Lucene使用正则表达式查询

 

//导入类包import org.apache.lucene.search.regex.*; 



public static void regexQuery(String path) throws IOException 
    { 
        IndexWriter writer = new IndexWriter(path, new StandardAnalyzer(), true); 
        writer.setUseCompoundFile(false); 

        Document doc1 = new Document(); 
        Document doc2 = new Document(); 
        Document doc3 = new Document(); 

        Field f1 = new Field("url", 
        "http://www.abc.com/product?typeid=1&category=10&item=34", 
        Field.Store.YES, Field.Index.TOKENIZED); 
        Field f2 = new Field("url", 
        "http://www.def.com/product/show?typeid=3&catagory=10&item=23", 
        Field.Store.YES, Field.Index.TOKENIZED); 
        Field f3 = new Field( 
        "url", 
        "http://www.ghi.com/product/list?catagory=4&typeid=19&order=32", 
        Field.Store.YES, Field.Index.TOKENIZED); 
        doc1.add(f1); 
        doc2.add(f2); 
        doc3.add(f3); 
        
        writer.addDocument(doc1); 
        writer.addDocument(doc2); 
        writer.addDocument(doc3); 

        writer.close(); 

        IndexSearcher searcher = new IndexSearcher(path); 
    //  创建一个正则表达式，用于匹配域名为abc.com的地址 
        String regex = "http://[a-z]{1,3}\.abc\.com/.*"; 

        Term t = new Term("url", regex); 
        
        RegexQuery query = new RegexQuery(t); 
        Query q = new TermQuery(new Term("url", "http")); 
        Hits hits = searcher.search(query); 
        for (int i = 0; i  < hits.length(); i++) { 
        System.out.println(hits.doc(i)); 
        } 
        searcher.close(); 
    }