SHA-1加密

 　　/**
      * SHA-1加密
      * @param strSrc 要加密的字符串
      * @return 加密后的字符串
      */
     public static String SHAEncrypt(String strSrc) {
         MessageDigest md = null;
         String strDes = null;
         byte[] bt = strSrc.getBytes();
         try {
             md = MessageDigest.getInstance("SHA-1");
             md.update(bt);
             strDes = bytes2Hex(md.digest());
         } catch (NoSuchAlgorithmException e) {
             System.out.println("Invalid algorithm.");
             return null;
         }
         return strDes;
     }

     public static String bytes2Hex(byte[] bts) {
         String des = "";
         String tmp = null;
         for (int i = 0; i < bts.length; i++) {
             tmp = (Integer.toHexString(bts[i] & 0xFF));
             if (tmp.length() == 1) {
                 des += "0";
             }
             des += tmp;
         }
         return des;
     }
     //演示
     @Test
     public void demo(){
         System.out.println(SHAEncrypt("1223344"));
     }

输出结果: a3547da48ed532585429eae800ac93147552d63a