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这篇文章主要讲解了Springmvc如何实现国际化自动配置,内容清晰明了,对此有兴趣的小伙伴可以学习一下,相信大家阅读完之后会有帮助。
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在 springmvc 中通过 LocalResover 获取区域信息对象 Local(对语言信息、国家代码等的封装),进行国际化配置,在 springboot 为我们提供了默认的区域信息解析器
@Configuration( proxyBeanMethods = false ) @ConditionalOnWebApplication( type = Type.SERVLET ) @ConditionalOnClass({Servlet.class, DispatcherServlet.class, WebMvcConfigurer.class}) @ConditionalOnMissingBean({WebMvcConfigurationSupport.class}) @AutoConfigureOrder(-2147483638) @AutoConfigureAfter({DispatcherServletAutoConfiguration.class, TaskExecutionAutoConfiguration.class, ValidationAutoConfiguration.class}) public class WebMvcAutoConfiguration { public static final String DEFAULT_PREFIX = ""; public static final String DEFAULT_SUFFIX = ""; private static final String[] SERVLET_LOCATIONS = new String[]{"/"}; @Bean @ConditionalOnMissingBean //容器中没有 LocaleResolver 时 @ConditionalOnProperty( prefix = "spring.mvc", name = {"locale"} ) public LocaleResolver localeResolver() { //如果属性中指定用固定的就用固定的 FixedLocaleResolver 区域化信息解析器 if (this.mvcProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) { return new FixedLocaleResolver(this.mvcProperties.getLocale()); } else { //否则使用 AcceptHeaderLocaleResolver 区域化信息解析器 AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver(); localeResolver.setDefaultLocale(this.mvcProperties.getLocale()); return localeResolver; } }
AcceptHeaderLocaleResolver 在 request 请求头中获取到区域信息
public class AcceptHeaderLocaleResolver implements LocaleResolver { private final ListsupportedLocales = new ArrayList(4); public Locale resolveLocale(HttpServletRequest request) { Locale defaultLocale = this.getDefaultLocale(); if (defaultLocale != null && request.getHeader("Accept-Language") == null) { return defaultLocale; } else { Locale requestLocale = request.getLocale(); List supportedLocales = this.getSupportedLocales(); if (!supportedLocales.isEmpty() && !supportedLocales.contains(requestLocale)) { Locale supportedLocale = this.findSupportedLocale(request, supportedLocales); if (supportedLocale != null) { return supportedLocale; } else { return defaultLocale != null ? defaultLocale : requestLocale; } } else { return requestLocale; } } }
默认就是更具请求头带来的区域信息获取 Local 进行国际化
我们可以通过定义自己的区域化解析器生成区域化信息
public class MyLocaleResolver implements LocaleResolver { @Override public Locale resolveLocale(HttpServletRequest request) { String l = request.getParameter("l"); Locale locale = Locale.getDefault(); if(!StringUtils.isEmpty(l)){ String[] split = l.split("_"); locale = new Locale(split[0],split[1]); } return locale; } @Override public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) { } } @Configuration public class MyMvcConfig extends WebMvcConfigurerAdapter { @Bean public LocaleResolver localeResolver(){ return new MyLocaleResolver(); } }
量变引起质变,这就是我所理解的因果。
看完上述内容,是不是对Springmvc如何实现国际化自动配置有进一步的了解,如果还想学习更多内容,欢迎关注创新互联行业资讯频道。