java中rangeQuery和termQuery可以同时使用吗
时间: 2023-08-08 18:13:26 浏览: 93
是的,Java中的Lucene库可以同时使用rangeQuery和termQuery,以组合查询来实现更复杂的搜索需求。例如,如果您想在指定的时间范围内搜索所有包含特定关键字的文档,则可以使用rangeQuery来限制时间范围,使用termQuery来搜索关键字。
下面是一个使用Java实现的例子:
```
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import java.io.IOException;
import java.nio.file.Paths;
public class RangeAndTermQueryExample {
public static void main(String[] args) throws IOException {
Directory directory = FSDirectory.open(Paths.get("index"));
IndexReader reader = DirectoryReader.open(directory);
IndexSearcher searcher = new IndexSearcher(reader);
// term query
Query termQuery = new TermQuery(new Term("title", "java"));
// range query
Query rangeQuery = NumericRangeQuery.newLongRange("timestamp", 1000000000000L, 2000000000000L, true, true);
// boolean query
BooleanQuery.Builder builder = new BooleanQuery.Builder();
builder.add(termQuery, BooleanClause.Occur.MUST);
builder.add(rangeQuery, BooleanClause.Occur.MUST);
Query query = builder.build();
TopDocs topDocs = searcher.search(query, 10);
for (int i = 0; i < topDocs.scoreDocs.length; i++) {
Document doc = searcher.doc(topDocs.scoreDocs[i].doc);
System.out.println(doc.get("title") + " - " + doc.get("timestamp"));
}
reader.close();
directory.close();
}
}
```
在上面的例子中,我们首先创建了一个termQuery和rangeQuery,然后使用BooleanQuery.Builder将它们组合成一个布尔查询。在布尔查询中,我们使用BooleanClause.Occur.MUST来表示两个查询都必须匹配才能返回结果。最后,我们将布尔查询传递给IndexSearcher.search()方法来执行查询。
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