Java 는 모든 SSL 인증 서 를 신뢰 합 니 다(PKIX path building failed 문제 해결)

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
public class SslUtils {
	private static void trustAllHttpsCertificates() throws Exception {
		TrustManager[] trustAllCerts = new TrustManager[1];
		TrustManager tm = new miTM();
		trustAllCerts[0] = tm;
		SSLContext sc = SSLContext.getInstance("SSL");
		sc.init(null, trustAllCerts, null);
		HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
	}
	static class miTM implements TrustManager,X509TrustManager {
		public X509Certificate[] getAcceptedIssuers() {
			return null;
		}
		public boolean isServerTrusted(X509Certificate[] certs) {
			return true;
		}
		public boolean isClientTrusted(X509Certificate[] certs) {
			return true;
		}
		public void checkServerTrusted(X509Certificate[] certs, String authType)
				throws CertificateException {
			return;
		}
		public void checkClientTrusted(X509Certificate[] certs, String authType)
				throws CertificateException {
			return;
		}
	}
	/**
	 *   HTTPS   SSL  ，   openConnection    
	 * @throws Exception
	 */
	public static void ignoreSsl() throws Exception{
		HostnameVerifier hv = new HostnameVerifier() {
			public boolean verify(String urlHostName, SSLSession session) {
				System.out.println("Warning: URL Host: " + urlHostName + " vs. " + session.getPeerHost());
				return true;
			}
		};
		trustAllHttpsCertificates();
		HttpsURLConnection.setDefaultHostnameVerifier(hv);
	}
}

import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import org.apache.commons.io.IOUtils;
public class SslTest {
	public String getRequest(String url,int timeOut) throws Exception{
		URL u = new URL(url);
		if("https".equalsIgnoreCase(u.getProtocol())){
			SslUtils.ignoreSsl();
		}
		URLConnection conn = u.openConnection();
		conn.setConnectTimeout(timeOut);
		conn.setReadTimeout(timeOut);
		return IOUtils.toString(conn.getInputStream());
	}
	public String postRequest(String urlAddress,String args,int timeOut) throws Exception{
		URL url = new URL(urlAddress);
		if("https".equalsIgnoreCase(url.getProtocol())){
			SslUtils.ignoreSsl();
		}
		URLConnection u = url.openConnection();
		u.setDoInput(true);
        u.setDoOutput(true);
        u.setConnectTimeout(timeOut);
        u.setReadTimeout(timeOut);
        OutputStreamWriter osw = new OutputStreamWriter(u.getOutputStream(), "UTF-8");
        osw.write(args);
        osw.flush();
        osw.close();
        u.getOutputStream();
		return IOUtils.toString(u.getInputStream());
	}
	public static void main(String[] args) {
		try {
			SslTest st = new SslTest();
			String a = st.getRequest("https://xxx.com/login.action", 3000);
			System.out.println(a);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}