ElasticSearch(5.5.2)在java中的使用

ElasticSearch(5.5.2)在java中的使用

https://blog.csdn.net/didiaodeabing/article/details/79310710

 pom.xml:

<?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.stono</groupId>
  <artifactId>es01</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>es01</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch -->
    <dependency>
      <groupId>org.elasticsearch</groupId>
      <artifactId>elasticsearch</artifactId>
      <version>5.5.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.elasticsearch.client/transport -->
    <dependency>
      <groupId>org.elasticsearch.client</groupId>
      <artifactId>transport</artifactId>
      <version>5.5.1</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>2.7</version>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <version>2.7</version>
    </dependency>
    <dependency>
      <groupId>com.google.code.gson</groupId>
      <artifactId>gson</artifactId>
      <version>2.8.0</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-elasticsearch</artifactId>
    </dependency>
  </dependencies>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

java:

package com.stono;

import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class ElasticSearchTest {
    public final static String HOST = "127.0.0.1";
    public final static int PORT = 9300;
    private TransportClient client = null;

    @Before
    public void getConnect() throws UnknownHostException {
        client = new PreBuiltTransportClient(Settings.EMPTY).addTransportAddresses(
                new InetSocketTransportAddress(InetAddress.getByName(HOST), PORT)
        );
        System.out.println("连接信息：" + client.toString());
    }

    @After
    public void closeConnect() {
        if (null != client) {
            System.out.println("执行关闭连接操作");
            client.close();
        }
    }

    // 使用XContentBuilder创建索引
    @Test
    public void addIndex() throws IOException {
        System.out.println("测试中，使用XContentBuilder创建索引");
        /*
        建立文档对象
        参数一blog1: 表示索引对象
        参数二article: 类型
        参数三1: 建立id
         */
        XContentBuilder builder = XContentFactory.jsonBuilder()
                .startObject()
                .field("id", 1)
                .field("title", "elasticSearch引擎")
                .field("content", "全球搜索服务器")
                .endObject();
        IndexResponse indexResponse = client.prepareIndex("blog1", "article", Integer.toString(1)).setSource(builder).get();
        // 结果获取
        String index = indexResponse.getIndex();
        String type = indexResponse.getType();
        String id = indexResponse.getId();
        long version = indexResponse.getVersion();
        RestStatus status = indexResponse.status();
        System.out.println("索引：" + index + "; 类型：" + type + "; id：" + id + "; 版本：" + version + "; 状态：" + status);
    }

    // 使用JSON创建索引
    @Test
    public void addIndex2() throws IOException {
        System.out.println("测试中，使用JSON创建索引");
        String json = "{" +
                ""name":"深入浅出Node.js"," +
                ""author":"朴灵 "," +
                ""pubinfo":"人民邮电出版社 "," +
                ""pubtime":"2013-12-1 "," +
                ""desc":"本书从不同的视角介绍了 Node 内在的特点和结构。由首章Node 介绍为索引，涉及Node 的各个方面，主要内容包含模块机制的揭示、异步I/O 实现原理的展现、异步编程的探讨、内存控制的介绍、二进制数据Buffer 的细节、Node 中的网络编程基础、Node 中的Web 开发、进程间的消息传递、Node 测试以及通过Node 构建产品需要的注意事项。最后的附录介绍了Node 的安装、调试、编码规范和NPM 仓库等事宜。本书适合想深入了解 Node 的人员阅读。"" +
                "}";
        IndexResponse indexResponse = client.prepareIndex("blog2", "goods").setSource(json).get();
        // 结果获取
        String index = indexResponse.getIndex();
        String type = indexResponse.getType();
        String id = indexResponse.getId();
        long version = indexResponse.getVersion();
        RestStatus status = indexResponse.status();
        System.out.println("索引：" + index + "; 类型：" + type + "; id：" + id + "; 版本：" + version + "; 状态：" + status);

    }

    // 使用Map创建索引
    @Test
    public void addIndex3() throws IOException {
        System.out.println("测试中，使用Map创建索引");
        Map<String, Object> map = new HashMap<>();
        map.put("name", "Go Web编程");
        map.put("author", "谢孟军 ");
        map.put("pubinfo", "电子工业出版社");
        map.put("pubtime", "2013-6");
        map.put("desc", "《Go Web编程》介绍如何使用Go语言编写Web，包含了Go语言的入门、Web相关的一些知识、Go中如何处理Web的各方面设计（表单、session、cookie等）、数据库以及如何编写GoWeb应用等相关知识。通过《Go Web编程》的学习能够让读者了解Go的运行机制，如何用Go编写Web应用，以及Go的应用程序的部署和维护等，让读者对整个的Go的开发了如指掌。");
        IndexResponse indexResponse = client.prepareIndex("blog2", "goods").setSource(map).execute().actionGet();
        // 结果获取
        String index = indexResponse.getIndex();
        String type = indexResponse.getType();
        String id = indexResponse.getId();
        long version = indexResponse.getVersion();
        RestStatus status = indexResponse.status();
        System.out.println("索引：" + index + "; 类型：" + type + "; id：" + id + "; 版本：" + version + "; 状态：" + status);

