用Lucene做一个简单的Java搜索工具

时间:2007-01-22 15:42:41 来源:剑心博客作者: 点击:次出处:技术无忧

    /**
     *
     *@paramqueryString
     *@returnHits
     *@throwsSearchException
     */
    public Hits serach(String queryString) throws SearchException {
       if (parser == null)
           thrownew SearchException("parser is null!");
       try {
           returnsearcher.search(parser.parse(queryString));
       } catch (IOException ioe) {
           thrownew SearchException(ioe.getMessage());
       } catch (ParseException pe) {
           thrownew SearchException(pe.getMessage());
       }
    }

    /**
     *
     *输出hits的结果，从start开始到end，不包括end
     *
     *@paramhits
     *@paramstart
     *@paramend
     *@throwsSearchException
     */
    publicstatic Hits display(Hits hits, int start, int end) throws SearchException {
       try {
           while (start < end) {
              Document doc = hits.doc(start);
              String path = doc.get("path");
              if (path != null) {
                  System.out.println((start + 1) + "- " + path);
              } else {
                  System.out.println((start + 1) + "- " + "No such path");
              }
              start++;
           }
       } catch (IOException ioe) {
           thrownew SearchException(ioe.getMessage());
       }
       return hits;
    }
main方法
    /**
     *@paramargs
     */
    publicstaticvoid main(String[] args) throws Exception {

       String field = "contents";
       String index = "./index";
       finalint rows_per_page = 2;
       finalchar NO = 'n';

       SearchJavaFiles sjf = new SearchJavaFiles(new IndexSearcher(IndexReader.open(index)));
       sjf.setParser(field, new StandardAnalyzer());
       BufferedReader in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));

       while (true) {
           System.out.println("Query: ");
           String line = in.readLine();
           if (line == null || line.length() < 2) {
              System.out.println("eixt query");
              break;
           }
           Hits hits = sjf.serach(line);
           System.out.println("searching for " + line + " Result is ");

           int len = hits.length();
           int i = 0;
           if (len > 0)
              while (true) {
                  if (i + rows_per_page >= len) {
                     SearchJavaFiles.display(hits, i, len);
                     break;
                  } else {
                     SearchJavaFiles.display(hits, i, i += rows_per_page);
                     System.out.println("more y/n?");
                     line = in.readLine();
                     if (line.length() < 1 || line.charAt(0) == NO)
                         break;
                  }
              }
           else
              System.out.println("not found");
       }
    }
}

SearchException.java
package powerwind;

publicclass SearchException extends Exception {

    public SearchException(String message) {
       super("Throw SearchException while searching files: " + message);
    }

}

完善设想：
1、文件格式：
能够处理Zip文件Jar文件，索引里面的java源文件。
通过反射机制索引class类文件。
2、输入输出：
除控制台输入输出外，还可以选择从文件读取查询关键字，输出查询结果到文件。
3、用户界面：
图形界面操作，双击查询结果的某条记录可以打开相应文件。
4、性能方面
索引文件时，用缓存和多线程处理

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