本文由美白面膜排行榜整理全文检索例子lucene3搜索引擎,索引建立搜索排序分页高亮显示, IKAnalyzer分词public class LuceneService {private final Log logger = LogFactory.getLog(LuceneService.class);private final String dirPath = "d:/temp/user";Analyzer analyzer = new IKAnalyzer();Directory directory = null;IndexWriter writer = null;IndexSearcher indexSearcher = null;private void confirmDirs() {File indexFile = new File(dirPath);if (!indexFile.exists()) {indexFile.mkdirs();}if (!indexFile.exists() || !indexFile.canWrite()) {if (logger.isDebugEnabled())logger.error("索引文件目录创建失败或不可写入！");}}public void init() {confirmDirs();try {File f = new File(dirPath);directory = FSDirectory.open(f);} catch (Exception e) {if (logger.isDebugEnabled()) {logger.error("解除索引文件锁定失败！" +e.getCause());}}}public void createIndex(List<User> userList) {init();try {// 第一个参数是存放索引目录有FSDirectory（存储到磁盘上）和RAMDirectory（存储到内存中），// 第二个参数是使用的分词器，第三个：true，建立全新的索引，false,建立增量索引，第四个是建立的索引的最大长度writer = new IndexWriter(directory, analyzer,true,IndexWriter.MaxFieldLength.LIMITED);writer.setMergeFactor(500);writer.setMaxBufferedDocs(155);writer.setMaxFieldLength(Integer.MAX_VALUE);writeIndex(writer, userList);writer.optimize();writer.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public List<User> search(String keyword) {File indexFile = new File(dirPath);if (!indexFile.exists()) {return null;}Directory dir;try {dir = FSDirectory.open(indexFile);indexSearcher = new IndexSearcher(dir);indexSearcher.setSimilarity(new IKSimilarity()); // 单字段查询,单条件查询// Query query = IKQueryParser.parse("userInfo", keyword);// 多字段，单条件查询String[] fields = new String[] { "userInfo", "parameter1" };Query query = IKQueryParser.parseMultiField(fields, keyword);// 多字体，单条件，多BooleanClause.Occur[] flags ，查询条件的组合方式（Or/And）// BooleanClause.Occur[]数组,它表示多个条件之间的关系, // BooleanClause.Occur.MUST表示 and,// BooleanClause.Occur.MUST_NOT表示not,// BooleanClause.Occur.SHOULD表示or.// String[] fields =newString[]{"userInfo","parameter1"};// BooleanClause.Occur[] flags=new//BooleanClause.Occur[]{BooleanClause.Occur.MUST,BooleanClause.Occur.SHOULD};// Query query = IKQueryParser.parseMultiField(fields, // keyword,flags);// //多Field，多条件查询分析// String[] fields =newString[]{"userInfo","parameter1"};// String[] queries = new String[]{keyword,keyword};// Query query =IKQueryParser.parseMultiField(fields,queries);// 多Field,多条件,多Occur 查询// String[] fields =newString[]{"userInfo","parameter1"};// String[] queries = new String[]{keyword,keyword};// BooleanClause.Occur[] flags=new//BooleanClause.Occur[]{BooleanClause.Occur.MUST,BooleanClause.Occur .SHOULD};// Query query =//IKQueryParser.parseMultiField(fields,queries,flags);// 搜索相似度最高的20条记录TopDocs topDocs = indexSearcher.search(query, 20);ScoreDoc[] hits = topDocs.scoreDocs;return hitsToQuery(hits, query);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}private List<User> hitsToQuery(ScoreDoc[] hits, Query query) {List<User> list = new ArrayList<User>();try {for (int i = 0; i < hits.length; i++) {User u = new User();Document doc = indexSearcher.doc(hits[i].doc);u.setUserId(Integer.parseInt(doc.get("userId")));u.setUserName(doc.get("userName"));u.setUserAge(Integer.parseInt(doc.get("userAge")));// 高亮设置SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("<font color=\"red\">","</font>");Highlighter highlighter = newHighlighter(simpleHtmlFormatter,new QueryScorer(query));TokenStream tokenStream =analyzer.tokenStream("text",new StringReader(doc.get("userInfo")));String userInfo =highlighter.getBestFragment(tokenStream, doc.get("userInfo"));if (userInfo != null) {u.setUserInfo(userInfo);} else {u.setUserInfo(doc.get("userInfo"));}SimpleHTMLFormatter simpleHtmlFormatter1 = new SimpleHTMLFormatter("<font color=\"red\">","</font>");Highlighter highlighter1 = new Highlighter(simpleHtmlFormatter1, newQueryScorer(query));TokenStream tokenStream1 =analyzer.tokenStream("text1",new StringReader(doc.get("parameter1")));String p1 =highlighter1.getBestFragment(tokenStream1, doc.get("parameter1"));if (p1 != null) {u.setParameter1(p1);} else {u.setParameter1(doc.get("parameter1"));}u.setParameter2(doc.get("parameter2"));u.setParameter3(doc.get("parameter3"));u.setParameter4(doc.get("parameter4"));list.add(u);}indexSearcher.close();return list;} catch (CorruptIndexException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvalidTokenOffsetsException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}public void writeIndex(IndexWriter writer, List<User> userList) {try {for (User u : userList) {Document doc = getDoc(u);writer.addDocument(doc);}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private Document getDoc(User user) {System.out.println("用户ID 为" + user.getUserId() + " 索引被创建");Document doc = new Document();addField2Doc(doc, user, "userId", Store.YES,Index.NOT_ANALYZED);addField2Doc(doc, user, "userName", Store.YES,Index.NOT_ANALYZED);// Index.NOT_ANALYZED// 不分词，但建立索引addField2Doc(doc, user, "userAge", Store.YES,Index.NOT_ANALYZED);// Index.ANALYZED// 分词并且建立索引addField2Doc(doc, user, "userInfo", Store.YES,Index.ANALYZED);addField2Doc(doc, user, "parameter1", Store.YES,Index.ANALYZED);addField2Doc(doc, user, "parameter2", Store.YES,Index.ANALYZED);addField2Doc(doc, user, "parameter3", Store.YES,Index.ANALYZED);addField2Doc(doc, user, "parameter4", Store.YES,Index.ANALYZED);return doc;}private void addField2Doc(Document doc, Object bean, String name, Store s,Index i) {String value;try {value = BeanUtils.getProperty(bean, name);if (value != null) {doc.add(new Field(name, value, s, i,Field.TermVector.WITH_POSITIONS_OFFSETS));}} catch (IllegalAccessException e) {logger.error("get bean property error", e);} catch (InvocationTargetException e) {logger.error("get bean property error", e);} catch (NoSuchMethodException e) {logger.error("get bean property error", e);}}/*** 没有排序，有高亮，有分页** @param pageNo* @param pageSize* @param keyword* @return*/public PageBean getPageQuery(int pageNo, int pageSize, String keyword) {List result = new ArrayList();File indexFile = new File(dirPath);if (!indexFile.exists()) {return null;}Directory dir;try {dir = FSDirectory.open(indexFile);indexSearcher = new IndexSearcher(dir);indexSearcher.setSimilarity(new IKSimilarity());String[] fields = new String[] { "userInfo","parameter1" };BooleanClause.Occur[] flags = new BooleanClause.Occur[] {BooleanClause.Occur.MUST,BooleanClause.Occur.SHOULD };Query query = IKQueryParser.parseMultiField(fields, keyword, flags);TopScoreDocCollector topCollector = TopScoreDocCollector.create(indexSearcher.maxDoc(), true);indexSearcher.search(query, topCollector);// 查询当页的记录ScoreDoc[] docs = topCollector.topDocs((pageNo - 1) * pageSize,pageSize).scoreDocs;// String[] highlightCol = {"userInfo", "parameter1"}; // 高亮设置SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("<font color=\"red\">", "</font>"); Highlighter highlighter = newHighlighter(simpleHtmlFormatter,new QueryScorer(query));for (ScoreDoc scdoc : docs) {User u = new User();Document doc = indexSearcher.doc(scdoc.doc);//// for (Fieldable fa : doc.getFields()) {// System.out.println(());// String value = doc.get(());// for (String col : highlightCol) {// if(().equals(col)) {// //设置高显内容// TokenStream tokenStream =analyzer.tokenStream("text",new// StringReader(value));// value = highlighter.getBestFragment(tokenStream, value);// }// }//// }u.setUserId(Integer.parseInt(doc.get("userId")));u.setUserName(doc.get("userName"));u.setUserAge(Integer.parseInt(doc.get("userAge")));TokenStream tokenStream =analyzer.tokenStream("text",new StringReader(doc.get("userInfo")));String userInfo =highlighter.getBestFragment(tokenStream, doc.get("userInfo"));if (userInfo != null) {u.setUserInfo(userInfo);} else {u.setUserInfo(doc.get("userInfo"));}TokenStream tokenStream1 =analyzer.tokenStream("text1",new StringReader(doc.get("parameter1")));String p1 =highlighter.getBestFragment(tokenStream1, doc.get("parameter1"));if (p1 != null) {u.setParameter1(p1);} else {u.setParameter1(doc.get("parameter1"));}u.setParameter2(doc.get("parameter2"));u.setParameter3(doc.get("parameter3"));u.setParameter4(doc.get("parameter4"));result.add(u);}PageBean pb = new PageBean();pb.setCurrentPage(pageNo);// 当前页pb.setPageSize(pageSize);pb.setAllRow(topCollector.getTotalHits());// hit中的记录数目pb.setList(result);return pb;} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvalidTokenOffsetsException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}/*** 排序，有高亮，有分页** @param pageNo* @param pageSize* @param keyword* @return*/public PageBean getPageQuery2(int pageNo, int pageSize, String keyword) {List result = new ArrayList();File indexFile = new File(dirPath);if (!indexFile.exists()) {return null;}Directory dir;try {dir = FSDirectory.open(indexFile);indexSearcher = new IndexSearcher(dir);indexSearcher.setSimilarity(new IKSimilarity());String[] fields = new String[] { "userInfo", "parameter1" };BooleanClause.Occur[] flags = new BooleanClause.Occur[] {BooleanClause.Occur.MUST,BooleanClause.Occur.SHOULD };Query query = IKQueryParser.parseMultiField(fields, keyword, flags);// 多字段排序，设置在前面的会优先排序SortField[] sortFields = new SortField[2];SortField sortField = new SortField("userId",SortField.INT, false);//false升序，true降序SortField FIELD_SEX = new SortField("userAge", SortField.INT, true);sortFields[0] = sortField;sortFields[1] = FIELD_SEX;Sort sort = new Sort(sortFields);TopDocs topDocs = indexSearcher.search(query, null, 50, sort);if (topDocs.totalHits != 0) {// for(ScoreDoc sd : topDocs.scoreDocs) {//// }// 高亮设置SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("<font color=\"red\">", "</font>");Highlighter highlighter = newHighlighter(simpleHtmlFormatter,new QueryScorer(query));for (int i = (pageNo - 1) * pageSize; i < pageSize * pageNo; i++) {ScoreDoc scdoc = topDocs.scoreDocs[i];User u = new User();Document doc = indexSearcher.doc(scdoc.doc); u.setUserId(Integer.parseInt(doc.get("userId")));u.setUserName(doc.get("userName"));u.setUserAge(Integer.parseInt(doc.get("userAge")));TokenStream tokenStream =analyzer.tokenStream("text",newStringReader(doc.get("userInfo")));String userInfo =highlighter.getBestFragment(tokenStream,doc.get("userInfo"));if (userInfo != null) {u.setUserInfo(userInfo);} else {u.setUserInfo(doc.get("userInfo"));}TokenStream tokenStream1 =analyzer.tokenStream("text1",newStringReader(doc.get("parameter1")));String p1 =highlighter.getBestFragment(tokenStream1, doc.get("parameter1")); if (p1 != null) {u.setParameter1(p1);} else {u.setParameter1(doc.get("parameter1")); }u.setParameter2(doc.get("parameter2"));u.setParameter3(doc.get("parameter3"));u.setParameter4(doc.get("parameter4"));result.add(u);}PageBean pb = new PageBean();pb.setCurrentPage(pageNo);// 当前页pb.setPageSize(pageSize);pb.setAllRow(topDocs.totalHits);// hit中的记录数目 pb.setList(result);return pb;}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvalidTokenOffsetsException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}/*** 删除索引* @param userId*/public void deleIndex(String userId){try {File f = new File(dirPath);directory = FSDirectory.open(f);IndexReader reader = IndexReader.open(directory,false); Term term = new Term("userId", userId);reader.deleteDocuments(term);reader.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}高亮设置集成抽取成一个方法public String toHighlighter(Query query,Document doc,String field){ try {SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("<font color=\"red\">", "</font>");Highlighter highlighter = newHighlighter(simpleHtmlFormatter,new QueryScorer(query));TokenStream tokenStream1 =analyzer.tokenStream("text",new StringReader(doc.get(field)));String highlighterStr =highlighter.getBestFragment(tokenStream1, doc.get(field));return highlighterStr == null ? doc.get(field):highlighterStr;} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvalidTokenOffsetsException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}。
