java 访问https协议时报错

public static void main(String args[])
{

URL url = null;
HttpURLConnection conn = null;
String region="";
String inputLine="";
try {
url = new URL("https://XXXXXXXXXXXXXXXXXXXXXXXXXXXXX?");
conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.getOutputStream().write("order_id=XXXXX&uid=XXXXXX&price=XXXXXX&product_name=XXXXXXXXX&checksum=XXXXXXXXXXXX".getBytes());
conn.getOutputStream().flush();
conn.getOutputStream().close();
int code = conn.getResponseCode();

BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
inputLine = in.readLine();
System.out.println("inputLine="+inputLine);
in.close();

} catch (Exception e) {
inputLine="";
e.printStackTrace();
} finally {
if (conn != null)
conn.disconnect();
}



运行时报错：

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1611)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:187)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:181)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1035)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:124)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:516)
at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:454)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:884)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1112)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1139)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1123)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:418)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:166)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:896)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:230)
at com.ifree.base.TestServlet.main(TestServlet.java:29)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:285)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:191)
at sun.security.validator.Validator.validate(Validator.java:218)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1014)
... 12 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:280)
... 18 more



请问一下这个怎么解决啊。。。。。。。感谢各位大侠帮忙解决一下 java path exception url --------------------编程问答-------------------- 证书的问题，google下，应该有解决方案。搜这个sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target --------------------编程问答-------------------- HttpClient httpclient = new DefaultHttpClient();
KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream keystoreInstream = new FileInputStream(new File(kpath));
FileInputStream trustStoreInstream = new FileInputStream(new File(trustpath));
try {
keystore.load(keystoreInstream, kpassword.toCharArray());
trustStore.load(trustStoreInstream, tpassword.toCharArray());
} finally {
keystoreInstream.close();
trustStoreInstream.close();
}
SSLSocketFactory socketFactory = new SSLSocketFactory(SSLSocketFactory.SSL, keystore, kpassword,
trustStore, null, new TrustStrategy() {
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
}, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
Scheme sch = new Scheme("https", 4433, socketFactory);
httpclient.getConnectionManager().getSchemeRegistry().register(sch);
HttpPost post = new HttpPost(url);
if(data!=null){
for(String key : data.keySet()) {
post.setHeader(key, data.get(key));
}
}
String BK_SERIAL = String.valueOf(System.currentTimeMillis());
StringEntity entity = new StringEntity(datafile, "text/html", "GBK");
post.setEntity(entity);
HttpResponse res = httpclient.execute(post);
String msg="";
HttpEntity resEntity = res.getEntity();
if (resEntity != null) {
msg=EntityUtils.toString(resEntity,"gbk");
}
httpclient.getConnectionManager().shutdown();
return msg; --------------------编程问答-------------------- --------------------编程问答-------------------- import java.io.*;
import java.net.*;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.*;

public class TrustSSL {
private static class TrustAnyTrustManager implements X509TrustManager {

public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}

public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}

public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[] {};
}
}

private static class TrustAnyHostnameVerifier implements HostnameVerifier {
public boolean verify(String hostname, SSLSession session) {
return true;
}
}

public static void main(String[] args) throws Exception {
InputStream in = null;
OutputStream out = null;
byte[] buffer = new byte[4096];
String str_return = "";
try {
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },new java.security.SecureRandom());
URL console = new URL("你访问的地址");
HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
conn.setSSLSocketFactory(sc.getSocketFactory());
conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
conn.connect();
InputStream is = conn.getInputStream();
DataInputStream indata = new DataInputStream(is);
String ret = "";

while (ret != null) {
ret = indata.readLine();
if (ret != null && !ret.trim().equals("")) {
str_return = str_return + ret;
}
}
conn.disconnect();
} catch (ConnectException e) {
System.out.println("ConnectException");
System.out.println(e);
throw e;

} catch (IOException e) {
System.out.println("IOException");
System.out.println(e);
throw e;

} finally {
try {
in.close();
} catch (Exception e) {
}
try {
out.close();
} catch (Exception e) {
}
}
System.out.println(str_return);
}
}


这样就能访问https协议的地址了

补充：Java ,  Web 开发