[인프런 워밍업 클럽 1기] 과제 2 - API 만들어보기

Get API, Post API 만들어보기 

문제 1

문제 1 답안 

Controller

@GetMapping("/api/v1/calc")
public CalcResponse calc(@RequestParam int num1, @RequestParam int num2) {
    return new CalcResponse(num1, num2);
}

ResponseDTO

@Getter
public class CalcResponse {

    private int add;
    private int minus;
    private int multiply;

    public CalcResponse(int num1, int num2) {
        this.add = num1 + num2;
        this.minus = num1 - num2;
        this.multiply = num1 * num2;
    }
}

API 호출 테스트

 

문제2

 

문제2 답안

Contoller

@GetMapping("/api/v1/day-of-the-week")
public DateResponse dayOfWeek(@RequestParam("date") String date) {
    LocalDate localDate = LocalDate.parse(date);
    DayOfWeek dayOfWeek = localDate.getDayOfWeek();
    return new DateResponse(dayOfWeek.toString().substring(0,3));
}

ResponseDTO

@Getter
public class DateResponse {

    private String dayOfTheWeek;

    public DateResponse(String dayOfTheWeek) {
        this.dayOfTheWeek = dayOfTheWeek;
    }
}

호출 테스트

 

문제3

 

문제3 답안 

Contoroller

@PostMapping("/api/v1/sum")
public int sum(@RequestBody NumberRequest request) {
    return request.getNumbers().stream().mapToInt(Integer::intValue).sum();
}

RequestDTO

@Getter
public class NumberRequest {
    private List<Integer> numbers;
}

 

호출 테스트