es(七)--Spring Data ElasticSearch 使用
2021-06-10 03:04
标签:lang enc 工程 图片 string jar XML osi index Spring Data是一个用于简化数据库访问,并支持云服务的开源框架。其主要目标是使得对数据的访问变得方便快捷,并支持map-reduce框架和云计算数据服务。 Spring Data可以极大的简化JPA的写法,可以在几乎不用写实现的情况下,实现对数据的访问和操作。除了CRUD外,还包括如分页、排序等一些常用的功能。 Spring Data的官网:http://projects.spring.io/spring-data/ Spring Data常用的功能模块如下 1.工程搭建 2.管理索引库 3.创建索引 4.添加文档 5.删除文档 6.查询索引库 7.自定义查询方法 8.使用原生的条件查询 基于spring data elasticsearch注解配置索引、映射和实体的关系 1)dao层实现 2)service层实现 3)测试代码 分出来的词是或的关系 es(七)--Spring Data ElasticSearch 使用 标签:lang enc 工程 图片 string jar XML osi index 原文地址:https://www.cnblogs.com/psyduck/p/14467565.html1.Spring Data ElasticSearch简介
1.1什么是Spring Data
1.2Spring Data ElasticSearch入门
1.配置elasticsearch:transport-client
2.elasticsearch:respositories:包臊面,扫描dao
3.配置elasticsearchTemplate对象,就是一个bean
Pageable pageable = PageRequest.of(0,15);
1)创建一个NativeSearchQuery对象,设置查询条件:QueryBuilder对象
2)使用ElasticsearchTemplate对象执行查询
3)取得查询结果1)导入Spring Data ElasticSearch坐标
2)创建applicationContext.xml配置文件,引入elasticsearch命名空间
3)编写实体Article
package com.itheima.domain;
public class Article {
private Integer id;
private String title;
private String content;
public Integer getId() {
return id;
}
public void setId(Integer 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;
}
@Override
public String toString() {
return "Article [id=" + id + ", title=" + title + ", content=" + content + "]";
}
}
4)编写Dao
package com.itheima.dao;
import com.itheima.domain.Article;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
/**
*Article:dao要对哪一个对象进行操作
*Integer:主键为Integer类型
@Repository
public interface ArticleRepository extends ElasticsearchRepository {
}
5)编写Service
package com.itheima.service;
import com.itheima.domain.Article;
public interface ArticleService {
public void save(Article article);
}
package com.itheima.service.impl;
import com.itheima.dao.ArticleRepository;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class ArticleServiceImpl implements ArticleService {
@Autowired
private ArticleRepository articleRepository;
public void save(Article article) {
articleRepository.save(article);
}
}
6)配置applicationContext.xml
7)配置实体
package com.itheima.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 文档对象 (索引信息、文档类型 )
@Document(indexName="blog3",type="article")
public class Article {
//@Id 文档主键 唯一标识
@Id
//@Field 每个文档的字段配置(类型、是否分词、是否存储、分词器 )
@Field(store=true, index = false,type = FieldType.Integer)
private Integer id;
@Field(index=true,analyzer="ik_smart",store=true,searchAnalyzer="ik_smart",type = FieldType.text)
private String title;
@Field(index=true,analyzer="ik_smart",store=true,searchAnalyzer="ik_smart",type = FieldType.text)
private String content;
public Integer getId() {
return id;
}
public void setId(Integer 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;
}
@Override
public String toString() {
return "Article [id=" + id + ", title=" + title + ", content=" + content + "]";
}
}
其中,注解解释如下:
@Document(indexName="blob3",type="article"):
indexName:索引的名称(必填项)
type:索引的类型
@Id:主键的唯一标识
@Field(index=true,analyzer="ik_smart",store=true,searchAnalyzer="ik_smart",type = FieldType.text)
index:是否设置分词
analyzer:存储时使用的分词器
searchAnalyze:搜索时使用的分词器
store:是否存储
type: 数据类型
8)创建测试类SpringDataESTest
package com.itheima.test;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.elasticsearch.client.transport.TransportClient;
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;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:applicationContext.xml")
public class SpringDataESTest {
@Autowired
private ArticleService articleService;
@Autowired
private TransportClient client;
@Autowired
private ElasticsearchTemplate elasticsearchTemplate;
/**创建索引和映射*/
@Test
public void createIndex(){
//创建索引,并配置映射关系
elasticsearchTemplate.createIndex(Article.class);
//配置映射关系
// elasticsearchTemplate.putMapping(Article.class);//用于只有所以没有映射库的时候
}
/**测试保存文档*/
@Test
public void saveArticle(){
Article article = new Article();
article.setId(100);
article.setTitle("测试SpringData ElasticSearch");
article.setContent("Spring Data ElasticSearch 基于 spring data API 简化 elasticSearch操作,将原始操作elasticSearch的客户端API 进行封装 \n" +
" Spring Data为Elasticsearch Elasticsearch项目提供集成搜索引擎");
articleService.save(article);
}
}
3.Spring Data ElasticSearch的常用操作
3.1 增删改查方法测试
package com.itheima.service;
import com.itheima.domain.Article;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
public interface ArticleService {
//保存
public void save(Article article);
//删除
public void delete(Article article);
//查询全部
public Iterable findAll();
//分页查询
public Page findAll(Pageable pageable);
}
package com.itheima.service.impl;
import com.itheima.dao.ArticleRepository;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
@Service
public class ArticleServiceImpl implements ArticleService {
@Autowired
private ArticleRepository articleRepository;
//更新和保存都用的这个
