springboot 对应 Elasticsearch的框架集成 增删改查

1. 创建 Maven 项目

点击file-> new->project

 选择maven  --->next

起个名字 直接点击 -->finish

2. 修改 pom 文件，增加依赖关系

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.3.6.RELEASE</version>
 <relativePath/>
 </parent>
 <groupId>com.atguigu.es</groupId>
 <artifactId>springdata-elasticsearch</artifactId>
 <version>1.0</version>
 <properties>
 <maven.compiler.source>8</maven.compiler.source>
 <maven.compiler.target>8</maven.compiler.target>
 </properties>
 <dependencies>
 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-devtools</artifactId>
 <scope>runtime</scope>
 <optional>true</optional>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-test</artifactId>
 <scope>test</scope>
 </dependency>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-test</artifactId>
 </dependency>
 <dependency>
 <groupId>junit</groupId>
 <artifactId>junit</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-test</artifactId>
 </dependency>
 </dependencies>
</project>

3. 增加配置文件

在 resources 目录中增加 application.properties 文件

# es 服务地址
elasticsearch.host=127.0.0.1
# es 服务端口
elasticsearch.port=9200
# 配置日志级别,开启 debug 日志
logging.level.com.atguigu.es=debug

4. SpringBoot 主程序

package com.atguigu.es;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringDataElasticSearchMainApplication {
 public static void main(String[] args) {
 
SpringApplication.run(SpringDataElasticSearchMainApplication.class,args);
 }
}

5. 数据实体类 

package com.atguigu.es;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Product {
 private Long id;//商品唯一标识
 private String title;//商品名称
 private String category;//分类名称
 private Double price;//商品价格
 private String images;//图片地址
}

6. 配置类

ElasticsearchRestTemplate 是 spring-data-elasticsearch 项目中的一个类，和其他 spring 项目中的 template

类似。

在新版的 spring-data-elasticsearch 中， ElasticsearchRestTemplate 代替了原来的 ElasticsearchTemplate 。

原因是 ElasticsearchTemplate 基于 TransportClient ， TransportClient 即将在 8.x 以后的版本中移除。所

以，我们推荐使用 ElasticsearchRestTemplate 。

ElasticsearchRestTemplate 基 于 RestHighLevelClient 客户端的。需要自定义配置类，继承

AbstractElasticsearchConfiguration ，并实现 elasticsearchClient() 抽象方法，创建 RestHighLevelClient 对象

package com.atguigu.es;
import lombok.Data;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import 
org.springframework.data.elasticsearch.config.AbstractElasticsearchConfigura
tion;
@ConfigurationProperties(prefix = "elasticsearch")
@Configuration
@Data
public class ElasticsearchConfig extends AbstractElasticsearchConfiguration {
 private String host ;
 private Integer port ;
 //重写父类方法
 @Override
 public RestHighLevelClient elasticsearchClient() {
 RestClientBuilder builder = RestClient.builder(new HttpHost(host, port));
 RestHighLevelClient restHighLevelClient = new 
RestHighLevelClient(builder);
 return restHighLevelClient;
 }
}

7. DAO 数据访问对象

package com.atguigu.es;
import 
org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface ProductDao extends ElasticsearchRepository<Product,Long> {
}

8. 实体类映射操作

package com.atguigu.es;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
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
@NoArgsConstructor
@AllArgsConstructor
@ToString
@Document(indexName = "shopping", shards = 3, replicas = 1)
public class Product {
 //必须有 id,这里的 id 是全局唯一的标识，等同于 es 中的"_id"
 @Id
 private Long id;//商品唯一标识
 /**
 * type : 字段数据类型
 * analyzer : 分词器类型
 * index : 是否索引(默认:true)
 * Keyword : 短语,不进行分词
 */
 @Field(type = FieldType.Text, analyzer = "ik_max_word")
 private String title;//商品名称
 @Field(type = FieldType.Keyword)
 private String category;//分类名称
 @Field(type = FieldType.Double)
 private Double price;//商品价格
 @Field(type = FieldType.Keyword, index = false)
 private String images;//图片地址
}

