2. 指定数字范围查询NumericRangeQuery
3. 指定字符串开头搜索PrefixQuery
4. 组合查询BooleanQuery
New maven project ->
Create a simple project ->
Group Id: com.andrew.lucene
Artifact Id: Lucene04
Version: 0.0.1-SNAPSHOT
Packaging: jar
pom.xml4.0.0 com.andrew.lucene Lucene04 0.0.1-SNAPSHOT org.apache.lucene lucene-core 5.3.1 org.apache.lucene lucene-queryparser 5.3.1 org.apache.lucene lucene-analyzers-common 5.3.1 junit junit 4.12
Indexer.java代码
package com.andrew.lucene;
import java.nio.file.Paths;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.IntField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
public class Indexer {
private Integer ids[] = { 1, 2, 3 };
private String citys[] = { "aingdao", "banjing", "changhai" };
private String descs[] = { "Qingdao is b beautiful city.", "Nanjing is c city of culture.",
"Shanghai is d bustling city." };
private Directory dir;
// 获取IndexWriter实例
private IndexWriter getWriter() throws Exception {
Analyzer analyzer = new StandardAnalyzer(); // 标准分词器
IndexWriterConfig iwc = new IndexWriterConfig(analyzer);
IndexWriter writer = new IndexWriter(dir, iwc);
return writer;
}
// 生成索引
private void index(String indexDir) throws Exception {
dir = FSDirectory.open(Paths.get(indexDir));
IndexWriter writer = getWriter();
for (int i = 0; i < ids.length; i++) {
Document doc = new Document();
doc.add(new IntField("id", ids[i], Field.Store.YES));
doc.add(new StringField("city", citys[i], Field.Store.YES));
doc.add(new TextField("desc", descs[i], Field.Store.YES));
writer.addDocument(doc); // 添加文档
}
writer.close();
}
public static void main(String[] args) throws Exception {
new Indexer().index("E:\\lucene5");
}
}
SearchTest.java代码
package com.andrew.lucene;
import java.nio.file.Paths;
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.NumericRangeQuery;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.BytesRef;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class SearchTest {
private Directory dir;
private IndexReader reader;
private IndexSearcher is;
@Before
public void setUp() throws Exception {
dir = FSDirectory.open(Paths.get("E:\\lucene5"));
reader = DirectoryReader.open(dir);
is = new IndexSearcher(reader);
}
@After
public void tearDown() throws Exception {
reader.close();
}
// 指定项范围搜索
@Test
public void testTermRangeQuery() throws Exception {
TermRangeQuery query = new TermRangeQuery("desc", new BytesRef("b".getBytes()), new BytesRef("c".getBytes()), true, true);
TopDocs hits = is.search(query, 10);
for (ScoreDoc scoreDoc : hits.scoreDocs) {
Document doc = is.doc(scoreDoc.doc);
System.out.println(doc.get("id"));
System.out.println(doc.get("city"));
System.out.println(doc.get("desc"));
}
}
// 指定数字范围
@Test
public void testNumericRangeQuery() throws Exception {
NumericRangeQuery query = NumericRangeQuery.newIntRange("id", 1, 2, true, true);
TopDocs hits = is.search(query, 10);
for (ScoreDoc scoreDoc : hits.scoreDocs) {
Document doc = is.doc(scoreDoc.doc);
System.out.println(doc.get("id"));
System.out.println(doc.get("city"));
System.out.println(doc.get("desc"));
}
}
// 指定字符串开头搜索
@Test
public void testPrefixQuery() throws Exception {
PrefixQuery query = new PrefixQuery(new Term("city", "a"));
TopDocs hits = is.search(query, 10);
for (ScoreDoc scoreDoc : hits.scoreDocs) {
Document doc = is.doc(scoreDoc.doc);
System.out.println(doc.get("id"));
System.out.println(doc.get("city"));
System.out.println(doc.get("desc"));
}
}
// 多条件查询
@Test
public void testBooleanQuery() throws Exception {
NumericRangeQuery query1 = NumericRangeQuery.newIntRange("id", 1, 2, true, true);
PrefixQuery query2 = new PrefixQuery(new Term("city", "a"));
BooleanQuery.Builder booleanQuery = new BooleanQuery.Builder();
booleanQuery.add(query1, BooleanClause.Occur.MUST);
booleanQuery.add(query2, BooleanClause.Occur.MUST);
TopDocs hits = is.search(booleanQuery.build(), 10);
for (ScoreDoc scoreDoc : hits.scoreDocs) {
Document doc = is.doc(scoreDoc.doc);
System.out.println(doc.get("id"));
System.out.println(doc.get("city"));
System.out.println(doc.get("desc"));
}
}
}
运行结果：
1
aingdao
Qingdao is b beautiful city.
2
banjing
Nanjing is c city of culture.
3
changhai
Shanghai is d bustling city.
1
aingdao
Qingdao is b beautiful city.
2
banjing
Nanjing is c city of culture.
1
aingdao
Qingdao is b beautiful city.
1
aingdao
Qingdao is b beautiful city.