ElasticSearch 实现分词全文检索

数据准备

ElasticSearch的各种查询

不会对查询关键字进行分词

term 查询

term的查询是代表完全匹配，搜索之前不会对你搜索的关键字进行分词，对你的关键字去文档分词库中的去匹配内容

# term 查询 -- 完整匹配

POST /sms-logs-index/_search

{

  "from":0,

  "size":5,  //获取5条，类似分页

  "query":{

    "term": {

      "province": {

        "value": "江苏"

      }

    }

  }

}

返回值

{

  "took" : 1,  //执行花了ms

  "timed_out" : false, //没有超时

  "_shards" : {

    "total" : 1,  //总共多少分片

    "successful" : 1, //成功了多少分片

    "skipped" : 0,

    "failed" : 0

  },

  "hits" : {  //hits 中是我们要看的数据

    "total" : {

      "value" : 10,  //一共查了N条

      "relation" : "eq"

    },

    "max_score" : 0.046520013,  //匹配程度，匹配度越高，分数越高

    "hits" : [

      {

        "_index" : "sms-logs-index",

        "_type" : "_doc",

        "_id" : "Q5XEloYBGlLaT58Lnwjj",

        "_score" : 0.046520013,

        "_source" : {  //完成内容

          "corpName" : "corpName1",

          "createDate" : "2023-02-28 14:45:14",

          "fee" : 47,

          "ipAddr" : "172.16.0.66",

          "longCode" : "张三1",

          "mobile" : "13845591752",

          "operatorld" : 1,

          "province" : "江苏",

          "sendDate" : "2023-02-28 14:43:14",

          "smsContent" : "【阿里云】尊敬的vipsoft：您有2台云服务器ECS配置升级成功。如有CPU、内存变更或0Mbps带宽升级，您需要在ECS控制台手动重启云服务器后才能生效。",

          "state" : 1

        }

      },

SpringBoot 代码term查询

@Test

void termQuery() throws Exception{

    String indexName = "sms-logs-index";

    RestHighLevelClient client = ESClient.getClient();

    //1. 创建Request对象

    SearchRequest request = new SearchRequest(indexName);

    //2. 指定查询条件

    SearchSourceBuilder builder = new SearchSourceBuilder();

    builder.from(0);

    builder.size(5);

    builder.query(QueryBuilders.termQuery("province","江苏"));

    request.source(builder);

    //3. 执行查询

    SearchResponse resp = client.search(request, RequestOptions.DEFAULT);

    //4. 获取到 _source 中的数据，并展示

    for (SearchHit hit : resp.getHits().getHits()) {

        Map<String, Object> result = hit.getSourceAsMap();

        System.out.println(result);

    }

}

terms 查询

terms和term的查询机制是一样，都不会将指定的查询关键字进行分词，直接去分词库中匹配，找到相应文档内容。

terms是在针对一个字段包含多个值的时候使用。

term: where province = 江苏

terms: where province = 江苏 or province = ? or province = ?

Restful

# terms 查询

POST /sms-logs-index/_search

{

  "query":{

    "terms": {

      "province": [

        "江苏",

        "上海"

      ]

    }

  }

}

Java

@Test

void termsQuery() throws Exception{

    String indexName = "sms-logs-index";

    RestHighLevelClient client = ESClient.getClient();

    //1. 创建Request对象

    SearchRequest request = new SearchRequest(indexName);

    //2. 指定查询条件

    SearchSourceBuilder builder = new SearchSourceBuilder();

    builder.query(QueryBuilders.termsQuery("province","江苏","上海"));

    request.source(builder);

    //3. 执行查询

    SearchResponse resp = client.search(request, RequestOptions.DEFAULT);

    //4. 获取到 _source 中的数据，并展示

    for (SearchHit hit : resp.getHits().getHits()) {

        Map<String, Object> result = hit.getSourceAsMap();

        System.out.println(result);

    }

}

在线ik分词器：https://www.sojson.com/analyzer

巴特西

ElasticSearch 实现分词全文检索 - term、terms查询

数据准备

ElasticSearch的各种查询

term 查询

terms 查询

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