[Spring Boot] Controller 생성

0. Controller

 

Controller는 클라이언트로부터 들어온 요청을 알맞은 Service로 연결하고 응답을 보내주는 역할을 한다.

 

다음은 Get, Post, Put, Delete 방식을 사용한 RestController이다.

 

package com.web.springtest00.product.controller;


import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
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.web.springtest00.data.dto.ChangedProductNameDto;
import com.web.springtest00.data.dto.ProductDto;
import com.web.springtest00.data.dto.ProductResponseDto;
import com.web.springtest00.product.service.ProductService;

@RestController
@RequestMapping("/product")
public class ProductController {

    private final ProductService productService;

    public ProductController(ProductService productService){
        this.productService = productService;
    }

    @GetMapping("/{number}")
    public ResponseEntity<ProductResponseDto> getProduct(@PathVariable Long number){
        ProductResponseDto productResponseDto = productService.getProduct(number);
        return ResponseEntity.status(HttpStatus.OK).body(productResponseDto);
    }

    @PostMapping()
    public ResponseEntity<ProductResponseDto> createProduct(@RequestBody ProductDto productDto){
        ProductResponseDto productResponseDto = productService.saveProduct(productDto);
        return ResponseEntity.status(HttpStatus.OK).body(productResponseDto);
    }

    @PutMapping()
    public ResponseEntity<ProductResponseDto> changeProductName(@RequestBody ChangedProductNameDto changeProductNameDto) throws Exception{
        ProductResponseDto productResponseDto = productService.changeProductName(changeProductNameDto.getNumber(), changeProductNameDto.getName());
        return ResponseEntity.status(HttpStatus.OK).body(productResponseDto);
    }

    @DeleteMapping()
    public ResponseEntity<String> deleteProduct(Long number) throws Exception{
        productService.deleteProduct(number);
        return ResponseEntity.status(HttpStatus.OK).body("정상적으로 삭제되었습니다.");
    }

}