import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
public class HttpPostExample {
public static void main(String[] args) {
try {
String url = "http://example.com/api/endpoint";
URL obj = new URL(url);
HttpURLConnection connection = (HttpURLConnection) obj.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("User-Agent", "Mozilla/5.0");
Map<String, String> parameters = new HashMap<>();
parameters.put("key1", "value1");
parameters.put("key2", "value2");
StringBuilder postData = new StringBuilder();
for (Map.Entry<String, String> param : parameters.entrySet()) {
if (postData.length() != 0) postData.append('&');
postData.append(param.getKey());
postData.append('=');
postData.append(param.getValue());
}
connection.setDoOutput(true);
connection.getOutputStream().write(postData.toString().getBytes("UTF-8"));
int responseCode = connection.getResponseCode();
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
StringBuilder response = new StringBuilder();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
