ES003-SpringBoot整合Elasticsearch

1 maven依赖

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<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>2.1.7.RELEASE</version>
	<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependencies>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
	</dependency>
	<dependency>
		<groupId>org.projectlombok</groupId>
		<artifactId>lombok</artifactId>
	</dependency>
</dependencies>

 

2 application.yml

spring:
    data:
elasticsearch:
    # (注意：需要在es项目启动前，修改配置文件elasticsearch.yml中的cluster-name属性，配置文件中默认这个属性是不配置的，否则在启动本项目时会报错)
    cluster-name: myes # 集群名称
    cluster-nodes: 192.168.170.128:9300 # 地址

 

3 实体类层

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package com.rain.entity;

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

@Document(indexName = "mytest", type = "user")
@Data
public class UserEntity {
    @Id
    private String id;
    private String name;
    private Integer age;
    private Integer sex;
}

 

4 Dao层

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package com.rain.repository;

import com.rain.entity.UserEntity;
import org.springframework.data.repository.CrudRepository;

public interface UserDao extends CrudRepository<UserEntity, String> {
}

 

5 Controller层

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package com.rain.controller;

import com.rain.entity.UserEntity;
import com.rain.repository.UserDao;
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 ESController {

    @Autowired
    private UserDao userDao;

    // 添加文档
    @RequestMapping("/addUser")
    public void addUser(@RequestBody UserEntity userEntity){
        userDao.save(userEntity);
    }

    // 查询文档
    public Optional<UserEntity> findById(String id){
        return userDao.findById(id);
    }

}

 

6 启动项目类

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

@SpringBootApplication
@EnableElasticsearchRepositories(basePackages = "com.rain.repository")
public class ESApplication {
    public static void main(String[] args) {
        SpringApplication.run(ESApplication.class);
    }
}

 

7 报错解决

以下错误：

None of the configured nodes are available:

解决方案:

Vi /usr/local/elasticsearch-6.4.3/config/elasticsearch.yml

cluster.name: myes