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ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

1、資料準備

首先建立book索引

PUT /book/
{
  "settings": {
    "number_of_shards": 1,
    "number_of_replicas": 0
  },
  "mappings": {
    "properties": {
      "name": {
        "type": "text",
        "analyzer": "ik_max_word",
        "search_analyzer": "ik_smart"
      },
      "description": {
        "type": "text",
        "analyzer": "ik_max_word",
        "search_analyzer": "ik_smart"
      },
      "studymodel": {
        "type": "keyword"
      },
      "price": {
        "type": "double"
      },
      "timestamp": {
        "type": "date",
        "format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
      },
      "pic": {
        "type": "text",
        "index": false
      }
    }
  }
}

添加測試資料

PUT /book/_doc/1
{
  "name": "Bootstrap開發",
  "description": "Bootstrap是一個非常流行的開發架構。此開發架構可以幫助不擅長css頁面開發的程式人員輕松的實作一個css，不受浏覽器限制的精美界面css效果。",
  "studymodel": "201002",
  "price": 38.6,
  "timestamp": "2019-08-25 19:11:35",
  "pic": "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
  "tags": [
    "bootstrap",
    "dev"
  ]
}

PUT /book/_doc/2
{
  "name": "java程式設計思想",
  "description": "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
  "studymodel": "201001",
  "price": 68.6,
  "timestamp": "2019-08-25 19:11:35",
  "pic": "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
  "tags": [
    "java",
    "dev"
  ]
}

PUT /book/_doc/3
{
  "name": "spring開發基礎",
  "description": "spring 在java領域非常流行，java程式員都在用。",
  "studymodel": "201001",
  "price": 88.6,
  "timestamp": "2019-08-24 19:11:35",
  "pic": "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
  "tags": [
    "spring",
    "java"
  ]
}

2、match_all搜尋

match_all用來搜尋全部記錄，先回顧下文法

GET /book/_search
{
  "query": {
    "match_all": {}
  }
}

傳回

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "Bootstrap開發",
          "description" : "Bootstrap是一個非常流行的開發架構。此開發架構可以幫助不擅長css頁面開發的程式人員輕松的實作一個css，不受浏覽器限制的精美界面css效果。",
          "studymodel" : "201002",
          "price" : 38.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "bootstrap",
            "dev"
          ]
        }
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.0,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        }
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.0,
        "_source" : {
          "name" : "spring開發基礎",
          "description" : "spring 在java領域非常流行，java程式員都在用。",
          "studymodel" : "201001",
          "price" : 88.6,
          "timestamp" : "2019-08-24 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "spring",
            "java"
          ]
        }
      }
    ]
  }
}

Java代碼

@Test
    public void testSearchAll() throws IOException {

        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.matchAllQuery());

        //擷取某些字段
//        searchSourceBuilder.fetchSource(new String[]{"name"}, new String[]{});

        searchRequest.source(searchSourceBuilder);

        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

        //3擷取結果
        SearchHits hits = searchResponse.getHits();

        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {

            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");

        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

3、IDs搜尋

IDs用來搜尋指定id的記錄，先回顧下文法

GET /book/_search
{
  "query": {
    "ids": {
      "values": [1,4,100]
    }
  }
}

隻有id為1才存在資料，id為4，id為100均無資料

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "Bootstrap開發",
          "description" : "Bootstrap是一個非常流行的開發架構。此開發架構可以幫助不擅長css頁面開發的程式人員輕松的實作一個css，不受浏覽器限制的精美界面css效果。",
          "studymodel" : "201002",
          "price" : 38.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "bootstrap",
            "dev"
          ]
        }
      }
    ]
  }
}

Java代碼

//ids搜尋
    @Test
    public void testSearchIds() throws IOException {

        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.idsQuery().addIds("1","4","100"));

        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();

        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

4、match搜尋

match就是普通的分詞搜尋，先回顧下文法

GET /book/_search
{
  "query": {
    "match": {
      "description": "java程式員"
    }
  }
}