9. 索引操作

package com.atguigu.es;
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.ElasticsearchRestTemplate;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringDataESIndexTest {
 //注入 ElasticsearchRestTemplate
 @Autowired
 private ElasticsearchRestTemplate elasticsearchRestTemplate;
 //创建索引并增加映射配置
 @Test
 public void createIndex(){
 //创建索引，系统初始化会自动创建索引
 System.out.println("创建索引");
 }
 @Test
 public void deleteIndex(){
 //创建索引，系统初始化会自动创建索引
 boolean flg = elasticsearchRestTemplate.deleteIndex(Product.class);
 System.out.println("删除索引 = " + flg);
 }
}

10. 文档操作

package com.atguigu.es;
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.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.ArrayList;
import java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringDataESProductDaoTest {
 @Autowired
 private ProductDao productDao;
 /**
 * 新增
 */
 @Test
 public void save(){
 Product product = new Product();
 product.setId(2L);
 product.setTitle("华为手机");
 product.setCategory("手机");
 product.setPrice(2999.0);
 product.setImages("http://www.atguigu/hw.jpg");
 productDao.save(product);
 }
 //修改
 @Test
 public void update(){
 Product product = new Product();
 product.setId(1L);
 product.setTitle("小米 2 手机");
 product.setCategory("手机");
 product.setPrice(9999.0);
 product.setImages("http://www.atguigu/xm.jpg");
 productDao.save(product);
 }
 //根据 id 查询
 @Test
 public void findById(){
 Product product = productDao.findById(1L).get();
 System.out.println(product);
 }
 //查询所有
@Test
 public void findAll(){
 Iterable<Product> products = productDao.findAll();
 for (Product product : products) {
 System.out.println(product);
 }
 }
 //删除
 @Test
 public void delete(){
 Product product = new Product();
 product.setId(1L);
 productDao.delete(product);
 }
 //批量新增
 @Test
 public void saveAll(){
 List<Product> productList = new ArrayList<>();
 for (int i = 0; i < 10; i++) {
 Product product = new Product();
 product.setId(Long.valueOf(i));
 product.setTitle("["+i+"]小米手机");
 product.setCategory("手机");
 product.setPrice(1999.0+i);
 product.setImages("http://www.atguigu/xm.jpg");
 productList.add(product);
 }
 productDao.saveAll(productList);
 }
 //分页查询
 @Test
 public void findByPageable(){
 //设置排序(排序方式，正序还是倒序，排序的 id)
 Sort sort = Sort.by(Sort.Direction.DESC,"id");
 int currentPage=0;//当前页，第一页从 0 开始，1 表示第二页
 int pageSize = 5;//每页显示多少条
 //设置查询分页
 PageRequest pageRequest = PageRequest.of(currentPage, pageSize,sort);
 //分页查询
 Page<Product> productPage = productDao.findAll(pageRequest);
 for (Product Product : productPage.getContent()) {
 System.out.println(Product);
 }
 }
}

11. 文档搜索

package com.atguigu.es;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
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.domain.PageRequest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringDataESSearchTest {
 @Autowired
 private ProductDao productDao;
 /**
 * term 查询
 * search(termQueryBuilder) 调用搜索方法，参数查询构建器对象
 */
 @Test
 public void termQuery(){
 TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", "
小米");
 Iterable<Product> products = productDao.search(termQueryBuilder);
 for (Product product : products) {
 System.out.println(product);
 }
 }
 /**
 * term 查询加分页
 */
 @Test
 public void termQueryByPage(){
 int currentPage= 0 ;
 int pageSize = 5;
 //设置查询分页
 PageRequest pageRequest = PageRequest.of(currentPage, pageSize);
 TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", "
小米");
 Iterable<Product> products = 
productDao.search(termQueryBuilder,pageRequest);
 for (Product product : products) {
 System.out.println(product);
 }
 }
}