多个TermQuery或一个MultiFieldQueryParser构建BooleanQuery多个域的检索学习实例代码
import java.io.IOException;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
/**
* 与或非布尔查询——Lucene中的BooleanQuery
* @author USER
*
*/
public class TestBooleanQuery {
/**
* 主函数，运行测试程序
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
//建索引
createIndex();
//多个TermQuery构建BooleanQuery检索
searchIndex4TermQuery();
//一个MultiFieldQueryParser构建BooleanQuery多个域的检索
searchIndex4MultiFieldQueryParser();
}
/**
* 建索引
* @throws Exception
*/
public static void createIndex() throws Exception {
Document doc1 = new Document();
Field field = null;
field = new Field("name", "word1 word2 word3", Field.Store.YES,
Field.Index.TOKENIZED);
doc1.add(field);
field = new Field("title", "doc1", Field.Store.YES, Field.Index.TOKENIZED);
doc1.add(field);
Document doc2 = new Document();
field = new Field("name", "word4 word5", Field.Store.YES,
Field.Index.TOKENIZED);
doc2.add(field);
field = new Field("title", "doc2", Field.Store.YES, Field.Index.TOKENIZED);
doc2.add(field);
Document doc3 = new Document();
field = new Field("name", "word1 word2 word6", Field.Store.YES,
Field.Index.TOKENIZED);
doc3.add(field);
field = new Field("title", "doc3", Field.Store.YES, Field.Index.TOKENIZED);
doc3.add(field);
/**
* 为测试MultiFieldQueryParser而添加的文档
*/
Document doc4 = new Document();
field = new Field("name", "word1 word2 word3", Field.Store.YES,
Field.Index.TOKENIZED);
doc4.add(field);
field = new Field("title", "doc1 word1", Field.Store.YES, Field.Index.TOKENIZED);
doc4.add(field);
/**
* 对MultiFieldQueryParser更深理解
*/
Document doc5 = new Document();
field = new Field("title", "北京2008年奥运会", Field.Store.YES,
Field.Index.TOKENIZED);
doc5.add(field);
field = new Field("name", "这是一届创造奇迹、超越梦想的.......", Field.Store.YES, Field.Index.TOKENIZED);
doc5.add(field);
Document doc6 = new Document();
field = new Field("title", "北京2008年奥运会", Field.Store.YES,
Field.Index.TOKENIZED);
doc6.add(field);
field = new Field("name", "这是一届创造奇迹、超越梦想的奥运会.......", Field.Store.YES, Field.Index.TOKENIZED);
doc6.add(field);
IndexWriter writer = new IndexWriter("e://java//index",
new StandardAnalyzer(), true);
writer.addDocument(doc1);
writer.addDocument(doc2);
writer.addDocument(doc3);
writer.addDocument(doc4);
writer.addDocument(doc5);
writer.addDocument(doc6);
writer.close();
}
/**
* 由TermQuery和BooleanQuery构建的多个域检索
* @throws Exception
*/
public static void searchIndex4TermQuery() throws Exception{
TermQuery query1 = null;
TermQuery query2 = null;
TermQuery query3 = null;
TermQuery query4 = null;
TermQuery query5 = null;
TermQuery query6 = null;
BooleanQuery bquerymain = null;
BooleanQuery bquery1 = null;
BooleanQuery bquery2 = null;
BooleanQuery bquery3 = null;
Hits hits = null;
IndexSearcher searcher = new IndexSearcher("e://java//index");
query1 = new TermQuery(new Term("name", "word1"));
query2 = new TermQuery(new Term("name", "word2"));
query3 = new TermQuery(new Term("name", "word3"));
query4 = new TermQuery(new Term("name", "word4"));
query5 = new TermQuery(new Term("name", "word5"));
query6 = new TermQuery(new Term("name", "word6"));
// 构造布尔查询（可根据你的要求随意组合）
bquerymain = new BooleanQuery();
bquery1 = new BooleanQuery();
bquery2 = new BooleanQuery();
bquery3 = new BooleanQuery();
bquery1.add(query1, BooleanClause.Occur.MUST);
bquery1.add(query3, BooleanClause.Occur.MUST);
bquery2.add(query3, BooleanClause.Occur.MUST);
bquery2.add(query4, BooleanClause.Occur.MUST);
bquery3.add(query5, BooleanClause.Occur.MUST);
bquery3.add(query6, BooleanClause.Occur.MUST_NOT);
bquerymain.add(bquery1, BooleanClause.Occur.SHOULD);
bquerymain.add(bquery2, BooleanClause.Occur.SHOULD);
bquerymain.add(bquery3, BooleanClause.Occur.MUST);
/**
* 根据你的要求建一个BooleanQuery对象，然后来查询
*/
hits = searcher.search(bquery3);
printResult(hits, bquery1.toString());
}
/**
* 由MultiFieldQueryParser和BooleanQuery构建的多个域检索
* @throws Exception
*/
public static void searchIndex4MultiFieldQueryParser() throws Exception{
Hits hits = null;
IndexSearcher searcher = new IndexSearcher("e://java//index");
// 构造布尔查询（可根据你的要求随意组合）
BooleanClause.Occur[] flags = new BooleanClause.Occur[] {
BooleanClause.Occur.MUST, BooleanClause.Occur.MUST};
Query query = MultiFieldQueryParser.parse("word1", new String[] {
"name", "title"}, flags, new StandardAnalyzer());
/* //加深对MultiFieldQueryParser的理解（注意看建索引的文档doc5,doc6与检索后的结果）
Query query = MultiFieldQueryParser.parse("北京 奥运会", new String[] {
"name", "title"}, flags, new StandardAnalyzer()); */
hits = searcher.search(query);
printResult(hits, query.toString());
}
/**
* 打印输出检索出的文档，并输出检索的布尔语句
* @param hits
* @param key
* @throws Exception
*/
public static void printResult(Hits hits, String key) throws Exception {
System.out.println("查询 " + key);
if (hits != null) {
if (hits.length() == 0) {
System.out.println("没有找到任何结果");
} else {
System.out.println("找到" + hits.length() + "个结果");
for (int i = 0; i < hits.length(); i++) {
Document d = hits.doc(i);
String dname = d.get("title");
System.out.print(dname + " ");
}
System.out.println();
System.out.println();
}
}
}
}