ElasticSearch学习04使用SpringData连接ES

1、创建spring boot项目

2、在pom中添加引用：

<?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 https://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>2.5.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yas</groupId>
    <artifactId>ESSpringData</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ESSpringData</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3、配置文件：

# 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、实体类：

 1 package com.yas.esspringdata.model;
 2 
 3 import lombok.AllArgsConstructor;
 4 import lombok.Data;
 5 import lombok.NoArgsConstructor;
 6 import lombok.ToString;
 7 import org.springframework.data.annotation.Id;
 8 import org.springframework.data.elasticsearch.annotations.Document;
 9 import org.springframework.data.elasticsearch.annotations.Field;
10 import org.springframework.data.elasticsearch.annotations.FieldType;
11 
12 @Data
13 @NoArgsConstructor
14 @AllArgsConstructor
15 @ToString
16 @Document(indexName = "product", shards = 3, replicas = 1)
17 public class Product {
18     //必须有 id,这里的 id 是全局唯一的标识，等同于 es 中的"_id"
19     @Id
20     private Long id;//商品唯一标识
21     /**
22      * type : 字段数据类型
23      * analyzer : 分词器类型
24      * index : 是否索引(默认:true)
25      * Keyword : 短语,不进行分词
26      */
27     @Field(type = FieldType.Text, analyzer = "ik_max_word")
28     private String title;//商品名称
29     @Field(type = FieldType.Keyword)
30     private String category;//分类名称
31     @Field(type = FieldType.Double)
32     private Double price;//商品价格
33     @Field(type = FieldType.Keyword, index = false)
34     private String images;//图片地址
35 }

5、配置类：

 1 package com.yas.esspringdata.config;
 2 import lombok.Data;
 3 import org.apache.http.HttpHost;
 4 import org.elasticsearch.client.RestClient;
 5 import org.elasticsearch.client.RestClientBuilder;
 6 import org.elasticsearch.client.RestHighLevelClient;
 7 import org.springframework.boot.context.properties.ConfigurationProperties;
 8 import org.springframework.context.annotation.Configuration;
 9 import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
10 
11 @ConfigurationProperties(prefix = "elasticsearch")
12 @Configuration
13 @Data
14 public class ElasticsearchConfig extends AbstractElasticsearchConfiguration {
15     private String host ;
16     private Integer port ;
17     //重写父类方法
18     @Override
19     public RestHighLevelClient elasticsearchClient() {
20         RestClientBuilder builder = RestClient.builder(new HttpHost(host, port));
21         RestHighLevelClient restHighLevelClient = new
22                 RestHighLevelClient(builder);
23         return restHighLevelClient;
24     }
25 }

6、DAO类：

 1 package com.yas.esspringdata.dao;
 2 import com.yas.esspringdata.model.Product;
 3 import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
 4 import org.springframework.stereotype.Repository;
 5 
 6 import java.util.List;
 7 
 8 @Repository
 9 public interface ProductDao extends ElasticsearchRepository<Product,Long> {
10 
11     //根据规则编写方法签名
12     List<Product> findProductByTitleContains(String title);
13 
14     //根据规则编写方法签名
15     List<Product> findByTitleAndCategory(String title, String category);
16 }

7、测试：

  1 package com.yas.esspringdata;
  2 
  3 import com.yas.esspringdata.dao.ProductDao;
  4 import com.yas.esspringdata.model.Product;
  5 import org.elasticsearch.index.query.QueryBuilders;
  6 import org.elasticsearch.index.query.TermQueryBuilder;
  7 import org.junit.jupiter.api.Test;
  8 import org.springframework.boot.test.context.SpringBootTest;
  9 import org.springframework.beans.factory.annotation.Autowired;
 10 import org.springframework.data.domain.Page;
 11 import org.springframework.data.domain.PageRequest;
 12 import org.springframework.data.domain.Sort;
 13 import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
 14 
 15 import java.util.ArrayList;
 16 import java.util.List;
 17 
 18 @SpringBootTest
 19 class EsSpringDataApplicationTests {
 20 
 21     //注入 ElasticsearchRestTemplate
 22     @Autowired
 23     private ElasticsearchRestTemplate elasticsearchRestTemplate;
 24 
 25     //创建索引并增加映射配置
 26     @Test
 27     public void createIndex() {
 28         //创建索引，系统初始化会自动创建索引
 29         //elasticsearchRestTemplate.indexOps(Product.class).create();
 30         System.out.println("创建索引");
 31     }
 32 
 33     @Autowired
 34     private ProductDao productDao;
 35 
 36     /**
 37      * 新增
 38      */
 39     @Test
 40     public void save() {
 41         Product product = new Product();
 42         product.setId(2L);
 43         product.setTitle("华为手机");
 44         product.setCategory("手机");
 45         product.setPrice(2999.0);
 46         product.setImages("http://www.atguigu/hw.jpg");
 47         productDao.save(product);
 48     }
 49 
 50     //新增或修改
 51     @Test
 52     public void update() {
 53         Product product = new Product();
 54         product.setId(1L);
 55         product.setTitle("小米 2 手机");
 56         product.setCategory("手机");
 57         product.setPrice(9999.0);
 58         product.setImages("http://www.atguigu/xm.jpg");
 59         productDao.save(product);
 60     }
 61 
 62     //根据 id 查询
 63     @Test
 64     public void findById() {
 65         Product product = productDao.findById(1L).get();
 66         System.out.println(product);
 67     }
 68 
 69     //查询所有
 70     @Test
 71     public void findAll() {
 72         Iterable<Product> products = productDao.findAll();
 73         for (Product product : products) {
 74             System.out.println(product);
 75         }
 76     }
 77 
 78     //删除
 79     @Test
 80     public void delete() {
 81         Product product = new Product();
 82         product.setId(1L);
 83         productDao.delete(product);
 84     }
 85 
 86     //批量新增
 87     @Test
 88     public void saveAll() {
 89         List<Product> productList = new ArrayList<>();
 90         for (int i = 0; i < 10; i++) {
 91             Product product = new Product();
 92             product.setId(Long.valueOf(i));
 93             product.setTitle("[" + i + "]小米手机");
 94             product.setCategory("手机");
 95             product.setPrice(1999.0 + i);
 96             product.setImages("http://www.atguigu/xm.jpg");
 97             productList.add(product);
 98         }
 99         productDao.saveAll(productList);
100     }
101 
102     //分页查询
103     @Test
104     public void findByPageable() {
105         //设置排序(排序方式，正序还是倒序，排序的 id)
106         Sort sort = Sort.by(Sort.Direction.DESC, "id");
107         int currentPage = 0;//当前页，第一页从 0 开始，1 表示第二页
108         int pageSize = 5;//每页显示多少条
109         //设置查询分页
110         PageRequest pageRequest = PageRequest.of(currentPage, pageSize, sort);
111         //分页查询
112         Page<Product> productPage = productDao.findAll(pageRequest);
113         for (Product Product : productPage.getContent()) {
114             System.out.println(Product);
115         }
116     }
117 
118     /**
119      * term 查询
120      * search(termQueryBuilder) 调用搜索方法，参数查询构建器对象
121      */
122     @Test
123     public void termTitleAndCategory() {
124         final List<Product> products = productDao.findByTitleAndCategory("小米", "电视");
125         for(Product p : products){
126             System.out.println(p);
127         }
128     }
129 
130     @Test
131     public void termTitle(){
132         final List<Product> products = productDao.findProductByTitleContains("5");
133         for(Product p : products){
134             System.out.println(p);
135         }
136     }
137 }

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原文地址：https://www.cnblogs.com/asenyang/p/15527705.html