MD5加密解密类(Java).doc

MD5加密解密类(Java).docpackage ;
import ;
import ;
import ;
import ;
import ;
public class MyMD5Util {
private static final String HEX_NUMS_STR="0123456789ABCDEF"; private static final Integer SALT_LENGTH = 12;
/*/
public static String byteToHexString(byte[] b) { StringBuffer hexString = new StringBuffer(); for (int i = 0; i < ; i++) {
String hex = (b[i] & 0xFF); if (() == 1) {
* 将 16 进制字符串转换成字节数组
* ***@param hex
* ***@return
*/
public static byte[] hexStringToByte(String hex) {
int len = (() / 2);
byte[] result = new byte[len];
char[] hexChars = ();
for (int i = 0; i < len; i++) {
int pos = i 将指定 byte 数组转换成 16 进制字符串
* ***@param b
* ***@return
2;
result[i] = (byte) ((hexChars[pos]) << 4
| (hexChars[pos +
1]));
}
return result;
}
hex = '0' + hex;
} (());
}
return ();
}
/**
* 验证口令是否合法
* ***@param password
* ***@param passwordInDb
* ***@return
* ***@throws NoSuchAlgorithmException
* ***@throws UnsupportedEncodingException
*/
public static boolean validPassword(String password, String passwordInDb)
throws NoSuchAlgorithmException, UnsupportedEncodingException {
// 将 16 进制字