JPA

1. 로컬 환경에 PostgreSQL 설치https://www.postgresql.org/ PostgreSQLThe world's most advanced open source database.www.postgresql.org  2. Spring Boot, JPA, PostgreSqla. 의존성 추가implementation 'org.springframework.boot:spring-boot-starter-data-jpa'runtimeOnly 'org.postgresql:postgresql'Spring Data JPA, PostgreSQL Driver 추가 b. application.ymlspring: datasource: driver-class-name: o..