public void save(Article article) {
articleRepository.save(article);
}
//通过id删除
public void deleteById(Article article) {
articleRepository.deleteById(article);
}
//删除包含该字段的
public void delete(Article article) {
articleRepository.delete(article);
}
//删除所有
public void deleteAll(Article article) {
articleRepository.deleteAll(article);
}
public Iterable findAll() {
Iterable iter = articleRepository.findAll();
iter.forEach(a->sout(a))
return iter;
}
public Article findAllById() {
Optinal optinal = articleRepository.findById();//optinal为了消除控制异常
Article article = optinal.get();
return article;
}
public Page findAll(Pageable pageable) {
return articleRepository.findAll(pageable);
}
}
package com.itheima.test;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.elasticsearch.client.transport.TransportClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:applicationContext.xml")
public class SpringDataESTest {
@Autowired
private ArticleService articleService;
@Autowired
private TransportClient client;
@Autowired
private ElasticsearchTemplate elasticsearchTemplate;
/**创建索引和映射*/
@Test
public void createIndex(){
elasticsearchTemplate.createIndex(Article.class);
elasticsearchTemplate.putMapping(Article.class);
}
/**测试保存文档*/
@Test
public void saveArticle(){
Article article = new Article();
article.setId(100);
article.setTitle("测试SpringData ElasticSearch");
article.setContent("Spring Data ElasticSearch 基于 spring data API 简化 elasticSearch操作,将原始操作elasticSearch的客户端API 进行封装 \n" +
" Spring Data为Elasticsearch Elasticsearch项目提供集成搜索引擎");
articleService.save(article);
}
/**测试保存*/
@Test
public void save(){
Article article = new Article();
article.setId(1001);
article.setTitle("elasticSearch 3.0版本发布");
article.setContent("ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口");
articleService.save(article);
}
/**测试更新*/
@Test
public void update(){
Article article = new Article();
article.setId(1001);
article.setTitle("elasticSearch 3.0版本发布...更新");
article.setContent("ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口");
articleService.save(article);
}
/**测试删除*/
@Test
public void delete(){
Article article = new Article();
article.setId(1001);
articleService.delete(article);
}
/**批量插入*/
@Test
public void save100(){
for(int i=1;i
3.2 常用查询命名规则
3.3 查询方法测试
package com.itheima.dao;
import com.itheima.domain.Article;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import java.util.List;
public interface ArticleRepository extends ElasticsearchRepository {
//根据标题查询
List findByTitle(String condition);
//根据标题查询(含分页)
Page findByTitle(String condition, Pageable pageable);
}
public interface ArticleService {
//根据标题查询
List findByTitle(String condition);
//根据标题查询(含分页)
Page findByTitle(String condition, Pageable pageable);
List findByTitleOrContent(String title,Sting content);
}
package com.itheima.service.impl;
import com.itheima.dao.ArticleRepository;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class ArticleServiceImpl implements ArticleService {
@Autowired
private ArticleRepository articleRepository;
//通过标题查询
public List findByTitle(String condition) {
return articleRepository.findByTitle(condition);
}
//分页查询
public Page findByTitle(String condition, Pageable pageable) {
return articleRepository.findByTitle(condition,pageable);
}
//通过标题或内容查询
public void testFindByTitleOrContent() throws Exception{
articleRepository.findByTitleOrContent("maven","商务与投资")
.forEach(a->sout(a))
}
}
package com.itheima.test;
import com.itheima.domain.Article;
import com.itheima.service.ArticleService;
import org.elasticsearch.client.transport.TransportClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
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 SpringDataESTest {
@Autowired
private ArticleService articleService;
@Autowired
private TransportClient client;
@Autowired
private ElasticsearchTemplate elasticsearchTemplate;
/**条件查询*/
@Test
public void findByTitle(){
String condition = "版本";
List articleList = articleService.findByTitle(condition);
for(Article article:articleList){
System.out.println(article);
}
}
/**条件分页查询*/
@Test
public void findByTitlePage(){
String condition = "版本";
Pageable pageable = PageRequest.of(2,10);
Page page = articleService.findByTitle(condition,pageable);
for(Article article:page.getContent()){
System.out.println(article);
}
}
}
3.4使用Elasticsearch的原生查询对象进行查询。
@Test
public void findByNativeQuery() {
//创建一个SearchQuery对象
SearchQuery searchQuery = new NativeSearchQueryBuilder()
//设置查询条件,此处可以使用QueryBuilders创建多种查询
.withQuery(QueryBuilders.queryStringQuery("备份节点上没有数据").defaultField("title"))
//还可以设置分页信息
.withPageable(PageRequest.of(1, 5))
//创建SearchQuery对象
.build();
//使用模板对象执行查询
elasticsearchTemplate.queryForList(searchQuery, Article.class)
.forEach(a-> System.out.println(a));
}
文章标题:es(七)--Spring Data ElasticSearch 使用
文章链接:http://soscw.com/index.php/essay/92966.html