SpringBoot elasticsearch query operation (RestHighLevelClient case practice)

PUT /hotel
{
  "mappings": {
    "properties": {
      "id": {
        "type": "keyword"
      },
      "name":{
        "type": "text",
        "analyzer": "ik_max_word",
        "copy_to": "all"
      },
      "address":{
        "type": "keyword",
        "index": false
      },
      "price":{
        "type": "integer"
      },
      "score":{
        "type": "integer"
      },
      "brand":{
        "type": "keyword",
        "copy_to": "all"
      },
      "city":{
        "type": "keyword",
        "copy_to": "all"
      },
      "starName":{
        "type": "keyword"
      },
      "business":{
        "type": "keyword"
      },
      "location":{
        "type": "geo_point"
      },
      "pic":{
        "type": "keyword",
        "index": false
      },
      "all":{
        "type": "text",
        "analyzer": "ik_max_word"
      }
    }
  }
}

@GetMapping("/searchAll")
public List<HotelDoc> searchAll() throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    ().query(());
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

 @GetMapping("/searchByName/{name}")
public List<HotelDoc> searchByName(@PathVariable("name") String name) 
	throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    ().query(("name", name));
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

@GetMapping("/searchByNameAndBrand/{name}")
public List<HotelDoc> searchByNameAndBrand(@PathVariable("name") String name) throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    ().query((name,"name","brand"));
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

@GetMapping("/searchByBrand/{name}")
public List<HotelDoc> searchByBrand(@PathVariable("name") String name) throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    ().query(("brand", name));
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

 @GetMapping("/searchByPrice/{low}/{high}")
public List<HotelDoc> searchByPrice(@PathVariable("low") String low, @PathVariable("high") String high) throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    ().query(("price").gte(low).lte(high));
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

@GetMapping("/termQueryCity/{city}")
public List<HotelDoc> termQueryCity(@PathVariable("city") String city) throws Exception {
    //1. Create a request semantic object
    SearchRequest searchRequest = new SearchRequest("Index name");
    // QueryBuilders: building query types
    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
	//((("city", city)); There's a little problem with this line.
	// /p/270426807 Ref.
    (("", city));
    (searchSourceBuilder);
    SearchResponse searchResponse = (searchRequest, );
    return handleResponse(searchResponse);
}

@GetMapping("/testBool")
public List<HotelDoc> testBool() throws Exception {
    // 1. Prepare the Request
    SearchRequest request = new SearchRequest("Index name");
    // 2. Prepare the DSL
    // 2.1. Preparing BooleanQuery
    BoolQueryBuilder boolQuery = ();
    // 2.2. Adding a term
    (("", "Hangzhou subprovincial city and capital of Zhejiang province in southeast China"));
    // 2.3. Adding a range
    (("price").lte(250));
    ().query(boolQuery);
    // 3. Send the request
    SearchResponse response = (request, );
    // 4. Parsing the response
    return handleResponse(response);
}

 @GetMapping("/testPageAndSort/{currentPage}/{pageSize}")
public List<HotelDoc> testPageAndSort(@PathVariable("currentPage") Integer currentPage, @PathVariable("pageSize") Integer pageSize) throws Exception {
    // Page number, size per page
    // 1. Prepare the Request
    SearchRequest request = new SearchRequest("Index name");
    // 2. Prepare the DSL
    // 2.
    ().query(());
    // 2.2. sort sort
    ().sort("price", );
    // 2.3. Pagination from, size
    ().from((currentPage - 1) * pageSize).size(pageSize);
    // 3. Send the request
    SearchResponse response = (request, );
    // 4. Parsing the response
    return handleResponse(response);
}

 @GetMapping("/testHighlight/{name}")
void testHighlight(@PathVariable("name") String name) throws Exception {
    // 1. Prepare the Request
    SearchRequest request = new SearchRequest("Index name");
    // 2. Prepare the DSL
    // 2.
    ().query(("name", name));
    // 2.2. Highlighting
    ().highlighter(new HighlightBuilder().field("name").requireFieldMatch(false));
    // 3. Send the request
    SearchResponse response = (request, );
    // 4. Parsing the response
    handleResponse2(response);
}

private List<HotelDoc> handleResponse(SearchResponse response) throws Exception {
    // Get all the contents of the hit
    SearchHits searchHits = ();
    // Get the total number of hits
    long count = ().value;
    ("The number of hits is:"+ count);
    // Get an array of hit document objects
    SearchHit[] hits = ();
    List<HotelDoc> docList = new ArrayList<>();
    for (SearchHit hit : hits) {
        // Parsing each hit object to get the corresponding document data
        String json = ();
        //  HotelDoc hotelDoc = (json, );
        ((json, ));
    }
    //destroy();
    return docList;
}
private void handleResponse2(SearchResponse response) {
    // 4. Parsing the response
    SearchHits searchHits = ();
    // 4.1. Getting the total number of entries
    long total = ().value;
    ("Total searches found" + total + "Article data");
    // 4.2. Document arrays
    SearchHit[] hits = ();
    // 4.3. Iteration
    for (SearchHit hit : hits) {
        // Get the document source
        String json = ();
        // Deserialization
        HotelDoc hotelDoc = (json, );
        // Getting Highlighted Results
        Map<String, HighlightField> highlightFields = ();
        if ( !(highlightFields) ) {
            // Get highlighting results by field name
            HighlightField highlightField = ("name");
            if (highlightField != null) {
                // Get the highlighted value
                String name = ()[0].string();
                // Override non-highlighted results
                (name);
            }
        }
        ("hotelDoc = " + hotelDoc);
    }
}