이 글은 Java의 강력한 Elastisearch검색 엔진의 예제 코드를 주로 소개합니다. 관심 있는 사람은 이에 대해 알아볼 수 있습니다.
Elastisearch는 매우 강력하고 쉽습니다. -엔진을 사용합니다. 검색index엔진
을 사용하여 시스템에서 Elastisearch를 실행하려면 다음 단계만 필요합니다
1. Elastisearch 다운로드.
코드는 다음과 같습니다.wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.0.zip
unzip elasticsearch-5.4.0.zip
elasticsearch-5.4.0/bin/elasticsearch
vi elasticsearch-5.4.0/config/jvm.options
-Xms512M -Xmx512M
curl 'http://localhost:9200/?pretty'
{ "status": 200, "name": "Shrunken Bones", "version": { "number": "1.4.0", "lucene_version": "4.10" }, "tagline": "You Know, for Search" }
Connect 다음으로 Java의 API를 사용하여 Elasticsearch를 작동합니다
먼저 elastisearch 및 log4j 패키지를 가져옵니다. POM<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.jk</groupId> <artifactId>ElasticsearchExample</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>transport</artifactId> <!--用哪个版本就填什么--> <version>5.4.0</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.7</version> </dependency> </dependencies> </project>
1 클라이언트 생성
Client client = null; try { client = new PreBuiltTransportClient(Settings.EMPTY) .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300)); } catch (Exception e) { e.printStackTrace(); }
2. 인덱스 생성
/** * 创建索引,有则先删除 * @param client */ private static void recreateIndex(Client client) { if (client.admin().indices().prepareExists(index).execute().actionGet() .isExists()) { DeleteIndexResponse deleteIndexResponse = client.admin().indices() .delete(new DeleteIndexRequest(index)).actionGet(); System.out.println("delete index :"); System.out.println(deleteIndexResponse); } CreateIndexResponse createIndexResponse = client.admin().indices() .prepareCreate(index).execute().actionGet(); System.out.println("create index :"); System.out.println(createIndexResponse); }
/** * 插入数据 * @param client */ @SuppressWarnings({"rawtypes", "unchecked"}) private static void doIndex(final Client client) { Map s11 = new LinkedHashMap(); s11.put("title", "Think in java"); s11.put("origin", "美国"); s11.put("description", "初级java开发人员必读的书"); s11.put("author", "Bruce Eckel"); s11.put("price", 108); Map s12 = new LinkedHashMap(); s12.put("title", "Head First Java"); s12.put("origin", "英国"); s12.put("description", "java入门教材"); s12.put("author", "Kathy Sierra"); s12.put("price", 54); Map s21 = new LinkedHashMap(); s21.put("title", "Design Pattern"); s21.put("origin", "法国"); s21.put("description", "程序员不得不读的设计模式"); s21.put("author", "Kathy Sierra"); s21.put("price", 89); Map s22 = new LinkedHashMap(); s22.put("title", "黑客与画家"); s22.put("origin", "法国"); s22.put("description", "读完之后脑洞大开"); s22.put("author", "Paul Graham"); s22.put("price", 35); BulkResponse bulkResponse = client .prepareBulk() .add(client.prepareIndex(index, type).setId("11").setSource(s11).setOpType(IndexRequest.OpType.INDEX).request()) .add(client.prepareIndex(index, type).setId("12").setSource(s12).setOpType(IndexRequest.OpType.INDEX).request()) .add(client.prepareIndex(index, type).setId("21").setSource(s21).setOpType(IndexRequest.OpType.INDEX).request()) .add(client.prepareIndex(index, type).setId("22").setSource(s22).setOpType(IndexRequest.OpType.INDEX).request()) .execute().actionGet(); if (bulkResponse.hasFailures()) { System.err.println("index docs ERROR:" + bulkResponse.buildFailureMessage()); } else { System.out.println("index docs SUCCESS:"); System.out.println(bulkResponse); } }
4. 쿼리전체
/** * 查询所有 */ private static void searchAll(Client client) { SearchResponse response = client.prepareSearch(index) .setQuery(QueryBuilders.matchAllQuery()) .setExplain(true).execute().actionGet(); System.out.println("searchAll : "); for (SearchHit searchHit : response.getHits()) { System.out.println("********"); System.out.println(searchHit.getSource()); } }
5. 키워드 쿼리
/** * 关键词查询 * * @param client */ private static void searchKeyWord(Client client) { SearchResponse response = client.prepareSearch(index) //查询所有字段匹配关键字 .setQuery(QueryBuilders.matchQuery("_all", "法国")) //设置最小匹配程度 // .setQuery(QueryBuilders.matchQuery("_all", "法国").minimumShouldMatch("100%")) .execute().actionGet(); System.out.println("searchKeyWord : "); System.out.println(response); }
6. 숫자 범위 필터링
/** * 数值范围过滤 * * @param client */ private static void searchRange(Client client) { SearchResponse response = client.prepareSearch(index). //大于80,小于100 setQuery(QueryBuilders.rangeQuery("price").gt(80).lt(100)) .execute() .actionGet(); System.out.println("searchRange : "); System.out.println(response); }
7. 정렬
/** * 排序 * * @param client */ private static void searchOrdered(Client client) { SearchResponse response = client.prepareSearch(index) .setQuery(QueryBuilders.matchAllQuery()) //根据价格降序排序 .addSort(SortBuilders.fieldSort("price") .order(SortOrder.DESC)).execute().actionGet(); System.out.println("searchOrdered : "); System.out.println(response); }
8. 키워드 강조
/** * 高亮关键字 * @param client */ private static void searchHightlight(Client client) { //高亮多个字段 HighlightBuilder highlightBuilder = new HighlightBuilder(); highlightBuilder.field("title"); highlightBuilder.field("description"); SearchResponse response = client.prepareSearch(index) //单条件匹配,高亮时只能高亮该字段 // .setQuery(QueryBuilders.matchQuery("title", "java")) //多条件匹配,高亮时只能高亮多个字段 .setQuery(QueryBuilders.multiMatchQuery("开发人员必读", "title", "description")) .highlighter(highlightBuilder) .execute() .actionGet(); System.out.println("searchHightlight : "); System.out.println(response); }
검색 🎜>
10. 삭제 /**
* 根据id查找
* @param client
*/
private static void findById(final Client client) {
String id="12";
GetResponse response = client.prepareGet(index, type, id).get();
System.out.println("findById");
System.out.println(response);
}
업데이트 /**
* 删除
* @param client
*/
private static void deleteById(Client client) {
String id="12";
DeleteResponse response = client.prepareDelete(index, type, id).get();
}
위 내용은 Java에서 강력한 Elastisearch 검색 엔진을 사용하기 위한 예제 코드의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!