lucene常用搜索总结

lucene常用搜索总结2008-04-17 09:02转载一篇文章，在此只为搜藏和大家查询方便。

public class Test{    
        
     Analyzer analyzer = new StandardAnalyzer();    
        
     RAMDirectory directory = new RAMDirectory();    
        
    /** 
      * 创建索引 
      * 
      * @throws IOException 
      */   
    public void index() throws IOException{    
            
         IndexWriter indexWriter = new IndexWriter(directory,analyzer,true);    
            
         Document doc1 = new Document();    
            
         doc1.add(new Field("title","aaabbb",Store.YES,Index.TOKENIZED));    
            
         doc1.add(new Field("content","If you would like to help promote OpenOffice",Store.YES,Index.TOKENIZED));    
            
         doc1.add(new Field("time","2005",Store.YES,Index.TOKENIZED));    
            
         indexWriter.addDocument(doc1);    
            
         Document doc2 = new Document();    
            
         doc2.add(new Field("title","bbcc",Store.YES,Index.TOKENIZED));    
            
         doc2.add(new Field("content","sdfsdfsdfasdds",Store.YES,Index.TOKENIZED));    
            
         doc2.add(new Field("time","2007",Store.YES,Index.TOKENIZED));    
            
         indexWriter.addDocument(doc2);    
            
         indexWriter.optimize();    
            
         indexWriter.close();    
     }    
        
    // 按词条搜索    
    public void termSearcher() throws IOException{    
            
         IndexSearcher searcher = new IndexSearcher(directory);    
            
        // 查询title中包含aaa    
         Term term = new Term("title","aaa");    
            
         Query query = new TermQuery(term);    
            
         searcher.search(query);    
        
         searcher.close();    
     }    
   
    // 短语搜索    
    public void phraseSearcher() throws IOException{    
            
         IndexSearcher searcher = new IndexSearcher(directory);    
            
         PhraseQuery phraseQuery = new PhraseQuery();    
            
        // slop 两个项的位置之间允许的最大间隔,这里would和help中间只隔了like(to会被去掉),所以最大间隔设为1就能找到值    
        // 对于两个相连的关键词来说,无论坡度设为多少,都可以找到    
        // 对于不相连的词来说,当两个关键词相隔数小于坡度都可以找到,否则找不到    
         phraseQuery.setSlop(1);    
            
         phraseQuery.add(new Term("content","would"));    
            
         phraseQuery.add(new Term("content","help"));    
            
        // 如果将help放前面,would放后面,需要将would向后移动3个位置才能到help后面(to不算),所以要设为slop最少要设为3    
        // phraseQuery.add(new Term("content","help"));    
            
        // phraseQuery.add(new Term("content","would"));    
            
        // phraseQuery.setSlop(3);    
            
        // 短语的评分是根据项之间距离越小,评分越高,否则越小    
         Hits hits =   searcher.search(phraseQuery);    
            
         printResult(hits);    
            
         searcher.close();    
     }    
        
    // 通配符搜索 WildcardQuery       
    // 通配符包括’?’匹配一个任意字符和’*’匹配零个或多个任意字符，例如你搜索’use*’，你可能找到’user’或者’uses’：       
    public void wildcardSearcher() throws IOException{    
            
             IndexSearcher searcher = new IndexSearcher(directory);    
                
            // 与正则一样,*代表0个或多个字母,?代表0个或一个字母    
            // WildcardQuery与QueryParser不同的是:WildcardQuery的前缀可以为*,而QueryParser不行    
             WildcardQuery query = new WildcardQuery(new Term("content","a?bbb*"));    
                
             Hits hits = searcher.search(query);    
                
             printResult(hits);    
                
             searcher.close();    
     }    
        
    // 模糊搜索 FuzzyQuery    
    public void fuzzySearcher() throws IOException{    
                
             IndexSearcher search = new IndexSearcher(directory);    
                
            // OpenOffica虽然没被索引,但能找到相近的OpenOffice    
             FuzzyQuery query = new FuzzyQuery(new Term("content","OpenOffica"));    
                
             Hits hits = search.search(query);    
                
             printResult(hits);    
                
             search.close();    
     }    
        
    // 使用前缀PrefixQuery    
    public void prefixSearcher() throws IOException{    
            
             IndexSearcher search = new IndexSearcher(directory);    
                
            // 全部title前缀为a    
             PrefixQuery query = new PrefixQuery(new Term("title","b"));    
                
             Hits hits = search.search(query);    
                
             printResult(hits);    
                
             search.close();    
                
     }    
   
    // 范围搜索 RangeQuery    
    public void rangeSearcher() throws IOException{    
            
         IndexSearcher search = new IndexSearcher(directory);    
            
