package com.whyc.config;
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import com.whyc.constant.YamlProperties;
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import com.whyc.util.ActionUtil;
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import com.whyc.util.CommonUtil;
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import org.apache.commons.lang3.StringUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.lang.NonNull;
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import org.springframework.web.servlet.LocaleResolver;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.util.Locale;
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/**
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* i18n自定义LocaleResolver
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*/
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@Configuration
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public class I18nLocaleResolver implements LocaleResolver {
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@Autowired
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private HttpServletRequest request;
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public Locale getLocal() {
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return resolveLocale(request);
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}
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/**
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* 从HttpServletRequest中获取Locale
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* 优先级:
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* 配置文件指定>从request指定lang>从session中获取lang>本机语言环境获取Locale
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*
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* @param httpServletRequest httpServletRequest
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* @return 语言Local
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*/
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@Override
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public Locale resolveLocale(HttpServletRequest httpServletRequest) {
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//如果没有就使用默认的（根据主机的语言环境生成一个 Locale
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Locale locale = Locale.getDefault();
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//配置文件指定
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String i18nLanguage = YamlProperties.i18nLanguage;
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if(StringUtils.isNotBlank(i18nLanguage)){
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if(i18nLanguage.startsWith("zh")){
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locale = Locale.CHINESE;
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}else{
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locale = Locale.US;
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}
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}
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else if(httpServletRequest!=null) {
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//获取请求中的语言参数
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String language = httpServletRequest.getParameter("lang");
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//从session中获取lang
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String language2 = (String) ActionUtil.getSession().getAttribute("lang");
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//如果请求的链接中携带了 国际化的参数
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if (!StringUtils.isEmpty(language)) {
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//zh_CN
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String[] s = language.split("_");
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//国家，地区
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locale = new Locale(s[0], s[1]);
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} else if (!StringUtils.isEmpty(language2)) {
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if ((language2.startsWith("zh"))) {
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locale = Locale.SIMPLIFIED_CHINESE;
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} else { //不是中文,则采用en_US
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locale = Locale.US;
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}
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}
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}
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return locale;
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}
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/**
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* 用于实现Locale的切换。比如SessionLocaleResolver获取Locale的方式是从session中读取，但如果
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* 用户想要切换其展示的样式(由英文切换为中文)，那么这里的setLocale()方法就提供了这样一种可能
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*
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* @param request HttpServletRequest
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* @param httpServletResponse HttpServletResponse
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* @param locale locale
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*/
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@Override
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public void setLocale(@NonNull HttpServletRequest request, HttpServletResponse httpServletResponse, Locale locale) {
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}
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}
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