Springboot国际化_国际化工具类-优快云博客

本文链接：https://blog.youkuaiyun.com/liqingwei168/article/details/117785542

本文介绍了一种利用Java实现的国际化配置管理方法，通过分析HTTP请求头中的语言偏好来动态加载对应的资源文件，支持多种语言切换，并提供了默认语言回退机制。

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1.工具类：根据请求头中内容匹配是什么语言类型
@Component
public class MessageConfig {

    private static List<String> languages = Arrays.asList("zh-CN","en-US");
    private static HashMap<String,Properties> mapProperties = new HashMap<>();

    static {
        for(String s:languages){
            mapProperties.put(s,new Properties());
        }
        for(String s:languages){
            String messageConfigFile = String.format("MessageConfig_%s.properties",s);
            InputStream ios = MessageConfig.class.getClassLoader().getResourceAsStream(messageConfigFile);
            if(ios != null){
                try {
                    mapProperties.get(s).load(ios);
                } catch (IOException e) {
                    throw new RuntimeException("could not find Properties ==> "+ messageConfigFile);
                }finally {
                    try {
                        ios.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    public static String getMessage(String key){
        String language = "";
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        language = request.getHeader("Accept-Language");
        if(StringUtils.isEmpty(language)){
            language = "en-US";
        } else{
            if(!language.equals("en-US") && !language.equals("zh-CN")){
                language = "en-US";
            }
        }
        String strMessage = "";
        if(StringUtils.isNotEmpty(key) && mapProperties.get(language) != null){
            strMessage = mapProperties.get(language).getProperty(key);
            if(StringUtils.isEmpty(strMessage)){
                strMessage = key;
            }
        }
        return  strMessage;
    }

}

2.在resources文件中增加properties文件MessageConfig_en-US.properties和MessageConfig_zh-CN.properties两个文件，上面工具类会动态匹配指定的文件