• Elasticsearch 带中文分词的全文检索(分页+高亮返回)

    一.全文搜索介绍

    Full text queries 全文搜索主要有以下几种类型：

    1.1 匹配查询（match query）

    1. QueryBuilder qb = matchQuery( 
    2.    "name",                  //field 字段    
    3.    "kimchy elasticsearch"   // text 
    4. );

    DSL 查询语句：

    1. GET /_search
    2. {
    3.     "query": {
    4.         "match" : {
    5.             "message" : "this is a test"
    6.         }
    7.     }
    8. }

    1.2 多字段查询（multi_match query）

    可以用来对多个字段的版本进行匹配查询

    1. QueryBuilder qb = multiMatchQuery(   
    2.  "kimchy elasticsearch", //text   
    3.  "user", "message"       //fields 多个字段
    4. );

    DSL查询语句：

    1. GET /_search
    2. {
    3.   "query": {
    4.     "multi_match" : {
    5.       "query":    "this is a test", 
    6.       "fields": [ "subject", "message" ] 
    7.     }
    8.   }
    9. }

    1.3 常用术语查询（common_terms query）

    可以对一些比较专业的偏门词语进行的更加专业的查询

    1. QueryBuilder qb = commonTermsQuery(
    2. "name",    //field 字段  
    3. "kimchy");  // value

    DSL查询语句：

    1. GET /_search
    2. {
    3.     "query": {
    4.         "common": {
    5.             "body": {
    6.                 "query": "this is bonsai cool",
    7.                 "cutoff_frequency": 0.001
    8.             }
    9.         }
    10.     }
    11. }

    1.4 查询语句查询（query_string query）

           与lucene查询语句的语法结合的更加紧密的一种查询，允许你在一个查询语句中使用多个特殊条件关键字（如：AND|OR|NOT ）对多个字段进行查询，这种查询仅限专家用户去使用。

    QueryBuilder qb = queryStringQuery("+kimchy -elasticsearch");    //text

    DSL查询语句：

    1. GET /_search
    2. {
    3.     "query": {
    4.         "query_string" : {
    5.             "default_field" : "content",
    6.             "query" : "this AND that OR thus"
    7.         }
    8.     }
    9. }

