[Project2][Springboot] 초기설정

 

sts를 사용해서

 

 

프로젝트 만들기

 

다음에 위와 같이 패키지 & 클래스 만들어준다.

 

• SpringbootBackApplication.java

package com.jiyeon.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringbootBackApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringbootBackApplication.class, args);
	}

}

가장 상위 클래스이다. 스프링부트를 실행할 때 사용되는 클래스. @SpringbootApplication어노테이션을 붙여주면서 적용한다.

 

• GoodsController.java

package com.jiyeon.springboot.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.jiyeon.springboot.exception.ResourceNotFoundException;
import com.jiyeon.springboot.model.Goods;
import com.jiyeon.springboot.repository.GoodsRepository;

@CrossOrigin(origins = "http://localhost:3000")
@RestController
@RequestMapping("/api/v1/")
public class GoodsController {
	
	@Autowired
	private GoodsRepository goodsrepository;
	
	//list
	@GetMapping("/goods")
	public List<Goods> getAllGoods(){
		return goodsrepository.findAll();
	}
	
	//create
	@PostMapping("/goods")
	public Goods createGoods(@RequestBody Goods goods) {
		return goodsrepository.save(goods);
	}
	
	//get by id rest api
	@GetMapping("/goods/{id}")
	public ResponseEntity<Goods> getGoodsById(@PathVariable Long id) {
		Goods goods = goodsrepository.findById(id)
				.orElseThrow(() -> new ResourceNotFoundException("goods not exist id : "+id));
		return ResponseEntity.ok(goods);	
	}
	
	//update
	@PutMapping("/update-goods/{id}")
	public ResponseEntity<Goods> updateGoods(@PathVariable Long id, @RequestBody Goods goodsDetails){
		
		Goods goods = goodsrepository.findById(id)
				.orElseThrow(() -> new ResourceNotFoundException("goods not exist id : "+id));
		goods.setName(goodsDetails.getName());
		goods.setCompany(goodsDetails.getCompany());
		goods.setPrice(goodsDetails.getPrice());
		
		Goods updatedGoods = goodsrepository.save(goods);
		return ResponseEntity.ok(updatedGoods);
	}
	
	//delete
	@DeleteMapping("/delete-goods/{id}")
	public ResponseEntity<Map<String, Boolean>> deleteGoods(@PathVariable Long id){
		Goods goods = goodsrepository.findById(id)
				.orElseThrow(() -> new ResourceNotFoundException("goods not exist id : "+id));
		
		goodsrepository.delete(goods);
		Map<String, Boolean> response = new HashMap<>();
		response.put("deleted", Boolean.TRUE);
		return ResponseEntity.ok(response);
	
	}

}

• 스프링의 컨트롤러같은 클래스이다. 이런 거 몇 개 더 만들면 카테고리 생성도 가능하겠음
• 스프링 만들 때랑 나머지는 다 비슷한데 @CrossOrigin 어노테이션은 리액트랑 연결할 때 사용된 것.

 

• ResourceNotFoundException.java

package com.jiyeon.springboot.exception;

import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ResponseStatus;


@ResponseStatus(value=HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException{

	private static final long serialVersionUID = 1L;
	
	public ResourceNotFoundException(String message) {
		super(message);
	}
	
}

• 예외처리 전문 클래스

 

 

• Goods.java

package com.jiyeon.springboot.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="goods")
public class Goods {
	
	@Id
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	private Long id;
	
	@Column
	private String name;
	
	@Column
	private String company;
	
	@Column
	private double price;
	
	public Goods() {
		
	}
	
	public Goods(String name, String company, double price) {
		super();
		this.name = name;
		this.company = company;
		this.price = price;
	}
	
	public Long getId() {
		return id;
	}
	public void setId(Long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getCompany() {
		return company;
	}
	public void setCompany(String company) {
		this.company = company;
	}
	public double getPrice() {
		return price;
	}
	public void setPrice(double price) {
		this.price = price;
	}
	

}

• 엔티티 클래스 @Entity
• Setter Getter 생성자 만든다. (vo처럼)
• 어떤 테이블에서 무슨 역할하는지까지 정해주고 나중에 불러올 때도 자동으로 인식한다.

 

• GoodsReposiroty

package com.jiyeon.springboot.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import com.jiyeon.springboot.model.Goods;

@Repository
public interface GoodsRepository extends JpaRepository<Goods, Long>{

}

• JPA를 사용할 수 있게해 줌 - sql문없이 자동인식해서 실행하게 해줌

 

 

• application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/goods_management_system?useSSL=false
spring.datasource.username=root
spring.datasource.password=mysql

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

spring.jpa.hibernate.ddl-auto=update

• db연결 시 설정값. root-context에서 했던 역할들
• mysql 써서 문법에 맞게 포트번호와 username password 등 맞춰줌