package com.b510.note;  import java.math.BigInteger;  import java.security.MessageDigest;  import java.security.NoSuchAlgorithmException;  /**   * MD5加密   *   * @author Hongten   *   */  public class MD5 {      public static void main(String[] args) {          System.out.println(MD5.getMD5("123456"));      }      /**       * 用md5编码后的码值       *       * @param sInput       *            明码       * @return md5加密后的密码  */      public static String getMD5(String sInput) {          String algorithm = "";          if (sInput == null) {              return "null";          }          try {              algorithm = System.getProperty("MD5.algorithm", "MD5");          } catch (SecurityException se) {          }          MessageDigest md = null;          try {              md = MessageDigest.getInstance(algorithm);          } catch (NoSuchAlgorithmException e) {              e.printStackTrace();          }          byte buffer[] = sInput.getBytes();          for (int count = 0; count < sInput.length(); count++) {              md.update(buffer, 0, count);          }          byte bDigest[] = md.digest();          BigInteger bi = new BigInteger(bDigest);          return (bi.toString(16));      }  }

1 186d636867f51c667893c1b1b3d96dc3

1 //这里的数字是可以根据需要而进行改变的 2 return (bi.toString(16));