HTTP响应头-如何从HTTP响应头java中检索特定值

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");

int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
    // 获取响应头
    Map<String, List<String>> headers = connection.getHeaderFields();
    // 进一步处理响应头
}

// 获取所有响应头的键值对
for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
    String key = entry.getKey();
    List<String> values = entry.getValue();
    System.out.println(key + ": " + values);
}

// 检索特定响应头的值
String contentType = connection.getHeaderField("Content-Type");
System.out.println("Content-Type: " + contentType);