            以上四种是全文搜索可以用到的查询方式，但是一般使用多字段查询（multi_match query）比较多，这里重点写下第二种方式的使用。

    二.使用multi_match query的方式实现全文多字段的匹配查询

    2.1 检索服务

    实现一个关键字分词匹配多个字段，分页查询，命中字段高亮显示

    1. private  SearchDto getResult(ShipQueryDto shipQueryDto, String indexName, Class clazz) throws IOException, IllegalAccessException {
    2.         SearchRequest searchRequest = new SearchRequest();
    3.         searchRequest.indices(indexName);
    4.         SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
    5.  
    6.         /* 高亮查询 */
    7.         HighlightBuilder highlightBuilder = new HighlightBuilder();
    8.         highlightBuilder.numOfFragments(0); /*长度*/
    9.         highlightBuilder.preTags("");
    10.         highlightBuilder.postTags("");
    11.         highlightBuilder.highlighterType("plain");
    12.         for (String name : EsSmartIndexHelper.classMapMap.get(clazz).keySet()) {
    13.             highlightBuilder.field(name).requireFieldMatch(false);
    14.         }
    15.         sourceBuilder.highlighter(highlightBuilder);
    16.         BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
    17.         if(StringUtils.isNotEmpty(shipQueryDto.getKeys())){
    18.             boolQueryBuilder.must(QueryBuilders.multiMatchQuery(shipQueryDto.getKeys()).fields(EsSmartIndexHelper.classMapMap.get(clazz)).type(MultiMatchQueryBuilder.Type.CROSS_FIELDS)
    19. //                    .minimumShouldMatch("70%")
    20.                             //使用最细粒度分词搜索
    21.                             .analyzer("ik_max_word").operator(Operator.OR)
    22.             );
    23.         }
    24.         sourceBuilder.query(boolQueryBuilder);
    25.  
    26.         // 分页
    27.         Integer from = (shipQueryDto.getPageNum()-1) * shipQueryDto.getPageSize();
    28.         sourceBuilder.from(from);
    29.         sourceBuilder.size(shipQueryDto.getPageSize());
    30.         sourceBuilder.trackTotalHits(true);
    31.         searchRequest.source(sourceBuilder);
    32.         log.error("查询的DSL语句： " + searchRequest.source().toString());
    33.         SearchResponse searchRes = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
    34.         log.error("返回原始数据 ： " + searchRes);
    35.         SearchHit[] hits = searchRes.getHits().getHits();
    36.         List searchShipCbgkDtos = new ArrayList<>();
    37.         for (SearchHit hit : hits) {
    38.             String json = hit.getSourceAsString();
    39.             T shipDto = JSONObject.parseObject(json, clazz);
    40.             //获取高亮字段
    41.             Map highlightFields = hit.getHighlightFields();
    42.             if(CollectionUtil.isNotEmpty(highlightFields)){
    43.                 //获取class子类的字段
    44.                 Field[] fields =clazz.getDeclaredFields();
    45.                 //获取class继承父类的字段
    46.                 Field[] fields1 = clazz.getSuperclass().getDeclaredFields();
    47.                 //字段高亮处理
    48.                 for (Field field : fields1) {
    49.                     field.setAccessible(true);
    50.                     if (highlightFields.containsKey(field.getName())){
    51.                         HighlightField highlightField = highlightFields.get(field.getName());
    52.                         Text[] fragments = highlightField.fragments();
    53.                         StringBuilder text = new StringBuilder();
    54.                         for (Text fragment : fragments) {
    55.                             text.append(fragment.toString());
    56.                         }
    57.                         field.set(shipDto, text.toString());
    58.                     }
    59.                 }
    60.                 for (Field field : fields) {
    61.                     field.setAccessible(true);
    62.                     if (highlightFields.containsKey(field.getName())){
    63.                         HighlightField highlightField = highlightFields.get(field.getName());
    64.                         Text[] fragments = highlightField.fragments();
    65.                         StringBuilder text = new StringBuilder();
    66.                         for (Text fragment : fragments) {
    67.                             text.append(fragment.toString());
    68.                         }
    69.                         field.set(shipDto, text.toString());
    70.                     }
    71.                 }
    72.             }
    73.             searchShipCbgkDtos.add(shipDto);
    74.         }
    75.         SearchDto searchDto = new SearchDto<>();
    76.         searchDto.setTotal(searchRes.getHits().getTotalHits().value);
    77.         searchDto.setSearchShips(searchShipCbgkDtos);
    78.         return searchDto;
    79.     }
    80.  
    81.  
    82.  
    83. @Override
    84.     public SearchDto searchShip(ShipQueryDto shipQueryDto) throws IOException, IllegalAccessException {
    85.         return getResult(shipQueryDto, EsIndex.INDEX_SEAT_SEARCH_SHIP_CBGK.getStatus(), SearchShipCbgkDto.class);
    86.     }
    1. import lombok.Data;
    2.  
    3. import java.util.List;
    4.  
    5. /**
    6.  * 搜索返回实体
    7.  * @param 
    8.  */
    9. @Data
    10. public class SearchDto {
    11.  
    12.     /** 该库数量 */
    13.     private Long total;
    14.  
    15.     /** 该库返回列表 */
    16.     private List searchShips;
    17. }
    1. import java.util.HashMap;
    2. import java.util.Map;
    3.  
    4. /**
    5.  * 全文搜索匹配的字段和权重
    6.  */
    7. public class EsSmartIndexHelper {
    8.  
    9.     public static Map shipCbgkfields = new HashMap();
    10.  
    11.     public static HashMapextends BaseSearchDto>, Map> classMapMap = new HashMapextends BaseSearchDto>, Map>();
    12.  
    13.     static {
    14.         //船舶库
    15.         classMapMap.put(SearchShipCbgkDto.class, shipCbgkfields);
    16.         shipCbgkfields.put("shipName", 2.5f);
    17.         //            "shipId",
    18.         shipCbgkfields.put("shipRegistryPort", 1.8f);
    19.         //            "shipOwnerId",
    20.         shipCbgkfields.put("shipOwnerName", 1.5f);
    21.         shipCbgkfields.put("shipOwnerSex", 1f);
    22.         shipCbgkfields.put("shipOwnerTel", 1f);
    23.         shipCbgkfields.put("shipOwnerIdNumber", 1.1f);
    24.         shipCbgkfields.put("deptId", 1f);
    25.  
    26.         shipCbgkfields.put("createTime", 1f);
    27.         shipCbgkfields.put("bdsTerminalNo", 1.3f);
    28.         shipCbgkfields.put("mmsi", 1.3f);
    29.     }
    30. }

