SpringBoot创建员工管理系统（二）国际化操作

public class MessageSourceAutoConfiguration {
    private static final Resource[] NO_RESOURCES = new Resource[0];

    public MessageSourceAutoConfiguration() {
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.messages") //我们的配置文件可以直接放在类路径下叫： messages.properties， 就可以进行国际化操作了
    public MessageSourceProperties messageSourceProperties() {
        return new MessageSourceProperties();
    }

    @Bean
    public MessageSource messageSource(MessageSourceProperties properties) {
        ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
        if (StringUtils.hasText(properties.getBasename())) {
　　　　　　　　//设置国际化文件的基础名（去掉语言国家代码的）
            messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename())));
        }

        if (properties.getEncoding() != null) {
            messageSource.setDefaultEncoding(properties.getEncoding().name());
        }

        messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale());
        Duration cacheDuration = properties.getCacheDuration();
        if (cacheDuration != null) {
            messageSource.setCacheMillis(cacheDuration.toMillis());
        }

        messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat());
        messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage());
        return messageSource;
    }
}

#国际化配置文件位置
spring.messages.basename=i18n.login

@Bean
        @ConditionalOnMissingBean
        @ConditionalOnProperty(
            prefix = "spring.mvc",
            name = {"locale"}
        )
        public LocaleResolver localeResolver() {
            //容器中没有就自己配，有的话就用用户配置的
            if (this.mvcProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) {
                return new FixedLocaleResolver(this.mvcProperties.getLocale());
            } else {
                AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
                localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
                return localeResolver;
            }
        }

public Locale resolveLocale(HttpServletRequest request) {
        Locale defaultLocale = this.getDefaultLocale();
        //默认的就是根据请求头带来的区域信息获取Locale进行国际化
        if (defaultLocale != null && request.getHeader("Accept-Language") == null) {
            return defaultLocale;
        } else {
            Locale requestLocale = request.getLocale();
            List<Locale> 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;
            }
        }
    }

//这里传入参数不需要使用 ？  使用 （key=value）
<a class="btn btn-sm" th:href="@{/index.html(l='zh_CN')}">中文</a>
<a class="btn btn-sm" th:href="@{/index.html(l='en_US')}">English</a>

package com.zhang.springboot2.component;

import org.springframework.web.servlet.LocaleResolver;
import org.thymeleaf.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;

//处理国际化问题，编写LocalResolver
public class MyLocalResolver implements LocaleResolver {
    @Override
    public Locale resolveLocale(HttpServletRequest Request) {
//获取请求的参数
        String language = Request.getParameter("l");
        Locale locale = Locale.getDefault();//获得默认信息
//判断。如果请求的链接参数不为空
        if (!StringUtils.isEmpty(language)) {
            //拿到请求的参数，分隔请求的参数【en，us】
            String[] split = language.split("_");
            locale = new Locale(split[0], split[1]);
        }
        return locale;
    }

    //不用写，设置国际化的
    @Override
    public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {

    }
}

@Bean
    public LocaleResolver localeResolver() {
        return new MyLocalResolver();
    }