@[TOC]

摘要

所谓自动补全功能就是“百度搜索框”中每敲下一个字符下面的提示框就会动态改变提示的功能，就是下面的效果：↓

==说明：使用RestHighLevelClient 即可实现输入框补全功能==

• springboot代码
• kibana代码

springboot代码

依赖

<!--ES-->
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>6.8.12</version>
    <exclusions>
        <exclusion>
            <artifactId>elasticsearch</artifactId>
            <groupId>org.elasticsearch</groupId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>6.8.12</version>
</dependency>

代码

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.Fuzziness;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.FieldSortBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.elasticsearch.search.suggest.Suggest;
import org.elasticsearch.search.suggest.SuggestBuilder;
import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;

@Autowired
private RestHighLevelClient client;
public static final int NINE = 9;
public static final int TEN = 10;

/**
     *  输入框自动补全提示功能（ElasticSearch使用completion实现补全功能）
     * @param request request
     * @param suggestValue 输入参数
     * @author liudz
     * @date 2021/4/19
     * @return 执行结果
     **/
    @GetMapping(value = "/completion")
    public Response<List<String>> getSuggestCompletion(@RequestParam String suggestValue, HttpServletRequest request) {
   
        log.info("--getSearchSuggest--begin--");
        Long userId = Long.valueOf(request.getUserPrincipal().getName());
        //指定在哪个字段搜索
        String suggestField = "region";

        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //suggestField为指定在哪个字段搜索，suggestValue为输入内容，TEN为10，代表输出显示最大条数
        CompletionSuggestionBuilder suggestionBuilderDistrict =
                new CompletionSuggestionBuilder(suggestField).prefix(suggestValue).size(TEN);
        SuggestBuilder suggestBuilder = new SuggestBuilder();
        suggestBuilder.addSuggestion("my_suggest", suggestionBuilderDistrict);
        searchSourceBuilder.suggest(suggestBuilder);
        SearchRequest searchRequest = new SearchRequest(userId + esIndex);
        searchRequest.types(esType);
        searchRequest.source(searchSourceBuilder);
        SearchResponse response = null;
        try {
   
            response = client.search(searchRequest, RequestOptions.DEFAULT);
        } catch (IOException e) {
   
            log.error("IOException:{}", e);
        }
        Suggest suggest = response.getSuggest();

        List<String> keywords = null;
        if (suggest != null) {
   
            keywords = new ArrayList<>();
            List<? extends Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option>> entries =
                    suggest.getSuggestion("my_suggest").getEntries();
            for (Suggest.Suggestion.Entry<? extends Suggest.Suggestion.Entry.Option> entry: entries) {
   
                for (Suggest.Suggestion.Entry.Option option: entry.getOptions()) {
   
                    String keyword = option.getText().string();
                    if (!StringUtils.isEmpty(keyword)) {
   
                        if (keywords.contains(keyword)) {
   
                            continue;
                        }
                        keywords.add(keyword);
                        if (keywords.size() >= NINE) {
   
                            break;
                        }
                    }
                }
            }
        }
        return Response.success(keywords);
    }

kibana代码

第一部分：设置index、type、mapping

==说明：设置某个字段"type": "completion"即可==

PUT 12_assets_directory_v1/
{
   
  "index_patterns": "test-logs-*",
  "settings": {
   
        "number_of_shards": 5,
        "number_of_replicas": 1,
        "analysis": {
   
      "analyzer": {
   
        "my_analyzer": {
   
          "type": "pattern",
          "pattern":["_","-"]
        }
      }
    }
    },
  "mappings": {
   
    "_doc":{
   
      "properties": {
   
                "file_name": {
   
                    "type": "text",
                    "copy_to": "region"
                },
                "file_type": {
   
                  "type": "keyword"
                },
                "database_name": {
   
                    "type": "text",
                    "analyzer": "ik_max_word",
                    "copy_to": "region"
                },
                "table_name": {
   
                    "type": "text",
                    "analyzer": "ik_max_word",
                    "copy_to": "region"
                },
                "include_fields": {
   
                    "type": "text",
                    "index": false
                },
                "source_business": {
   
                    "type": "integer",
                    "index": false
                },
                "store_type": {
   
                    "type": "text",
                    "index": false
                },
                "whether_online": {
   
                    "type": "byte",
                    "index": false
                },
                "foreign_id": {
   
                    "type": "integer",
                    "index": false
                },
                "update_time": {
   
