package com.xy.basics.annex;

public class Encrypt {

    //密钥 加解密的密钥必须相同 可自定义  
    private static final String secretKey ="6w3lacP9gmjbMgor";   
      
    /** 
     * 字符串加密 
     * @param plainText 要加密的字符串 
     * @return 加密后的字符串 
     */  
    public static String encrypt(String plainText){  
         String encryption = "";  
         try {  
             plainText =  new String(plainText.getBytes("UTF-8"),"iso-8859-1");  
            } catch (Exception e) {  
            }  
         char[] cipher=new char[plainText.length()];  
         for(int i=0,j=0;i<plainText.length();i++,j++){  
             if(j==secretKey.length())  
                 j=0;  
             cipher[i]=(char) (plainText.charAt(i)^secretKey.charAt(j));  
             String strCipher= Integer.toHexString(cipher[i]);  
             if(strCipher.length() == 1){  
                 encryption+="0"+strCipher;  
             }else{  
                 encryption+=strCipher;  
             }  
         }  
         return encryption;  
     }  
  
    /** 
     * 解密字符串 
     * @param encryption 要解密的字符串 
     * @return 解密后的字符串 
     */  
    public static String decrypt(String encryption) {  
         char[] decryption=new char[encryption.length()/2];  
         for(int i=0,j=0;i<encryption.length()/2;i++,j++){  
             if(j==secretKey.length())  
                 j=0;  
             char n=(char)(int)Integer.valueOf(encryption.substring(i*2,i*2+2),16);  
             decryption[i]=(char)(n^secretKey.charAt(j));  
         }  
         String decoding="";  
         try {  
             decoding = new String(String.valueOf(decryption).getBytes("iso-8859-1"),"UTF-8");  
                } catch (Exception e) {  
            }  
         return decoding;  
     }  
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
        String name="13621372753";
         String tem=Encrypt.encrypt(name);  
         System.out.println(tem);  
         System.out.println(Encrypt.decrypt(tem));  
  
    }  

}