JAVA 使用 HttpsURLConnection

一個簡單的java https client 範例

public String sendHTTPS(String url, String queryStr, String host, int port) {
	String ret = "";
	String USER_AGENT = "Mozilla/5.0";
	String httpsURL = "https://"+host + url;
	try {
		URL myUrl = new URL(httpsURL);
		HttpsURLConnection conn;
		conn = (HttpsURLConnection)myUrl.openConnection();
		conn.setRequestMethod("POST");
		conn.setRequestProperty("User-Agent", USER_AGENT);
		conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
		try {
			String urlParameters = queryStr;
			conn.setDoOutput(true);
			DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
			wr.writeBytes(urlParameters);
			wr.flush();
			wr.close();
			InputStream is = conn.getInputStream();
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader br = new BufferedReader(isr);
			String inputLine;
			while ((inputLine = br.readLine()) != null) {
				ret += inputLine;
			}
			br.close();
			System.out.println("SendHTTPS  response: "+ret );
		} catch (Exception e) {
			e.printStackTrace();
		}
	} catch (IOException e) {
		e.printStackTrace();
	}
	return ret;
}

使用方式
sendHTTPS("/ok.php" ,"query=something" ,"127.0.0.1" ,443);

相當於使用瀏覽器打開 https://127.0.0.1/ok.php 並挾帶 POST 資訊 query=something