我需要该应用程序来显示我当前的 IP 地址。
在本例中,我们有类似的内容(获取请求)
我需要从这里获取IP
public class Main {
public static void main(String[] args) throws Exception {
String url = "http://2ip.ru/";
URL obj = new URL(url);
HttpURLConnection connection = (HttpURLConnection) obj.openConnection();
connection.setRequestMethod("GET");
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
}
}
最佳答案
您可以尝试回答这个问题: How to get Cookies with HttpURLConnection in Java?
或者从 header 中提取 cookie。示例(Source):
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class GetCookiesFromHTTPConnection {
public static void main(String[] args) throws Exception {
URL url = new URL("http://www.google.com:80");
URLConnection conn = url.openConnection();
Map<String, List<String>> headerFields = conn.getHeaderFields();
Set<String> headerFieldsSet = headerFields.keySet();
Iterator<String> hearerFieldsIter = headerFieldsSet.iterator();
while (hearerFieldsIter.hasNext()) {
String headerFieldKey = hearerFieldsIter.next();
if ("Set-Cookie".equalsIgnoreCase(headerFieldKey)) {
List<String> headerFieldValue = headerFields.get(headerFieldKey);
for (String headerValue : headerFieldValue) {
System.out.println("Cookie Found...");
String[] fields = headerValue.split(";\s*");
String cookieValue = fields[0];
String expires = null;
String path = null;
String domain = null;
boolean secure = false;
// Parse each field
for (int j = 1; j < fields.length; j++) {
if ("secure".equalsIgnoreCase(fields[j])) {
secure = true;
}
else if (fields[j].indexOf('=') > 0) {
String[] f = fields[j].split("=");
if ("expires".equalsIgnoreCase(f[0])) {
expires = f[1];
}
else if ("domain".equalsIgnoreCase(f[0])) {
domain = f[1];
}
else if ("path".equalsIgnoreCase(f[0])) {
path = f[1];
}
}
}
System.out.println("cookieValue:" + cookieValue);
System.out.println("expires:" + expires);
System.out.println("path:" + path);
System.out.println("domain:" + domain);
System.out.println("secure:" + secure);
System.out.println("*****************************************");
}
}
}
}
}
关于java - 如何获取 "Set-Cookie:"值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57452956/