Lucene escapes characters that contain query keywords.

http://www.oschina.net/question/1092_560
Escaping special characters
Lucene supports escaping special characters in queries, and the following is a list of special characters for Lucene:
+-&& | | ! ( ) { } [ ] ^ " ~ * ? : \
Escape special characters We can use the symbol "\" before the character. For example we want to search: 2, we can use the following syntax:
\ (1\+1\) \:2 Lucene Self-band function Queryparser.escape (q) can convert the characters in Q that contain query keywords! such as: *,? such as

Lucene escapes characters that contain query keywords.