轉自 ：http://blog.sina.com.cn/s/blog_57432f380101s2l7.html

JRE8 + jce_policy-8, Bouncy Castle 1.50環境下除錯通過

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.Security;

import javax.crypto.Cipher;
import javax.xml.bind.annotation.adapters.HexBinaryAdapter;

import org.bouncycastle.jce.interfaces.ECPrivateKey;
import org.bouncycastle.jce.interfaces.ECPublicKey;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;

public class TestECC {

 public static void main(String[] args) throws Exception {
  byte[] plainText = "Hello World!".getBytes();
  byte[] cipherText = null;
  
  Security.addProvider(new BouncyCastleProvider());
  //生成公鑰和私鑰
  KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ECIES", "BC");
  KeyPair keyPair = keyPairGenerator.generateKeyPair();  
  ECPublicKey ecPublicKey = (ECPublicKey) keyPair.getPublic();
  ECPrivateKey ecPrivateKey = (ECPrivateKey) keyPair.getPrivate();
  //列印金鑰資訊
  ECCurve ecCurve = ecPublicKey.getParameters().getCurve();
  System.out.println("橢圓曲線引數a = " + ecCurve.getA().toBigInteger());
  System.out.println("橢圓曲線引數b = " + ecCurve.getB().toBigInteger());
  System.out.println("橢圓曲線引數q = " + ((ECCurve.Fp) ecCurve).getQ());
  ECPoint basePoint = ecPublicKey.getParameters().getG();
  System.out.println("基點橫座標              "
    + basePoint.getAffineXCoord().toBigInteger());
  System.out.println("基點縱座標              "
    + basePoint.getAffineYCoord().toBigInteger());
  System.out.println("公鑰橫座標              "
    + ecPublicKey.getQ().getAffineXCoord().toBigInteger());
  System.out.println("公鑰縱座標              "
    + ecPublicKey.getQ().getAffineYCoord().toBigInteger());
  System.out.println("私鑰                         " + ecPrivateKey.getD());

  Cipher cipher = Cipher.getInstance("ECIESwithDESede/NONE/PKCS7Padding", "BC");
  // 加密
  cipher.init(Cipher.ENCRYPT_MODE, ecPublicKey);
  cipherText = cipher.doFinal(plainText);
  System.out.println("密文: " + new HexBinaryAdapter().marshal(cipherText));
  // 解密
  cipher.init(Cipher.DECRYPT_MODE, ecPrivateKey);
  plainText = cipher.doFinal(cipherText);
  // 列印解密後的明文
  System.out.println("解密後的明文: " + new String(plainText));
 }
}