c++代码翻译成java代码，请指教！

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c++代码翻译成java代码，请指教！30

这是一段c++代码：
#include "stdafx.h"
#include "Minica.h"
#include "Des.h"
#include "Window.h"
#include "GfL.h"
#include "md5.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
CString strMd5Key="xxxzxxxzzzx";
/******************************************************************************/
//	名称：Decrypt
//	功能：解密
//  参数：KeyStr为0结尾的密钥串，长度<=16，可为任意字符
//	返回：解密成功返回true，否则返回false
//  备注：当密钥长度>8时，系统自动使用3次DES解密
/******************************************************************************/
bool CDes::Decrypt(const char *OutFile,const char *InFile,const char *KeyStr)
{
	try{
		CMd5  md5;
		int nKeykey=5*6;
		nKeykey+=256;
		CString m_password;
		m_password.Format("%d%d",nKeykey,nKeykey);
		md5.TargetStr(strMd5Key +m_password);
		CString strsawkey =  md5.Digest;		 
		CString m_filepath=InFile;
		CString m_destFile=OutFile;
		LARGE_INTEGER llfilesize;
		HANDLE hfile = CreateFile(m_filepath,GENERIC_READ,FILE_SHARE_READ,
			NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
		if(INVALID_HANDLE_VALUE == hfile  ||   !hfile)
			return false;
		llfilesize.LowPart = GetFileSize(hfile,(LPDWORD)&llfilesize.HighPart);
		CloseHandle(hfile);
		 LONGLONG filesize = llfilesize.QuadPart;     
		 CString strflag;
		   FILE * pfSrc = fopen(m_filepath,"rb");
		   if(NULL==pfSrc)
			   return false;
		   bool bNewJiami=false;
		   if(filesize>500)
		   {
			   char pre[500]={0};
			   int readed=	 fread(pre,1,500,pfSrc);
			   if(readed!=500)
			   {
				   fclose(pfSrc);
				   return false;
			   }
			   if(0==memcmp(pre,flag,30))
			   {
				   char szRadom[50]={0};
				   memcpy(szRadom,pre+50,50);
				   char szName[200]={0};
				   memcpy(szName,pre+100,200);

				   CString strRadom=szRadom;
				   CString strName=szName;
				   strflag=strRadom;
				   bNewJiami=false;

				   filesize=filesize-500;
			   }
			   else
			   {
					strflag.Format("%ld",filesize);
			   fseek(pfSrc,0,SEEK_SET);
			   }
			  

		   }
		 CString strNewKey=strsawkey +strflag;
		 md5.TargetStr(strNewKey);
		  strsawkey =  md5.Digest;
		keyLock  teaa= convert_Str_To_Key( const_cast<char *>( (const char *)strsawkey )  );    
			char buffsrc[4096*64];
			char buffdst[4096*64];
		char temp[4096*64];  
		 FILE * pfdst = fopen(m_destFile,"wb+");
		  if(pfdst==pfSrc)
			 return false;
		 int  readed =0;
		 LONGLONG  allreaded=0;
		 int newpercent=0;
		 int oldpercent =0; 
		while (readed = fread(temp,1,4096*16,pfSrc)) 
		{
					if(99==m_Abort)
					break;
			 allreaded+=readed;    
			 int converted  = First(temp,readed,teaa);
			 if (readed != converted)
			 {
				 AfxMessageBox("解密出错");
				 fclose(pfdst);
				 fclose(pfSrc);
				 return false;
			 }
			 fwrite(temp,1,readed,pfdst);
			 
			 newpercent = allreaded*100/filesize;
			 if (newpercent != oldpercent)
			 {
				 oldpercent=newpercent;
			 }      
		} 
		fclose(pfdst);
		fclose(pfSrc);
		return true;
	}
	catch(...)
	{
		AfxMessageBox("加载后");
	return false;
	}
	return true;
}
struct keyLock
{
	keyLock(   )
	{
		key=NULL;
        keycount=0;
	}
	keyLock(int count)
	{
	    key=NULL;
        keycount=0;
		key = new char[count];
	    if (key)
	    {
			memset(key,0,count);
	    }
	}
	~keyLock()
	{
		if (key)
		{
			delete key;
		}
	}
	keyLock(const keyLock& src)
	{
	   key =NULL;
		
		key = new char[src.keycount];
		if (key)
		{
			//memset(key,0,src.keycount);
			memcpy(key,src.key,src.keycount);
			keycount = src.keycount;
	    }
	}
	 keyLock operator=(keyLock& src) 
	 {
        if (key)
        {
			delete key;
			keycount=0;
        }
		key = new char[src.keycount];
		if (key)
		{
			//memset(key,0,src.keycount);
			memcpy(key,src.key,src.keycount);
			keycount = src.keycount;
		}
		return *this;
	 }

char *key ;
int keycount ;
};
keyLock convert_Str_To_Key(char* str)
{
      int nstrcount=0;
      char * temp =str;
	  while ('\0' != *temp )
	  {
	    nstrcount++;
		temp++;
	  }
	  if (!nstrcount)
	  {
		  return NULL;
	  }
	  keyLock key(nstrcount*2 );
       
	  char * cur= key.key;
	  while ('\0' != *str )
	  {

		  *cur = (*str)%8 +1;
		  cur++;
        
		    *cur = (*str)/8 +1; 
		  		  cur++;
		  		   
		     /*       *cur = ((*str)+8121)%8 +1; 
		  		  cur++;
		  		  *cur = ((*str)+2010)/8%8 +1; 
		  		  cur++;*/
		  

		  str++;
		  key.keycount+=2;
	  }
	  return  key;
}

int First(char *src,int count,keyLock key)
{
	int i =0;
   for (  i =0;i<count;)
   {
	   for (int j=0;(j<key.keycount && i<count);j++,i++)
	   {
		   src[i]=~src[i];
		   char keybit = ((1<<(key.key[j]-1)) & src[i]  );
		   src[i] = ( (~keybit) & (1<<(key.key[j]-1) ) )     |   ( ( ~(1<<(key.key[j]-1))) & src[i] );
           if (ispower && ((j+3)<key.keycount))
           {
			   j++;
			   keybit = ((1<<(key.key[j]-1)) & src[i]  );
			   
		       src[i] = ( (~keybit) & (1<<(key.key[j]-1) ) )     |   ( ( ~(1<<(key.key[j]-1))) & src[i] );
                 
			   j++;
			   keybit = ((1<<(key.key[j]-1)) & src[i]  );
			   
			   src[i] = ( (~keybit) & (1<<(key.key[j]-1) ) )     |   ( ( ~(1<<(key.key[j]-1))) & src[i] );


           }
	   }
	   if (ispower)
	   {
      	CMd5  md5;
		key.key[20]='\0';
			CString stroldkey =key.key;
		md5.TargetStr(strMd5Key + stroldkey);
        CString strsawkey =  md5.Digest;
		key = convert_Str_To_Key( const_cast<char *>( (const char *)strsawkey )  );
	   }
	   
   }
   return i;
   
}
翻译好能加我扣扣（465053705）么，谢谢了