java elasticsearch-rest-high-level-client 根据歌名搜索，创建索引，根据索引ID搜索
1.pom 导入jar
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.17.4</version>
</dependency>
ElasticSerarchService.java 根据歌名搜索
package com.redis.demo; import com.alibaba.fastjson.JSON; import org.apache.http.HttpHost; import org.elasticsearch.action.get.GetRequest; import org.elasticsearch.action.get.GetResponse; import org.elasticsearch.action.search.SearchRequest; import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.action.search.ShardSearchFailure; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.client.RestClient; import org.elasticsearch.client.RestHighLevelClient; import org.elasticsearch.client.indices.GetIndexRequest; import org.elasticsearch.core.TimeValue; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.rest.RestStatus; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.SearchHits; import org.elasticsearch.search.builder.SearchSourceBuilder; import java.io.IOException; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit; public class ElasticSerarchService { public static void main(String[] args) throws Exception{ RestHighLevelClient client = getClient(); //查询 //默认ID GetRequest getRequest = new GetRequest("songs_v2", "_doc", "5EnOMYEBLnSF9_D_wh38"); GetResponse getResponse = client.get(getRequest, RequestOptions.DEFAULT); System.out.println("根据ID查询="+getResponse.getSourceAsString()); SearchRequest searchRequest = new SearchRequest(); searchRequest.indices("songs_v2"); //查询所有记录 SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); searchSourceBuilder.query(QueryBuilders.matchAllQuery()); searchRequest.source(searchSourceBuilder); // System.out.println("searchSourceBuilder="+ JSON.toJSONString(searchSourceBuilder)); //searchSourceBuilder={"query":{"match_all":{"boost":1.0}}} System.out.println("searchSourceBuilder="+ searchSourceBuilder); //根据条件查询 歌名 // SearchSourceBuilder sourceBuilder = new SearchSourceBuilder(); // sourceBuilder.query(QueryBuilders.termQuery("songName", "tianyi")); // sourceBuilder.from(0); // sourceBuilder.size(5); // sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS)); // searchRequest.source(sourceBuilder); // // //{"from":0,"size":5,"timeout":"60s","query":{"term":{"songName":{"value":"tianyi","boost":1.0}}}} // //打印输出，而不是JSON.toJSONString方式来输出 // System.out.println("sourceBuilder="+ sourceBuilder); System.out.println("searchRequest="+ JSON.toJSONString(searchRequest)); SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT); // RestStatus status = searchResponse.status(); // TimeValue took = searchResponse.getTook(); // Boolean terminatedEarly = searchResponse.isTerminatedEarly(); // boolean timedOut = searchResponse.isTimedOut(); // // int totalShards = searchResponse.getTotalShards(); // int successfulShards = searchResponse.getSuccessfulShards(); // int failedShards = searchResponse.getFailedShards(); // for (ShardSearchFailure failure : searchResponse.getShardFailures()) { // // failures should be handled here // System.out.println("failures should be handled here"); // } SearchHits hits = searchResponse.getHits(); for (SearchHit hit : hits) { // do something with the SearchHit String sourceAsString = hit.getSourceAsString(); // Map<String, Object> sourceAsMap = hit.getSourceAsMap(); // String documentTitle = (String) sourceAsMap.get("title"); // List<Object> users = (List<Object>)) sourceAsMap.get("user"); // Map<String, Object> innerObject = // (Map<String, Object>) sourceAsMap.get("innerObject"); System.out.println("查询结果sourceAsString=" + sourceAsString); } close(client); } private static void close(RestHighLevelClient client) throws IOException { client.close(); } private static RestHighLevelClient getClient() { RestHighLevelClient client = new RestHighLevelClient( RestClient.builder( new HttpHost("localhost", 9200, "http"))); return client; } }
IndexTest.java 创建索引
package com.redis.demo.elasticserach; import com.redis.demo.ElasticSerarchService; import org.apache.http.HttpHost; import org.elasticsearch.ElasticsearchException; import org.elasticsearch.action.ActionListener; import org.elasticsearch.action.DocWriteRequest; import org.elasticsearch.action.index.IndexRequest; import org.elasticsearch.action.index.IndexResponse; import org.elasticsearch.client.Cancellable; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.client.RestClient; import org.elasticsearch.client.RestHighLevelClient; import org.elasticsearch.core.TimeValue; import org.elasticsearch.rest.RestStatus; import org.elasticsearch.xcontent.XContentBuilder; import org.elasticsearch.xcontent.XContentFactory; import org.elasticsearch.xcontent.XContentType; import java.io.IOException; import java.util.Date; import java.util.HashMap; import java.util.Map; public class IndexTest { private static RestHighLevelClient