Java中的弹性搜索查询：包含字符串查询？

Question

I work in Java with Elastic-search and want to filter data by "contains string" parameter.

For example: retrieve a list of children whose names start with 'r'.

But search query (code below) returns the list of children with names equal (not contains) to 'r'.

I've tried "r*" - no luck.

  builder.must(QueryBuilders.queryStringQuery("r*")
                .field("child_name")
                .lenient(true)
                .escape(true)
                .analyzeWildcard(false)
                .fuzziness(Fuzziness.ZERO)
                .defaultOperator(Operator.AND)
                .boost(2.0f));
    }

Answer 1

Try another type of QueryBuilder - WildcardQueryBuilder :

Implements the wildcard search query. Supported wildcards are *, which matches any character sequence (including the empty one), and ?, which matches any single character. Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with one of the wildcards * or ?.

Example:

QueryBuilder qb = QueryBuilders.wildcardQuery("user", "k?mc*");

Answer 2

Finally, I found the problem by me-self. My problems were two:

.analyzeWildcard(false)
.boost(2.0f))

I change to:

.analyzeWildcard(true)
.boost(1.0f))

And it helped.