md.rar_message encryption

import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class md { public static void main(String[] args) { // TODO Auto-generated method stub try { MessageDigest md = MessageDigest.getInstance("MD5"); String test = "1234"; md.update(test.getBytes()); byte[] digest = md.digest(); System.out.println("test加密後 :" + digest.toString()); final StringBuffer buffer = new StringBuffer(); for (int i = 0; i < digest.length; ++i) { final byte b = digest[i]; final int value = (b & 0x7F) + (b < 0 ? 128 : 0); buffer.append(value < 16 ? "0" : ""); buffer.append(Integer.toHexString(value)); } System.out.println("sessionid " + test + " md5 version is " + buffer.toString()); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } } }