這篇文章主要講解了“SpringBoot如何整合ES解析搜索返回字段問題”，文中的講解內(nèi)容簡單清晰，易于學(xué)習(xí)與理解，下面請大家跟著小編的思路慢慢深入，一起來研究和學(xué)習(xí)“SpringBoot如何整合ES解析搜索返回字段問題”吧！
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索引2個文檔到 hotel 索引中：
重慶分公司
重慶分公司
PUT /hotel/_doc/1
{
"title": "文雅酒店",
"city": "青島",
"price": 556,
"create_time": "20200418120000",
"amenities": "浴池,普通停車場/充電停車場",
"full_room": false,
"location": {
"lat": 36.083078,
"lon": 120.37566
},
"praise": 10
}
PUT /hotel/_doc/2
{
"title": "金都嘉怡假日酒店",
"city": "北京",
"price": 337,
"create_time": "20210315200000",
"amenities": "wifi,充電停車場/可升降停車場",
"full_room": false,
"location": {
"lat": 39.915153,
"lon": 116.403
},
"praise": 60
}
PUT /hotel/_doc/1
{
"title": "文雅酒店",
"city": "青島",
"price": 556,
"create_time": "20200418120000",
"amenities": "浴池,普通停車場/充電停車場",
"full_room": false,
"location": {
"lat": 36.083078,
"lon": 120.37566
},
"praise": 10
}
PUT /hotel/_doc/2
{
"title": "金都嘉怡假日酒店",
"city": "北京",
"price": 337,
"create_time": "20210315200000",
"amenities": "wifi,充電停車場/可升降停車場",
"full_room": false,
"location": {
"lat": 39.915153,
"lon": 116.403
},
"praise": 60
}GET /hotel/_search
{
"took" : 499,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "hotel",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"title" : "金都嘉怡假日酒店",
"city" : "北京",
"price" : 337,
"create_time" : "20210315200000",
"amenities" : "wifi,充電停車場/可升降停車場",
"full_room" : false,
"location" : {
"lat" : 39.915153,
"lon" : 116.403
},
"praise" : 60
}
},
{
"_index" : "hotel",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"title" : "文雅酒店",
"city" : "青島",
"price" : 556,
"create_time" : "20200418120000",
"amenities" : "浴池,普通停車場/充電停車場",
"full_room" : false,
"location" : {
"lat" : 36.083078,
"lon" : 120.37566
},
"praise" : 10
}
}
]
}
}took 值告訴我們執(zhí)行整個搜索請求耗費了多少毫秒。
_shards 部分告訴我們在查詢中參與分片的總數(shù)，以及這些分片成功了多少個失敗了多少個。正常情況下我們不希望分片失敗，但是分片失敗是可能發(fā)生的。如果我們遭遇到一種災(zāi)難級別的故障，在這個故障中丟失了相同分片的原始數(shù)據(jù)和副本，那么對這個分片將沒有可用副本來對搜索請求作出響應(yīng)。假若這樣，Elasticsearch 將報告這個分片是失敗的，但是會繼續(xù)返回剩余分片的結(jié)果。
timed_out 值告訴我們查詢是否超時。默認(rèn)情況下，搜索請求不會超時。
返回結(jié)果中最重要的部分是 hits ，它包含 total 字段來表示匹配到的文檔總數(shù)，并且一個 hits 數(shù)組包含所查詢結(jié)果的前十個文檔。在解析搜索結(jié)果時，我們通常需要關(guān)注以下幾個字段：
hits.total.value：匹配的文檔總數(shù)。
hits.max_score：與查詢所匹配文檔的_score的最大值。
hits.hits：匹配的文檔列表。
hits.hits._source：匹配的文檔的原始數(shù)據(jù)。
hits.hits._score：匹配的文檔的分?jǐn)?shù)。它衡量了文檔與查詢的匹配程度,默認(rèn)情況下，首先返回最相關(guān)的文檔結(jié)果，就是說，返回的文檔是按照score 降序排列的。
hits.hits.highlight：匹配的文檔的高亮顯示信息。
@Slf4j
@Service
public class ElasticSearchImpl {
@Autowired
private RestHighLevelClient restHighLevelClient;
public void searchUser() throws IOException {
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
SearchRequest searchRequest = new SearchRequest(new String[]{"hotel"},searchSourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
TimeValue took = searchResponse.getTook();
System.out.println("took = " + took);
// 搜索結(jié)果
SearchHits searchHits = searchResponse.getHits();
// hits.total.value:匹配的文檔總數(shù)
TotalHits totalHits = searchHits.getTotalHits();
long value = totalHits.value;
System.out.println("value = " + value);
// hits.max_score:與查詢所匹配文檔的_score的最大值
float maxScore = searchHits.getMaxScore();
System.out.println("maxScore = " + maxScore);
// hits.hits:匹配的文檔列表
SearchHit[] hits = searchHits.getHits();
for (SearchHit hit : hits) {
// hits.hits._source：匹配的文檔的原始數(shù)據(jù)
String sourceAsString = hit.getSourceAsString();
System.out.println("sourceAsString = " + sourceAsString);
// hits.hits._id：匹配的文檔的id
String id = hit.getId();
System.out.println("id = " + id);
Map fields = hit.getFields();
System.out.println("fields = " + fields);
