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Editorial Team
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Asked: 2026-05-24T22:02:44+00:00

I am working on j2ee project. It is supposed to work width both english

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I am working on j2ee project. It is supposed to work width both english and russian language. So I have an EncodingFilter which has mapping ‘ /* ‘ and every time do one thing: request.setCharacterEncoding("UTF-8");

I also have MySQL 5.5 installed, the charset of tables and databases is set to utf-8 and collation to utf8_general_ci.

On my local machine everything works just fine, Russian lang properly stores in db.

Then I tried to test my app on jelastic.com . There I also selected MySQL, imported dump, set charset to utf-8 and collation to utf8_general_ci. When I am adding russian words to db I only see ‘?????’. But elder records which came with dump are fine! I have literaly no idea what is wrong.

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1 Answer

  1. Editorial Team

    You need to tell the MySQL JDBC driver to use UTF-8 as client side encoding instead of the platform default one. If the platform default charset is not UTF-8, then this will result in ? being stored in the database whenever a character is not covered by the platform default charset which the JDBC driver is using.

    You could do that by adding the useUnicode=yes and characterEncoding=UTF-8 parameters to the JDBC URL. E.g.

    jdbc:mysql://localhost:3306/db_name?useUnicode=yes&characterEncoding=UTF-8

    That it works on your local Java development environment is likely because you’ve already configured the platform default charset of your environment to be UTF-8.

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