[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

• 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

• http://localhost:8080/actuator/health

• http://localhost:8080/actuator/env

jconsole

$ jconsole

배포

사전에 maven 설치

$ mvn package

$ cd target # .jar 파일이 생성됨

$ java -jar NAME.jar

zard21@gmail.com