import java.security.MessageDigest;
public class StringUtil {
/** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub //System.out.println(MD5Encode("a")); }
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
/** * 转换字节数组为16进制字串 * * @param b * 字节数组 * @return 16进制字串 */
public static String byteArrayToHexString(byte[] b) { StringBuffer resultSb = new StringBuffer(); for (int i = 0; i < b.length; i++) { resultSb.append(byteToHexString(b[i])); } return resultSb.toString(); }
private static String byteToHexString(byte b) { int n = b; if (n < 0) n = 256 + n; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; }
public static String MD5Encode(String origin) { String resultString = null;
try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); resultString = byteArrayToHexString(md.digest(resultString .getBytes())); } catch (Exception ex) {
} return resultString; }
}
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