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SpringMVC(8)国际化

SpringMVC(七)格式化显示中我们讲了数据的格式化显示,Spring在做格式化展示的时候已经做了国际化处理,那么如何将我们网站的其它内容(如菜单、标题等)做国际化处理呢?这就是本篇要将的内容—>国际化。

一.基于浏览器请求的国际化实现:

首先配置我们项目的springservlet-config.xml文件添加的内容如下:

<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <!-- 国际化信息所在的文件名 -->                     
    <property name="basename" value="messages" />   
    <!-- 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>

在com.demo.web.controllers包中添加GlobalController.java内容如下:

package com.demo.web.controllers;

import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.support.RequestContext;
import com.demo.web.models.FormatModel;

@Controller
@RequestMapping(value = "/global")
public class GlobalController {
    
    @RequestMapping(value="/test", method = {RequestMethod.GET})
    public String test(HttpServletRequest request,Model model){
        if(!model.containsAttribute("contentModel")){
            
            //从后台代码获取国际化信息
            RequestContext requestContext = new RequestContext(request);
            model.addAttribute("money", requestContext.getMessage("money"));
            model.addAttribute("date", requestContext.getMessage("date"));

            
            FormatModel formatModel=new FormatModel();

            formatModel.setMoney(12345.678);
            formatModel.setDate(new Date());
            
            model.addAttribute("contentModel", formatModel);
        }
        return "globaltest";
    }
    
}

这里展示模型还用系列(7)中的作为演示。

在项目中的源文件夹resources中添加messages.properties、messages_zh_CN.properties、messages_en_US.properties三个文件,其中messages.properties、messages_zh_CN.properties里面的"money", "date",为中文,messages_en_US.properties里面的为英文。

在views文件夹中添加globaltest.jsp视图,内容如下:

<%@ 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">

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

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

    下面展示的是后台获取的国际化信息:<br/>
    ${money}<br/>
    ${date}<br/>

    下面展示的是视图中直接绑定的国际化信息:<br/>
    <spring:message code="money"/>:<br/>
    <spring:eval expression="contentModel.money"></spring:eval><br/>
    <spring:message code="date"/>:<br/>
    <spring:eval expression="contentModel.date"></spring:eval><br/>
    
</body>
</html>

运行测试:

1

更改浏览器语言顺序,刷新页面:

2

 

二.基于Session的国际化实现:

在项目的springservlet-config.xml文件添加的内容如下(第一种时添加的内容要保留):

<mvc:interceptors>  
    <!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 --> 
    <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />  
</mvc:interceptors>  

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

更改globaltest.jsp视图为如下内容:

<%@ 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">

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

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <a href="test?langType=zh">中文</a> | <a href="test?langType=en">英文</a><br/>

    下面展示的是后台获取的国际化信息:<br/>
    ${money}<br/>
    ${date}<br/>

    下面展示的是视图中直接绑定的国际化信息:<br/>
    <spring:message code="money"/>:<br/>
    <spring:eval expression="contentModel.money"></spring:eval><br/>
    <spring:message code="date"/>:<br/>
    <spring:eval expression="contentModel.date"></spring:eval><br/>
    
</body>
</html>

更改GlobalController.java为如下内容:

package com.demo.web.controllers;

import java.util.Date;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;
import org.springframework.web.servlet.support.RequestContext;
import com.demo.web.models.FormatModel;

@Controller
@RequestMapping(value = "/global")
public class GlobalController {
    
    @RequestMapping(value="/test", method = {RequestMethod.GET})
    public String test(HttpServletRequest request,Model model, @RequestParam(value=http://www.mamicode.com/"langType", defaultValue="zh") String langType){
        if(!model.containsAttribute("contentModel")){
            
            if(langType.equals("zh")){
                Locale locale = new Locale("zh", "CN"); 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale); 
            }
            else if(langType.equals("en")){
                Locale locale = new Locale("en", "US"); 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale);
            }
            else 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,LocaleContextHolder.getLocale());
            
            //从后台代码获取国际化信息
            RequestContext requestContext = new RequestContext(request);
            model.addAttribute("money", requestContext.getMessage("money"));
            model.addAttribute("date", requestContext.getMessage("date"));

