php md5 16字符二進制格式 用JAVA寫

問題描述

md5($password_hash, true)這個php函數誰能用java寫出來

問題解答

import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; class CreateMD5 {public static String getMd5(String plainText , boolean rawOutPut) { try { MessageDigest md = MessageDigest.getInstance('MD5'); md.update(plainText.getBytes()); byte b[] = md.digest();int i;StringBuffer 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'); buf.append(Integer.toHexString(i)); } if(rawOutPut){return buf.toString().substring(8, 24); } return buf.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); return null; }} public static void main(String[] args) { System.out.println(CreateMD5.getMd5('segmentfault',true)); } }