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Spring boot 中使用ElasticSearch

0.版本选择

我这里选择了5.6.x，记得如果spring-boot-starter-parent是1.x可以选择2.x版本的elasticsearch，版本要对应，不然会有莫名其妙的问题

1.安装ElasticSearch

https://www.elastic.co/downloads/past-releases

windows 测试的，解压就能用

Spring boot 中使用ElasticSearch

解压，到bin目录，双击elasticsearch.bat

1.1安装elasticsearch-head

https://github.com/mobz/elasticsearch-head

elasticsearch-head是一个网页查看elasticsearch状态，操作的第三方东西

git clone git://github.com/mobz/elasticsearch-head.git
cd elasticsearch-head
npm install
npm run start
open http://localhost:9100/

要先安装node.js

config/elasticsearch.yml文件增加

http.cors.enabled: true

http.cors.allow-origin: “*”

elasticsearch-head/Gruntfile.js

connect: {
			server: {
				options: {
					hostname: '0.0.0.0',
					port: 9100,
					base: '.',
					keepalive: true
				}
			}
		}

Spring boot 中使用ElasticSearch

8082改成你自己的端口

http://127.0.0.1:8082/swagger-ui.html#/

Spring boot 中使用ElasticSearch

0是第一页

application.properties

#===es start===
spring.data.elasticsearch.repositories.enabled = true
spring.data.elasticsearch.cluster-nodes = 127.0.0.1:9300
#===es end===

2.porm

<?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>2.1.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>
	<packaging>jar</packaging>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<!--Swagger-UI API文档生产工具-->
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
			<version>2.6.1</version>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger-ui</artifactId>
			<version>2.6.1</version>
		</dependency>
		<!--Swagger-UI API文档生产工具-->

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</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-starter-web</artifactId>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

主要添加spring-boot-starter-data-elasticsearch，注意spring-boot-starter-parent的版本号

3. GoodsInfo

package com.example.demo.domain;

import org.springframework.data.elasticsearch.annotations.Document;

import java.io.Serializable;

@Document(indexName = "testgoods", type = "goods")
public class GoodsInfo implements Serializable {
    private Long id;
    private String name;
    private String description;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public GoodsInfo(Long id, String name, String description) {
        this.id = id;
        this.name = name;
        this.description = description;
    }

    public GoodsInfo() {
    }
}

indexName 类似数据库名称,type类似表名字

4. GoodsRepository

package com.example.demo.repository;

import com.example.demo.domain.GoodsInfo;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;

@Component
public interface GoodsRepository extends ElasticsearchRepository<GoodsInfo, Long> {
}

这里会帮你封装了很多了

5. HelloWorldController

package com.example.demo.controller;

import com.example.demo.domain.GoodsInfo;
import com.example.demo.repository.GoodsRepository;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder;
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.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.data.elasticsearch.core.query.SearchQuery;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Optional;

import static org.elasticsearch.index.query.QueryBuilders.queryStringQuery;

@Controller
@Api(value = "HelloWorldController|一个用来测试swagger注解的控制器",tags = "HelloWorldController", description = "HelloWorldController")
public class HelloWorldController {

    @Autowired
    private GoodsRepository goodsRepository;

    @ResponseBody
    @RequestMapping(value = "/hello", method = RequestMethod.GET)
    @ApiOperation(value = "根据用户编号获取用户姓名", notes = "test: 仅1和2有正确返回")
    @ApiImplicitParam(paramType="query", name = "userNumber", value = "用户编号", required = true, dataType = "Integer")
    public String index(@RequestParam Integer userNumber){
        if(userNumber == 1){
            return "小白";
        }
        else if(userNumber == 2){
            return "小红";
        }
        else{
            return "未知";
        }
    }
    @ResponseBody
    @RequestMapping(value = "/save", method = RequestMethod.POST)
    @ApiOperation(value = "新增商品")
    public String save(){
        GoodsInfo goodsInfo = new GoodsInfo(System.currentTimeMillis(), "商品" + System.currentTimeMillis(), "这是一个测试商品");
        goodsRepository.save(goodsInfo);
        return "success";
    }

    @ResponseBody
    @RequestMapping(value = "/delete", method = RequestMethod.POST)
    @ApiOperation(value = "删除商品")
    @ApiImplicitParam(paramType="query", name = "id", value = "商品id", required = true, dataType = "long")
    public String delete(@RequestParam(required = true) long id){
        goodsRepository.deleteById(id);
        return "success";
    }

    @ResponseBody
    @RequestMapping(value = "/update", method = RequestMethod.POST)
    @ApiOperation(value = "更新商品")
    @ApiImplicitParam(paramType="query", name = "id", value = "商品id", required = true, dataType = "long")
    public String update(@RequestParam(required = true) long id,
                         @RequestParam(required = false) String name,
                         @RequestParam(required = false) String  description){
        Optional<GoodsInfo> goodsInfo = goodsRepository.findById(id);
        if(goodsInfo.isPresent()){
            if(name != null){
                goodsInfo.get().setName(name);
            }
            if(description != null){
                goodsInfo.get().setDescription(description);
            }
            goodsRepository.save(goodsInfo.get());
            return "success";
        }else{
            return "no find";
        }

    }

    @ResponseBody
    @RequestMapping(value = "/getOne", method = RequestMethod.GET)
    @ApiOperation(value = "得到一个商品")
    @ApiImplicitParam(paramType="query", name = "id", value = "商品id", required = true, dataType = "long")
    public Optional<GoodsInfo> getOne(@RequestParam(required = true) long id){
        Optional<GoodsInfo> goodsInfo = goodsRepository.findById(id);
        return goodsInfo;
    }

    private SearchQuery getEntitySearchQuery(int pageNumber, String searchContent){
        Pageable pageable =  PageRequest.of(pageNumber, 20);
        SearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(queryStringQuery(searchContent)).withPageable(pageable).build();
        return searchQuery;
    }

    @ResponseBody
    @RequestMapping(value = "/search", method = RequestMethod.GET)
    @ApiOperation(value = "搜索商品")
    public List<GoodsInfo> search(@RequestParam(required = true) Integer pageNumber, @RequestParam(required = true) String query){
        SearchQuery searchQuery = getEntitySearchQuery(pageNumber, query);
        Page<GoodsInfo> goodsPage = goodsRepository.search(searchQuery);
        return goodsPage.getContent();
    }

}

Spring boot 中使用ElasticSearch