Spring Bootを触ってみた
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Spring Boot is a framework for building Java applications. It is built on top of Spring and includes features such as embedded Tomcat, Jetty, or Undertow servers and automatic configuration to simplify development. Spring Initializr can be used to set up Spring Boot projects with common dependencies using Maven or Gradle. It allows generating a basic "Hello World" application quickly. Spring Boot applications can also use Spring Data JPA to easily interact with databases and auto-configuration to simplify app configuration.
Spring Bootを触ってみた
- 2. Spring Boot • • Play Framework • Spring • Play Scala Scala
- 3. Spring Boot • Spring Framework • Spring Framework
- 4. • Tomcat Jetty jar(Uber JAR) • Maven Gradle • ( )
- 5. Spring Initializr • Spring Boot WEB
- 6. Spring Initializr • Project ( Maven Gradle ) • STS(Spring Tool Suite)
- 12. Hello World! Dependencies Web Project
- 13. Hello World! Eclipse “Hello World!!” package com.example; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller public class HelloController { @RequestMapping("/") @ResponseBody public String hello(){ return "Hello World!!"; } }
- 15. • Spring Boot Spring • Web Spring MVC •
- 16. • Spring Boot • • • https://github.com/spring-projects/spring-boot/tree/ master/spring-boot-samples
- 17. AutoConfigure • Spring Boot AutoConfigure • AutoConfigure
- 19. DB • • Spring JDBC • Spring DATA JPA • MyBatis Spring
- 20. Spring JDBC • spring-boot-starter-jdbc • JDBC (Apache commons DbUtils )
- 21. Spring JDBC @Repository public class CustomerRepository { @Autowired private NamedParameterJdbcTemplate jdbcTemplate; public List<Customer> findAll() { return jdbcTemplate.query( "SELECT * FROM customers ORDER BY id", new BeanPropertyRowMapper<Customer>(Customer.class)); } public void update(Customer customer) { jdbcTemplate.update( "UPDATE customers SET name = :name, address = :address WHERE id = :id", new BeanPropertySqlParameterSource(customer)); } }
- 22. Spring DATA JPA • spring-boot-starter-data-jpa • JPA • JPA EntityManager Interface
- 23. Spring DATA JPA @Entity @Table(name = "customers") @Data @AllArgsConstructor @NoArgsConstructor public class Customer { @Id @GeneratedValue private Integer id; private String name; private String address; }
- 24. Spring DATA JPA @Service public class CustomerService { @Autowired private CustomerRepository customerRepository; public List<Customer> findAll() { return customerRepository.findAll(); } public List<Customer> findByName(String name) { return customerRepository.findByName(name); } public Customer create(Customer customer) { return customerRepository.save(customer); } @Repository public interface CustomerRepository extends JpaRepository<Customer, Integer> { public List<Customer> findByName(String name); }
- 25. REST API • CRUD API • RDBMS H2 • Spring DATA JPA • Flyway DB • Swagger
- 27. • Spring •