用lucene创建文件索引的例子,测试通过,放到csdn有以备。
public class IndexToDisk {
private final static String filePath="D:/redixsearch/data/luceneDemoTest.txt";
private final static String indexPath="D:/redixsearch/index/";
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
//creatIndex();
testSearch();
}
public static void creatIndex() throws IOException, ParseException{
boolean isCreate = true;
IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer(Version.LUCENE_35));
if (isCreate) {
//创建新索引删除旧索引
conf.setOpenMode(OpenMode.CREATE);
} else {
// 向索引中添加新的Document
conf.setOpenMode(OpenMode.CREATE_OR_APPEND);
}
Directory dir = FSDirectory.open(new File(indexPath));
IndexWriter writer = new IndexWriter(dir, conf);
FileInputStream fis;
try {
fis = new FileInputStream(filePath);
} catch (FileNotFoundException fnfe) {
return;
}
try {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(fis, "UTF-8"));
String item = "";
String[] fields;
item = bufferedReader.readLine();
Integer id = 0;
while(!"".equals(item) && item != null) {
//System.out.println("item=" + item);
id++;
fields = item.split("::");
// 创建空文档
Document doc = new Document();
doc.add(new Field("ID", id.toString(),Field.Store.YES, Field.Index.NO));
doc.add(new Field("IDSTR", id.toString(),Field.Store.YES, Field.Index.NOT_ANALYZED));//不分词索引,其实没必要索引为了测试所以索引
NumericField idField = new NumericField("IDNUM", Field.Store.YES, true);
idField.setIntValue(id);
doc.add(idField);//用于测试数字
doc.add(new Field("PCIP", fields[0],Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("DeviceIP", fields[1],Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("DeviceSerialNum", fields[2],Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("AlarmType", fields[3],Field.Store.YES, Field.Index.ANALYZED));
//一个域可以有子集
doc.add(new Field("MultiFields", fields[2],Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("MultiFields", fields[3],Field.Store.YES, Field.Index.ANALYZED));
NumericField alarmDatetime = new NumericField("alarmDatetime", Field.Store.YES, true);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd");
alarmDatetime.setLongValue(simpleDateFormat.parse(fields[4]).getTime());
doc.add(alarmDatetime);
if (id == 5) {
doc.setBoost(1.2f);
}
if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
writer.addDocument(doc);
} else {
writer.updateDocument(new Term("ID" , id.toString()),
doc);
}
item = bufferedReader.readLine();
}
} finally {
fis.close();
}
try {
writer.close();
}catch (Exception e) {
System.out.println("Exception=" + e.toString());
}finally {
if (IndexWriter.isLocked(dir)) {
IndexWriter.unlock(dir);
}
}
}
//@Test
public static void testSearch() throws Exception{
String field = "AlarmType";
boolean raw = false;
String queryString = "中国";
int hitsPerPage = 10;
IndexSearcher searcher = new IndexSearcher(IndexReader.open(FSDirectory.open(new File(indexPath))));
BufferedReader in = null;
QueryParser parser = new QueryParser(Version.LUCENE_35, field, new StandardAnalyzer(Version.LUCENE_35));
Query query = parser.parse(queryString.trim());
//Query query = new TermQuery(new Term(field,queryString));
System.out.println("Searching for: " + query.toString(field));
TopDocs results = searcher.search(query, 5 * hitsPerPage, Sort.RELEVANCE);
ScoreDoc[] hits = results.scoreDocs;
int numTotalHits = results.totalHits;
System.out.println(numTotalHits + " total matching documents");
for (int i = 0; i < hits.length; i++) {
Document doc = searcher.doc(hits[i].doc);
System.out.println( "\tAlarmType:" + doc.get("AlarmType"));
}
searcher.close();
}
}
测试结果