,,,,
,,,,
<强>
import java.security.MessageDigest;
public static final String 编码(String s), {
,,,,,,,char hexDigits [],=, {
“0”,“1”,“2”,“3”,“4”,“5”,“6”,“7”,“8”,“9”,
A, B,,“C”,“D”,“E”,,“F”,};
try {
时间=byte [], btInput s.getBytes ();//,获得MD5摘要算法的,MessageDigest 对象
MessageDigest mdInst =, MessageDigest.getInstance (MD5);//,使用指定的字节更新摘要
mdInst.update (btInput);//,获得密文
时间=byte [], md mdInst.digest ();//,把密文转换成十六进制的字符串形式
int j =, md.length;
char str [],=, new char (* j 2);
int k =, 0;
for (int 小姐:=,0;,小姐:& lt;, j;,我+ +),{
byte byte0 =, md[我];
str (k + +),=, hexDigits [byte0 在祝辞祝辞,4,,,0 xf);
str (k + +),=, hexDigits [byte0 ,, 0 xf);
}
return new 字符串(str);
},catch (Exception e), {
e.printStackTrace ();
return 零;
}
}
<强>
public static String COMMON_KEY =,“公元843年”;//密钥
public static byte [], desEncrypt (String 味精,String 盐),{
if (msg ==, null)
msg =,“”;
if (salt ==, null), {
时间=salt COMMON_KEY;
}
时间=byte [], keyBytes new 字节[8];
int saltLen =, salt.length ();
时间=byte [], saltBytes salt.getBytes();//转换成字节数组,这是加密的必要步骤!
for (int 小姐:=,0;,小姐:& lt;, 8;,我+ +),{
keyBytes[我],=,saltBytes[小姐:%,saltLen);
}
try {
DESKeySpec keySpec =, new DESKeySpec (keyBytes);
SecretKey key =, SecretKeyFactory.getInstance (DES) .generateSecret (keySpec);
Cipher desCipher =, . getinstance (“DES/欧洲/PKCS5Padding”);
desCipher.init (Cipher.ENCRYPT_MODE,关键);
时间=byte [], text msg.getBytes (“utf - 8”);
时间=byte [], ciphertext desCipher.doFinal(文本);
return 密文;
},catch (Exception e), {
e.printStackTrace ();
}
return 零;
}
public static String desDecrypt (byte[],味精、,String 盐),{
if (msg ==, null)
return 零;
if (salt ==, null), {
时间=salt COMMON_KEY;
}
时间=byte [], keyBytes new 字节[8];
int saltLen =, salt.length ();
时间=byte [], saltBytes salt.getBytes ();
for (int 小姐:=,0;,小姐:& lt;, 8;,我+ +),{
keyBytes[我],=,saltBytes[小姐:%,saltLen);
}
try {
DESKeySpec keySpec =, new DESKeySpec (keyBytes);
SecretKey key =, SecretKeyFactory.getInstance (DES) .generateSecret (keySpec);
Cipher desCipher =, . getinstance (“DES/欧洲/PKCS5Padding”);
desCipher.init (Cipher.DECRYPT_MODE,关键);
时间=byte [], deciphertext desCipher.doFinal(味精);
return new 字符串(deciphertext,“utf - 8”);
},catch (Exception e), {
e.printStackTrace ();
}
return 零;
}
public static String dumpBytes (byte[],字节),{
StringBuffer sb =, new StringBuffer ();
for (int 小姐:=,0;,小姐:& lt;, bytes.length;,我+ +),{
if (小姐:%,32,==,0,,,,小姐:!=,0),{
sb.append (“\ n”);
}
String s =, Integer.toHexString(字节[我]);
if (s.length (), & lt;, 2), {
时间=s “0”, +,年代;
}
if (s.length(),祝辞,2),{
时间=s s.substring (s.length(),安康;2);
}
sb.append(年代);
}
return sb.toString ();
}
public static byte [], parseBytes (String str), {
try {
int len =, str.length (),/, 2;
时间=if (len & lt; 2), {
return new byte [], {, Byte.parseByte (str),};
}
时间=byte [], arr new 字节(len);
for (int 小姐:=,0;,小姐:& lt;, arr.length;,我+ +),{
arr[我],=,(字节),Integer.parseInt (
str.substring(小姐:*,2,,小姐:*,2,+,2),,16);
}
return 加勒比海盗;
},catch (Exception e), {
return new 字节[0];
}
}/* *
,*加密
*大敌;
,* @param encrypt_value
,*,,,,,,,,,,,被加密的字符串
,* @param encrypt_key
,*,,,,,,,,,,,加密的密钥
,* @return
,*/null
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