

SpringMVC实现国际化简单案例

第一步：准备jar包

第二步：编写配置文档applicationContext.xml

<?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="controller" />

    <!-- 激活Bean中定义的注解 -->
    <context:annotation-config />
    <mvc:annotation-driven />

    <!-- 视图相关配置 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />  <!-- 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>

    <!-- 作为url的拦截作用，当url出现lang  就将其进行拦截处理 -->
    <mvc:interceptors>
        <bean id="localeChangeInterceptor"
            class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
            <property name="paramName" value="lang" />
        </bean>
    </mvc:interceptors>
</beans>

第三步：编写web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
 <servlet>
     <servlet-name>springMVC</servlet-name>
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <!-- 加载Spring配置文件 -->
     <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
     </init-param>
     <!-- 标记容器是否在启动的时候就加载这个servlet -->
     <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
     <servlet-name>springMVC</servlet-name>
     <url-pattern>*.action</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>

第四步：这里只实现中文和英文，所以只编写了中英文的属性文件

messages_en_US.properties

language.cn = \u4e2d\u6587
language.en = \u82f1\u6587
internationalisation = \u56fd\u9645\u5316
welcome = \u6b22\u8fce\u8bbf\u95ee\u201c\u0048\u0044\u0051\u7684\u4e2a\u4eba\u535a\u5ba2\u201d\uff0c\u0055\u0052\u004c\uff1a\u0068\u0074\u0074\u0070\u003a\u002f\u002f\u0062\u006c\u006f\u0067\u002e\u0068\u0064\u0071\u0079\u0066\u002e\u0063\u006c\u0075\u0062

messages_en_US.properties

language.cn = Chinese
language.en = English
internationalisation = \u0020Internationalisation
welcome = Welcome to visit "HDQ's personal blog",URL\uff1ahttp://blog.hdqyf.club

第五步：简单编写controller

package controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class InternationalController {
    @RequestMapping(value = "/hello.action")
    public String welcome() {
        return "welcome";
    }
}

第六步：编写两个测试页面

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>跳转页面</title>
</head>
<body>
    <% response.sendRedirect("hello.action"); %>
</body>
</html>

welcome.jsp

<%@ 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>