    2.2 检索的DSL语句

    Get       /index/queryShip?keys=琼海口渔&pageNum=1&pageSize=10
    1. GET index_test_search_ship/_search
    2. {
    3.   "from": 0,
    4. 	"size": 20,
    5. 	"query": {
    6. 		"bool": {
    7. 			"must": [{
    8. 				"multi_match": {
    9. 					"query": "琼海口渔",
    10. 					"fields": ["bdsTerminalNo^1.3", "createTime^1.0", "deptId^1.0", "mmsi^1.3", "shipName^2.5", "shipOwnerIdNumber^1.1", "shipOwnerName^1.5", "shipOwnerSex^1.0", "shipOwnerTel^1.0", "shipRegistryPort^1.8"],
    11. 					"type": "cross_fields",
    12. 					"operator": "OR",
    13. 					"analyzer": "ik_max_word",
    14. 					"slop": 0,
    15. 					"prefix_length": 0,
    16. 					"max_expansions": 50,
    17. 					"zero_terms_query": "NONE",
    18. 					"auto_generate_synonyms_phrase_query": true,
    19. 					"fuzzy_transpositions": true,
    20. 					"boost": 1.0
    21. 				}
    22. 			}],
    23. 			"adjust_pure_negative": true,
    24. 			"boost": 1.0
    25. 		}
    26. 	},
    27. 	"track_total_hits": 2147483647,
    28. 	"highlight": {
    29. 		"pre_tags": [""],
    30. 		"post_tags": [""],
    31. 		"number_of_fragments": 0,
    32. 		"type": "plain",
    33. 		"require_field_match": false,
    34. 		"fields": {
    35. 			"shipOwnerName": {},
    36. 			"shipOwnerTel": {},
    37. 			"createTime": {},
    38. 			"mmsi": {},
    39. 			"bdsTerminalNo": {},
    40. 			"deptId": {},
    41. 			"shipName": {},
    42. 			"shipOwnerSex": {},
    43. 			"shipOwnerIdNumber": {},
    44. 			"shipRegistryPort": {}
    45. 		}
    46. 	}
    47. }

