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From "Eric Isakson" <>
Subject RE: Does Lucene support UNICODE?
Date Tue, 08 Jun 2004 17:42:37 GMT
org.apache.lucene.demo.FileDocument.Document(File) is invoked from IndexFiles and does:

    Reader reader = new BufferedReader(new InputStreamReader(is));

Notice that the InputStreamReader does not specify an encoding so your default encoding is
being used.

You should probably write your own glue to create your index that knows how to properly read
your files in the appropriate encoding.

Also, please don't cross post to the dev and user lists, this is an appropriate question for
the user list.


-----Original Message-----
From: Satish Kagathare [] 
Sent: Tuesday, June 08, 2004 3:07 AM
To: Lucene Users List;
Subject: Does Lucene support UNICODE?


Does Lucene support UNICODE search and indexing of UNICODE 
data(especially..Devnagari unicode data)?
Does it make any difference between utf-8 & utf-16 unicode docs? Bcoz 
java strings supports utf-16.

Bcoz i tried indexing(using indexFiles & indexHTML from lucene Demo) 
devnagari uni data(utf-8 & utf-16) & seraching for query using tomcat, 
but it shows only utf-8 files and also shows files which does not 
contain query. Also It does not show summary of fetched docs in correct 

Also i have changed unicode range in HTMLparser.jj, StandardTokenizer.jj & 
QueryParser.jj and analyzer while indexing and parsing query but it does 
not reflect any changes in output.
shall i have to write my own analyzer for devnagari unicode data or 
Standaranalyzer will work for any languages?

Or does it require more changes? Plz mention problems and solutions. 

Thanks in advance
Satish Kagathara,
IIT Bombay.      


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