                    "type": "long",
                    "index": false
                },
                "region": {
   
                      "type": "completion",
                      "analyzer": "ik_max_word"
      }
            }
    }
  }
}

第二部分：批量插入

==批量插入每个json必须单独存在一行==

POST _bulk/?refresh=true
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "Lucene is cool","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 10,"update_time": 1618560193000}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "Lucene用户文件","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 11,"update_time": 1618560193010}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "103-is-cool","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 12,"update_time": 1618560193040}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "103_is_cool","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 20,"update_time": 1618560193120}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "103 is cool","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 17,"update_time": 1618560193070}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "test001","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 18,"update_time": 1618560193080}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "test002 ldz","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 19,"update_time": 1618560193090}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "美丽心之所想","file_type": "file","database_name": "","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 13,"update_time": 1618560193050}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "魅力","file_type": "file","database_name": "美好","table_name": "","include_fields": "","source_business": 1,"store_type": "hdfs","whether_online": 0,"foreign_id": 14,"update_time": 1618560193060}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "","file_type": "table","database_name": "geespace_bd_platform_dev","table_name": "12_mysql-1","include_fields": "","source_business": 1,"store_type": "mysql","whether_online": 0,"foreign_id": 10,"update_time": 1618560193020}
{
    "index" : {
    "_index" : "12_assets_directory_v1","_type" : "_doc" }}
{
    "file_name": "","file_type": "table","database_name": "geespace_bd_platform_dev","table_name": "103_addserialnumber_2","include_fields": "","source_business": 1,"store_type": "mysql","whether_online": 0,"foreign_id": 11,"update_time": 1618560193030}

第三部分：执行

==“song-suggest”为自定义的别名，“field”为要查询的字段==

POST 12_assets_directory_v1/_search?pretty
{
   
  "suggest": {
   
    "song-suggest": {
   
      "prefix": "g",
      "completion": {
   
        "field": "region"
      }
    }
  }
}

第四部分：结果展示

==返回json中options集合中的text即为补全提示的内容==

{
   
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
   
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
   
    "total" : 0,
    "max_score" : 0.0,
    "hits" : [ ]
  },
  "suggest" : {
   
    "song-suggest" : [
      {
   
        "text" : "g",
        "offset" : 0,
        "length" : 1,
        "options" : [
          {
   
            "text" : "geespace_bd_platform_dev",
            "_index" : "12_assets_directory_v1",
            "_type" : "_doc",
            "_id" : "jIkR6HgBdsS-EtqKoYwv",
            "_score" : 1.0,
            "_ignored" : [
              "region"
            ],
            "_source" : {
   
              "file_name" : "",
              "file_type" : "table",
              "database_name" : "geespace_bd_platform_dev",
              "table_name" : "12_mysql-1",
              "include_fields" : "",
              "source_business" : 1,
              "store_type" : "mysql",
              "whether_online" : 0,
              "foreign_id" : 10,
              "update_time" : 1618560193020
            }
          },
          {
   
            "text" : "geespace_bd_platform_dev",
            "_index" : "12_assets_directory_v1",
            "_type" : "_doc",
            "_id" : "jYkR6HgBdsS-EtqKoYwv",
            "_score" : 1.0,
            "_ignored" : [
              "region"
            ],
            "_source" : {
   
              "file_name" : "",
              "file_type" : "table",
              "database_name" : "geespace_bd_platform_dev",
              "table_name" : "103_addserialnumber_2",
              "include_fields" : "",
              "source_business" : 1,
              "store_type" : "mysql",
              "whether_online" : 0,
              "foreign_id" : 11,
              "update_time" : 1618560193030
            }
          }
        ]
      }
    ]
  }
}

本人先关其他文章链接

1.ElasticSearch7.6.x 模板及滚动索引创建及注意事项
https://blog.csdn.net/a924382407/article/details/115082265

2.ElasticSearch的IK分词器
https://blog.csdn.net/a924382407/article/details/117255506

3.ElasticSearch核心概念：倒排索引
https://blog.csdn.net/a924382407/article/details/117255449

4.springboot集成ElasticSearch使用completion实现补全功能
https://blog.csdn.net/a924382407/article/details/115868167

5.ES Restful API讲解使用
https://blog.csdn.net/a924382407/article/details/115085022

6.ES API，使用Kibana的开发工具用例说明
https://blog.csdn.net/a924382407/article/details/115084549