Spring Boot 集成spring-boot-starter-data-elasticsearch

第一步，添加Maven依赖

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        <!--es-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>

第二步，配置yml

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spring:
  elasticsearch:
    uris: http://localhost:9200

第三步，创建索引实体

@Document 指定索引名称

@Field 字段对应类型

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

@Document(indexName = "documents")
public class Document {
    @Id
    private String id;

    @Field(type = FieldType.Text)
    private String title;

    @Field(type = FieldType.Text)
    private String content;

    // Getters and Setters
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

第四步，创建仓库

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import org.apache.hertzbeat.manager.pojo.dto.Document;
import org.springframework.data.elasticsearch.annotations.Query;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface DocumentRepository extends ElasticsearchRepository<Document, String> {
    // 自定义查询方法
    List<Document> findByTitle(String title);

    @Query("{\"match\": {\"name\": \"?0\"}}")
    List<Document> findByName(String name);
}

第五步，调用

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import lombok.extern.slf4j.Slf4j;
import org.apache.hertzbeat.manager.dao.master.DocumentRepository;
import org.apache.hertzbeat.manager.pojo.dto.Document;
import org.apache.hertzbeat.manager.service.DocumentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
import org.springframework.data.elasticsearch.core.SearchHits;
import org.springframework.data.elasticsearch.core.query.Criteria;
import org.springframework.data.elasticsearch.core.query.CriteriaQuery;
import org.springframework.data.elasticsearch.core.query.Query;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.List;

@Slf4j
@Service
public class DocumentServiceImpl implements DocumentService {

    @Autowired
    private DocumentRepository documentRepository;

    @Override
    public Document saveDocument(Document document) {
        return documentRepository.save(document);
    }

    @Override
    public Iterable<Document> getAllDocuments() {
        return  documentRepository.findAll();
    }

    @Override
    public Document getDocumentById(String id) {
        return documentRepository.findById(id).orElse(null);
    }

    @Override
    public List<Document> findByTitle(String title) {
        return documentRepository.findByTitle(title);
    }

    @Override
    public void deleteDocumentById(String id) {
        documentRepository.deleteById(id);
    }

}