[java] spring boot maven: mongoDB 연동하기

 

 

1. pom.xml dependencies에 몽고DB를 추가해줍니다.

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

 

 

2. application.properties에 몽고DB 접속정보를 작성합니다.

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.authentication-database=admin
spring.data.mongodb.database=database
spring.data.mongodb.username=name
spring.data.mongodb.password=password

 

 

3. 몽고DB 연동

config.java파일을 하나 만들어서, 몽고DB를 임포트합니다.

 

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.MongoDatabaseFactory;
import org.springframework.data.mongodb.core.convert.DbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

@Configuration
public class WebConfig {

    @Bean
    public MappingMongoConverter mappingMongoConverter(
            MongoDatabaseFactory mongoDatabaseFactory,
            MongoMappingContext mongoMappingContext
    ) {
        DbRefResolver dbRefResolver = new DefaultDbRefResolver(mongoDatabaseFactory);
        MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, mongoMappingContext);
        converter.setTypeMapper(new DefaultMongoTypeMapper(null));
        return converter;
    }
}

 

임포트 에러가 난다면 install과 update를 진행해준 후 임포트 해주면 됩니다.

Run As > Maven install

Maven > Update Project...

 

 

spring boot를 run했을 때 아래와 같이 mongodb쪽에 Opened connection이 나오면 정상적으로 연동된 것입니다.

 

 

 

4. 데이터 호출하기

mongoTemplate를 사용하여 데이터를 호출합니다.

mongoTemplate는 도큐먼트 클래스를 무조건 만들어준 후에 find로 받아올 수 있습니다.

아래 블로그를 참고!

https://gofnrk.tistory.com/38

Spring Boot MongoDB 연동

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

public class mongoDBfind {

    @Autowired
    MongoTemplate mongoTemplate;
    
    public void find() {
    	List<Map> data = mongoTemplate.find(Query.query(Criteria.where("과일").is("사과")), entity.class);
    }
}

 

 

끝!