MD5加密

最新推荐文章于 2022-12-28 13:50:25 发布

原创最新推荐文章于 2022-12-28 13:50:25 发布 · 275 阅读

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CC 4.0 BY-SA版权

/**
* 加密工具类
*
* @author
*
*/
public class MD5Util {

public static void main(String[] args) {
  System.out.println(md5("0096000100015352FFFFFFFFD52800D717010000000000011601FFFFFFFFFFFFFFFFFFFFFFFF"));
  System.out.println(sha1("123456"));
  System.out.println(md5(sha1("123456")));
}

/**
* md5加密
*
* @param str
* @return
*/
public static String md5(String str) {
return encrypt(str,"md5");
}

/**
* sha加密
*
* @param inputText
* @return
*/
public static String sha1(String str) {
  return encrypt(str, "sha-1");
}

/**
* md5或者sha-1加密
*
* @param inputText
*            要加密的内容
* @param algorithmName
*            加密算法名称：md5或者sha-1，不区分大小写
* @return
*/
private static String encrypt(String inputText, String algorithmName) {
  if (inputText == null || "".equals(inputText.trim())) {
   throw new IllegalArgumentException("请输入要加密的内容");
  }
  if (algorithmName == null || "".equals(algorithmName.trim())) {
   algorithmName = "md5";
  }
  String encryptText = null;
  try {
   MessageDigest m = MessageDigest.getInstance(algorithmName);
   m.update(inputText.getBytes("UTF8"));
   byte s[] = m.digest();
   // m.digest(inputText.getBytes("UTF8"));
   return hex(s);
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  }
  return encryptText;
}

/**
* 返回十六进制字符串
*
* @param arr
* @return
*/
private static String hex(byte[] arr) {
  StringBuffer sb = new StringBuffer();
  for (int i = 0; i < arr.length; ++i) {
   sb.append(Integer.toHexString((arr[i] & 0xFF) | 0x100).substring(1, 3));
  }
  return sb.toString();
}