21 Rest高级客户端实践（七）：一个小案例

文章目录

1 准备
2 编码

1 准备

之前的索引

PUT books
{"settings": {"number_of_shards": 3, "number_of_replicas": 1}, "mappings": {"properties": {"id":{"type": "long"},"title":{"type": "text","analyzer": "ik_max_word"},"language":{"type": "keyword"},"author":{"type": "keyword"},"price":{"type": "double"},"publish_time":{"type": "date","format": "yyyy-MM-dd"},"description":{"type": "text","analyzer": "ik_max_word"}}}}

数据如下
构造这么一个查询，这里就不关心结果了，主要是如何使用java API构造这个一个请求

GET books/_search
{"query": {"bool": {"filter": [{"term": {"author": "张若愚"}}],"must": [{"fuzzy": {"title": "python"}}],"must_not": [{"prefix": {"language": {"value": "j"}}}], "should": [{"range": {"price": {"gte": 0,"lte": 100}}}]}},"highlight": {"fields": {"title": {}}},"_source": {"excludes": ["id","publish_time"]},"suggest": {"my_suggest": {"text": "python","term": {"field": "description"}}},"sort": [{"price": {"order": "desc"}}]
}

上面请求的结果

{"took" : 5,"timed_out" : false,"_shards" : {"total" : 3,"successful" : 3,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 1,"relation" : "eq"},"max_score" : null,"hits" : [{"_index" : "books","_type" : "_doc","_id" : "3","_score" : null,"_source" : {"author" : "张若愚","price" : 81.4,"description" : "零基础学python,光盘中作者独家整合开发winPython运行环境，涵盖了Python各个扩展库","language" : "python","title" : "Python科学计算"},"highlight" : {"title" : ["<em>Python</em>科学计算"]},"sort" : [81.4]}]},"suggest" : {"my_suggest" : [{"text" : "python","offset" : 0,"length" : 6,"options" : [ ]}]}
}

2 编码

package study.wyy.esclient.high;import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;/*** @author wyaoyao* @description* @date 2021/1/8 15:30*/
public abstract class BaseTest {public static RestHighLevelClient client;public static ObjectMapper objectMapper;static {client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http")));objectMapper = new ObjectMapper();}
}

package study.wyy.esclient.high.search;import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.FieldSortBuilder;
import org.elasticsearch.search.sort.SortBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.elasticsearch.search.suggest.SuggestBuilder;
import org.elasticsearch.search.suggest.SuggestBuilders;
import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
import org.junit.Test;
import study.wyy.esclient.high.BaseTest;import java.io.IOException;/*** @author wyaoyao* @description* @date 2021/1/13 14:17*/
@Slf4j
public class SearchTest extends BaseTest {@Testpublic void test() throws IOException {// 1 构建SearchRequestSearchRequest request = buildSearchRequest();// 2 执行请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);log.info(new ObjectMapper().writer().writeValueAsString(response));}private SearchRequest buildSearchRequest() {SearchRequest request = new SearchRequest();// 设置要搜索的索引request.indices("books");// 添加搜索条件,大多数搜索参数都是通过SearchSourceBuilder构建// 构建SearchSourceBuilderSearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();// 设置一些基本参数，超时时间，分页信息（from size）等searchSourceBuilder.timeout(TimeValue.timeValueSeconds(10));searchSourceBuilder.from(0);searchSourceBuilder.size(10);// 构建查询参数QueryBuilder queryBuilder = buildQueryParam();searchSourceBuilder.query(queryBuilder);// 设置高亮HighlightBuilder highlightBuilder = new HighlightBuilder();// title字段高亮HighlightBuilder.Field title = new HighlightBuilder.Field("title");highlightBuilder.field(title);searchSourceBuilder.highlighter(highlightBuilder);// 设置SuggestSuggestBuilder suggestBuilder = new SuggestBuilder();TermSuggestionBuilder text = SuggestBuilders.termSuggestion("description").text("python");suggestBuilder.addSuggestion("my_suggest",text);searchSourceBuilder.suggest(suggestBuilder);// source过滤String[] excludes = {"id","publish_time"};searchSourceBuilder.fetchSource(null,excludes);// 排序FieldSortBuilder sortBuilder = new FieldSortBuilder("price").order(SortOrder.DESC);searchSourceBuilder.sort(sortBuilder);// 最后不要忘记将searchSourceBuilder添加到SearchRequestrequest.source(searchSourceBuilder);return request;}private QueryBuilder buildQueryParam() {QueryBuilder boolQueryBuilder = QueryBuilders.boolQuery()// 过滤.filter(QueryBuilders.termQuery("author", "张若愚"))// 模糊查询.must(QueryBuilders.fuzzyQuery("title", "python"))// 前缀查询.mustNot(QueryBuilders.prefixQuery("language", "j"))// 范围查询.should(QueryBuilders.rangeQuery("price").gte(0).lte(100));return boolQueryBuilder;}
}

最后的输出

{"internalResponse":{"numReducePhases":1,"fragment":true},"scrollId":null,"totalShards":3,"successfulShards":3,"skippedShards":0,"shardFailures":[],"clusters":{"total":0,"successful":0,"skipped":0,"fragment":true},"profileResults":{},"numReducePhases":1,"terminatedEarly":null,"aggregations":null,"timedOut":false,"took":{"hours":0,"minutes":0,"seconds":0,"nanos":12000000,"millis":12,"stringRep":"12ms","micros":12000,"minutesFrac":0.0002,"hoursFrac":0.0000033333333333333333,"days":0,"microsFrac":12000,"daysFrac":0.00000013888888888888888,"millisFrac":12,"secondsFrac":0.012},"suggest":{"fragment":true},"failedShards":0,"hits":{"hits":[{"score":"NaN","id":"3","type":"_doc","nestedIdentity":null,"version":-1,"seqNo":-2,"primaryTerm":0,"highlightFields":{"title":{"name":"title","fragments":[{"fragment":true}],"fragment":true}},"sortValues":[81.4],"matchedQueries":[],"explanation":null,"shard":null,"index":"books","clusterAlias":null,"sourceAsMap":{"author":"张若愚","price":81.4,"description":"零基础学python,光盘中作者独家整合开发winPython运行环境，涵盖了Python各个扩展库","language":"python","title":"Python科学计算"},"innerHits":null,"fields":{},"sourceRef":{"fragment":true},"rawSortValues":[],"sourceAsString":"{"author":"张若愚","price":81.4,"description":"零基础学python,光盘中作者独家整合开发winPython运行环境，涵盖了Python各个扩展库","language":"python","title":"Python科学计算"}","fragment":false}],"totalHits":{"value":1,"relation":"EQUAL_TO"},"maxScore":"NaN","sortFields":null,"collapseField":null,"collapseValues":null,"fragment":true},"fragment":false
}

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21 Rest高级客户端实践（七）：一个小案例

文章目录

1 准备

2 编码

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