ElasticSearch(8)--使用Java客戶端進行復雜查詢

進行復雜的查詢:

包括:字段匹配查詢、相似度查詢、範圍查詢、組合查詢、查詢加排序

package com.es.querydemo;

import java.net.InetAddress;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Requests;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.sort.SortOrder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.es.bean.Product;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 查詢
 * 
 * @author Beck
 * @date 2018年2月6日
 */
public class TestESQuery2 {
	private static final String HOST = "127.0.0.1";
	private static final int PORT = 9300;
	
	private static final String INDEX = "eshop";
	private static final String TYPE = "product";
	
	private static final ObjectMapper MAPPER = new ObjectMapper();
	
	private TransportClient client = null;
	
	// 查詢加排序
	@Test
	public void SortOrder(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.matchAllQuery())
				.addSort("id", SortOrder.DESC)
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	// 組合查詢
	@Test
	public void boolQuery(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.boolQuery().must(QueryBuilders.matchQuery("id", 3))
						.must(QueryBuilders.matchQuery("title", "超薄")))
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	// 範圍查詢:可以查詢數值也可以查詢字符串
	@Test
	public void rangeQuery(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.rangeQuery("id").from(1).to(3).includeLower(false))
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	// 相似度查詢
	@Test
	public void fuzzyQuery(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.fuzzyQuery("title", "appla"))
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	// 字段匹配查詢,多個字段(會進行分詞然後查詢)
	@Test
	public void multiMatchQuery(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.multiMatchQuery("手機", "title", "id"))
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	// 字段匹配查詢,單個字段(會進行分詞然後查詢)
	@Test
	public void matchQuery(){
		SearchResponse searchResponse = this.client.prepareSearch(INDEX).setTypes(TYPE)
				.setQuery(QueryBuilders.matchQuery("title", "電視機"))
				.get();
		
		// 查詢的總數(命中數)
		SearchHits hits = searchResponse.getHits();
		long totalHits = hits.getTotalHits();
		System.out.println("總記錄數: " + totalHits);
		// 遍歷查詢的結果
		Iterator<SearchHit> iterator = hits.iterator();
		while (iterator.hasNext()){
			SearchHit next = iterator.next();
			// System.out.println(next.getSourceAsString());
			String id = next.getId();
			Map<String, Object> source = next.getSource();
			Integer productId = (Integer) source.get("id");
			String productTitle = (String) source.get("title");
			
			System.out.println("Document ID: " + id);
			System.out.println("商品的id: " + productId);
			System.out.println("商品的title: " + productTitle);
		}
	}
	
	// 獲取客戶端
	@Before
	public void getClient() throws Exception{
		client = TransportClient.builder()
		.build()
		.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(HOST), PORT));
	}
	
	// 關閉客戶端
	@After
	public void closeClient(){
		if (this.client != null){
			this.client.close();
		}
	}
}