elasticsearch7.9 中怎么实现全文检索

今天就跟大家聊聊有关elasticsearch7.9 中怎么实现全文检索，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

1、bool should查询

//should条件 类似于or//1、全文检索  key  // bool的Should方式查询BoolQueryBuilder boolShouldQueryBuilder=new BoolQueryBuilder();if(StringUtils.isNotBlank(key)){      boolShouldQueryBuilder.should(new MatchQueryBuilder("name", key).boost(3f));      boolShouldQueryBuilder.should(new MatchQueryBuilder("keyword", key).boost(2f));      boolShouldQueryBuilder.should(new MatchQueryBuilder("cnames", key).boost(0.5f));      boolShouldQueryBuilder.should(new MatchQueryBuilder("ckeywords", key).boost(0.5f));      boolShouldQueryBuilder.should(new MatchQueryBuilder("ccontents", key).boost(0.5f));}else{      boolShouldQueryBuilder.should(new MatchAllQueryBuilder()); }    boolQueryBuilder.must(boolShouldQueryBuilder);

2、multiMatchQueryBuilder

//1、全文检索  key// MultiMatch方式查询if(StringUtils.isNotBlank(key)){        //设置字段权重        Map fields = new HashMap();        fields.put("name", 5f);        fields.put("keyword", 4f);   fields.put("cnames", 2f);        fields.put("ckeywords", 1f);        fields.put("ccontents", 1f);    //查询    MultiMatchQueryBuilder multiMatchQueryBuilder = new MultiMatchQueryBuilder(key,"name", "keyword", "cnames", "ckeywords", "ccontents").fields(fields);    boolQueryBuilder.must(multiMatchQueryBuilder);}else{    boolQueryBuilder.must(new MatchAllQueryBuilder());}

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