1, MD5 encryption, the encryption algorithm is one-way encryption, that is, the encrypted data can no longer be restored by decryption. The related classes are included in the Java.security.MessageDigest package.
2, 3-des encryption, the encryption algorithm is reversible, the decryption party can be encrypted by the agreement with the secret key to decrypt. The related classes are included in the javax.crypto.* package.
3. Base64 encoding is the most commonly used encoding method for transmitting 8bit byte code. Related classes are in Sun.misc.BASE64Decoder and Sun.misc.BASE64Encoder.
4, Urlencoder code, is a character encoding, to ensure that the parameters are transmitted by following the specification of the text composition. The related class is in the Java.net.URLEncoder package.
Details:
1, to carry out MD5 encryption, get byte[]
Copy Code code as follows:
/**
* For MD5 encryption
* @param String Original Spkey
* @return byte[] Specifies the byte[of the encryption method after MD5]
*/
Private byte[] MD5 (String strsrc)
{
byte[] Returnbyte = null;
Try
{
MessageDigest MD5 = messagedigest.getinstance ("MD5");
Returnbyte = Md5.digest (Strsrc.getbytes ("GBK"));
}
catch (Exception e)
{
E.printstacktrace ();
}
return returnbyte;
}
2, get the 3-des key
Copy Code code as follows:
/**
* Get the 3-des key
* According to the need, such as the key is 24 bytes, MD5 encryption is 16 bytes, so after 8 bytes of 0
* @param String Original Spkey
* @return byte[] Specifies the byte[of the encryption method after MD5]
*/
Private byte[] Getenkey (String spkey)
{
Byte[] Deskey=null;
Try
{
Byte[] DesKey1 = MD5 (Spkey);
Deskey = new BYTE[24];
int i = 0;
while (I < deskey1.length && I < 24) {
Deskey[i] = Deskey1[i];
i++;
}
if (I < 24) {
Deskey[i] = 0;
i++;
}
}
catch (Exception e) {
E.printstacktrace ();
}
return deskey;
}
3, 3-des encryption
Copy Code code as follows:
/**
* 3-des Encryption
* @param byte[] src to be 3-des encrypted byte[]
* @param byte[] enkey 3-des encryption key
* @return byte[] 3-des encrypted byte[]
*/
Public byte[] Encrypt (byte[] src,byte[] enkey)
{
byte[] EncryptedData = null;
Try
{
Desedekeyspec DKs = new Desedekeyspec (Enkey);
Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("Desede");
Secretkey key = Keyfactory.generatesecret (DKS);
Cipher Cipher = cipher.getinstance ("Desede");
Cipher.init (Cipher.encrypt_mode, key);
EncryptedData = cipher.dofinal (src);
}
catch (Exception e)
{
E.printstacktrace ();
}
return EncryptedData;
}
4. BASE64 Encoding of strings
Copy Code code as follows:
/**
* BASE64 Encoding of strings
* @param byte[] src characters to encode
*
* String encoded by @return string
*/
Public String getbase64encode (byte[] src)
{
String requestvalue= "";
try{
Base64encoder base64en = new Base64encoder ();
Requestvalue=base64en.encode (SRC);
System.out.println (Requestvalue);
}
catch (Exception e) {
E.printstacktrace ();
}
return requestvalue;
}
Current 1/2 page
12 Next read the full text
