SpringDataElasticsearch操作Elasticsearch创建索引库以及创建映射

导包

代码语言：javascript复制

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.8.1</version>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.1</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <!--            6.2.4有坑，所以这里用6.4.3-->
            <version>6.4.3</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
<!--       elasticsearch的启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

application.yml配置

注意:SpringDataElasticsearch底层使用的不是Elasticsearch提供的RestHighLevelClient，而是TransportClient，并不采用Http协议通信，而是访问elasticsearch对外开放的tcp端口

代码语言：javascript复制

spring:
  data:
    elasticsearch:
      cluster-name: text-elastic #集群名称
      cluster-nodes: 127.0.0.1:9301,127.0.0.1:9302,127.0.0.1:9303 #有多少机器,写多少

启动类

代码语言：javascript复制

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class EsDemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(EsDemoApplication.class,args);
    }
}

准备一个pojo对象

代码语言：javascript复制

import lombok.Data;

@Data
public class Esneo{
    private Long id;
    private String title; //标题
    private String category;// 分类
    private String brand; // 品牌
    private Double price; // 价格
    private String images; // 图片地址

    public Esneo() {
    }

    public Esneo(Long id, String title, String category, String brand, Double price, String images) {
        this.id = id;
        this.title = title;
        this.category = category;
        this.brand = brand;
        this.price = price;
        this.images = images;
    }
}

创建索引库以及创建映射

想来想去还是,测试类方便,所有这里还是用测试类的方式演示 实体类注释:

• @Document：声明索引库配置
  • indexName：索引库名称
  • type：类型名称，默认是“docs”
  • shards：分片数量，默认5
  • replicas：副本数量，默认1
• @Id：声明实体类的id
• @Field：声明字段属性
  • type：字段的数据类型
  • analyzer：指定分词器类型
  • index：是否创建索引

修改对应的pojo

代码语言：javascript复制

import lombok.Data;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;

@Data //注意lombok包
@Document(indexName = "lianxi",type = "esneo",shards = 3,replicas =1)
public class Esneo {
    @Id
    private Long id;
    @Field(type = FieldType.Text,analyzer = "ik_max_word")
    private String title; //标题
    @Field(type = FieldType.Keyword)
    private String category;// 分类
    @Field(type = FieldType.Keyword)
    private String brand; // 品牌
    @Field(type = FieldType.Double)
    private Double price; // 价格
    @Field(type = FieldType.Keyword)
    private String images; // 图片地址


    public Esneo() {
    }

    public Esneo(Long id, String title, String category, String brand, Double price, String images) {
        this.id = id;
        this.title = title;
        this.category = category;
        this.brand = brand;
        this.price = price;
        this.images = images;
    }
}

测试类代码

代码语言：javascript复制

import com.itcsnd.pojo.Esneo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringElasticsearchTest {

    @Autowired
    private ElasticsearchTemplate elasticsearchTemplate;


    /**
     * 创建索引和映射
     */
    @Test
    public void testCreateMappingAndIndex(){
        try {
            elasticsearchTemplate.putMapping(Esneo.class);
        } catch (Exception e) {
            elasticsearchTemplate.createIndex(Esneo.class);
            elasticsearchTemplate.putMapping(Esneo.class);
        }
    }

    /**
     * 创建索引库
     */
    @Test
    public void testCreateIndex(){
        // 创建索引库，并制定实体类的字节码
        elasticsearchTemplate.createIndex(Esneo.class);
    }

    /**
     * 创建映射
     */
    @Test
    public void testCreateMapping(){
        // 创建索引库，并制定实体类的字节码
        elasticsearchTemplate.putMapping(Esneo.class);
    }
}

腾讯云测试服务 ElasticsearchService

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