my mi

来源：互联网发布：tensorflow 英文官网编辑：程序博客网时间：2024/04/30 11:57

package com.changertech.struts;

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

public class Arithmetic {

static Key key;

/**
* 根据参数生成KEY
*
* @param strKey
*/
public static void getKey(String strKey) {
try {
   KeyGenerator _generator = KeyGenerator.getInstance("DES");
   _generator.init(new SecureRandom(strKey.getBytes()));
   key = _generator.generateKey();
   _generator = null;
} catch (Exception e) {
   e.printStackTrace();
}
}

/**
* 加密String明文输入,String密文输出
*
* @param strMing
* @return
*/
public static String getEncString(String strMing) {

String strMi = "";
try {
return byte2hex(getEncCode(strMing.getBytes()));

} catch (Exception e) {
e.printStackTrace();
}
return strMi;
}

/**
* 解密以String密文输入,String明文输出
*
* @param strMi
* @return
*/
public static String getDesString(String strMi) {

String strMing = "";
try {
return new String(getDesCode(hex2byte(strMi.getBytes())));

} catch (Exception e) {
e.printStackTrace();
}
return strMing;
}

/**
* 加密以byte[]明文输入,byte[]密文输出
*
* @param byteS
* @return
*/
private static byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
   cipher = Cipher.getInstance("DES");
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
   e.printStackTrace();
} finally {
   cipher = null;
}
return byteFina;
}

/**
* 解密以byte[]密文输入,以byte[]明文输出
*
* @param byteD
* @return
*/
private static byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
   cipher = Cipher.getInstance("DES");
   cipher.init(Cipher.DECRYPT_MODE, key);
   byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
   e.printStackTrace();
} finally {
   cipher = null;
}
return byteFina;
}

/**
* 二行制转字符串
*
* @param b
* @return
*/
public static String byte2hex(byte[] b) { // 一个字节的数，
// 转成16进制字符串
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
   // 整数转成十六进制表示
   stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
   if (stmp.length() == 1)
    hs = hs + "0" + stmp;
   else
    hs = hs + stmp;
}
return hs.toUpperCase(); // 转成大写
}

public static byte[] hex2byte(byte[] b) {
if ((b.length % 2) != 0)
   throw new IllegalArgumentException("长度不是偶数");
byte[] b2 = new byte[b.length / 2];
for (int n = 0; n < b.length; n += 2) {
   String item = new String(b, n, 2);
   // 两位一组，表示一个字节,把这样表示的16进制字符串，还原成一个进制字节
   b2[n / 2] = (byte) Integer.parseInt(item, 16);
}

return b2;
}

public static void main(String[] args) {
Arithmetic des = new Arithmetic();// 实例化一个对像
des.getKey("aadd");// 生成密匙

String strEnc = des.getEncString("樊振华");// 加密字符串,返回String的密文
System.out.println(strEnc);

String strDes = des.getDesString(strEnc);// 把String 类型的密文解密
System.out.println(strDes);
}

}

------------------------

response.setContentType("text/html;charset=utf-8");

  Arithmetic des =new Arithmetic();

   des.getKey("Kiss");// 生成密匙

String strEnc = des.getEncString(Math.round(Math.random()*8999+1000)+"10000000010505110214");// 加密字符串,返回String的密文
System.out.println(strEnc);

    String strDes = des.getDesString(strEnc);// 把String 类型的密文解密
    System.out.println(strDes);

   try {
   response.sendRedirect("url.jsp?i="+strEnc);
  } catch (IOException e) {
   e.printStackTrace();
  }

  return null;

---------------------------

String i = request.getParameter("i");
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>go</title>

</head>

<body>
<form action="showUrl.do" name="form1" method="post">

    </form>
    <script language="javascript">
   document.form1.submit();
</script>

</body>

-------------------------------

response.setContentType("text/html;charset=utf-8");

  String strEnc = request.getParameter("i");


  Arithmetic des =new Arithmetic();

  des.getKey("Kiss");// 生成密匙

   String strDes = des.getDesString(strEnc);// 把String 类型的密文解密

  String questionID = strDes.substring(0,10);
  String sid = strDes.substring(10, strDes.length());

   System.out.println("questionID="+questionID);
  System.out.println("sid="+sid);
  return null;