Elasticsearch5.0 Java Api -- 插入索引

Posted 2020-09-18

Elasticsearch5.X官方手册

Elasticsearch5.X官方手册中文版

Elasticsearch5.X Java Api官方手册

导入maven依赖

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.0.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.7</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.7</version>
</dependency>
<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20160810</version>
</dependency>

索引内容

　　假设我们要在ES中插入如下索引:

　　index:flow

　　type:data

　　包含三个doc分别为time，inbyte，outbyte

创建包结构

　　创建如下包结构，并在src/main/resources中创建log4j2.properties文件，写入以下内容：

appender.console.type = Console
appender.console.name = console
appender.console.layout.type = PatternLayout

rootLogger.level = info
rootLogger.appenderRef.console.ref = console

创建Flow实体

　　在实体包下创建实体类

 1 package com.juyun.entity;
 2 
 3 public class Flow {
 4     
 5     private String time;
 6     private Integer inbyte;
 7     private Integer outbyte;
 8     
 9     public Flow() {
10         super();
11     }
12 
13     public Flow(String time, Integer inbyte, Integer outbyte) {
14         super();
15         this.time = time;
16         this.inbyte = inbyte;
17         this.outbyte = outbyte;
18     }
19 
20     public String getTime() {
21         return time;
22     }
23 
24     public void setTime(String time) {
25         this.time = time;
26     }
27 
28     public Integer getInbyte() {
29         return inbyte;
30     }
31 
32     public void setInbyte(Integer inbyte) {
33         this.inbyte = inbyte;
34     }
35 
36     public Integer getOutbyte() {
37         return outbyte;
38     }
39 
40     public void setOutbyte(Integer outbyte) {
41         this.outbyte = outbyte;
42     }
43     
44 }

Flow.java

创建Json转换工具类

　　在工具包下创建Java实体对象转json对象的方法

 1 package com.juyun.utils;
 2 
 3 import java.io.IOException;
 4 
 5 import org.elasticsearch.common.xcontent.XContentBuilder;
 6 import org.elasticsearch.common.xcontent.XContentFactory;
 7 
 8 import com.juyun.entity.Flow;
 9 
10 public class JsonUtil {
11 
12     // Java实体对象转json对象
13     public static String model2Json(Flow flow) {
14         String jsonData = null;
15         try {
16             XContentBuilder jsonBuild = XContentFactory.jsonBuilder();
17             jsonBuild.startObject().field("time", flow.getTime()).field("inbyte", flow.getInbyte())
18                     .field("outbyte", flow.getOutbyte()).endObject();
19 
20             jsonData = jsonBuild.string();
21             //System.out.println(jsonData);
22 
23         } catch (IOException e) {
24             e.printStackTrace();
25         }
26         return jsonData;
27     }
28 }

JsonUtil

创建数据生成工厂类

　　在工厂包下创建数据工厂类，生成数据集合

 1 package com.juyun.factory;
 2 
 3 import java.text.SimpleDateFormat;
 4 import java.util.ArrayList;
 5 import java.util.Date;
 6 import java.util.List;
 7 
 8 import com.juyun.entity.Flow;
 9 import com.juyun.utils.JsonUtil;
10 
11 public class DataFactory {
12 
13      public static DataFactory dataFactory = new DataFactory();
14 
15         private DataFactory() {
16         }
17 
18         public DataFactory getInstance() {
19             return dataFactory;
20         }
21 
22         public static List<String> getInitJsonData() {
23             
24             List<String> list = new ArrayList<String>();
25             String data1 = JsonUtil.model2Json(new Flow(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()).toString(),50,200));
26             String data2 = JsonUtil.model2Json(new Flow(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()).toString(),20,60));
27             list.add(data1);
28             list.add(data2);
29             return list;
30         }
31 }

DataFactory

插入索引

　　前面都是数据准备工作，完成后，下面就开始使用elasticsearch提供的java api编写代码。我们将这部分代码都放在test包下。

　　首先测试插入索引功能：

 1 package com.juyun.test;
 2 
 3 import java.net.InetAddress;
 4 import java.util.List;
 5 
 6 import org.elasticsearch.action.index.IndexResponse;
 7 import org.elasticsearch.client.transport.TransportClient;
 8 import org.elasticsearch.common.settings.Settings;
 9 import org.elasticsearch.common.transport.InetSocketTransportAddress;
10 import org.elasticsearch.transport.client.PreBuiltTransportClient;
11 
12 import com.juyun.factory.DataFactory;
13 
14 public class ElasticSearchHandler {
15 
16     /**
17      * 测试插入索引的功能
18      * @param args
19      */
20     public static void main(String[] args) {
21 
22         try {
23             // 设置集群名称 
24             Settings settings = Settings.builder().put("cluster.name", "elasticsearch").build();
25             // 创建client
26             TransportClient client = new PreBuiltTransportClient(settings)
27                     .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("172.16.0.112"), 9300));
28             
29             List<String> jsonData = DataFactory.getInitJsonData();
30             
31             for (int i = 0; i < jsonData.size(); i++) {
32                 IndexResponse response = client.prepareIndex("flow", "data").setSource(jsonData.get(i)).get();
33                 System.out.println("成功创建了一个索引，索引名为："+response.getIndex()+",类别为："+response.getType()+",文档ID为："+response.getId());
34             }
35             
36             // 关闭client
37             client.close();
38 
39         } catch (Exception e) {
40             e.printStackTrace();
41         }
42     }
43 
44 }

ElasticSearchHandler.java