【正文】 、 QueryParser解析查詢語句生成查詢對象 代碼為： QueryParser parser = new QueryParser(, contents, new StandardAnalyzer())。 Query query = (+(+apple* boy) (cat* dog) (eat~ foods))。 此過程相對復(fù)雜，涉及 JavaCC， QueryParser， 分詞器，查詢語法等，本章不會詳細(xì)論述，會在后面的章節(jié)中一一說明。 此處唯一要說明的是，根據(jù)查詢語句生成的是一個 Query樹，這棵樹很重要，并且會生成其他的樹，一直貫穿整個索引過程。 query BooleanQuery (id=96) | boost | clauses ArrayListE (id=98) | elementData Object[10] (id=100) |[0] BooleanClause (id=102) | | occur BooleanClause$Occur$1 (id=106) | | name MUST //AND | | ordinal 0 | |query BooleanQuery (id=108) | | boost | | clauses ArrayListE (id=112) | | elementData Object[10] (id=113) | |[0] BooleanClause (id=114) | | | occur BooleanClause$Occur$1 (id=106) | | | name MUST //AND | | | ordinal 0 | | |query PrefixQuery (id=116) | | boost | | numberOfTerms 0 | | prefix Term (id=117) | | field contents | | text apple | | rewriteMethod MultiTermQuery$1 (id=119) | | docCountPercent | | termCountCutoff 350 | |[1] BooleanClause (id=115) | | occur BooleanClause$Occur$3 (id=123) | | name MUST_NOT //NOT | | ordinal 2 | |query TermQuery (id=125) | boost | term Term (id=127) | field contents | text boy | size 2 | disableCoord false | minNrShouldMatch 0 |[1] BooleanClause (id=104) | | occur BooleanClause$Occur$2 (id=129) | | name SHOULD //OR | | ordinal 1 | |query BooleanQuery (id=131) | | boost | | clauses ArrayListE (id=133) | | elementData Object[10] (id=134) | |[0] BooleanClause (id=135) | | | occur BooleanClause$Occur$2 (id=129) | | | name SHOULD //OR | | | ordinal 1 | | |query PrefixQuery (id=137) | | boost | | numberOfTerms 0 | | prefix Term (id=138) | | field contents | | text cat | | rewriteMethod MultiTermQuery$1 (id=119) | | docCountPercent | | termCountCutoff 350 | |[1] BooleanClause (id=136) | | occur BooleanClause$Occur$2 (id=129) | | name SHOULD //OR | | ordinal 1 | |query TermQuery (id=140) | boost | term Term (id=141) | field contents | text dog | size 2 | disableCoord false | minNrShouldMatch 0 |[2] BooleanClause (id=105) | occur BooleanClause$Occur$3 (id=123) | name MUST_NOT //NOT | ordinal 2 |query BooleanQuery (id=143) | boost | clauses ArrayListE (id=146) | elementData Object[10] (id=147) |[0] BooleanClause (id=148) | | occur BooleanClause$Occur$2 (id=129) | | name SHOULD //OR | | ordinal 1 |