    }

    // 删除索引
//    @Test
    public void deleteByObject() throws Exception {
        DeleteResponse deleteResponse = client.delete(new DeleteRequest("blog1", "article", Integer.toString(1))).get();
    }

    // 获取文档信息
    @Test
    public void getIndexNoMapping() throws Exception {
        GetResponse actionGet = client.prepareGet("blog1", "article", "1").execute().actionGet();
        System.out.println(actionGet.getSourceAsString());
    }

    // 查询所有文档信息
    @Test
    public void getMatchAll() throws IOException {
        SearchResponse searchResponse = client.prepareSearch("blog1")
                .setTypes("article").setQuery(QueryBuilders.matchAllQuery())
                .get(); // get() === execute().actionGet()
        // 获取命中次数，查询结果有多少对象
        SearchHits hits = searchResponse.getHits();
        System.out.println("查询结果有：" + hits.getTotalHits() + "条");
        Iterator<SearchHit> iterator = hits.iterator();
        while (iterator.hasNext()) {
            // 查询每个对象
            SearchHit searchHit = iterator.next();
            System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
            System.out.println("title:" + searchHit.getSource().get("title"));
        }
    }

    // 关键字查询
    @Test
    public void getKeyWord() throws IOException {
        long time1 = System.currentTimeMillis();
        SearchResponse searchResponse = client.prepareSearch("blog1")
                .setTypes("article").setQuery(QueryBuilders.queryStringQuery("你们"))
                .get();
        // 获取命中次数，查询结果有多少对象
        SearchHits hits = searchResponse.getHits();
        System.out.println("查询结果有：" + hits.getTotalHits() + "条");
        Iterator<SearchHit> iterator = hits.iterator();
        while (iterator.hasNext()) {
            // 查询每个对象
            SearchHit searchHit = iterator.next();
            // 获取字符串格式打印
            System.out.println(searchHit.getSourceAsString());
            System.out.println("title:" + searchHit.getSource().get("title"));
        }
        long time2 = System.currentTimeMillis();
        System.out.println("花费" + (time2 - time1) + "毫秒");
    }

    // 通配符、词条查询
    @Test
    public void getByLike() throws IOException {
        long time1 = System.currentTimeMillis();
        SearchResponse searchResponse = client.prepareSearch("blog1")
                .setTypes("article").setQuery(QueryBuilders.wildcardQuery("desc", "你们*")) // 通配符查询
                .setTypes("article").setQuery(QueryBuilders.wildcardQuery("content", "服务器"))
                .setTypes("article").setQuery(QueryBuilders.termQuery("content", "全文")) // 词条查询
                // 一般情况下只显示十条数据
                // from + size must be less than or equal to: [10000]
                // Scroll Search 支持1万以上的数据量
                // .setSize(10000)
                .get();
        // 获取命中次数，查询结果有多少对象
        SearchHits hits = searchResponse.getHits();
        System.out.println("查询结果有：" + hits.getTotalHits() + "条");
        Iterator<SearchHit> iterator = hits.iterator();
        while (iterator.hasNext()) {
            // 查询每个对象
            SearchHit searchHit = iterator.next();
            // 获取字符串格式打印
            System.out.println(searchHit.getSourceAsString());
            System.out.println("title:" + searchHit.getSource().get("title"));
        }
        long time2 = System.currentTimeMillis();
        System.out.println("花费" + (time2 - time1) + "毫秒");
    }

    // 组合查询
    @Test
    public void combinationQuery() throws Exception {
        SearchResponse searchResponse = client.prepareSearch("blog1").setTypes("article")
                .setQuery(QueryBuilders.boolQuery().must(QueryBuilders.termQuery("title", "搜索"))// 词条查询
//                        .must(QueryBuilders.rangeQuery("id").from(1).to(5)) // 范围查询
                                // 因为IK分词器，在存储的时候将英文都转成了小写
                                .must(QueryBuilders.wildcardQuery("content", "Rest*".toLowerCase())) // 模糊查询
                                .must(QueryBuilders.queryStringQuery("服电风扇丰盛的电器")) // 关键字（含有）
                ).get();
        SearchHits hits = searchResponse.getHits();
        System.out.println("总记录数：" + hits.getTotalHits());
        Iterator<SearchHit> iterator = hits.iterator();
        while (iterator.hasNext()) {
            SearchHit searchHit = iterator.next();
            System.out.println(searchHit.getSourceAsString());
            Map<String, Object> source = searchHit.getSource();
            System.out.println(source.get("id") + ";" + source.get("title") + ";" + source.get("content"));
        }


    }

}