String index = hit.getIndex();
System.out.println("index = " + index);
float score = hit.getScore();
System.out.println("score = " + score);
}
System.out.println(searchResponse);
}
}
@Slf4j
@Service
public class ElasticSearchImpl {
@Autowired
private RestHighLevelClient restHighLevelClient;
public void searchUser() throws IOException {
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
SearchRequest searchRequest = new SearchRequest(new String[]{"hotel"},searchSourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
TimeValue took = searchResponse.getTook();
System.out.println("took = " + took);
// 搜索結(jié)果
SearchHits searchHits = searchResponse.getHits();
// hits.total.value:匹配的文檔總數(shù)
TotalHits totalHits = searchHits.getTotalHits();
long value = totalHits.value;
System.out.println("value = " + value);
// hits.max_score:與查詢所匹配文檔的_score的最大值
float maxScore = searchHits.getMaxScore();
System.out.println("maxScore = " + maxScore);
// hits.hits:匹配的文檔列表
SearchHit[] hits = searchHits.getHits();
for (SearchHit hit : hits) {
// hits.hits._source：匹配的文檔的原始數(shù)據(jù)
String sourceAsString = hit.getSourceAsString();
System.out.println("sourceAsString = " + sourceAsString);
// hits.hits._id：匹配的文檔的id
String id = hit.getId();
System.out.println("id = " + id);
Map fields = hit.getFields();
System.out.println("fields = " + fields);
String index = hit.getIndex();
System.out.println("index = " + index);
float score = hit.getScore();
System.out.println("score = " + score);
}
System.out.println(searchResponse);
}
} took=2ms
value = 2
maxScore = 1.0
sourceAsString = {"title":"金都嘉怡假日酒店","city":"北京","price":337,"create_time":"20210315200000","amenities":"wifi,充電停車場/可升降停車場","full_room":false,"location":{"lat":39.915153,"lon":116.403},"praise":60}
id = 2
fields = {}
index = hotel
score = 1.0
sourceAsString = {"title":"文雅酒店","city":"青島","price":556,"create_time":"20200418120000","amenities":"浴池,普通停車場/充電停車場","full_room":false,"location":{"lat":36.083078,"lon":120.37566},"praise":10}
id = 1
fields = {}
index = hotel
score = 1.0{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 2,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "hotel",
"_type": "_doc",
"_id": "2",
"_score": 1.0,
"_source": {
"title": "金都嘉怡假日酒店",
"city": "北京",
"price": 337,
"create_time": "20210315200000",
"amenities": "wifi,充電停車場/可升降停車場",
"full_room": false,
"location": {
"lat": 39.915153,
"lon": 116.403
},
"praise": 60
}
},
{
"_index": "hotel",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"title": "文雅酒店",
"city": "青島",
"price": 556,
"create_time": "20200418120000",
"amenities": "浴池,普通停車場/充電停車場",
"full_room": false,
"location": {
"lat": 36.083078,
"lon": 120.37566
},
"praise": 10
}
}
]
}
}1. ElasticSearch 搜索結(jié)果中的 _score 字段是什么意思？
答：_score 字段表示匹配文檔的相關(guān)度得分，分?jǐn)?shù)越高表示匹配度越高。
2. ElasticSearch 搜索結(jié)果中的 highlight 字段是什么意思？
答：highlight 字段表示匹配文檔中被高亮顯示的字段及其高亮顯示的內(nèi)容。
3. 如何獲取 ElasticSearch 搜索結(jié)果中的總文檔數(shù)？
答：可以通過 hits.total.value 字段獲取匹配的文檔總數(shù)。
4. 如何獲取 ElasticSearch 搜索結(jié)果中的匹配文檔列表？
答：可以通過 hits.hits 字段獲取匹配的文檔列表。
5. 如何獲取 ElasticSearch 搜索結(jié)果中匹配文檔的原始數(shù)據(jù)？
答：可以通過 hits.hits._source 字段獲取匹配文檔的原始數(shù)據(jù)。
6. 如何獲取 ElasticSearch 搜索結(jié)果中匹配文檔的高亮顯示信息？
答：可以通過 hits.hits.highlight 字段獲取匹配文檔的高亮顯示信息。
7. ElasticSearch 搜索結(jié)果中的 _shards 字段是什么意思？
答：_shards 字段表示搜索涉及的分片信息，包括總分片數(shù)、成功的分片數(shù)、跳過的分片數(shù)和失敗的分片數(shù)。
8. ElasticSearch 搜索結(jié)果中的 took 字段是什么意思？
答：took 字段表示搜索耗時，單位為毫秒。
感謝各位的閱讀，以上就是“SpringBoot如何整合ES解析搜索返回字段問題”的內(nèi)容了，經(jīng)過本文的學(xué)習(xí)后，相信大家對SpringBoot如何整合ES解析搜索返回字段問題這一問題有了更深刻的體會，具體使用情況還需要大家實踐驗證。這里是創(chuàng)新互聯(lián)，小編將為大家推送更多相關(guān)知識點的文章，歡迎關(guān)注！
