实战：第二十二章：i18n国际化（已实现中文，英文，波兰文）

墨蓝 2022-09-04 08:51 23阅读 0赞

## 创建一个maven模块 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70]

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>common</artifactId>
            <groupId>com.liao</groupId>
            <version>1.0.0</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>common-i18n</artifactId>
    
        <properties>
            <poi.version>3.9</poi.version>
            <spring.version>5.0.11.RELEASE</spring.version>
            <javax.servlet.version>4.0.1</javax.servlet.version>
            <spring.data.version>2.0.9.RELEASE</spring.data.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${
        spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-commons</artifactId>
                <version>${
        spring.data.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${
        spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${
        spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${
        spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-configuration-processor</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>${
        javax.servlet.version}</version>
            </dependency>
        </dependencies>
    
    </project>

创建配置文件：LocaleConfiguration

import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
    
    /**
     * 语言区域配置
     * @author zhiwei Liao
     */
    @Configuration
    public class LocaleConfiguration {
        
    
        private final String LOCAL_HEAD_NAME = "Locale";
    
        @Bean
        public WebMvcConfigurer localeInterceptor() {
        
            return new WebMvcConfigurer() {
        
                @Override
                public void addInterceptors(InterceptorRegistry registry) {
        
                    LocaleChangeInterceptor localeInterceptor = new LocaleChangeInterceptor();
                    localeInterceptor.setParamName(LOCAL_HEAD_NAME);
                    registry.addInterceptor(localeInterceptor);
                }
            };
        }
    }

创建常量：LanguageConstant

/**
     * @author zhiwei Liao
     * @version 1.0
     * @Description 语言
     * @Date 2021/7/19 18:31
     */
    
    public class LanguageConstant {
        
    
        //波兰文
        public static final String PL = "pl_pl";
    
        //英文
        public static final String US = "en_us";
    
        //中文
        public static final String CN = "zh_cn";
    
        //请求头中设置语言
        public static final String ACCEPT_LANGUAGE = "accept-language";
    
    }

创建工具类：LocaleUtils

import com.liao.common.i18n.constant.LanguageConstant;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.context.MessageSource;
    import org.springframework.context.i18n.LocaleContextHolder;
    import org.springframework.stereotype.Component;
    import org.springframework.web.context.request.RequestAttributes;
    import org.springframework.web.context.request.RequestContextHolder;
    import org.springframework.web.context.request.ServletRequestAttributes;
    import javax.security.auth.login.LoginContext;
    import javax.servlet.http.HttpServletRequest;
    import java.util.Enumeration;
    import java.util.Locale;
    
    /**
     * 国际化转换工具
     * @author zhiwei Liao
     */
    @Component
    public class LocaleUtils {
        
    
        private static final Logger log = LoggerFactory.getLogger(LocaleUtils.class);
    
        private static MessageSource messageSource;
    
        public LocaleUtils(MessageSource messageSource) {
        
            LocaleUtils.messageSource = messageSource;
        }
    
        public static String getMessage(String msgKey) {
        
            return getMessage(msgKey, null);
        }
    
        public static String getMessage(String msgKey,Object[] args) {
        
            try {
        
                return messageSource.getMessage(msgKey, args, LocaleContextHolder.getLocale());
            } catch (Exception e) {
        
                return msgKey;
            }
        }
    
        /**
         * @Description 获取当前语言
         * @MethodParameterTypes []
         * @MethodParameters []
         * @MethodReturnType java.util.Locale
         * @Author zhiwei Liao
         * @Date 2021/7/19 18:43
         **/
        public static Locale getCurrentLocale() {
        
            String language = null;
            RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
            HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();
            Enumeration<String> headerNames = request.getHeaderNames();
            if (headerNames != null) {
        
                while (headerNames.hasMoreElements()) {
        
                    String name = headerNames.nextElement();
                    if(LanguageConstant.ACCEPT_LANGUAGE.equals(name)){
        
                        Enumeration<String> values = request.getHeaders(name);
                        while (values.hasMoreElements()) {
        
                            String value = values.nextElement();
                            if(LanguageConstant.PL.equals(value)){
        
                                language = value;
                            }else if(LanguageConstant.US.equals(value)){
        
                                language = value;
                            }else if(LanguageConstant.CN.equals(value)){
        
                                language = value;
                            }
                        }
                    }
                }
            }
            log.info("======getCurrentLocale.language:" + language);
            Locale locale = null;
            if(LanguageConstant.PL.equals(language)){
        
                //波兰文
                locale = new Locale("pl","PL");
    //                locale = new Locale("pl_PL");//本地有效，服务器上无效
            }else if(LanguageConstant.US.equals(language)){
        
                //英文
                locale = Locale.US;
            }else if(LanguageConstant.CN.equals(language)){
        
                //简体中文
                locale = Locale.SIMPLIFIED_CHINESE;
            }else {
        
                //请求头中没有语言设置时，默认给英文
                locale = Locale.US;
            }
            log.info("=========locale:" + locale);
            return locale;
        }
    
    }

## 其他模块使用国际化 ##

引用国际化模块的依赖，创建多语言文件  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 1]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 2]错误提示国际化返回：

log.error(UserinfoConstant.LOGIN_FAILED);
    String message = messageSource.getMessage("user.login.failed", null, LocaleUtils.getCurrentLocale());
    return ResultData.error(UserCodeConstant.LOGIN_FAILED, message);

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 3]测试是否可用：  
波兰文：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 4]英文：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 5]中文：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 6]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70]: /images/20220829/09a8314ce61c4b119fc42ef13ab64543.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/062345f972c9408eb087f3e11770069c.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 2]: /images/20220829/9484224b41b64419af21a55f2d67f7b3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 3]: /images/20220829/ba4237adcda1454395f75107f2beebe3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 4]: /images/20220829/95fa521d72d94182a926d41e7ea65252.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 5]: /images/20220829/c429e124c67c4c309369ad4d489ff372.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phdmFfd3hpZA_size_16_color_FFFFFF_t_70 6]: /images/20220829/1f7e1c88f9ac49cdb9376e4f0c63ee93.png