Spring 国际化@Autowired MessageSource 配置文件读取顺序
代码逻辑示例{
// 遍历循环配置文件basename集合.
for (String baseName : Arrays.asList("spring.messages.basename")){
/**
* 根据 locale 遍历父级的locale对象,
* {@link ResourceBundle.Control.CandidateListCache#createObject(sun.util.locale.BaseLocale)}
* {@link ResourceBundle.Control.CandidateListCache#getDefaultList(java.lang.String, java.lang.String, java.lang.String, java.lang.String)}
* 当父级遍历完毕, 设置当前locale对象为系统默认locale对象.
* {@link ResourceBundleMessageSource#resolveCodeWithoutArguments(java.lang.String, java.util.Locale)}
*/
for (String locale : Arrays.asList("locale", "parentLocale", "defaultLocale", "defaultParentLocale")) {
// 如果当前keySet集合存在该元素则返回对应数据并结束遍历.
if (ResourceBundle.getBundle(baseName, Locale.forLanguageTag(locale)).keySet().contains("目标读取key")) {
return ResourceBundle.getBundle(baseName, Locale.forLanguageTag(locale)).getString("目标读取key");
}
}
}
return "默认值";
}效果展示
spring.messages.basename=i18n/messages,other,messages
当前配置文件:
resources/i18n/messages.properties
resources/i18n/messages_en.properties
resources/i18n/messages_ja_JP.properties
resources/i18n/messages_zh.properties
resources/i18n/messages_zh_CN.properties
resources/messages.properties
resources/messages_en.properties
resources/messages_ja_JP.properties
resources/messages_zh.properties
resources/messages_zh_CN.properties
resources/other.properties
resources/other_en.properties
resources/other_ja_JP.properties
resources/other_zh.properties
resources/other_zh_CN.properties
en-US读取配置顺序:i18n/messages_en_US.properties
en-US读取配置顺序:i18n/messages_en.properties
en-US读取配置顺序:i18n/messages_zh_CN.properties
en-US读取配置顺序:i18n/messages_zh.properties
en-US读取配置顺序:i18n/messages.properties
en-US读取配置顺序:other_en_US.properties
en-US读取配置顺序:other_en.properties
en-US读取配置顺序:other_zh_CN.properties
en-US读取配置顺序:other_zh.properties
en-US读取配置顺序:other.properties
en-US读取配置顺序:messages_en_US.properties
en-US读取配置顺序:messages_en.properties
en-US读取配置顺序:messages_zh_CN.properties
en-US读取配置顺序:messages_zh.properties
en-US读取配置顺序:messages.properties
ja读取配置顺序:i18n/messages_ja.properties
ja读取配置顺序:i18n/messages_zh_CN.properties
ja读取配置顺序:i18n/messages_zh.properties
ja读取配置顺序:i18n/messages.properties
ja读取配置顺序:other_ja.properties
ja读取配置顺序:other_zh_CN.properties
ja读取配置顺序:other_zh.properties
ja读取配置顺序:other.properties
ja读取配置顺序:messages_ja.properties
ja读取配置顺序:messages_zh_CN.properties
ja读取配置顺序:messages_zh.properties
ja读取配置顺序:messages.properties```源码示例
遍历basename源代码: org.springframework.context.support.ResourceBundleMessageSource#resolveCodeWithoutArguments
当前baseName获取不到对应的bundle 则根据默认的locale进行取值.
https://img2023.cnblogs.com/blog/1056621/202303/1056621-20230307095157358-1031146965.png
填充locale的父级locale源代码: java.util.ResourceBundle.Control.CandidateListCache#getDefaultListhttps://img2023.cnblogs.com/blog/1056621/202303/1056621-20230307095342437-1434515062.png
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