getClient() { RestHighLevelClient client = new RestHighLevelClient( RestClient.builder( new HttpHost("localhost", 9200, "http"))); return client; } private static void close(RestHighLevelClient client) throws IOException { client.close(); } public static void main(String[] args) throws Exception{ IndexRequest request = new IndexRequest("posts"); request.id("1"); String jsonString = "{" + "\"user\":\"kimchy\"," + "\"postDate\":\"2013-01-30\"," + "\"message\":\"trying out Elasticsearch\"" + "}"; request.source(jsonString, XContentType.JSON); // request.routing("routing"); // request.timeout(TimeValue.timeValueSeconds(1)); // request.timeout("1s"); RestHighLevelClient client = getClient(); IndexResponse indexResponse = client.index(request, RequestOptions.DEFAULT); System.out.println("indexResponse1="+indexResponse.getResult()); //无法重复创建索引 Map<String, Object> jsonMap = new HashMap<>(); jsonMap.put("user", "kimchy"); jsonMap.put("postDate", new Date()); jsonMap.put("message", "trying out Elasticsearch"); IndexRequest indexRequest = new IndexRequest("posts") .id("2").source(jsonMap); indexResponse = client.index(indexRequest, RequestOptions.DEFAULT); System.out.println("indexResponse2="+indexResponse.getResult()); XContentBuilder builder = XContentFactory.jsonBuilder(); builder.startObject(); { builder.field("user", "kimchy"); builder.timeField("postDate", new Date()); builder.field("message", "trying out Elasticsearch"); } builder.endObject(); IndexRequest indexRequest3 = new IndexRequest("posts") .id("3").source(builder); indexResponse = client.index(indexRequest3, RequestOptions.DEFAULT); System.out.println("indexResponse3="+indexResponse.getResult()); /** * if (indexResponse.getResult() == DocWriteResponse.Result.CREATED) { * * } else if (indexResponse.getResult() == DocWriteResponse.Result.UPDATED) { * * } */ IndexRequest indexRequest4 = new IndexRequest("posts") .id("4") .source("user", "kimchy", "postDate", new Date(), "message", "trying out Elasticsearch"); ActionListener listener = new ActionListener<IndexResponse>() { @Override public void onResponse(IndexResponse indexResponse) { System.out.println("异步通知结果result =" + indexResponse.getResult()); System.out.println("异步通知结果id =" + indexResponse.getId()); } @Override public void onFailure(Exception e) { System.out.println("异步通知结果异常啦" + e.getMessage()); } }; //异步方式 Cancellable cancellable = client.indexAsync(indexRequest4, RequestOptions.DEFAULT, listener); //处理异常的情况,id重复 主键冲突 IndexRequest request5 = new IndexRequest("posts") .id("1") .source("field", "value") .setIfSeqNo(10L) .setIfPrimaryTerm(20); try { IndexResponse response = client.index(request5, RequestOptions.DEFAULT); } catch(ElasticsearchException e) { if (e.status() == RestStatus.CONFLICT) { System.out.println("5主键冲突啦" + e.getMessage()); } } IndexRequest request6 = new IndexRequest("posts") .id("1") .source("field", "value") .opType(DocWriteRequest.OpType.CREATE); try { IndexResponse response = client.index(request6, RequestOptions.DEFAULT); } catch(ElasticsearchException e) { if (e.status() == RestStatus.CONFLICT) { System.out.println("6主键冲突啦" + e.getMessage()); } } //关闭 close(client); } }
GetRequestTest.java 根据ID查询
package com.redis.demo.elasticserach; import com.redis.demo.ElasticSerarchService; import org.apache.http.HttpHost; import org.elasticsearch.ElasticsearchException; import org.elasticsearch.action.get.GetRequest; import org.elasticsearch.action.get.GetResponse; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.client.RestClient; import org.elasticsearch.client.RestHighLevelClient; import org.elasticsearch.rest.RestStatus; import java.io.IOException; import java.util.Map; public class GetRequestTest { private static RestHighLevelClient getClient() { RestHighLevelClient client = new RestHighLevelClient( RestClient.builder( new HttpHost("localhost", 9200, "http"))); return client; } private static void close(RestHighLevelClient client) throws IOException { client.close(); } public static void main(String[] args) throws Exception{ GetRequest getRequest = new GetRequest( "posts", "100"); try { RestHighLevelClient client = getClient(); GetResponse getResponse = client.get(getRequest, RequestOptions.DEFAULT); String index = getResponse.getIndex(); String id = getResponse.getId(); if (getResponse.isExists()) { long version = getResponse.getVersion(); String sourceAsString = getResponse.getSourceAsString(); // Map<String, Object> sourceAsMap = getResponse.getSourceAsMap(); // byte[] sourceAsBytes = getResponse.getSourceAsBytes(); System.out.println("sourceAsString=" + sourceAsString); } else { System.out.println("getResponse不存在"); } //关闭 close(client); } catch (ElasticsearchException e) { System.out.println("异常"+e.status()); if (e.status() == RestStatus.NOT_FOUND) { System.out.println("未找到"+e.status()); } } } }
