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com.sun.crypto.provider.SunJCE

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Could not instantiate bean class [com.lz.monitor.alert.service.ServiceImp]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com.sun.crypto.provider.SunJCE
Caused by: java.lang.NoClassDefFoundError: com.sun.crypto.provider.SunJCE


3DES加密解密调用示例
文章分类:Java编程 关键字: 3des加密解密调用示例
在java中调用sun公司提供的3DES加密解密算法时,需要使用到$JAVA_HOME/jre/lib/目录下如下的4个jar包:

  jce.jar

  security/US_export_policy.jar

  security/local_policy.jar

  ext/sunjce_provider.jar

  Java运行时会自动加载这些包,因此对于带main函数的应用程序不需要设置到CLASSPATH环境变量中。对于WEB应用,不需要把这些包加到WEB-INF/lib目录下。

  以下是java中调用sun公司提供的3DES加密解密算法的样本代码:

  /*字符串 DESede(3DES) 加密*/

  import java.security.*;

  import javax.crypto.*;

  import javax.crypto.spec.SecretKeySpec;

  public class ThreeDes {

  private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish

  //keybyte为加密密钥,长度为24字节

  //src为被加密的数据缓冲区(源)

  public static byte[] encryptMode(byte[] keybyte, byte[] src) {

  try {

  //生成密钥

  SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

  //加密

  Cipher c1 = Cipher.getInstance(Algorithm);

  c1.init(Cipher.ENCRYPT_MODE, deskey);

  return c1.doFinal(src);

  }

  catch (java.security.NoSuchAlgorithmException e1) {

  e1.printStackTrace();

  }

  catch (javax.crypto.NoSuchPaddingException e2) {

  e2.printStackTrace();

  }

  catch (java.lang.Exception e3) {

  e3.printStackTrace();

  }

  return null;

  }

  //keybyte为加密密钥,长度为24字节

  //src为加密后的缓冲区

  public static byte[] decryptMode(byte[] keybyte, byte[] src) {

  try {

  //生成密钥

  SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);

  //解密

  Cipher c1 = Cipher.getInstance(Algorithm);

  c1.init(Cipher.DECRYPT_MODE, deskey);

  return c1.doFinal(src);

  }

  catch (java.security.NoSuchAlgorithmException e1) {

  e1.printStackTrace();

  }

  catch (javax.crypto.NoSuchPaddingException e2) {

  e2.printStackTrace();

  }

  catch (java.lang.Exception e3) {

  e3.printStackTrace();

  }

  return null;

  }

  //转换成十六进制字符串

  public static String byte2hex(byte[] b) {

  String hs="";

  String stmp="";

  for (int n=0;n<b.length;n++) {

  stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));

  if (stmp.length()==1) hs=hs+"0"+stmp;

  else hs=hs+stmp;

  if (n<b.length-1) hs=hs+":";

  }

  return hs.toUpperCase();

  }

  public static void main(String[] args){

  //添加新安全算法,如果用JCE就要把它添加进去

  Security.addProvider(new com.sun.crypto.provider.SunJCE());

  final byte[] keyBytes = {0x11, 0x22, 0x4F, 0x58,

  (byte)0x88, 0x10, 0x40, 0x38, 0x28, 0x25, 0x79, 0x51,

  (byte)0xCB, (byte)0xDD, 0x55, 0x66, 0x77, 0x29, 0x74,

  (byte)0x98, 0x30, 0x40, 0x36, (byte)0xE2

  }; //24字节的密钥

  String szSrc = "This is a 3DES test. 测试";

  System.out.println("加密前的字符串:" + szSrc);

  byte[] encoded = encryptMode(keyBytes, szSrc.getBytes());

  System.out.println("加密后的字符串:" + new String(encoded));

  byte[] srcBytes = decryptMode(keyBytes, encoded);

  System.out.println("解密后的字符串:" + (new String(srcBytes)));

  }

  }
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1 楼 邦者无敌 2012-12-12  
如果是JDK1.3呢?是否要将上面四个jar包手动加入

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