        // RangeQuery query = new RangeQuery(beginTime, endTime, false);    
        // 开始时间,结束时间,最后一个参数表示是否包含边界条件本身,如果为false    
         RangeQuery query = new RangeQuery(new Term("time","2005"),new Term("time","2007"),true);    
            
         Hits hits = search.search(query);    
            
         printResult(hits);    
            
         search.close();    
     }    
        
        
    // 与或搜索BooleanQuery    
    //BooleanClause用于表示布尔查询子句关系的类，包括：BooleanClause.Occur.MUST，BooleanClause.Occur.MUST_NOT，BooleanClause.Occur.SHOULD。有以下6种组合：    
   
    //1．MUST和MUST：取得连个查询子句的交集。    
   
    //2．MUST和MUST_NOT：表示查询结果中不能包含MUST_NOT所对应得查询子句的检索结果。    
   
    //3．MUST_NOT和MUST_NOT：无意义，检索无结果。    
   
    //4．SHOULD与MUST、SHOULD与MUST_NOT：SHOULD与MUST连用时，无意义，结果为MUST子句的检索结果。与MUST_NOT连用时，功能同MUST。    
   
    //5．SHOULD与SHOULD：表示“或”关系，最终检索结果为所有检索子句的并集。    
   
    public void booleanSearcher() throws IOException, ParseException{    
            
         IndexSearcher search = new IndexSearcher(directory);    
            
         QueryParser qp1 = new QueryParser("title",new StandardAnalyzer());    
                
         Query query1 = qp1.parse("aa*");    
                
         QueryParser qp2 = new QueryParser("title",new StandardAnalyzer());    
                
         Query query2 = qp2.parse("bb*");    
                
         BooleanQuery query = new BooleanQuery();    
                
        // 搜索结果的title的前双缀可以是aa,或bb    
         query.add(query1, BooleanClause.Occur.SHOULD);    
                
        // BooleanClause.Occur.MUST 必须    
        // BooleanClause.Occur.MUST_NOT 必须不是    
         query.add(query2, BooleanClause.Occur.SHOULD);    
            
         Hits hits = search.search(query);    
                
         printResult(hits);    
            
         search.close();    
            
     }    
        
   
    // 多关键的搜索 PhrasePrefixQuery    
    public void phrasePrefixSearcher() throws IOException{    
            
         IndexSearcher search = new IndexSearcher(directory);    
            
         PhrasePrefixQuery query = new PhrasePrefixQuery();    
            
        // 这里两项都有可能首先被匹配    
         query.add(new Term[]{new Term("content","would"),new Term("content","can")});    
            
        // 只有一项必须匹配    
         query.add(new Term("content","help"));    
            
        // If you would like to help promote OpenOffice    
        // can I help you    
        // slop因子的作用域为查询中的所有短语    
         query.setSlop(1);    
            
        // 匹配第一项为 would 或 can 第二项为help    
        // solp设置为1    
        // If you would like to help promote OpenOffice   除去if to 外,would与help的距离=1    
        // can I help you 的距离也=1   所以可以搜索出两条数据    
            
         Hits hits = search.search(query);    
            
         printResult(hits);    
            
         search.close();    
     }    
        
    // 在多个域上查询 MultiFieldQueryParser    
    public void multiFieldSearcher() throws IOException, ParseException{    
            
         IndexSearcher search = new IndexSearcher(directory);    
            
        // 默认情况下的方式为Occur.SHOULD    
        // titile可以匹配bb,content可以匹配you    
//       MultiFieldQueryParser.parse(new String[]{"bb","you"},new String[]{"title","content"}, analyzer);    
            
        // titile必须匹配bb,content不能匹配    
         Query query = MultiFieldQueryParser.parse( new String[]{"bb","you"},new String[]{"title","content"},new BooleanClause.Occur[]{Occur.MUST,Occur.MUST_NOT}, analyzer);    
            
        // title中必须包含bb   content不能有bb    
        // Query query = MultiFieldQueryParser.parse( "bb*",new String[]{"title","content"},new BooleanClause.Occur[]{BooleanClause.Occur.MUST,BooleanClause.Occur.MUST_NOT}, analyzer);    
            
         Hits hits = search.search(query);    
            
         printResult(hits);    
            
         search.close();    
     }    
        
    public void printResult(Hits hits) throws IOException{    
        for(int i = 0; i < hits.length(); i++){    
             Document d = hits.doc(i);    
             System.out.println(d.get("title"));    
             System.out.println(d.get("content"));    
             System.out.println(d.get("time"));    
         }    
     }