springboot集成elasticsearch8.X（8.11） 最新版的Java API Client 接口

1.官网网址：https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/8.11/getting-started-java.html

2.springboot 的elasticsearch相关依赖

         <dependency>
            <groupId>co.elastic.clients</groupId>
            <artifactId>elasticsearch-java</artifactId>
            <version>8.11.2</version>
            <exclusions>
                <exclusion>
                    <groupId>org.elasticsearch.client</groupId>
                    <artifactId>elasticsearch-rest-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client</artifactId>
            <version>8.11.2</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.3</version>
        </dependency>

        <!-- Needed only if you use the spring-boot Maven plugin -->
        <dependency>
            <groupId>jakarta.json</groupId>
            <artifactId>jakarta.json-api</artifactId>
            <version>2.0.1</version>
        </dependency>

      <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

3.添加配置文件

@Configuration
public class GulimallElasticsearchConfig {
    //创造连接，并返回json格式数据
    @Bean
    public ElasticsearchClient elasticsearchClient(){
        RestClient client = RestClient.builder(new HttpHost("localhost",9200,"http")).build();
        ElasticsearchTransport transport = new RestClientTransport(client, new JacksonJsonpMapper());
        return new ElasticsearchClient(transport);
    }


}

4.操作数据?

4.1 测试的实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    public String userName;
    public Integer age;
    public String gender;

}

4.2插入数据?

我是在controller层测试的，操作数据之前请先注入ElasticsearchClient ，检查注入的包是否正确

?import co.elastic.clients.elasticsearch.ElasticsearchClient;

    @Autowired
    private ElasticsearchClient esClient;

      User user = new User("测试", 18, "男");
        try {
            esClient.index(i -> i
                    .id("1")
                    .index("user")
                    .document(user));
        } catch (IOException e) {
            e.printStackTrace();
        }

4.3.查询数据

GetResponse<User > response = esClient.get(g -> g
    .index("user") 
    .id("1"),
    User.class      
);

if (response.found()) {
    User user = response.source();
    logger.info("user name " + user.getUserName());
} else {
    logger.info ("Product not found");
}

添加match条件查询

 User user = new User ();
        try {
            SearchResponse<User> search = esClient.search(s -> s.
                            index("bank")
                            .query(q -> q
                                    .match(t -> t
                                            .field("userName")
                                            .query("测试"))
                            )
                    ,
                    User .class);
            List<Hit<User>> hits = search.hits().hits();
            hits.forEach(productHit -> {
                User source = productHit.source();
                System.out.println(source.toString());
            });

        } catch (Exception e) {
            e.printStackTrace();
        }

删除和修改可以参考官网

官网地址