UTF-8 text is garbled when form is posted as multipart/form-data

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I had the same problem using Apache commons-fileupload.
I did not find out what causes the problems especially because I have the UTF-8 encoding in the following places:
1. HTML meta tag
2. Form accept-charset attribute
3. Tomcat filter on every request that sets the “UTF-8” encoding

-> My solution was to especially convert Strings from ISO-8859-1 (or whatever is the default encoding of your platform) to UTF-8:

new String (s.getBytes ("iso-8859-1"), "UTF-8");

hope that helps

Edit: starting with Java 7 you can also use the following:

new String (s.getBytes (StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);

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