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[Java] JAVA SPRING BOOT 기초

학학이 2020. 2. 27. 19:00
[Java] JAVA SPRING BOOT 기초

2019.10.26 양재동 코드랩 JAVA SPRING BOOT 기초 #2의 정리

https://github.com/SangHakLee/codelab-spring-boot

  • Embeded Tomcat 이용한 단독 실행

  • Spring Actuator: 모니터링과 관리

DB setting

create database codelab_db default character set utf8;
grant all privileges on codelab_db.* to codelab@localhost identified by 'codelab';
flush privileges;

오류

You must reset your password using ALTER USER statement before executing this statement.
mysql> set password = password('PASSWORD');

https://kogun82.tistory.com/122

실습 1

IntelliJ

  1. Create Project - Spring initializr

  2. New Project

  3. Dependencies

    1. Dev Tools - lombok

    2. WEB - Spring Web

    3. SQL - Spring Data JPA, MySQL Driver

DB 연결 정보 셋팅

  1. src - main - resources

    1. application.properties 삭제

    2. application.yml 만들기

      spring:
      datasource:
      url: jdbc:mysql://127.0.0.1:3306/codelab_db?serverTimezone=Asia/Seoul&useSSL=false&characterEncoding=utf-8
      username: codelab
      password: codelab
      driver-class-name: com.mysql.jdbc.Driver
      jpa:
      hibernate:
      ddl-auto: update # 없으면 만들고 있으면 그대로 사용
      show-sql: true # mysql debug mode, 실제 쿼리가 로그로 보임
      database-platform: org.hibernate.dialect.MySQL5InnoDBDialect
      properties:
      hibernate: # custom options
      format_sql: true # sql 로그를 포매팅해서 보여줌
      logging:
      level:
      org.hibernate.type: trace # bind 쿼리의 내용까지 출력. ? 부분이 실제 값으로 표현됨
      server:
      port: 8080

  • ddl-auto

    • update: 없으면 만들고 있으면 그대로 사용

    • create: 무조건 새로 만듦

기본 컨트롤러 작성

  1. src - main - java - kr.codelabs.member

    1. package: controller

    2. class: MyController

      1. @RestController

      2. @GetMapping

RUN!!

실습 2

DB

  1. src - main - java - kr.codelabs.member

  2. Department

    1. package: entity

    2. class: Department

      1. @Entity

      2. @Table

      3. @Getter

  3. DepartmentRepository

    1. package: repository

    2. interface: DepartmentRepository

  4. DepartmentService

    1. package: service

    2. interface: DepartmentService

  5. DepartmentController

    1. package: controller

    2. class: DepartmentController

CRUD

GET

  • @PathVariable

  • @RequestParam

POST

  • @RequestBody

Member

Swagger

https://mvnrepository.com/artifact/io.springfox/springfox-swagger2

1. dependency 추가

pom.xml

<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>

config

  1. package: config

  2. class: SwaggerConfig

  3. ApiOperation (각 컨트롤러)

swagger-ui

http://127.0.0.1:8080/swagger-ui.html

OAuth 인증 서버 구현

DB

src - main - resources
/data.sql
/schema.sql

application.yml

initialization-mode: always # spring 구동 시 resources 하위 .sql 실행
continue-on-error: true # 에러나도 실행. 개발에서만 사용

API 서버

pom.xml

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-oauth2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-security</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
  • dependency

    • spring-cloud-starter-oauth2

    • spring-cloud-starter-security

  • dependencyManagement

  • repositories

Spring Boot Actuator

https://www.baeldung.com/spring-boot-actuators

jconsole

$ jconsole

배포

사전에 maven 설치

$ mvn package
$ cd target # .jar 파일이 생성됨
$ java -jar NAME.jar

zard21@gmail.com

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