P2P最易遭受的DDoS攻击以及防御手段

public static void main(String args[]) throws CorruptIndexException,IOException, ParseException {

        // IndexSearcher是实现搜索的关键

        IndexSearcher searcher = new IndexSearcher(FSDirectory.open(new File("X:/jspublisher/doc/entryindex")), true);

        /*       

         //多条件

            BooleanQuery bQuery = new BooleanQuery();

            Query query1 = null;

            BooleanClause.Occur[] flags = new BooleanClause.Occur[] {BooleanClause.Occur.SHOULD,BooleanClause.Occur.SHOULD};

            query1 = MultiFieldQueryParser.parse(Version.LUCENE_29,"如何",
new String[] {"ENTRY_NAME","DESC1"}, flags, new IKAnalyzer());

            bQuery.add(query1, Occur.MUST);

        */

        //模糊查询

       Term term1 = new Term("ENTRY_NAME","数"+"~");

      // Term term1 = new Term("DESC0","goog");

       FuzzyQuery query = new FuzzyQuery(term1,0.1f,1);

      

        //精确匹配

/*        // query代表查询对象

        Query query = null;

        // 查询解析器， 将查询content字段

        QueryParser parser = new QueryParser(Version.LUCENE_29,"DESC", new IKAnalyzer());

        query = parser.parse(queryStr);

        // 搜索结果保存在TopScoreDocCollector.

*/        TopScoreDocCollector c = TopScoreDocCollector.create(100, true);

        // 搜索

        searcher.search(query, c);

   

        // 得到满足条件的文档总数

        System.out.println("总共搜索到 " + c.getTotalHits() + " 个资源。");

        // 得到文档集合

        ScoreDoc[] docs = c.topDocs(0, c.getTotalHits()).scoreDocs;

       

        //存储符合条件的记录 

        int startIndex = 0,endIndex = 10; //startIndex、endIndex做为分页用

       

        ArrayList<String> list=new ArrayList<String>(); 

        for (int i = startIndex;i < endIndex && i < docs.length; i++) {

            Document documents = searcher.doc(i);

            int sum = Integer.parseInt(documents.get("DESC_COUNT"));

            //注解

            for(int a = 0 ;a < sum ;a++ ){

                //Document documentss = searcher.doc(a);

                System.out.println("count_desc--"+documents.get("DESC"+a));

            }

                Document document=searcher.doc(docs[i].doc);

                int did = docs[i].doc;

                String d = String.valueOf(did);

                list.add(d);

                System.out.println("文档id: " + docs[i].doc+" 评分： "+docs[i].score+" 内容： "+document.get("ENTRY_NAME"));

        }

        System.out.println(list);

    }