Java和JS MD5加密-附盐值加密demo
JAVA和JS的MD5加密
经过测试：字母和数据好使，中文不好使。
源码如下：
**
* 类MD5Util.java的实现描述：
*
*/
public class MD5Util {
// 获得MD5摘要算法的 MessageDigest 对象
private static MessageDigest _mdInst = null;
private static char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
private static MessageDigest getMdInst() {
if (_mdInst == null) {
try {
_mdInst = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
return _mdInst;
}
private MD5Util() {
}
/**
* Returns a MessageDigest for the given <code>algorithm</code>.
*
* @return An MD5 digest instance.
* @throws RuntimeException when a {@link NoSuchAlgorithmException} is caught
*/
static MessageDigest getDigest() {
try {
return MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
/**
* Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
*
* @param data Data to digest
* @return MD5 digest
*/
public static byte[] md5(byte[] data) {
return getDigest().digest(data);
}
/**
* Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
*
* @param data Data to digest
* @return MD5 digest
*/
public static byte[] md5(String data) {
return md5(data.getBytes());
}
/**
* Calculates the MD5 digest and returns the value as a 32 character hex string.
*
* @param data Data to digest
* @return MD5 digest as a hex string
*/
/*public static String md5Hex(byte[] data) {
return HexUtil.toHexString(md5(data));
}*/
/**
* Calculates the MD5 digest and returns the value as a 32 character hex string.
*
* @param data Data to digest
* @return MD5 digest as a hex string
*/
/*public static String md5Hex(String data) {
return HexUtil.toHexString(md5(data));
}*/
/**
* 对密码字符串进行MD5加密
*
* @param pass
* @return
*/
public static String encoding(String pass) {
if (pass == null) {
return "";
} else {
StringBuffer buf = null;
MessageDigest md5 = null;
try {
// 获取md5摘要
md5 = MessageDigest.getInstance("MD5");
// 指定utf-8编码
md5.update(pass.getBytes("utf-8"));
byte[] b = md5.digest();
int i;
buf = new StringBuffer("");
for (int offset = 0; offset < b.length; offset++) {
i = b[offset];
if (i < 0) {
i += 256;
}
if (i < 16) {
buf.append("0");
}
// 产生16进制保存
buf.append(Integer.toHexString(i));
}
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}