url加密参数 （java版）
转自：http://hi.baidu.com/316133782/blog/item/e5fc74ccdcf1cc1601e92835.html/** *加密解密类 * * * */ package com.abacus.common ; import java.security. *; import javax.crypto. *; /** *加密解密类 */ public class Eryptogram { private static String Algorithm ="DES"; //定义加密算法,可用DES,DESede,Blowfish static boolean debug =false ; /** *构造子注解. */ public Eryptogram () { } /** *生成密钥 *@returnbyte[]返回生成的密钥 *@throwsexception扔出异常. */ public static byte []getSecretKey ()throws Exception { KeyGenerator keygen =KeyGenerator.getInstance (Algorithm ); SecretKey deskey =keygen.generateKey (); if (debug )System.out.println ("生成密钥:"+byte2hex (deskey.getEncoded ())); return deskey.getEncoded (); } /** *将指定的数据根据提供的密钥进行加密 *@paraminput需要加密的数据 *@paramkey密钥 *@returnbyte[]加密后的数据 *@throwsException */ public static byte []encryptData (byte []input ,byte []key )throws Exception { SecretKey deskey =new javax.crypto.spec.SecretKeySpec (key ,Algorithm ); if (debug ) { System.out.println ("加密前的二进串:"+byte2hex (input )); System.out.println ("加密前的字符串:"+new String (input )); } Cipher c1 =Cipher.getInstance (Algorithm ); c1.init (Cipher.ENCRYPT_MODE ,deskey ); byte []cipherByte =c1.doFinal (input ); if (debug )System.out.println ("加密后的二进串:"+byte2hex (cipherByte )); return cipherByte ; } /** *将给定的已加密的数据通过指定的密钥进行解密 *@paraminput待解密的数据 *@paramkey密钥 *@returnbyte[]解密后的数据 *@throwsException */ public static byte []decryptData (byte []input ,byte []key )throws Exception { SecretKey deskey =new javax.crypto.spec.SecretKeySpec (key ,Algorithm ); if (debug )System.out.println ("解密前的信息:"+byte2hex (input )); Cipher c1 =Cipher.getInstance (Algorithm ); c1.init (Cipher.DECRYPT_MODE ,deskey ); byte []clearByte =c1.doFinal (input ); if (debug ) { System.out.println ("解密后的二进串:"+byte2hex (clearByte )); System.out.println ("解密后的字符串:"+(new String (clearByte ))); } return clearByte ; } /** *字节码转换成16进制字符串 *@parambyte[]b输入要转换的字节码 *@returnString返回转换后的16进制字符串 */ public static String byte2hex (byte []b ) { String hs =""; String stmp =""; for (int n =0 ;n <b.length ;n ++) { stmp =(java.lang.Integer.toHexString (b &0XFF )); if (stmp.length ()==1 )hs =hs +"0"+stmp ; else hs =hs +stmp ; if (n <b.length -1 )hs =hs +":"; } return hs.toUpperCase (); } public static void main (String []args ) { try { debug =false ; Eryptogram etg =new Eryptogram (); byte []key =etg.getSecretKey (); System.out.println ("key="+key ); String aa ="1234567"; byte []data =aa.getBytes (); System.out.println (data ); byte []en =etg.encryptData (data ,key ); System.out.println ("encryptData="+new String (en )); byte []de =etg.decryptData (en ,key ); System.out.println ("decryptData="+new String (de )); } catch (Exception e ) { e.printStackTrace (); } } }
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