Why doesn't Spring use locale `en` when given `en_US`?












0















Related but not the same as this answer. I have



@Bean
public LocaleResolver localeResolver() {
AcceptHeaderLocaleResolver ahlr = new AcceptHeaderLocaleResolver();
ahlr.setDefaultLocale(Locale.ENGLISH);
return ahlr;
}


And my browser is sending Accept-Language: en-US,en;q=0.9. I have messages_en.properties (but not messages.properties). I get this error



javax.servlet.jsp.JspTagException: No message found under code 'title' for locale 'en_US'.


I know I can fix it by renaming messages_en.properties to messages.properties, but why doesn't Spring Boot find the en locale when given en_US?



I expect this to be a problem when someone has fr_FR locale instead of just fr. Must I really duplicate the locales for every single country?



How can I make Spring smarter to use the language if the specific country locale is not found?



Spring Boot 1.5.13, Spring Core 4.3.17










share|improve this question


















  • 1





    Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

    – M. Deinum
    Nov 21 '18 at 18:03











  • I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

    – M. Deinum
    Nov 21 '18 at 18:18
















0















Related but not the same as this answer. I have



@Bean
public LocaleResolver localeResolver() {
AcceptHeaderLocaleResolver ahlr = new AcceptHeaderLocaleResolver();
ahlr.setDefaultLocale(Locale.ENGLISH);
return ahlr;
}


And my browser is sending Accept-Language: en-US,en;q=0.9. I have messages_en.properties (but not messages.properties). I get this error



javax.servlet.jsp.JspTagException: No message found under code 'title' for locale 'en_US'.


I know I can fix it by renaming messages_en.properties to messages.properties, but why doesn't Spring Boot find the en locale when given en_US?



I expect this to be a problem when someone has fr_FR locale instead of just fr. Must I really duplicate the locales for every single country?



How can I make Spring smarter to use the language if the specific country locale is not found?



Spring Boot 1.5.13, Spring Core 4.3.17










share|improve this question


















  • 1





    Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

    – M. Deinum
    Nov 21 '18 at 18:03











  • I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

    – M. Deinum
    Nov 21 '18 at 18:18














0












0








0








Related but not the same as this answer. I have



@Bean
public LocaleResolver localeResolver() {
AcceptHeaderLocaleResolver ahlr = new AcceptHeaderLocaleResolver();
ahlr.setDefaultLocale(Locale.ENGLISH);
return ahlr;
}


And my browser is sending Accept-Language: en-US,en;q=0.9. I have messages_en.properties (but not messages.properties). I get this error



javax.servlet.jsp.JspTagException: No message found under code 'title' for locale 'en_US'.


I know I can fix it by renaming messages_en.properties to messages.properties, but why doesn't Spring Boot find the en locale when given en_US?



I expect this to be a problem when someone has fr_FR locale instead of just fr. Must I really duplicate the locales for every single country?



How can I make Spring smarter to use the language if the specific country locale is not found?



Spring Boot 1.5.13, Spring Core 4.3.17










share|improve this question














Related but not the same as this answer. I have



@Bean
public LocaleResolver localeResolver() {
AcceptHeaderLocaleResolver ahlr = new AcceptHeaderLocaleResolver();
ahlr.setDefaultLocale(Locale.ENGLISH);
return ahlr;
}


And my browser is sending Accept-Language: en-US,en;q=0.9. I have messages_en.properties (but not messages.properties). I get this error



javax.servlet.jsp.JspTagException: No message found under code 'title' for locale 'en_US'.


I know I can fix it by renaming messages_en.properties to messages.properties, but why doesn't Spring Boot find the en locale when given en_US?



I expect this to be a problem when someone has fr_FR locale instead of just fr. Must I really duplicate the locales for every single country?



How can I make Spring smarter to use the language if the specific country locale is not found?



