SpringBoot整合Elasticsearch

一、SpringBoot整合Elasticsearch

SpringBoot整合Elasticsearch非常简单，Elasticsearch实现了JPA接口，我们只需要引入Elasticsearch的Maven依赖，然后像使用JPA那样操作即可。

1. Maven依赖

	org.springframework.boot
	spring-boot-starter-parent
	2.0.0.RELEASE
	 


	
		org.springframework.boot
		spring-boot-starter-web
	
	
	
	
		org.springframework.boot
		spring-boot-starter-data-elasticsearch
	
	
	
	
		org.projectlombok
		lombok
	

application.yml 配置

spring:
  data:
    elasticsearch:
      # 集群名称（默认名称elasticsearch, 可以在elasticsearch.yml文件中配置)
      cluster-name: elasticsearch
      # elasticsearch地址（注意：端口号为9300）
      cluster-nodes: 192.168.2.104:9300

2. 实体类

package com.example.demo.entity;

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

/**
 * ES操作实体类
 * indexName：索引名称
 * type: 索引类型
 */
@Document(indexName = "myindex",type = "user")
@Data
public class UserEntity {
    private String id;
    private String name;
    private Integer sex;
    private Integer age;
}

3. DAO层（跟JPA操作一样）

package com.example.demo.repository;

import com.example.demo.entity.UserEntity;
import org.springframework.data.repository.CrudRepository;

public interface UserRepository extends CrudRepository {
}

5. Controller层

package com.example.demo.controller;

import com.example.demo.entity.UserEntity;
import com.example.demo.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Optional;

@RestController
public class UserController {
    @Autowired
    private UserRepository userRepository;

    /**
     * 添加User
     * @param user
     * @return
     */
    @RequestMapping("/addUser")
    public UserEntity addUser(@RequestBody UserEntity user){
        return userRepository.save(user);
    }

    /**
     * 根据id查找user
     * @param id 
     * @return
     */
    @RequestMapping("/findUser")
    public Optional getUser(String id){
       return userRepository.findById(id);
    }
}

6. 启动类

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;

@EnableElasticsearchRepositories(basePackages = "com.example.demo.repository") // 扫包
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

二、测试

添加用户接口 http://localhost:8080/addUser

获取用户接口 http://localhost:8080/findUser?id=2

是不是发现SpringBoot整合Elasticsearch超简单，soeasy ~~~