ElasticSearch（十一）：Spring Data ElasticSearch 的使用（一）

1、环境准备

　我本地使用的环境为：

　　虚拟机版本：Centos 7.3 两台   IP 分别为：192.168.56.12， 192.168.56.13

　　Elasticsearch版本：6.4.0  （已安装IK分词器）

　　虚拟机中JDK版本：12.0.1

　　宿主机系统：Windows 10

　　宿主机JDK版本：1.8

　　Idea版本： 2019.1.3

2、创建工程

　　1)、在Idea中创建一个Maven工程，并导入Spring Data Elasticsearch依赖。

　　   Spring Data Elasticsearch依赖（pom.xml）:　

 <?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>

     <groupId>com.Aiden</groupId>
     <artifactId>SpringData-elasticsearch</artifactId>
     <version>1.0-SNAPSHOT</version>

     <dependencies>
         <dependency>
             <groupId>org.elasticsearch</groupId>
             <artifactId>elasticsearch</artifactId>
             <version>5.6.8</version>
         </dependency>
         <dependency>
             <groupId>org.elasticsearch.client</groupId>
             <artifactId>transport</artifactId>
             <version>5.6.8</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-to-slf4j</artifactId>
             <version>2.9.1</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
             <version>1.7.24</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
             <version>1.7.21</version>
         </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
             <version>1.2.12</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>4.12</version>
         </dependency>

         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
             <version>2.8.1</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>2.8.1</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
             <version>2.8.1</version>
         </dependency>

         <dependency>
             <groupId>org.springframework.data</groupId>
             <artifactId>spring-data-elasticsearch</artifactId>
             <version>3.0.5.RELEASE</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.elasticsearch.plugin</groupId>
                     <artifactId>transport-netty4-client</artifactId>
                 </exclusion>
             </exclusions>
         </dependency>

         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
             <version>5.0.4.RELEASE</version>
         </dependency>

     </dependencies>

 </project>

　　2）、创建配置文件

　　在maven工程的resource目录下创建Spring Data Elasticsearch的配置文件  ApplicationContext.xml，并引入Elasticsearch命名空间

　　ApplicationContext.xml文件内容：

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:elasticsearch="http://www.springframework.org/schema/data/elasticsearch"
        xsi:schemaLocation="
         http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/data/elasticsearch
         http://www.springframework.org/schema/data/elasticsearch/spring-elasticsearch-1.0.xsd
         ">

 </beans>

　　3）、创建实体Film

　　在maven工程中创建包com.Aiden.doamin，并在此包下创建实体类Film

 package com.Aiden.domain;

 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;

 public class Film {

     private Long id;
     private String title;
     private String content;
     private String date;
     private String price;
     private String director;

     public Long getId() {
         return id;
     }

     public void setId(Long 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;
     }

     public String getDate() {
         return date;
     }

     public void setDate(String date) {
         this.date = date;
     }

     public String getPrice() {
         return price;
     }

     public void setPrice(String price) {
         this.price = price;
     }

     public String getDirector() {
         return director;
     }

     public void setDirector(String director) {
         this.director = director;
     }

     @Override
     public String toString() {
         return "Film{" +
                 "id=" + id +
                 ", title='" + title + '\'' +
                 ", content='" + content + '\'' +
                 ", date='" + date + '\'' +
                 ", price='" + price + '\'' +
                 ", director='" + director + '\'' +
                 '}';
     }
 }

　　4）、创建Dao

　　在maven工程中创建com.Aiden.dao包，并在包中创建仓库 FilmRepository

 package com.Aiden.dao;

 import com.Aiden.domain.Film;
 import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
 import org.springframework.stereotype.Repository;

 @Repository
 public interface FilmRepository extends ElasticsearchRepository<Film,Long> {

 }

　　5）、创建Service

　　在maven工程中创建com.Aiden.service包，并在包中创建 FilmService 接口，并在其中添加save方法

 package com.Aiden.service;

 import com.Aiden.domain.Film;

 public interface FilmService {

     public void save(Film film);

 }

　　在刚创建的service包下创建Impl包（即com.Aiden.service.Impl包），并在此包中创建FilmServiceImpl类并实现FilmService接口，实现其方法

 package com.Aiden.service.impl;

 import com.Aiden.dao.FilmRepository;
 import com.Aiden.domain.Film;
 import com.Aiden.service.FilmService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;

 @Service
 public class FilmServiceImpl implements FilmService {

     @Autowired
     private FilmRepository filmRepository;

     public void save(Film film) {
         filmRepository.save(film);
     }

 }

　　6）、修改Spring Data Elasticsearch配置文件ApplicationContext.xml，完成项目配置

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:elasticsearch="http://www.springframework.org/schema/data/elasticsearch"
        xsi:schemaLocation="
         http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/data/elasticsearch
         http://www.springframework.org/schema/data/elasticsearch/spring-elasticsearch-1.0.xsd
         ">