    2.3 返回的原始JSON数据

    1. {
    2.   "took" : 4,
    3.   "timed_out" : false,
    4.   "_shards" : {
    5.     "total" : 1,
    6.     "successful" : 1,
    7.     "skipped" : 0,
    8.     "failed" : 0
    9.   },
    10.   "hits" : {
    11.     "total" : {
    12.       "value" : 20,
    13.       "relation" : "eq"
    14.     },
    15.     "max_score" : 7.7624564,
    16.     "hits" : [
    17.       {
    18.         "_index" : "index_test_search_ship",
    19.         "_type" : "_doc",
    20.         "_id" : "bpMhcYQB4gQEvltnaqX-",
    21.         "_score" : 7.7624564,
    22.         "_source" : {
    23.           "shipId" : "01",
    24.           "shipName" : "琼海口渔",
    25.           "shipOwnerName" : "李宁",
    26.           "shipOwnerTel" : "15173934187",
    27.           "shipOwnerIdNumber" : "430525199408136134",
    28.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    29.         },
    30.         "highlight" : {
    31.           "shipName" : [
    32.             "琼海口渔"
    33.           ]
    34.         }
    35.       },
    36.       {
    37.         "_index" : "index_test_search_ship",
    38.         "_type" : "_doc",
    39.         "_id" : "b5MhcYQB4gQEvltnbaUM",
    40.         "_score" : 7.7624564,
    41.         "_source" : {
    42.           "shipId" : "01",
    43.           "shipName" : "琼海口渔",
    44.           "shipOwnerName" : "李宁",
    45.           "shipOwnerTel" : "15173934187",
    46.           "shipOwnerIdNumber" : "430525199408136134",
    47.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    48.         },
    49.         "highlight" : {
    50.           "shipName" : [
    51.             "琼海口渔"
    52.           ]
    53.         }
    54.       },
    55.       {
    56.         "_index" : "index_test_search_ship",
    57.         "_type" : "_doc",
    58.         "_id" : "U5PBb4QB4gQEvltnIKV-",
    59.         "_score" : 7.0790462,
    60.         "_source" : {
    61.           "shipId" : "01",
    62.           "shipName" : "013234琼海口渔",
    63.           "shipOwnerName" : "李宁",
    64.           "shipOwnerTel" : "15173934187",
    65.           "shipOwnerIdNumber" : "430525199408136134",
    66.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    67.         },
    68.         "highlight" : {
    69.           "shipName" : [
    70.             "013234琼海口渔"
    71.           ]
    72.         }
    73.       },
    74.       {
    75.         "_index" : "index_test_search_ship",
    76.         "_type" : "_doc",
    77.         "_id" : "VJPEb4QB4gQEvltnm6Uz",
    78.         "_score" : 7.0790462,
    79.         "_source" : {
    80.           "shipId" : "01",
    81.           "shipName" : "013913琼海口渔",
    82.           "shipOwnerName" : "李宁",
    83.           "shipOwnerTel" : "15173934187",
    84.           "shipOwnerIdNumber" : "430525199408136134",
    85.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    86.         },
    87.         "highlight" : {
    88.           "shipName" : [
    89.             "013913琼海口渔"
    90.           ]
    91.         }
    92.       },
    93.       {
    94.         "_index" : "index_test_search_ship",
    95.         "_type" : "_doc",
    96.         "_id" : "bZMhcYQB4gQEvltnQKVb",
    97.         "_score" : 7.0790462,
    98.         "_source" : {
    99.           "shipId" : "01",
    100.           "shipName" : "琼海口渔013",
    101.           "shipOwnerName" : "",
    102.           "shipOwnerTel" : "15173934187",
    103.           "shipOwnerIdNumber" : "430525199408136134",
    104.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    105.         },
    106.         "highlight" : {
    107.           "shipName" : [
    108.             "琼海口渔013"
