java获取token的方法

Question

我是 JWT 的新手，所以我需要从 webService（GET 方法）获取带有 JAVA 代码的令牌。

在 postMan 中，我能够获得令牌（在屏幕截图下方）。

我使用了这个 java 代码，但经常返回 Response Code : 403

String url = "https://WEBSERVICE_LINK";
    try {
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        con.setRequestMethod("GET");
        this.log.info("Sending 'GET' request to URL : " + url);

        con.setRequestProperty("Authorization", Base64.getEncoder().encodeToString((username + ":" + pwd).getBytes()));

        con.setRequestProperty("Accept", "application/json");
        int responseCode = con.getResponseCode();
        this.log.info("Response Code : " + responseCode);

        StringBuilder response;
        try (BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()))) {
            String inputLine;
            response = new StringBuilder();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
        }

        String reponseString = response.toString();
        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode jsonNode = objectMapper.readTree(reponseString);

        // Isoler et transmettre le Token
        this.token = jsonNode.get("token") != null ? jsonNode.get("token").asText() : null;
        this.log.info("Token : " + this.token);

谢谢

Answer 1

您似乎忘记了 Authorization 标头值中的 Basic 前缀：

con.setRequestProperty(
  "Authorization",
  "Basic " + Base64.getEncoder().encodeToString((username + ":" + pwd).getBytes())
);