QueryParser

QueryParser translates query expressions into one of Lucene’s built-in query types. We’ll cover each query type in section 3.4; for now, take in the bigger picture provided by table 3.2, which shows some examples of expressions and their translation. 

Table 3.2 Expression examples that QueryParser handles

Query expression

Matches documents that...

java   Contain the term java in the default field

java junit  , java OR junit. Contain the term java or junit, or both, in the default fielda

+java +junit , java AND junit.  Contain both java and junit in the default field

title:ant.   Contain the term ant in the title field

title:extreme –subject:sports , title:extreme AND NOT subject:sports. 

Contain extreme in the title field and don’t have sports in the subject field

(agile OR extreme) AND methodology.  Contain methodology and must also contain agile and/or extreme, all in the default field

title:"junit in action".   Contain the exact phrase “junit in action” in the title field

title:"junit action"~5.    Contain the terms junit and action within five positions of one another, in the title field

java*.      Contain terms that begin with java, like javaspaces, javaserver, java.net, and the exact tem java itself.
java~.      Contain terms that are close to the word java, such as lava

lastmodified: [1/1/09 TO 12/31/09].   Have lastmodified field values between the dates January 1, 2009. and December 31, 2009

a. The default operator is OR. It can be set to AND (see section 3.5.6).
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