SpringMVC基础-11-国际化

 代码示例：

I18TestController.java:

package com.atguigu.controller;

import java.util.Locale;

import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;

@Controller
public class I18TestController {

    @Autowired
    private MessageSource messageSource;

    @RequestMapping("/tologinpage")
    public String tologinPage(@RequestParam(value="locale",defaultValue="zh_CN")String localeStr, Locale locale, Model model,HttpSession session) {
        System.out.println(locale);
        String welcomeinfo = messageSource.getMessage("welcomeinfo", null,
                locale);
        System.out.println(welcomeinfo);
        model.addAttribute("msg", "哈哈哈");

//        // zh_CN
//        Locale l = null;
//        // 如果带了locale参数就用参数指定的区域信息，如果没带就用请求头的
//        if (localeStr != null && !"".equals(localeStr)) {
//            l = new Locale(localeStr.split("_")[0], localeStr.split("_")[1]);
//        } else {
//            l = locale;
//        }
//        session.setAttribute(SessionLocaleResolver.class.getName() + ".LOCALE", l);
        return "login";
    }

}

MyLocaleResolver.java:

package com.atguigu.controller;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.LocaleResolver;

public class MyLocaleResolver implements LocaleResolver {

    /**
     * 解析返回locale
     */
    @Override
    public Locale resolveLocale(HttpServletRequest req) {
        // TODO Auto-generated method stub
        // zh_CN
        Locale l = null;
        String localeStr = req.getParameter("locale");
        //如果带了locale参数就用参数指定的区域信息，如果没带就用请求头的
        if (localeStr != null && !"".equals(localeStr)) {
            l = new Locale(localeStr.split("_")[0], localeStr.split("_")[1]);
        } else {
            l = req.getLocale();
        }
        return l;
    }

    /**
     * 修改locale
     */
    @Override
    public void setLocale(HttpServletRequest arg0, HttpServletResponse arg1,
            Locale arg2) {
        throw new UnsupportedOperationException(
                "Cannot change HTTP accept header - use a different locale resolution strategy");
    }

}

login_en_US.properties:

welcomeinfo=welcome to atguigu.com
username=USERNAME
password=PASSWORD
loginBtn=LOGIN

login_zh_CN.properties:

welcomeinfo=u6B22u8FCEu6765u5230u5C1Au7845u8C37
username=u7528u6237u540D
password=u5BC6u7801
loginBtn=u767Bu9646

springmvc.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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <context:component-scan base-package="com.atguigu"></context:component-scan>
    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <mvc:default-servlet-handler/>
    <mvc:annotation-driven></mvc:annotation-driven>
    
    <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="loginpage/login"></property>
    </bean>
    
    <!--自定义区域信息解析器  -->
    <!-- <bean id="localeResolver" class="com.atguigu.controller.MyLocaleResolver"></bean> -->
    
    <!-- 区域信息从session中拿 -->
    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"></bean>
    <mvc:interceptors>
        <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"></bean>
    </mvc:interceptors>
</beans>

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>Insert title here</title>
<%
    pageContext.setAttribute("ctp", request.getContextPath());
%>
</head>
<body>
<a href="${ctp }/test01">test01</a><br/>
<a href="tologinpage">去登陆页面</a>
</body>
</html>

login.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!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>Insert title here</title>
</head>
<body>
<h1>
<!-- 国际化的区域信息是决定国际化显示的因素 -->
    <fmt:message key="welcomeinfo"/>
</h1>
<form action="">
    <fmt:message key="username"/>:<input /><br/>
    <fmt:message key="password"/>:<input /><br/>
    <input type="submit" value="<fmt:message key="loginBtn"/>"/>
</form>
<!-- 如果点击超链接切换国际化 -->
<a href="tologinpage?locale=zh_CN">中文</a>|<a href="tologinpage?locale=en_US">English</a>
</body>
</html>