pom.xml引入ElasticSearch

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

application.yml配置

spring:
  elasticsearch:
    uris: 
      - localhost:9200
    username: elastic
    password: password

启动类加入注解@EnableElasticsearchRepositories

@EnableElasticsearchRepositories(basePackages = "com.meta.es.repositories")//repository所在的包路径
@SpringBootApplication
public class SpringBootApplication {
	public static void main(String[] args) {
        SpringApplication.run(SpringBootApplication.class, args);
    }
}

ElasticSearchEntity

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;
import java.util.Date;

@Data
@Document(indexName = "elastic")//indexName索引名称等价于MySQL的表
public class ElasticSearchEntity {
    @Id
    @Field(type = FieldType.Keyword)//关键字在查询的时候不会被拆分
    private String id;

    @Field(type = FieldType.Text)//字符串对应文本类型
    private String name;

    @Field(type = FieldType.Date, format = DateFormat.date_hour_minute_second_millis)//日期类型
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    private Date createTime;

	@Field(type = FieldType.Boolean)//布尔类型
    private boolean isDelete;
}

Repository类继承ElasticsearchRepository

import org.springframework.data.elasticsearch.annotations.Query;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import java.util.List;

//ElasticsearchRepository<实体类,主键类型>
public interface ElasticSearchRepository extends ElasticsearchRepository<ElasticSearchEntity,String> {
    List<ElasticSearchEntity> findByName(String name);
	
	//自定义查询语句
    @Query("{\"match\":{\"name\":\"?0\"}}")
    List<ElasticSearchEntity> findAllByNameUsingAnnotations(String name);
}

ElasticSearchService

import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class ElasticSearchService {
    @Resource
    private ElasticSearchRepository elasticSearchRepository;

    /**
     * 新增/修改
     */
    public void save(final ElasticSearchEntity elasticSearchEntity) {
        this.elasticSearchRepository.save(elasticSearchEntity);
    }

    /**
     * 通过ID查询
     */
    public ElasticSearchEntity findById(final String id){
        return this.elasticSearchRepository.findById(id).orElse(null);
    }

    /**
     * 通过ID删除
     */
    public void deleteById(String id){
        this.elasticSearchRepository.deleteById(id);
    }

    /**
     * 通过名称模糊查询
     */
    public List<ElasticSearchEntity> findByName(final String name){
        return this.elasticSearchRepository.findByName(name);
    }

    /**
     * 通过使用注解名称模糊查询
     */
    public List<ElasticSearchEntity> findAllByNameUsingAnnotations(String name){
        return this.elasticSearchRepository.findAllByNameUsingAnnotations(name);
    }

    /**
     * 分页
     * @param size 数量
     */
    public Page<ElasticSearchEntity> findAllByPage(int page,int size){
        //Sort sort = Sort.by(Sort.Order.desc("create_date"));//排序
        //Pageable pageable =PageRequest.of(Integer.parseInt(page), Integer.parseInt(size), sort);
        Sort sort = Sort.by(Sort.Order.desc("createTime"));//根据
        Pageable pageable =PageRequest.of(page, size, sort);
        return this.elasticSearchRepository.findAll(pageable);
    }
}

ElasticSearchController

import org.springframework.data.domain.Page;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;

@RestController
@RequestMapping("elasticsearch")
public class ElasticSearchController {
    @Resource
    private ElasticSearchService elasticSearchService;

    /**
     * 新增/修改，如果id一致就修改，否则新增
     * @param elasticSearchEntity 实体类
     */
    @PostMapping
    public void save(@RequestBody final ElasticSearchEntity elasticSearchEntity) {
        elasticSearchService.save(elasticSearchEntity);
    }

    /**
     * 通过ID查询
     * @param id ID
     * @return
     */
    @GetMapping("/{id}")
    public ElasticSearchEntity findById(@PathVariable final String id) {
        return elasticSearchService.findById(id);
    }

    /**
     * 通过ID删除
     * @param id ID
     * @return
     */
    @DeleteMapping("/{id}")
    public boolean deleteById(@PathVariable String id) {
        elasticSearchService.deleteById(id);
        return true;
    }

    /**
     * 通过名称模糊查询
     * @param name 名称
     * @return
     */
    @GetMapping("/name/{name}")
    public List<ElasticSearchEntity> findAllByName(@PathVariable String name) {
        return elasticSearchService.findByName(name);
    }

    /**
     * 使用注释的方式名称模糊查询，即：@Query()注解
     * @param name 名称
     * @return
     */
    @GetMapping("/name/{name}/annotations")
    public List<ElasticSearchEntity> findAllByNameAnnotations(@PathVariable String name) {
        return elasticSearchService.findAllByNameUsingAnnotations(name);
    }

    /**
     * 简单分页查询
     * @param page 起始页，默认从0开始
     * @param size 每页数量
     * @return
     */
    @GetMapping("/page")
    public Page<ElasticSearchEntity> findAllByPage(@RequestParam(name = "page",defaultValue = "0") int page, @RequestParam(name = "size",defaultValue = "10") int size){
        return elasticSearchService.findAllByPage(page,size);
    }

}

测试

查看创建的索引（相当于MySQL的表）
method：GET

localhost:9200/_cat/indices

删除索引
method：DELETE

localhost:9200/{索引名称}

查看索引里的全部数据，elastic是实体类@Document定义的indexName
method：GET

localhost:9200/elastic/_search

新增索引里没有ID就是新增，有ID就是修改

修改索引里没有ID就是新增，有ID就是修改

查询

删除

分页

通过name模糊查询