Spring MVC-08循序渐进之国际化(基于Session-SessionLocaleResolver)

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

1. AcceptHeaderLocaleResolver
2. SessionLocaleResolver
3. 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

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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

<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">

    
    <context:component-scan base-package="com.artisan.controller" />

    
    <mvc:annotation-driven />
    <mvc:resources mapping="/css/**" location="/css/" />
    <mvc:resources mapping="/*.jsp" location="/" />

    
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    bean>

    
    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        
        <property name="basename" value="/WEB-INF/resource/labels" />
        
        <property name="useCodeAsDefaultMessage" value="true" />
    bean>

      
      

    
    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/>

    
    <mvc:interceptors>
        <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
            
            <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

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" %>

<html>
<head>
<title><spring:message code="page.productform.title"/>title>
<style type="text/css">@import url(""/>");style>
head>
<body>

<div id="global">

Current Locale : ${pageContext.response.locale}
<br/>

Language : <a href="?lang=en">Englisha>|<a href="?lang=zh">Chinesea>

<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="button.reset"/>">
            <input id="submit" type="submit" tabindex="5" 
                value="button.submit"/>">
        p>
    fieldset>
form:form>
div>
body>
html>

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测试

tomcat中运行后，进行验证

选择英文

选择中文

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源码

代码已提交到github

https://github.com/yangshangwei/SpringMvcTutorialArtisan