如何在Java中发布HTTPS post请求？ [重复]

这个问题在这里已有答案：

• “PKIX path building failed” and “unable to find valid certification path to requested target” 22个答案

我正在尝试发布HTTPS帖子请求 .

String url = "https://myhttpsurl.com"
URL myurl = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) myurl.openConnection();
con.setRequestMethod("POST");
String query = "confirmation_number=" + URLEncoder.encode(confNumber, "UTF-8");
con.setRequestProperty("Content-length",String.valueOf(query.length()));
con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
con.setDoOutput(true);
con.setDoInput(true);

DataOutputStream output = new DataOutputStream(con.getOutputStream());
output.writeBytes(query);

output.close();
System.out.println("Resp Code:"+con.getResponseCode());

我收到以下错误：

javax.net.ssl.SSLHandshakeException：sun.security.validator.ValidatorException：PKIX路径构建失败：sun.security.provider.certpath.SunCertPathBuilderException：无法在sun.security.ssl.Alerts找到所请求目标的有效证书路径 . get.SLException（Alerts.java:192）at sun.security.ssl.SSLSocketImpl.fatal（SSLSocketImpl.java:1904）at sun.security.ssl.Handshaker.fatalSE（Handshaker.java:279）at sun.security.ssl.Handshaker .fatalSE（Handshaker.java:273）at sun.security.ssl.ClientHandshaker.serverCertificate（ClientHandshaker.java:1446）at sun.security.ssl.ClientHandshaker.processMessage（ClientHandshaker.java:209）at sun.security.ssl . Handshaker.processLoop（Handshaker.java:913）at sun.security.ssl.Handshaker.process_record（Handshaker.java:849）at sun.security.ssl.SSLSocketImpl.readRecord（SSLSocketImpl.java:1023）at sun.security.ssl .SSLSocketImpl.performInitialHandshake（SSLSocketImpl.java:1332）at sun.security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1359）at sun .security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1343）at sun.net.www.protocol.https.HttpsClient.afterConnect（HttpsClient.java:559）at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect （AbstractDelegateHttpsURLConnection.java:185）at sun.net.www.protocol.http.HttpURLConnection.getOutputStream（HttpURLConnection.java:1092）at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream（HttpsURLConnectionImpl.java:250）

请提出导致错误的原因