Web API

• REST의 HATEOAS와 자체 표현 구조 등 REST API 아키텍처 스타일을 완벽하게 구현하지 못한 API를 의미

Web API 실습

1) PlusResult DTO 클래스 생성

package kr.or.connect.mvcexam.dto;

public class PlusResult {
	private int value1;
	private int value2;
	private int result;
	public int getValue1() {
		return value1;
	}
	public void setValue1(int value1) {
		this.value1 = value1;
	}
	public int getValue2() {
		return value2;
	}
	public void setValue2(int value2) {
		this.value2 = value2;
	}
	public int getResult() {
		return result;
	}
	public void setResult(int result) {
		this.result = result;
	}
}

2) PlusApiController 클래스 생성

package kr.or.connect.mvcexam.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import kr.or.connect.mvcexam.dto.PlusResult;

@Controller
public class PlusApiController {
	@GetMapping("/api/plus")
	@ResponseBody // view 이름 대신 return한 객체를 출력하라는 의미
	public PlusResult plus(@RequestParam("value1") int value1, @RequestParam("value2")int value2) {
		PlusResult plusResult = new PlusResult();
		plusResult.setValue1(value1);
		plusResult.setValue2(value2);
		plusResult.setResult(value1+value2);
		return plusResult;
	}

}

3) json 변환을 위해 pom.xml 파일 업데이트

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.10.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.10.2</version>
        </dependency>

4) http://localhost:8080/mvcexam/api/plus?value1=10&value2=20 URL을 이용해 접속