傳回結果

{
  "took" : 88,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.9788694,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.9788694,
        "_source" : {
          "name" : "spring開發基礎",
          "description" : "spring 在java領域非常流行，java程式員都在用。",
          "studymodel" : "201001",
          "price" : 88.6,
          "timestamp" : "2019-08-24 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "spring",
            "java"
          ]
        }
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 0.51124346,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        }
      }
    ]
  }
}

Java代碼

//match搜尋  普通搜尋
    @Test
    public void testSearchMatch() throws IOException {

        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.matchQuery("description", "java程式員"));
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

5、term搜尋

不會對搜尋關鍵詞進行分詞，代表精确比對

GET /book/_search
{
  "query": {
    "term": {
      "description": "java程式員"
    }
  }
}

無結果傳回，原因description已被分詞，無

java程式員

這個單獨詞彙

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 0,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  }
}

Java代碼

//term 搜尋
    @Test
    public void testSearchTerm() throws IOException {
        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.termQuery("description", "java程式員"));
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

同樣無傳回結果。

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

6、multi_match多字段搜尋

同時比對多個字段進行搜尋，先回顧下文法

GET /book/_search
{
  "query": {
    "multi_match": {
      "query": "java程式員",
      "fields": [
        "name",
        "description"
      ]
    }
  }
}

将

name

，

description

中包含關鍵詞的結果傳回

{
  "took" : 54,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.9788694,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.9788694,
        "_source" : {
          "name" : "spring開發基礎",
          "description" : "spring 在java領域非常流行，java程式員都在用。",
          "studymodel" : "201001",
          "price" : 88.6,
          "timestamp" : "2019-08-24 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "spring",
            "java"
          ]
        }
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 0.9331132,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        }
      }
    ]
  }
}

Java代碼

//multi_match搜尋  多字段搜尋
    @Test
    public void testSearchMultiMatch() throws IOException {
        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.multiMatchQuery("java程式員","name","description"));
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

7、bool搜尋

bool搜尋類似于資料庫中的and or關鍵詞，先回顧下文法，搜尋

name

、

description

必須包含java程式員，或者

studymodel

包含201001的資料

GET /book/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "multi_match": {
            "query": "java程式員",
            "fields": [
              "name",
              "description"
            ]
          }
        }
      ],
      "should": [
        {
          "match": {
            "studymodel": "201001"
          }
        }
      ]
    }
  }
}

傳回結果

{
  "took" : 50,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 2.448873,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 2.448873,
        "_source" : {
          "name" : "spring開發基礎",
          "description" : "spring 在java領域非常流行，java程式員都在用。",
          "studymodel" : "201001",
          "price" : 88.6,
          "timestamp" : "2019-08-24 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "spring",
            "java"
          ]
        }
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.4031168,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        }
      }
    ]
  }
}

Java代碼

//bool搜尋
    @Test
    public void testSearchBool() throws IOException {
        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //建構multiMatch請求
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery("java程式員", "name", "description");
        //建構match請求
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("studymodel", "201001");
        BoolQueryBuilder boolQueryBuilder=QueryBuilders.boolQuery();
        boolQueryBuilder.must(multiMatchQueryBuilder);
        boolQueryBuilder.should(matchQueryBuilder);
        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

8、filter過濾

對搜尋進行過濾，注意與

query

進行差別，先回顧下文法，搜尋

name

、

description

必須包含java程式員，或者

studymodel

包含201001，

price

在50至70範圍内

GET /book/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "multi_match": {
            "query": "java程式員",
            "fields": [
              "name",
              "description"
            ]
          }
        }
      ],
      "should": [
        {
          "match": {
            "studymodel": "201001"
          }
        }
      ],
      "filter": {
        "range": {
          "price": {
            "gte": 50,
            "lte": 70
          }
        }
      }
    }
  }
}

傳回結果

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.4031168,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.4031168,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        }
      }
    ]
  }
}

Java代碼

//filter搜尋
    @Test
    public void testSearchFilter() throws IOException {
        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //建構multiMatch請求
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery("java程式員", "name", "description");
        //建構match請求
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("studymodel", "201001");
        BoolQueryBuilder boolQueryBuilder=QueryBuilders.boolQuery();
        boolQueryBuilder.must(multiMatchQueryBuilder);
        boolQueryBuilder.should(matchQueryBuilder);
        boolQueryBuilder.filter(QueryBuilders.rangeQuery("price").gte(50).lte(70));
        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

