使用lucene PrefixQuery 根据拼音前缀查询
PrefixQuery类似于 数据库中的 like 'a%'查询
以下是测试代码，这种方式的缺陷是人为的分出了更多的term，目前还在找有没有更优的方法。
测试代码：

public static String index_path3="D:\\ix3";public static void main(String[]args) throws Exception{//createPrefixIndex();                //前缀查询Query trquery  = new PrefixQuery(new Term("pinyin","ghai" ));   IndexReader  indexReader = IndexReader.open(FSDirectory.open(new File(index_path3)));Searcher  searcher = new IndexSearcher(indexReader);TopDocs topDocs = searcher.search(trquery,100);for (ScoreDoc hits:topDocs.scoreDocs){Document doc = searcher.doc(hits.doc);System.out.println("doc = "+doc.get("hotelName"));}}/** * 创建pinyin索引 */public static void createPrefixIndex(){Analyzer  analyzer = new IKAnalyzer();PerFieldAnalyzerWrapper  perFieldAnalyzerWrapper = new PerFieldAnalyzerWrapper(analyzer);try {//perFieldAnalyzerWrapper.addAnalyzer("price", new WhitespaceAnalyzer());IndexWriter writer = new IndexWriter(FSDirectory.open(new File(index_path3)), perFieldAnalyzerWrapper, true,IndexWriter.MaxFieldLength.LIMITED);Document doc  = new Document();String pinyin="shanghai";                         int len = pinyin.length();   //将拼音截取保存                        for(int i=0;i<len;i++){   String value = pinyin.substring(i,len);   doc.add(new Field("pinyin", value, Field.Store.YES, Field.Index.NOT_ANALYZED));}doc.add(new Field("hotelName", "test2", Field.Store.YES, Field.Index.ANALYZED));writer.addDocument(doc);doc  = new Document();doc.add(new Field("hotelName", "test3", Field.Store.YES, Field.Index.ANALYZED));pinyin="beijing";len = pinyin.length();   for(int i=0;i<len;i++){   String value = pinyin.substring(i,len);   doc.add(new Field("pinyin", value, Field.Store.YES, Field.Index.NOT_ANALYZED));}writer.addDocument(doc);doc  = new Document();doc.add(new Field("hotelName", "test6", Field.Store.YES, Field.Index.ANALYZED));pinyin="zhongguo_benxi";len = pinyin.length();   for(int i=0;i<len;i++){   String value = pinyin.substring(i,len);   doc.add(new Field("pinyin", value, Field.Store.YES, Field.Index.NOT_ANALYZED));}writer.addDocument(doc);doc  = new Document();doc.add(new Field("hotelName", "test1", Field.Store.YES, Field.Index.ANALYZED));pinyin="tianjin";len = pinyin.length();   for(int i=0;i<len;i++){   String value = pinyin.substring(i,len);   doc.add(new Field("pinyin", value, Field.Store.YES, Field.Index.NOT_ANALYZED));}writer.addDocument(doc);writer.close();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}