?? prefixquerytest.java
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package ch11;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.RangeQuery;
public class PrefixQueryTest {
public static void main(String[] args) throws Exception {
Document doc1 = new Document();
doc1.add(Field.Text("name", "David"));
doc1.add(Field.Keyword("title", "doc1"));
Document doc2 = new Document();
doc2.add(Field.Text("name", "Darwen"));
doc2.add(Field.Keyword("title", "doc2"));
Document doc3 = new Document();
doc3.add(Field.Text("name", "Smith"));
doc3.add(Field.Keyword("title", "doc3"));
Document doc4 = new Document();
doc4.add(Field.Text("name", "Smart"));
doc4.add(Field.Keyword("title", "doc4"));
IndexWriter writer = new IndexWriter("c:\\index",
new StandardAnalyzer(), true);
writer.setUseCompoundFile(true);
writer.addDocument(doc1);
writer.addDocument(doc2);
writer.addDocument(doc3);
writer.addDocument(doc4);
writer.close();
IndexSearcher searcher = new IndexSearcher("c:\\index");
Term pre1 = new Term("name", "Da");
Term pre2 = new Term("name", "da");
Term pre3 = new Term("name", "sm");
Hits hits = null;
PrefixQuery query = null;
query = new PrefixQuery(pre1);
hits = searcher.search(query);
printResult(hits, "前綴為'Da'的文檔");
query = new PrefixQuery(pre2);
hits = searcher.search(query);
printResult(hits, "前綴為'da'的文檔");
query = new PrefixQuery(pre3);
hits = searcher.search(query);
printResult(hits, "前綴為'sm'的文檔");
}
public static void printResult(Hits hits, String key) throws Exception {
System.out.println("查找 \"" + key + "\" :");
if (hits != null) {
if (hits.length() == 0) {
System.out.println("沒有找到任何結(jié)果");
System.out.println();
} else {
System.out.print("找到");
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();
}
}
}
}
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