public String getDesString(String strMi)
{
BASE64Decoder base64De = new BASE64Decoder();
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try
{
byteMi = base64De.decodeBuffer(strMi);
byteMing = this.getDesCode(byteMi);
strMing = new String(byteMing, "UTF8");
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
base64De = null;
byteMing = null;
byteMi = null;
}
return strMing;
}
/**
* 加密以byte[]明文输入,byte[]密文输出
* @param byteS
* @return
*/
private 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;
}
/**
* 青年人网站解密以byte[]密文输入,以byte[]明文输出
* @param byteD
* @return
*/
private 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;
}
public static void main(String[] args){
System.out.println("des demo");
DesEncrypt des=new DesEncrypt();//实例化一个对像
des.getKey("MYKEY11");//生成密匙
System.out.println("key=MYKEY11");
String strEnc = des.getEncString("CHINA");//加密字符串,返回String的密文
System.out.println("密文="+strEnc);
String strDes = des.getDesString(strEnc);//把String 类型的密文解密
System.out.println("明文="+strDes);
}
}
/*
运行结果：
des demo
key=MYKEY11
密文=n2r7F/mmYiY=
明文=CHINA
*/
责任编辑：小草
