Spring Boot 시작하기 - #6. MariaDb + Mybatis 연동

Spring Boot 시작하기

- #6. MariaDb + Mybatis 연동

이번장에서는 Database 연동에 대해 진행하겠습니다.

mariaDB는 미리 설치가 되어져 있어야됩니다.

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pom.xml 에 아래 내용 추가. 

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<dependency>     <groupId>org.springframework.boot</groupId>     <artifactId>spring-boot-starter-jdbc</artifactId> </dependency>       <dependency>     <groupId>org.mariadb.jdbc</groupId>     <artifactId>mariadb-java-client</artifactId>     <version>1.3.2</version> </dependency>   <dependency>     <groupId>org.mybatis</groupId>     <artifactId>mybatis</artifactId>     <version>3.3.0</version> </dependency>   <dependency>     <groupId>org.mybatis</groupId>     <artifactId>mybatis-spring</artifactId>     <version>1.2.3</version> </dependency>

# dependency 추가 후 이클립스에서 alt + F5를 실행하면 자동으로 jar파일들을 추가합니다.  ( 프로젝트 우클릭 -> maven -> Update Project.. )

application.properties내에 아래 내용 추가
db계정 / id , pw는 설치하신 MariaDB 정보 입력

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spring.datasource.driverClassName=org.mariadb.jdbc.Driver spring.datasource.url=jdbc:mariadb://localhost:3306/test spring.datasource.username=test spring.datasource.password=test

DatabaseConfig.java

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<p>package com.example;   import javax.sql.DataSource;   import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.transaction.annotation.EnableTransactionManagement;   @Configuration @MapperScan(basePackages="com.example.dao") @EnableTransactionManagement public class DatabaseConfig {       @Bean     public  SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {         final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();         sessionFactory.setDataSource(dataSource);         PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();         sessionFactory.setMapperLocations(resolver.getResources("classpath:com/example/dao/*.xml"));         return sessionFactory.getObject();     }          @Bean     public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) throws Exception {       final SqlSessionTemplate sqlSessionTemplate = new SqlSessionTemplate(sqlSessionFactory);       return sqlSessionTemplate;     }   } </p>

DbController.java

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package com.example.controller;   import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController;   import com.example.service.DbService;   @RestController public class DbController {     @Autowired     DbService dbService;           @RequestMapping("/")     public @ResponseBody String root_test() throws Exception{           return "Hello World";     }       @RequestMapping("/now")     public @ResponseBody String now() throws Exception{         return dbService.getDual();     } }

DbService.java

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package com.example.service;   import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;   import com.example.dao.DbMapper;   @Service public class DbService {       @Autowired     DbMapper dbMapper;       /* select dual */     public String getDual() throws Exception{         return dbMapper.getDual();     }   }

DbMapper.java

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package com.example.dao;   public interface DbMapper {     /* DB Select  */     public String getDual() throws Exception; }

Db.xml

src/main/resources/com/exmaple/dao/Db.xml 로 생성

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<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.example.dao.DbMapper">       <!-- /* select dual */ -->     <select id="getDual" resultType="java.lang.String">         SELECT NOW() FROM DUAL     </select>   </mapper>

결과화면

http://localhost/now

현재 시각이 출력되는 것을 볼 수 있습니다.

총 수정 / 추가파일은 아래그림과 같습니다.

# maraiDB 의 설치 및 연동은 따로 블로깅하도록 하겠습니다.