            
            FormatModel formatModel=new FormatModel();

            formatModel.setMoney(12345.678);
            formatModel.setDate(new Date());
            
            model.addAttribute("contentModel", formatModel);
        }
        return "globaltest";
    }
    
}

运行测试:

3

4

 

三.基于Cookie的国际化实现:

把实现第二种方法时在项目的springservlet-config.xml文件中添加的

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

注释掉,并添加以下内容:

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

更改GlobalController.java为如下内容:

package com.demo.web.controllers;

import java.util.Date;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.i18n.CookieLocaleResolver;
//import org.springframework.web.servlet.i18n.SessionLocaleResolver;
import org.springframework.web.servlet.support.RequestContext;

import com.demo.web.models.FormatModel;

@Controller
@RequestMapping(value = "/global")
public class GlobalController {
    
    @RequestMapping(value="/test", method = {RequestMethod.GET})
    public String test(HttpServletRequest request, HttpServletResponse response, Model model, @RequestParam(value=http://www.mamicode.com/"langType", defaultValue="zh") String langType){
        if(!model.containsAttribute("contentModel")){
            
            /*if(langType.equals("zh")){
                Locale locale = new Locale("zh", "CN"); 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale); 
            }
            else if(langType.equals("en")){
                Locale locale = new Locale("en", "US"); 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale);
            }
            else 
                request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,LocaleContextHolder.getLocale());*/
            
            if(langType.equals("zh")){
                Locale locale = new Locale("zh", "CN"); 
                //request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale);
                (new CookieLocaleResolver()).setLocale (request, response, locale);
            }
            else if(langType.equals("en")){
                Locale locale = new Locale("en", "US"); 
                //request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale);
                (new CookieLocaleResolver()).setLocale (request, response, locale);
            }
            else 
                //request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,LocaleContextHolder.getLocale());
                (new CookieLocaleResolver()).setLocale (request, response, LocaleContextHolder.getLocale());
            
            //从后台代码获取国际化信息
            RequestContext requestContext = new RequestContext(request);
            model.addAttribute("money", requestContext.getMessage("money"));
            model.addAttribute("date", requestContext.getMessage("date"));

            
            FormatModel formatModel=new FormatModel();

            formatModel.setMoney(12345.678);
            formatModel.setDate(new Date());
            
            model.addAttribute("contentModel", formatModel);
        }
        return "globaltest";
    }
    
}

运行测试:

5

6

关于<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" />3个属性的说明(可以都不设置而用其默认值):

<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
    <!-- 设置cookieName名称,可以根据名称通过js来修改设置,也可以像上面演示的那样修改设置,默认的名称为 类名+LOCALE(即:org.springframework.web.servlet.i18n.CookieLocaleResolver.LOCALE-->
    <property name="cookieName" value="lang"/>
    <!-- 设置最大有效时间,如果是-1,则不存储,浏览器关闭后即失效,默认为Integer.MAX_INT-->
    <property name="cookieMaxAge" value="100000">
    <!-- 设置cookie可见的地址,默认是“/”即对网站所有地址都是可见的,如果设为其它地址,则只有该地址或其后的地址才可见-->
    <property name="cookiePath" value="/">
</bean>

 

四.基于URL请求的国际化的实现:

首先添加一个类,内容如下:

import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.LocaleResolver;

public class MyAcceptHeaderLocaleResolver extends AcceptHeaderLocaleResolver {

    private Locale myLocal;

    public Locale resolveLocale(HttpServletRequest request) {
        return myLocal;
    } 

    public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
        myLocal = locale;
    }
  
}

然后把实现第二种方法时在项目的springservlet-config.xml文件中添加的

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

注释掉,并添加以下内容:

<bean id="localeResolver" class="xx.xxx.xxx.MyAcceptHeaderLocaleResolver"/>

“xx.xxx.xxx”是刚才添加的MyAcceptHeaderLocaleResolver 类所在的包名。

保存之后就可以在请求的URL后附上 locale=zh_CN 或 locale=en_US 如 http://xxxxxxxx?locale=zh_CN 来改变语言了,具体这里不再做演示了。

SpringMVC(8)国际化