     <!-- 扫描Dao包，自动创建实例 -->
     <elasticsearch:repositories base-package="com.Aiden.dao"/>

     <!-- 扫描Service包，创建Service的实体 -->
     <context:component-scan base-package="com.Aiden.service"/>

     <!-- 配置elasticSearch的连接 -->
     <elasticsearch:transport-client id="client" cluster-nodes="192.168.56.12:9300,192.168.56.13:9300" cluster-name="my-application"/>

     <!-- ElasticSearch模版对象 -->
     <bean id="elasticsearchTemplate" class="org.springframework.data.elasticsearch.core.ElasticsearchTemplate">
         <constructor-arg name="client" ref="client"/>
     </bean>

 </beans>

　　7）、配置实体类

　　基于spring data elasticsearch注解配置索引、映射和实体的关系

 package com.Aiden.domain;

 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;

 @Document(indexName = "film",type = "action")
 public class Film {
     @Id
     private Long id;
     @Field(index = true,analyzer = "ik_max_word",store = true,searchAnalyzer = "ik_max_word",type = FieldType.text)
     private String title;
     @Field(index = true,analyzer = "ik_max_word",store = true,searchAnalyzer = "ik_max_word",type = FieldType.text)
     private String content;
     @Field(index = true,analyzer = "ik_max_word",store = true,searchAnalyzer = "ik_max_word",type = FieldType.text)
     private String date;
     @Field(index = true,analyzer = "ik_max_word",store = true,searchAnalyzer = "ik_max_word",type = FieldType.text)
     private String price;
     @Field(index = true,analyzer = "ik_max_word",store = true,searchAnalyzer = "ik_max_word",type = FieldType.text)
     private String director;

     public Long getId() {
         return id;
     }

     public void setId(Long 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;
     }

     public String getDate() {
         return date;
     }

     public void setDate(String date) {
         this.date = date;
     }

     public String getPrice() {
         return price;
     }

     public void setPrice(String price) {
         this.price = price;
     }

     public String getDirector() {
         return director;
     }

     public void setDirector(String director) {
         this.director = director;
     }

     @Override
     public String toString() {
         return "Film{" +
                 "id=" + id +
                 ", title='" + title + '\'' +
                 ", content='" + content + '\'' +
                 ", date='" + date + '\'' +
                 ", price='" + price + '\'' +
                 ", director='" + director + '\'' +
                 '}';
     }
 }

　　8）、创建测试类

　　在maven工程的test文件夹下创建测试类 SpringDataElasticSearchTest，并添加测试方法

 package com.Aiden.Test;

 import com.Aiden.domain.Film;
 import com.Aiden.service.FilmService;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

 import java.util.List;

 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(locations = "classpath:ApplicationContext.xml")
 public class SpringDataElasticSearchTest {

     @Autowired
     private FilmService filmService;

     @Autowired
     private ElasticsearchTemplate elasticsearchTemplate;

     @Test
     public void createIndex() throws Exception {
         elasticsearchTemplate.createIndex(Film.class);
         elasticsearchTemplate.putMapping(Film.class);
     }

     @Test
     public void saveFilm1() {
         Film film = new Film();
         film.setTitle("蜘蛛侠：英雄远征 Spider-Man: Far from Home");
         film.setContent("在复仇者联盟众英雄的努力下，于灭霸无限手套事件中化作为灰烬的人们，重新回到了人世间，曾经消失的蜘蛛侠 彼得帕克 也回归到了普通的生活之中，数月后，蜘蛛侠彼得帕克所在的学校举行了欧洲旅游，帕克也在其中， 在欧州威尼斯旅行时，一个巨大无比的水怪袭击了威尼斯，不敌敌人的蜘蛛侠幸得一位自称神秘客的男子搭救才击退敌人，之后 神盾局局长找上正在旅游的彼得帕克并要求其加入神盾局，并安排神秘客协助帕克，神秘客自称来自其他宇宙，并告知一群名为元素众的邪恶势力已经入侵这个宇宙了，为了守护来之不易的和平，蜘蛛侠决定与神秘客联手，然而在神秘客那头罩之中，似乎隐藏着什么不为人知的真相……");
         film.setDate("2019-06-28");
         film.setDirector("乔·沃茨");
         film.setPrice("78");
         film.setId(1L);
         filmService.save(film);
     }

 }

　　9）、运行测试

　　执行SpringDataElasticSearchTest中的测试方法 createIndex 、saveFilm1，创建索引及加入文档。

　　测试方法执行完毕，在head插件中查看Elasticsearch集群中索引情况：

　　索引创建成功：

　

查看索引信息中的mapping信息，创建正常：

执行saveFilm1加入文档，文档加入成功：

至此Spring Data Elasticsearch工程创建成功！