lucene 例子

package org.cnos.lucene.core; import java.io.File; import java.io.IOException; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.TokenStream; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.Field.Index; import org.apache.lucene.document.Field.Store; import org.apache.lucene.document.Field.TermVector; import org.apache.lucene.index.CorruptIndexException; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.Term; import org.apache.lucene.index.TermPositionVector; import org.apache.lucene.search.Hits; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.TermQuery; import org.apache.lucene.search.highlight.Highlighter; import org.apache.lucene.search.highlight.QueryScorer; import org.apache.lucene.search.highlight.SimpleFragmenter; import org.apache.lucene.search.highlight.SimpleHTMLFormatter; import org.apache.lucene.search.highlight.TokenSources; import org.cnos.util.Configuration; public class CreateIndex { Analyzer analyzer = new StandardAnalyzer(); /** * 创建索引 * * @throws IOException */ public void index() throws IOException{ Configuration rc = new Configuration("c:/test.properties");//相对路径 File INDEX_DIR = new File(rc.getValue("indexDir")); //如果目录不存在创建目录 if (!INDEX_DIR.exists()) { INDEX_DIR.mkdir(); } IndexWriter indexWriter = new IndexWriter(INDEX_DIR,analyzer,true); Document doc1 = new Document(); doc1.add(new Field("newsSecondTitle","张营长",Store.YES,Index.TOKENIZED,TermVector.WITH_POSITIONS_OFFSETS)); indexWriter.addDocument(doc1); Document doc2 = new Document(); doc2.add(new Field("newsSecondTitle","刘舒服",Store.YES,Index.TOKENIZED,TermVector.WITH_POSITIONS_OFFSETS)); indexWriter.addDocument(doc2); Document doc3 = new Document(); doc3.add(new Field("newsSecondTitle","梵语里",Store.YES,Index.TOKENIZED,TermVector.WITH_POSITIONS_OFFSETS)); indexWriter.addDocument(doc3); indexWriter.optimize(); indexWriter.close(); } // 进行搜索 public void searcher() throws IOException{ Configuration rc = new Configuration("c:/test.properties");//相对路径 String INDEX_DIR = rc.getValue("indexDir"); IndexReader reader; Hits hits =null; TermQuery query ; try { reader = IndexReader.open(INDEX_DIR); IndexSearcher searcher = new IndexSearcher(INDEX_DIR); query = new TermQuery(new Term("newsSecondTitle","里")); hits = searcher.search(query); //高亮显示设置 SimpleHTMLFormatter simpleHTMLFormatter = new SimpleHTMLFormatter("<font color='red'>","</font>"); Highlighter highlighter =new Highlighter(simpleHTMLFormatter,new QueryScorer(query)); // 这个100是指定关键字字符串的context的长度，你可以自己设定，因为不可能返回整篇正文内容 highlighter.setTextFragmenter(new SimpleFragmenter(100)); for(int i = 0; i < hits.length(); i++){ Document doc = hits.doc(i); TermPositionVector termFreqVector = (TermPositionVector)reader.getTermFreqVector(hits.id(i), "newsSecondTitle"); TokenStream tokenStream = TokenSources.getTokenStream(termFreqVector); String result = highlighter.getBestFragment(tokenStream, doc.get("newsSecondTitle")); System.out.println(doc.get("newsSecondTitle")); System.out.println(result); } } catch (CorruptIndexException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void main(String[] args) throws IOException { CreateIndex test = new CreateIndex(); test.index(); test.searcher(); } } package org.cnos.util; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.Properties; /** * 读取properties文件 * @author Qutr * */ public class Configuration { private Properties propertie; private FileInputStream inputFile; private FileOutputStream outputFile; /** *//** * 初始化Configuration类 */ public Configuration() { propertie = new Properties(); } /** *//** * 初始化Configuration类 * @param filePath 要读取的配置文件的路径+名称 */ public Configuration(String filePath) { propertie = new Properties(); try { inputFile = new FileInputStream(filePath); propertie.load(inputFile); inputFile.close(); } catch (FileNotFoundException ex) { System.out.println("读取属性文件--->失败！- 原因：文件路径错误或者文件不存在"); ex.printStackTrace(); } catch (IOException ex) { System.out.println("装载文件--->失败!"); ex.printStackTrace(); } }//end ReadConfigInfo() /** *//** * 重载函数，得到key的值 * @param key 取得其值的键 * @return key的值 */ public String getValue(String key) { if(propertie.containsKey(key)){ String value = propertie.getProperty(key);//得到某一属性的值 return value; } else return ""; }//end getValue() /** *//** * 重载函数，得到key的值 * @param fileName properties文件的路径+文件名 * @param key 取得其值的键 * @return key的值 */ public String getValue(String fileName, String key) { try { String value = ""; inputFile = new FileInputStream(fileName); propertie.load(inputFile); inputFile.close(); if(propertie.containsKey(key)){ value = propertie.getProperty(key); return value; }else return value; } catch (FileNotFoundException e) { e.printStackTrace(); return ""; } catch (IOException e) { e.printStackTrace(); return ""; } catch (Exception ex) { ex.printStackTrace(); return ""; } }//end getValue() /** *//** * 清除properties文件中所有的key和其值 */ public void clear() { propertie.clear(); }//end clear(); /** *//** * 改变或添加一个key的值，当key存在于properties文件中时该key的值被value所代替， * 当key不存在时，该key的值是value * @param key 要存入的键 * @param value 要存入的值 */ public void setValue(String key, String value) { propertie.setProperty(key, value); }//end setValue() /** *//** * 将更改后的文件数据存入指定的文件中，该文件可以事先不存在。 * @param fileName 文件路径+文件名称 * @param description 对该文件的描述 */ public void saveFile(String fileName, String description) { try { outputFile = new FileOutputStream(fileName); propertie.store(outputFile, description); outputFile.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException ioe){ ioe.printStackTrace(); } }//end saveFile() public static void main(String[] args) { Configuration rc = new Configuration("c:/test.properties");//相对路径 String ip = rc.getValue("name");//以下读取properties文件的值 String host = rc.getValue("age"); String tab = rc.getValue("tab"); rc.setValue("std", "lisi"); System.out.println("ip = " + ip + "ip-test leng = " + "ip-test".length());//以下输出properties读出的值 System.out.println("ip's length = " + ip.length()); System.out.println("host = " + host); System.out.println("tab = " + tab); rc.saveFile("c:/test.properties", "zhayingwrite"); }//end main() }//end class ReadConfigInfo #zhanghouyingwrite #Fri Jun 27 11:07:47 CST 2008 indexDir=c:/index age=23 name=zhanghouying tab=spring