java - 服务器返回 java.io.IOException : Server returned HTTP response code: 400 for URL

Question

我正在尝试调用rest API，其记录如下

curl -X POST "https://url/api/v1/className/doSomething" -H "accept: application/json" -H "Authorization: Bearer token" -H "Content-Type: application/json" -d

这是我的代码发送http post。它适用于我之前使用过的所有 http api，但不适用于此。

        String result = "";

        RequestProcess process = LogManager.getInstance().newProcess();
        process.setProcessName(url);
        process.setRequestContent(requestContent);

        ObjectMapper mapper = new ObjectMapper().registerModule(new Jdk8Module()).registerModule(new JavaTimeModule());


        String rawData = mapper.writeValueAsString(requestContent);

        String charset = "UTF-8";
        HttpURLConnection connection = (HttpURLConnection)new URL(url).openConnection();
        connection.setDoOutput(true);
        connection.setRequestProperty("Accept-Charset", charset);
        connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);
        connection.setRequestProperty("User-Agent", USER_AGENT);
        connection.setRequestMethod("POST");

        try (OutputStream output = connection.getOutputStream()) {
            output.write(rawData.getBytes(charset));
        }

        InputStream inputStream = connection.getInputStream();
        result = StreamUtil.toString(inputStream);

        process.setResponseContent(result);
        LogManager.getInstance().endProcess(process);

        return result;

我收到错误

java.io.IOException:服务器返回 HTTP 响应代码:400 对于 URL:url

我尝试从 postman 那里做同样的事情，它有效。有什么想法吗？

Answer 1

您发送什么数据？至少你应该发送 -d {} 来获取空数据或删除 -d