elasticsearch之hello(spring data整合)

Posted 2020-10-19 fjk

1.书写pom.xml文件

	<dependencies>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-elasticsearch</artifactId>
			<version>2.0.4.RELEASE</version>
		</dependency>
		<dependency>
  		<groupId>org.springframework.data</groupId>
  		<artifactId>spring-data-elasticsearch</artifactId>
  		<version>2.0.4.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-test</artifactId>
  		<version>4.2.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>junit</groupId>
  		<artifactId>junit</artifactId>
  		<version>4.12</version>
  	</dependency>
  	<dependency>
  		<groupId>org.slf4j</groupId>
  		<artifactId>slf4j-log4j12</artifactId>
  		<version>1.7.12</version>
  	</dependency>
	</dependencies>

　　2.applicationContext.xml文件

<?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 自动创建实现 -->
 	<elasticsearch:repositories base-package="com.baidu.dao" />
 
 	<!-- 扫描Service包 -->
 	<context:component-scan base-package="com.baidu.service" />
 	
 	<!-- 配置elasticsearch 连接 -->
 	<elasticsearch:transport-client id="client" cluster-nodes="localhost:9300" />
 	
 	<!-- spring data elasticsearch DAO 必须依赖 elasticsearchTemplate  -->
 	<bean id="elasticsearchTemplate" 
 		class="org.springframework.data.elasticsearch.core.ElasticsearchTemplate">
 		<constructor-arg name="client" ref="client" />
 	</bean>
 	
</beans>

　　

Demo01.java

package com.baidu.test01;

import org.elasticsearch.client.Client;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.baidu.domain.Article;
import com.baidu.service.ArticleService;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Demo01 {
	
	@Autowired
	private ArticleService articleService;

	@Autowired
	private Client client; // 基于原生API

	@Autowired
	private ElasticsearchTemplate elasticsearchTemplate;

	@Test  
	public void createIndex() {
		//创建索引
		elasticsearchTemplate.createIndex(Article.class);
		//创建映射
		elasticsearchTemplate.putMapping(Article.class);
	}
	@Test  //创建文档
	public void createDoc() {
		for (int i = 2; i < 20; i++) {
			Article ac=new Article();
			ac.setId(i);
			ac.setTitle("testSave"+i);
			ac.setContent("仅仅只是在测试test"+i);
			//文档操作
			articleService.save(ac);
		}
	}
	@Test  //查询文档
	public void searchDoc() {
		//文档操作
		articleService.findAll();
	}
	
	@Test  //查询文档
	public void searchDoc01() {
		//文档操作
		articleService.findById(1);
	}
	
	@Test  //查询文档
	public void searchDoc02() {
		//模糊查询
		articleService.findByTitle("testsave");
	}
	
	@Test  //查询文档
	public void searchDoc03() {
		PageRequest pr=new PageRequest(0, 4,new Sort(Direction.DESC, "id"));
		//分页查询  按照降序排序
		articleService.findAll(pr);
	}
}

　　

ArticleService.java文件（接口）

package com.baidu.service;

import org.springframework.data.domain.PageRequest;

import com.baidu.domain.Article;

public interface ArticleService {
	void save(Article ac);

	void findAll();

	void findById(Integer i);

	void findAll(PageRequest pr);

	void findByTitle(String string);

}　

ArticleService实现类

package com.baidu.service.imp;

import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.WildcardQueryBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.SearchQuery;
import org.springframework.stereotype.Service;

import com.baidu.dao.ArticleDao;
import com.baidu.domain.Article;
import com.baidu.service.ArticleService;

@Service
public class ArticleServiceImp implements ArticleService{

	@Autowired
	private ArticleDao articleDao;
	public void save(Article ac) {
		articleDao.save(ac);
	}
	public void findAll() {
		Iterable<Article> all = articleDao.findAll();
		for (Article article : all) {
			System.out.println(article);
		}
	}
	public void findById(Integer i) {
		Article article = articleDao.findById(i);
		System.out.println(article);
		
	}
	public void findAll(PageRequest pr) {
		Page<Article> page = articleDao.findAll(pr);
		System.out.println(page.getContent());
	}
	public void findByTitle(String string) {
		//需要根据内容的分词进行查询
		QueryBuilder query= new WildcardQueryBuilder("title", "*"+string+"*");
		SearchQuery searchQuery = new NativeSearchQuery(query);
		PageRequest pr=new PageRequest(0, 4,new Sort(Direction.DESC, "id"));
		searchQuery.setPageable(pr);
		Page<Article> page = articleDao.search(searchQuery);
		System.out.println(page.getContent());
	}

}

　　

ArticleDao.java

package com.baidu.dao;

import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;

import com.baidu.domain.Article;

public interface ArticleDao extends ElasticsearchRepository<Article, Integer> {
	Article findById(Integer i);
}