SpringI18N - 设置和获取Locale

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LocaleResolver

--抽象Locale获取策略的接口

LocaleChangeInterceptor

--通过参数改变Locale值

例子：SessionLocaleResolver和LocaleChangeInterceptor的结合使用

ApplicationContext-i18n.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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><context:component-scan base-package="com.siyuan.study.springi18n" /><mvc:interceptors><bean id="localeChangeInterceptor"class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" /></mvc:interceptors><bean id="localeResolver"class="org.springframework.web.servlet.i18n.SessionLocaleResolver" /><bean id="jspViewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass"value="org.springframework.web.servlet.view.JstlView" /><property name="prefix" value="/WEB-INF/view/" /><property name="suffix" value=".jsp" /></bean></beans>

LocaleController.java

package com.siyuan.study.springi18n;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
@RequestMapping("/locale")
public class LocaleController {@RequestMapping("")public String showLocale() {return "locale";}}

locale.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head><%=response.getLocale() %>
<body>
</body>
</html>

启动后测试：

http://localhost:9000/springi18n/locale

zh_CN

http://localhost:9000/springi18n/locale?locale=en_US

en_US

http://localhost:9000/springi18n/locale

en_US

为什么可以通过response获取Locale

DispatcherServlet.java

protected void render(ModelAndView mv, HttpServletRequest request, HttpServletResponse response) throws Exception {// Determine locale for request and apply it to the response.Locale locale = this.localeResolver.resolveLocale(request);response.setLocale(locale);
......
}

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