概述
在Spring MVC中选择语言区域，可以使用语言解析器Bean，它包括几个实现，如下
- AcceptHeaderLocaleResolver
- SessionLocaleResolver
- CookieLocaleResolver
其中上篇博文 已经已经讲解了 Spring MVC-08循序渐进之国际化(AcceptHeaderLocaleResolver)
接下来我们来通过SessionLocaleResolver来实现国际化
工程结构
实体类 标注了JSR303校验
package com.artisan.domain; import java.io.Serializable; import javax.validation.constraints.Size; import org.hibernate.validator.constraints.NotBlank; public class Product implements Serializable { private static final long serialVersionUID = 78L; @NotBlank @Size(min=1, max=10) private String name; private String description; private Float price; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public Float getPrice() { return price; } public void setPrice(Float price) { this.price = price; } }
控制层
package com.artisan.controller; import javax.validation.Valid; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.validation.FieldError; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import com.artisan.domain.Product; @Controller @RequestMapping("/product") public class ProductController { private static final Log logger = LogFactory.getLog(ProductController.class); @RequestMapping(value="/product_input") public String inputProduct(Model model) { model.addAttribute("product", new Product()); return "ProductForm"; } @RequestMapping(value="/product_save") public String saveProduct(@Valid @ModelAttribute Product product, BindingResult bindingResult, Model model) { // 校验 if (bindingResult.hasErrors()) { FieldError fieldError = bindingResult.getFieldError(); logger.info("Code:" + fieldError.getCode() + " ,field:" + fieldError.getField()); return "ProductForm"; } // save product here model.addAttribute("product", product); return "ProductDetails"; } }
spring mvc配置文件
<?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:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描控制层的注解，使其成为Spring管理的Bean --> <context:component-scan base-package="com.artisan.controller" /> <!-- 静态资源文件 --> <mvc:annotation-driven /> <mvc:resources mapping="/css/**" location="/css/" /> <mvc:resources mapping="/*.jsp" location="/" /> <!-- 视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 国际化资源配置,资源文件绑定器--> <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> <!-- 多语言配置的路径--> <property name="basename" value="/WEB-INF/resource/labels" /> <!-- 如果在国际化资源文件中找不到对应代码的信息，就用这个代码作为名称 --> <property name="useCodeAsDefaultMessage" value="true" /> </bean> <!--cookie方式 --> <!-- <bean id="cookieLocaleResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" /> --> <!-- 动态切换国际化 ,国际化放在session中 --> <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/> <!-- 国际化操作拦截器 如果采用基于（请求/Session/Cookie）则必需配置 --> <mvc:interceptors> <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"> <!-- 通过这个参数来决定获取那个配置文件 同页面?lang --> <property name="paramName" value="lang" /> </bean> </mvc:interceptors> </beans>
国际化资源文件
labels_en.properties
label.productName=Product Name label.description=Description label.price=Price button.reset=Reset button.submit=Add Product form.name=Product Form page.productform.title=Add Product
labels_zh.properties
label.productName=\u4ea7\u54c1\u540d\u79f0 label.description=\u63cf\u8ff0 label.price=\u4ef7\u683c button.reset=\u91cd\u7f6e button.submit=\u63d0\u4ea4 form.name=\u4ea7\u54c1\u8868\u5355 page.productform.title=\u4EA7\u54C1\u8868\u5355
labels.properties
label.productName=Product Name label.description=Description label.price=Price button.reset=Reset button.submit=Add Product form.name=Product Form page.productform.title=(default)New Product Form
labels.properties
label.productName=Product Name label.description=Description label.price=Price button.reset=Reset button.submit=Add Product form.name=Product Form page.productform.title=(default)New Product Form
页面
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE HTML> <html> <head> <title><spring:message code="page.productform.title"/></title> <style type="text/css">@import url("<c:url value="/css/main.css"/>");</style> </head> <body> <div id="global"> Current Locale : ${pageContext.response.locale} <br/> Language : <a href="?lang=en">English</a>|<a href="?lang=zh">Chinese</a> <form:form commandName="product" action="product_save" method="post"> <fieldset> <legend><spring:message code="form.name" /></legend> <p> <label for="name"><spring:message code="label.productName" text="default text" />:</label> <form:input id="name" path="name" cssErrorClass="error"/> <form:errors path="name" cssClass="error"/> </p> <p> <label for="description"><spring:message code="label.description"/>: </label> <form:input id="description" path="description"/> </p> <p> <label for="price"><spring:message code="label.price" text="default text" />: </label> <form:input id="price" path="price" cssErrorClass="error"/> </p> <p id="buttons"> <input id="reset" type="reset" tabindex="4" value="<spring:message code="button.reset"/>"> <input id="submit" type="submit" tabindex="5" value="<spring:message code="button.submit"/>"> </p> </fieldset> </form:form> </div> </body> </html>
测试
tomcat中运行后，进行验证
选择英文
选择中文
源码
代码已提交到github
