獲取服務端SSL證書，並安裝

import java.io.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;

public class InstallCert {

    public static void install(String[] args) throws Exception {
  String host;
  int port;
  char[] passphrase;
  
  if ((args.length == 1) || (args.length == 2)) {
      String[] c = args[0].split(":");
      host = c[0];
      port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
      String p = (args.length == 1) ? "changeit" : args[1];
      passphrase = p.toCharArray();
  } else {
      System.out.println("Usage: java InstallCert <host>[:port] [passphrase]");
      return;
  }
  
  String filename = "wscerts.crt";
  File file = new File(filename);
  if (file.isFile() == false) {
      char SEP = File.separatorChar;
      File dir = new File(System.getProperty("java.home") + SEP + "lib" + SEP + "security");
      file = new File(dir, filename);
      if (file.isFile() == false) {
       file = new File(dir, "cacerts");
      }
  }
  
  System.out.println("Loading KeyStore " + file + "...");
  InputStream in = new FileInputStream(file);
  KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
  ks.load(in, passphrase);
  in.close();
 
  SSLContext context = SSLContext.getInstance("TLS");
  TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
  tmf.init(ks);
  X509TrustManager defaultTrustManager = (X509TrustManager)tmf.getTrustManagers()[0];
  SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
  context.init(null, new TrustManager[] {tm}, null);
  SSLSocketFactory factory = context.getSocketFactory();
 
  System.out.println("Opening connection to " + host + ":" + port + "...");
  SSLSocket socket = (SSLSocket)factory.createSocket(host, port);
  socket.setSoTimeout(10000);
  try {
      System.out.println("Starting SSL handshake...");
      socket.startHandshake();
      socket.close();
      System.out.println();
      System.out.println("No errors, certificate is already trusted");
  } catch (SSLException e) {
      System.out.println();
      e.printStackTrace(System.out);
  }
 
  X509Certificate[] chain = tm.chain;
  if (chain == null) {
      System.out.println("Could not obtain server certificate chain");
      return;
  }
 
  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
 
  System.out.println();
  System.out.println("Server sent " + chain.length + " certificate(s):");
  System.out.println();
  MessageDigest sha1 = MessageDigest.getInstance("SHA1");
  MessageDigest md5 = MessageDigest.getInstance("MD5");
  for (int i = 0; i < chain.length; i++) {
      X509Certificate cert = chain[i];
      System.out.println
       (" " + (i + 1) + " Subject " + cert.getSubjectDN());
      System.out.println("   Issuer  " + cert.getIssuerDN());
      sha1.update(cert.getEncoded());
      System.out.println("   sha1    " + toHexString(sha1.digest()));
      md5.update(cert.getEncoded());
      System.out.println("   md5     " + toHexString(md5.digest()));
      System.out.println();
  }
 
  System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
  String line = reader.readLine().trim();
  int k;
  try {
      k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
  } catch (NumberFormatException e) {
      System.out.println("KeyStore not changed");
      return;
  }
 
  X509Certificate cert = chain[k];
  String alias = host + "-" + (k + 1);
  ks.setCertificateEntry(alias, cert);
 
  OutputStream out = new FileOutputStream(filename);
  ks.store(out, passphrase);
  out.close();
 
  System.out.println();
  System.out.println(cert);
  System.out.println();
  System.out.println("Added certificate to keystore '" + filename + "' using alias '" + alias + "'");
 }
 
    private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();

    private static String toHexString(byte[] bytes) {
  StringBuilder sb = new StringBuilder(bytes.length * 3);
  for (int b : bytes) {
      b &= 0xff;
      sb.append(HEXDIGITS[b >> 4]);
      sb.append(HEXDIGITS[b & 15]);
      sb.append(' ');
  }
  return sb.toString();
    }
 
  private static class SavingTrustManager implements X509TrustManager {
 
  private final X509TrustManager tm;
  private X509Certificate[] chain;
 
  SavingTrustManager(X509TrustManager tm) {
      this.tm = tm;
  }
 
  public X509Certificate[] getAcceptedIssuers() {
      throw new UnsupportedOperationException();
  }
 
  public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
      throw new UnsupportedOperationException();
  }
 
  public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
      this.chain = chain;
      tm.checkServerTrusted(chain, authType);
  }
    }

}

 

public class TestInstallCert {
 public static void main(String[] args) {
  try {
   InstallCert.install(new String[]{"cloverdev.acxiom.com.cn"});
  } catch (Exception e) {
   e.printStackTrace();
  }
  
  System.setProperty("javax.net.ssl.trustStore", "D:\\workspace\\CommonUtils\\wscerts.crt");
 }
 }