REST with Spring Boot 2

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Hello, REST!

Spring Boot 創建 REST API 的方法

創一個 Class
Class 上面加上 @RestController 的 annotation
Class 裡面創一個 public method
Method 上面加上 @RequestMapping 的 annotation
替 @RequestMapping 加上 REST API 的設定
- value: URL 位址，例如 "/hello"
- produces: 回傳的類型，例如回傳 JSON 的話就填上 MediaType.APPLICATION_JSON_VALUE
- method: Request 的 method，例如 GET 的話就寫 RequestMethod.GET
這個 method 回傳的 Java POJO，就會自動被轉換成對應的 JSON 並回傳

下面的練習，請試著回傳一個 Java POJO，並在 answer 裡面填上 "Hello, REST!"

Complete the controller to say "Hello, REST!"

// {
package com.example.training.rest;
import com.example.training.to.RestQuiz01Response;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
//}
@RestController
public class QuizController01 {
    @RequestMapping(value = "/restQuiz01", produces = MediaType.APPLICATION_JSON_VALUE, method = RequestMethod.GET)
    public RestQuiz01Response restQuiz01() {
        // TODO: Please return JSON with {"answer": "Hello, REST!"}
        RestQuiz01Response result = new RestQuiz01Response();
        result.setAnswer("5566 Never Dies.");
        return result;
    }
}

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