[JAVA] Bearer token Authorization

bearer token 발급 후 사용자정보를 체크할 때 사용한다.

public static void userChk (HttpServletRequest request, String token) {
  Map<String, Object> returnList = new HashMap<String,Object>();
  HttpSession session = request.getSession();

  try{
      URL url = new URL({URL});

      HttpURLConnection conn = (HttpURLConnection) url.openConnection();

      conn.setRequestProperty("Authorization","Bearer " + token);
      conn.setRequestProperty("Content-Type","application/json");
      conn.setRequestMethod("POST");

      try(BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()))){
      String output;
      StringBuffer sb = new StringBuffer();
      while ((output = in.readLine()) != null) {
      	sb.append(output).append("\n");
  		}

      if(!sb.equals("")){
        returnList = new ObjectMapper().readValue(sb.toString(), new TypeReference<Map<String, Object>>(){});

      }
  }catch (Exception e) {
 	 e.printStackTrace();
  }

  }catch (Exception e){
    System.out.println("사용자정보가 없습니다");
    e.printStackTrace();
  }

}