简单MD5加密方法

public static String md5(String psd){ psd=psd+"phonesafe";//加盐处理,避免MD5码被轻易解析 byte[] hash; try { //1,指定加密算法类型(MD5),并将需要加密的字符串中转换成byte类型的数组,然后进行随机哈希过程 hash=MessageDigest.getInstance("MD5").digest(psd.getBytes("UTF-8")); } catch (NoSuchAlgorithmException e) { throw new RuntimeException("MD5 should be supported?",e); } catch (UnsupportedEncodingException e) { throw new RuntimeException("UTF-8 should be supported?",e); } //2,循环遍历bs,然后让其生成32位字符串,固定写法 StringBuilder hex=new StringBuilder(hash.length*2); for(byte b:hash){ //3,拼接字符串过程 if((b & 0xFF)<0x10)hex.append("0"); hex.append(Integer.toHexString(b & 0xFF)); } return hex.toString(); }