Spring Boot 1.5.13, Spring Core 4.3.17







spring spring-boot spring-internationalization






share|improve this question













share|improve this question











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asked Nov 21 '18 at 17:45









ChloeChloe

11k1982198




11k1982198








  • 1





    Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

    – M. Deinum
    Nov 21 '18 at 18:03











  • I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

    – M. Deinum
    Nov 21 '18 at 18:18














  • 1





    Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

    – M. Deinum
    Nov 21 '18 at 18:03











  • I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

    – M. Deinum
    Nov 21 '18 at 18:18








1




1





Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

– M. Deinum
Nov 21 '18 at 18:03





Because you need the message.properties (can be empty) to add a proper MessageSource. It will then use the messages_en.properties. But the messages.properties is required as the ultimate fallback (and the trigger for Spring Boot to enable a pre-configured MessageSource).

– M. Deinum
Nov 21 '18 at 18:03













I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

– M. Deinum
Nov 21 '18 at 18:18





I'm assuming you are using Spring Boot (as the tags state). Spring Boot uses the existence of the plain <basename>.properties to add a pre-configured MessageSource. If that file isn't present, there is no MessageSource and messages aren't resolved. Also the AcceptHeaderLocaleResolver is already the default, instead of configuring it adding spring.mvc.locale=en to the application.properties is enough. So unless you aren't configuring things yourself or you aren't showing the full configuration.

– M. Deinum
Nov 21 '18 at 18:18












2 Answers
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For Spring Boot to auto configure a MessageSource it checks the existence of the <basename>.properties. If that exists a MessageSource is configured, else nothing is configured and no messages will be resolved.



To fix add an empty <basename>.properties to src/main/resource to have the MessageSource automatically configured.






share|improve this answer































    0














    Adding an empty messages.properties fixed this issue as given in the above comment. Very strange and non-intuitive error message. If the comment is given as an answer, I will accept that.






    share|improve this answer
























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      2 Answers
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      1














      For Spring Boot to auto configure a MessageSource it checks the existence of the <basename>.properties. If that exists a MessageSource is configured, else nothing is configured and no messages will be resolved.



      To fix add an empty <basename>.properties to src/main/resource to have the MessageSource automatically configured.






      share|improve this answer




























        1














        For Spring Boot to auto configure a MessageSource it checks the existence of the <basename>.properties. If that exists a MessageSource is configured, else nothing is configured and no messages will be resolved.



        To fix add an empty <basename>.properties to src/main/resource to have the MessageSource automatically configured.






        share|improve this answer


























          1












          1








          1







          For Spring Boot to auto configure a MessageSource it checks the existence of the <basename>.properties. If that exists a MessageSource is configured, else nothing is configured and no messages will be resolved.



          To fix add an empty <basename>.properties to src/main/resource to have the MessageSource automatically configured.






          share|improve this answer













          For Spring Boot to auto configure a MessageSource it checks the existence of the <basename>.properties. If that exists a MessageSource is configured, else nothing is configured and no messages will be resolved.



          To fix add an empty <basename>.properties to src/main/resource to have the MessageSource automatically configured.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 21 '18 at 18:45









          M. DeinumM. Deinum

          71.1k14142151




          71.1k14142151

























              0














              Adding an empty messages.properties fixed this issue as given in the above comment. Very strange and non-intuitive error message. If the comment is given as an answer, I will accept that.






              share|improve this answer




























                0














                Adding an empty messages.properties fixed this issue as given in the above comment. Very strange and non-intuitive error message. If the comment is given as an answer, I will accept that.






                share|improve this answer


























                  0












                  0








                  0







                  Adding an empty messages.properties fixed this issue as given in the above comment. Very strange and non-intuitive error message. If the comment is given as an answer, I will accept that.






                  share|improve this answer













                  Adding an empty messages.properties fixed this issue as given in the above comment. Very strange and non-intuitive error message. If the comment is given as an answer, I will accept that.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 21 '18 at 18:23









                  ChloeChloe

                  11k1982198




                  11k1982198






























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