Lucene5.3中的Filter

来源：互联网发布：蓝巨星软件编辑：程序博客网时间：2024/04/26 05:12

最近在学习Lucene，使用的是5.3.0版本。

学习到filter的使用时，发现在Lucene5中filter的好多子类都过时了，例如

@Deprecatedpublic class TermFilter extends QueryWrapperFilter

并且query方法也过时了

/** Finds the top <code>n</code>   * hits for <code>query</code>, applying <code>filter</code> if non-null.   *   * @throws BooleanQuery.TooManyClauses If a query would exceed    *         {@link BooleanQuery#getMaxClauseCount()} clauses.   * @deprecated Use {@link BooleanQuery boolean queries} with   *              {@link BooleanClause.Occur#FILTER} clauses instead   */  @Deprecated  public final TopDocs search(Query query, Filter filter, int n)

那怎么使用filter功能呢？

//在Lucene 5 中 filter的使用：//filter是一种特殊的queryQuery query = new TermQuery(new Term("title","lucene"));Query filter1 = new TermQuery(new Term("subject","lucene"));Query filter2 = NumericRangeQuery.newIntRange("pubmonth", 199908, 201005, true, true);BooleanQuery booleanFilter = new BooleanQuery.Builder().add(filter1, Occur.MUST).add(filter2, Occur.MUST).build();QueryWrapperFilter filter = new QueryWrapperFilter(booleanFilter);BooleanQuery booleanQuery = new BooleanQuery.Builder().add(filter, Occur.FILTER).add(query, Occur.MUST).build();TopDocs topDocs = indexSearcher.search(booleanQuery, Integer.MAX_VALUE);

对滴，是通过 Occur.FILTER 标识对应的查询是filter，这个在查询是就会做对应的处理。

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