    109.           ]
    110.         }
    111.       },
    112.       {
    113.         "_index" : "index_test_search_ship",
    114.         "_type" : "_doc",
    115.         "_id" : "a5MccYQB4gQEvltnY6Ur",
    116.         "_score" : 7.0790462,
    117.         "_source" : {
    118.           "shipId" : "01",
    119.           "shipName" : "琼海口渔013",
    120.           "shipOwnerName" : "李宁",
    121.           "shipOwnerTel" : "15173934187",
    122.           "shipOwnerIdNumber" : "430525199408136134",
    123.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    124.         },
    125.         "highlight" : {
    126.           "shipName" : [
    127.             "琼海口渔013"
    128.           ]
    129.         }
    130.       },
    131.       {
    132.         "_index" : "index_test_search_ship",
    133.         "_type" : "_doc",
    134.         "_id" : "bJMccYQB4gQEvltnZaV1",
    135.         "_score" : 7.0790462,
    136.         "_source" : {
    137.           "shipId" : "01",
    138.           "shipName" : "琼海口渔013",
    139.           "shipOwnerName" : "李宁",
    140.           "shipOwnerTel" : "15173934187",
    141.           "shipOwnerIdNumber" : "430525199408136134",
    142.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    143.         },
    144.         "highlight" : {
    145.           "shipName" : [
    146.             "琼海口渔013"
    147.           ]
    148.         }
    149.       },
    150.       {
    151.         "_index" : "index_test_search_ship",
    152.         "_type" : "_doc",
    153.         "_id" : "VZPbb4QB4gQEvltnraU6",
    154.         "_score" : 6.506234,
    155.         "_source" : {
    156.           "shipId" : "01",
    157.           "shipName" : "013913琼海口渔",
    158.           "shipOwnerName" : "013913琼海口渔",
    159.           "shipOwnerTel" : "15173934187",
    160.           "shipOwnerIdNumber" : "430525199408136134",
    161.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    162.         },
    163.         "highlight" : {
    164.           "shipOwnerName" : [
    165.             "013913琼海口渔"
    166.           ],
    167.           "shipName" : [
    168.             "013913琼海口渔"
    169.           ]
    170.         }
    171.       },
    172.       {
    173.         "_index" : "index_test_search_ship",
    174.         "_type" : "_doc",
    175.         "_id" : "apMWcYQB4gQEvltnT6Vt",
    176.         "_score" : 6.019184,
    177.         "_source" : {
    178.           "shipId" : "01",
    179.           "shipName" : "琼海口渔013 李宁",
    180.           "shipOwnerName" : "12341",
    181.           "shipOwnerTel" : "15173934187",
    182.           "shipOwnerIdNumber" : "430525199408136134",
    183.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    184.         },
    185.         "highlight" : {
    186.           "shipName" : [
    187.             "琼海口渔013 李宁"
    188.           ]
    189.         }
    190.       },
    191.       {
    192.         "_index" : "index_test_search_ship",
    193.         "_type" : "_doc",
    194.         "_id" : "cpNRcYQB4gQEvltnQ6Xw",
    195.         "_score" : 6.019184,
    196.         "_source" : {
    197.           "shipId" : "01",
    198.           "shipName" : "琼海口渔013 李宁",
    199.           "shipOwnerName" : "李宁",
    200.           "shipOwnerTel" : "15173934187",
    201.           "shipOwnerIdNumber" : "430525199408136134",
    202.           "fullText" : "01 解决12345 时代 15173934187 430525199408136134"
    203.         },
    204.         "highlight" : {
    205.           "shipName" : [
    206.             "琼海口渔013 李宁"
    207.           ]
    208.         }
    209.       }
    210.     ]
    211.   }
    212. }

