Document doc = new Document();
doc.add(new TextField("productName", productName, Field.Store.YES));
doc.add(new FloatField("price", Float.parseFloat(price), Field.Store.YES));
//+additional fields
我想搜索产品并过滤到价格范围。有人能告诉我如何对这些结果应用过滤器吗?
String[] queryStrings = {searchTerm};
String[] fields = {"itemName"}; //might query multiple fields in future
try {
Query q = MultiFieldQueryParser.parse(luceneVersion, queryStrings, fields, analyzer); // assuming I might want to search additional fields like description in the future
IndexReader reader = DirectoryReader.open(indexDirectory);
IndexSearcher searcher = new IndexSearcher(reader);
TopDocs td = searcher.search(q, to);
// Not sure how to filter here, I eventually will want to save these results for pagination
} catch (Exception e){
e.printStackTrace();
}
答案 0 :(得分:1)
您是否考虑过添加NumericRangeQuery
并将其与BooleanQuery
中的初始查询相结合?
您可以使用MUST
clause
答案 1 :(得分:0)
我有一个类似的要求,即将字段搜索与范围过滤器结合起来。我最终得到了以下代码
Set<String> fieldSet = Sets.newHashSet();
fieldSet.add(rangeQueryField);
BooleanQuery fieldsQuery = new BooleanQuery();
for (String field : fields) {
fieldSet.add(field);
WildcardQuery queryPart = new WildcardQuery(new Term(field, queryText));
fieldsQuery.add(queryPart, Occur.SHOULD);
}
BooleanQuery query = new BooleanQuery();
query.add(fieldsQuery, Occur.MUST);
NumericRangeFilter<Long> longNumericRangeFilter = NumericRangeFilter.newLongRange(rangeQueryField, rangeValue, Long.MAX_VALUE, false, false);
MultiFieldQueryParser queryParser = new MultiFieldQueryParser(version, fieldSet.toArray(new String[0]), analyzer);
queryParser.setAllowLeadingWildcard(true);
Query q = queryParser.parse(query.toString());
TopFieldDocs searchResults = searcher.search(q, longNumericRangeFilter, maxResultsToReturn, sort);