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This guide will give you an introduce on how to auto scan properties files into MessageSource without hard coding file names in Java.
The message file may be complex with depth.
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| /src/main/resources/
----/i18n/
-------->msg1_zh_CN.properties
-------->msg1_en_US.properties
-------->msg1.properties
-------->detp2/msg2_zh_CN.properties
-------->detp2/msg2_en_US.properties
-------->detp2/msg2.properties
...
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In the legacy way of MessageSource, we call setBasename with hard code.
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| @Configuration
public class I18nConfiguration {
@Bean
public MessageSource messageSource() {
ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
messageSource.setBasename("classpath:/i18n/msg1","classpath:/i18n/detp2/msg2","classpath:/i18n/mesg3");
messageSource.setDefaultEncoding("UTF-8");
return messageSource;
}
}
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Here is the solutino with Mybatis VFS API(It saved your time but break the cohesion)
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| @Configuration
public class I18nConfiguration {
@Bean
public MessageSource messageSource() {
ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
try{
List<String> list = VFS.getInstance().list("i18n");
List<String> properties = list.stream()
.filter(s-> s.endWith(".properties"))
.map(s -> "classpath:" + s.replaceAll("_.*\\.properties", ""))
.distinct().toArray();
messageSource.setBasename(properties);
messageSource.setDefaultEncoding("UTF-8");
return messageSource;
}catch (Exception e){
throw new BeanCreationException("scan failed", e);
}
}
}
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