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Elasticsearch 全文检索，高亮搜索，相似度排序优化
POST index_name/_search
{
"from":0,
"size":10,
"query":{
"bool":{
"filter": [
{
"term": {
"columnClassification": {
"value": "新闻"
}
}
}
],
"should":[
{
"multi_match":{
"query":"国家已规划福州至台北交通建设",
"fields":[
"title^3.0"
],
"type":"best_fields",
"operator":"OR",
"analyzer":"ik_smart",
"slop":0,
"prefix_length":0,
"max_expansions":50,
"minimum_should_match":"90%",
"zero_terms_query":"NONE",
"auto_generate_synonyms_phrase_query":true,
"fuzzy_transpositions":false,
"boost":1
}
},
{
"multi_match":{
"query":"国家已规划福州至台北交通建设",
"fields":[
"content^1.0",
"summary^2.0"
],
"type":"best_fields",
"operator":"OR",
"analyzer":"ik_smart",
"slop":0,
"prefix_length":0,
"max_expansions":50,
"minimum_should_match":"75%",
"zero_terms_query":"NONE",
"auto_generate_synonyms_phrase_query":true,
"fuzzy_transpositions":false,
"boost":1
}
}
],
"adjust_pure_negative":true,
"boost":1
}
},
"_source":{
"includes":[
"title",
"summary",
"source",
"content"
]
},"highlight":{
"pre_tags":[
"<b class='hlt' style='color:red'>"
],
"post_tags":[
"</b>"
],
"fragment_size":150,
"number_of_fragments":1,
"type":"plain",
"no_match_size":150,
"fields":{
"title":{
},
"summary":{
},
"content":{
}
}
}
}
minimum_should_match
最小匹配度设置：100% 全匹配 可以相对精确匹配查询结果
"title^3.0"
提升字段评分权重，确保主要字段排序在前面
should
通过should 组合多个multi_match 查询结果，用来控制不会条件的minimum_should_match值
"operator":"OR"
多个分词查询关系
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