9、sort排序

對搜尋進行排序，注意與

query

進行差別，先回顧下文法，搜尋

name

、

description

必須包含java程式員，或者

studymodel

包含201001，

price

在50至90範圍内，按照

price

升序

GET /book/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "multi_match": {
            "query": "java程式員",
            "fields": [
              "name",
              "description"
            ]
          }
        }
      ],
      "should": [
        {
          "match": {
            "studymodel": "201001"
          }
        }
      ],
      "filter": {
        "range": {
          "price": {
            "gte": 50,
            "lte": 90
          }
        }
      }
    }
  },
  "sort": [
    {
      "price": {
        "order": "asc"
      }
    }
  ]
}

傳回結果

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "java程式設計思想",
          "description" : "java語言是世界第一程式設計語言，在軟體開發領域使用人數最多。",
          "studymodel" : "201001",
          "price" : 68.6,
          "timestamp" : "2019-08-25 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "java",
            "dev"
          ]
        },
        "sort" : [
          68.6
        ]
      },
      {
        "_index" : "book",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "spring開發基礎",
          "description" : "spring 在java領域非常流行，java程式員都在用。",
          "studymodel" : "201001",
          "price" : 88.6,
          "timestamp" : "2019-08-24 19:11:35",
          "pic" : "group1/M00/00/00/wKhlQFs6RCeAY0pHAAJx5ZjNDEM428.jpg",
          "tags" : [
            "spring",
            "java"
          ]
        },
        "sort" : [
          88.6
        ]
      }
    ]
  }
}

Java代碼

//sort搜尋
    @Test
    public void testSearchSort() throws IOException {
        //1建構搜尋請求
        SearchRequest searchRequest = new SearchRequest("book");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //建構multiMatch請求
        MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery("java程式員", "name", "description");
        //建構match請求
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("studymodel", "201001");
        BoolQueryBuilder boolQueryBuilder=QueryBuilders.boolQuery();
        boolQueryBuilder.must(multiMatchQueryBuilder);
        boolQueryBuilder.should(matchQueryBuilder);
        boolQueryBuilder.filter(QueryBuilders.rangeQuery("price").gte(50).lte(90));
        searchSourceBuilder.query(boolQueryBuilder);
        //按照價格升序
        searchSourceBuilder.sort("price", SortOrder.ASC);
        searchRequest.source(searchSourceBuilder);
        //2執行搜尋
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        //3擷取結果
        SearchHits hits = searchResponse.getHits();
        //資料資料
        SearchHit[] searchHits = hits.getHits();
        System.out.println("--------------------------");
        for (SearchHit hit : searchHits) {
            String id = hit.getId();
            float score = hit.getScore();
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            String name = (String) sourceAsMap.get("name");
            String description = (String) sourceAsMap.get("description");
            Double price = (Double) sourceAsMap.get("price");
            System.out.println("id:" + id);
            System.out.println("name:" + name);
            System.out.println("description:" + description);
            System.out.println("price:" + price);
            System.out.println("==========================");
        }
    }

傳回結果

ElasticSearch7.3學習(二十三)----RestHighLevelClient Java api實作match_all、ids、match、term、multi_match、bool、filter、sort等不同的搜尋方式

10、總結

  1. 在實際的應用過程要注意靈活變通，搜尋方式方法不要一成不變，要思考為什麼這種方式能夠搜尋出來結果，還要思考搜尋結果的正确與否
  2. 在上面的學習過程中，應該也能發現規律，Java代碼中建構搜尋請求與rest 風格的文法及其類似，包括其搜尋方式、代碼層級。是以在實際應用中，要先在kibana中完善搜尋代碼，隻要kibana中能夠搜尋出來，Java代碼一般來說也能行，這樣能夠縮短代碼調試的時間。

本文來自部落格園，作者：|舊市拾荒|，轉載請注明原文連結：https://www.cnblogs.com/xiaoyh/p/16167741.html

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