    2.4 接收格式化后返回的接口数据

    1. {
    2.     "code": "SUCCESS",
    3.     "businessCode": "0",
    4.     "message": "操作成功",
    5.     "data": {
    6.         "total": 20,
    7.         "searchShips": [
    8.             {
    9.                 "shipId": "01",
    10.                 "shipName": "琼海口渔",
    11.                 "shipRegistryPort": null,
    12.                 "shipOwnerId": null,
    13.                 "shipOwnerName": "李宁",
    14.                 "shipOwnerSex": null,
    15.                 "shipOwnerTel": "15173934187",
    16.                 "shipOwnerIdNumber": "430525199408136134",
    17.                 "deptId": null,
    18.                 "createTime": null,
    19.                 "bdsTerminalNo": null,
    20.                 "mmsi": null
    21.             },
    22.             {
    23.                 "shipId": "01",
    24.                 "shipName": "琼海口渔",
    25.                 "shipRegistryPort": null,
    26.                 "shipOwnerId": null,
    27.                 "shipOwnerName": "李宁",
    28.                 "shipOwnerSex": null,
    29.                 "shipOwnerTel": "15173934187",
    30.                 "shipOwnerIdNumber": "430525199408136134",
    31.                 "deptId": null,
    32.                 "createTime": null,
    33.                 "bdsTerminalNo": null,
    34.                 "mmsi": null
    35.             },
    36.             {
    37.                 "shipId": "01",
    38.                 "shipName": "013234琼海口渔",
    39.                 "shipRegistryPort": null,
    40.                 "shipOwnerId": null,
    41.                 "shipOwnerName": "李宁",
    42.                 "shipOwnerSex": null,
    43.                 "shipOwnerTel": "15173934187",
    44.                 "shipOwnerIdNumber": "430525199408136134",
    45.                 "deptId": null,
    46.                 "createTime": null,
    47.                 "bdsTerminalNo": null,
    48.                 "mmsi": null
    49.             },
    50.             {
    51.                 "shipId": "01",
    52.                 "shipName": "013913琼海口渔",
    53.                 "shipRegistryPort": null,
    54.                 "shipOwnerId": null,
    55.                 "shipOwnerName": "李宁",
    56.                 "shipOwnerSex": null,
    57.                 "shipOwnerTel": "15173934187",
    58.                 "shipOwnerIdNumber": "430525199408136134",
    59.                 "deptId": null,
    60.                 "createTime": null,
    61.                 "bdsTerminalNo": null,
    62.                 "mmsi": null
    63.             },
    64.             {
    65.                 "shipId": "01",
    66.                 "shipName": "琼海口渔013",
    67.                 "shipRegistryPort": null,
    68.                 "shipOwnerId": null,
    69.                 "shipOwnerName": "",
    70.                 "shipOwnerSex": null,
    71.                 "shipOwnerTel": "15173934187",
    72.                 "shipOwnerIdNumber": "430525199408136134",
    73.                 "deptId": null,
    74.                 "createTime": null,
    75.                 "bdsTerminalNo": null,
    76.                 "mmsi": null
    77.             },
    78.             {
    79.                 "shipId": "01",
    80.                 "shipName": "琼海口渔013",
    81.                 "shipRegistryPort": null,
    82.                 "shipOwnerId": null,
    83.                 "shipOwnerName": "李宁",
    84.                 "shipOwnerSex": null,
    85.                 "shipOwnerTel": "15173934187",
    86.                 "shipOwnerIdNumber": "430525199408136134",
    87.                 "deptId": null,
    88.                 "createTime": null,
    89.                 "bdsTerminalNo": null,
    90.                 "mmsi": null
    91.             },
    92.             {
    93.                 "shipId": "01",
    94.                 "shipName": "琼海口渔013",
    95.                 "shipRegistryPort": null,
    96.                 "shipOwnerId": null,
    97.                 "shipOwnerName": "李宁",
    98.                 "shipOwnerSex": null,
    99.                 "shipOwnerTel": "15173934187",
    100.                 "shipOwnerIdNumber": "430525199408136134",
    101.                 "deptId": null,
    102.                 "createTime": null,
    103.                 "bdsTerminalNo": null,
    104.                 "mmsi": null
    105.             },
    106.             {
    107.                 "shipId": "01",
    108.                 "shipName": "013913琼海口渔",
    109.                 "shipRegistryPort": null,
    110.                 "shipOwnerId": null,
    111.                 "shipOwnerName": "013913琼海口渔",
    112.                 "shipOwnerSex": null,
    113.                 "shipOwnerTel": "15173934187",
    114.                 "shipOwnerIdNumber": "430525199408136134",
    115.                 "deptId": null,
    116.                 "createTime": null,
    117.                 "bdsTerminalNo": null,
    118.                 "mmsi": null
    119.             },
    120.             {
    121.                 "shipId": "01",
    122.                 "shipName": "琼海口渔013 李宁",
    123.                 "shipRegistryPort": null,
    124.                 "shipOwnerId": null,
    125.                 "shipOwnerName": "12341",
    126.                 "shipOwnerSex": null,
    127.                 "shipOwnerTel": "15173934187",
    128.                 "shipOwnerIdNumber": "430525199408136134",
    129.                 "deptId": null,
    130.                 "createTime": null,
    131.                 "bdsTerminalNo": null,
    132.                 "mmsi": null
    133.             },
    134.             {
    135.                 "shipId": "01",
    136.                 "shipName": "琼海口渔013 李宁",
    137.                 "shipRegistryPort": null,
    138.                 "shipOwnerId": null,
    139.                 "shipOwnerName": "李宁",
    140.                 "shipOwnerSex": null,
    141.                 "shipOwnerTel": "15173934187",
    142.                 "shipOwnerIdNumber": "430525199408136134",
    143.                 "deptId": null,
    144.                 "createTime": null,
    145.                 "bdsTerminalNo": null,
    146.                 "mmsi": null
    147.             }
    148.         ]
    149.     }
    150. }

    可以看出，返回的字段，凡是命中关键词分词其中一个的都做高亮处理了。

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  • 原文地址：https://blog.csdn.net/linhaiyun_ytdx/article/details/127955266