javaphrase_JavaPhraseQuery.setBoost方法代码示例

import org.apache.lucene.search.PhraseQuery; //导入方法依赖的package包/类

public static BooleanQuery buildQuery(String text, String field) throws IOException {

BooleanQuery fullQuery &＃61; new BooleanQuery();

TokenStream tokStream &＃61; ANALYZER.tokenStream(field, text);

try {

tokStream.reset();

Term lastTerm &＃61; null;

while (tokStream.incrementToken()) {

String termStr &＃61; tokStream.getAttribute(CharTermAttribute.class).toString();

Term term &＃61; new Term(field, termStr);

TermQuery termQuery &＃61; new TermQuery(term);

termQuery.setBoost(0.8f);

fullQuery.add(termQuery, BooleanClause.Occur.SHOULD);

List expansionWords &＃61; WordNetExpansion.getStrictExpansion(termStr);

if (expansionWords !&＃61; null) {

for (String expTermStr : expansionWords) {

TermQuery expTermQuery &＃61; new TermQuery(new Term(field, expTermStr));

expTermQuery.setBoost(0.4f);

fullQuery.add(expTermQuery, BooleanClause.Occur.SHOULD);

}

}

if (lastTerm !&＃61; null) {

PhraseQuery bigram &＃61; new PhraseQuery();

bigram.add(lastTerm);

bigram.add(term);

bigram.setBoost(0.1f);

fullQuery.add(bigram, BooleanClause.Occur.SHOULD);

if (USE_PROXIMITY_QUERY) {

SpanNearQuery spanNearQuery &＃61; new SpanNearQuery(new SpanQuery[]{

new SpanTermQuery(lastTerm),

new SpanTermQuery(term)},

6,

false);

spanNearQuery.setBoost(0.1f);

fullQuery.add(spanNearQuery, BooleanClause.Occur.SHOULD);

}

}

lastTerm &＃61; term;

}

tokStream.end();

} finally {

tokStream.close();

}

return fullQuery;

}