프로젝트 의존성 추가

• lombok
• Spring Web
• Spring Security
• OAuth2 Client
• Spring Data JPA
• MySQL Driver

JWT 의존성 추가 - 0.12.3버전

 		implementation 'io.jsonwebtoken:jjwt-api:0.12.3'
    implementation 'io.jsonwebtoken:jjwt-impl:0.12.3'
    implementation 'io.jsonwebtoken:jjwt-jackson:0.12.3'

MainController

package com.sample.oauthjwt.controller;

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

@Controller
public class MainController {

    @GetMapping("/")
    @ResponseBody
    public String mainAPI() {

        return "main route";
    }
}

MyController

package com.sample.oauthjwt.controller;

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

@Controller
public class MyController {

    @GetMapping("/my")
    @ResponseBody
    public String myAPI() {

        return "my route";
    }
}