運行：regsvr32 c:\windows\system32\hhctrl.ocx
package
?des;?
import
?java.io.
*
;?
import
?java.nio.
*
;?
import
?java.nio.channels.FileChannel;?
public
?
class
?FileDES{?
private
?
static
?
final
?
boolean
?enc
=
true
;?
//
加密?
private
?
static
?
final
?
boolean
?dec
=
false
;?
//
解密?
private
?String?srcFileName;?
private
?String?destFileName;?
private
?String?inKey;?
private
?
boolean
?actionType;?
private
?File?srcFile;?
private
?File?destFile;?
private
?Des?des;?
private
?
void
?analyzePath(){?
String?dirName;?
int
?pos
=
srcFileName.lastIndexOf(
"
/
"
);?
dirName
=
srcFileName.substring(
0
,pos);?
File?dir
=
new
?File(dirName);?
if
?(
!
dir.exists()){?
System.err.println(dirName
+
"
?is?not?exist
"
);?
System.exit(
1
);?
}
else
?
if
(
!
dir.isDirectory()){?
System.err.println(dirName
+
"
?is?not?a?directory
"
);?
System.exit(
1
);?
}?
pos
=
destFileName.lastIndexOf(
"
/
"
);?
dirName
=
destFileName.substring(
0
,pos);?
dir
=
new
?File(dirName);?
if
?(
!
dir.exists()){?
if
(
!
dir.mkdirs()){?
System.out.println?(
"
can?not?creat?directory:
"
+
dirName);?
System.exit(
1
);?
}?
}
else
?
if
(
!
dir.isDirectory()){?
System.err.println(dirName
+
"
?is?not?a?directory
"
);?
System.exit(
1
);?
}?
}?
private
?
static
?
int
?replenish(FileChannel?channel,ByteBuffer?buf)?
throws
?IOException{?
long
?byteLeft
=
channel.size()
-
channel.position();?
if
(byteLeft
==
0L
)?
return
?
-
1
;?
buf.position(
0
);?
buf.limit(buf.position()
+
(byteLeft
<
8
?
?
?(
int
)byteLeft?:
8
));?
return
?channel.read(buf);?
}?
private
?
void
?file_operate(
boolean
?flag){?
des
=
new
?Des(inKey);?
FileOutputStream?outputFile
=
null
;?
try
?{?
outputFile
=
new
?FileOutputStream(srcFile,
true
);?
}
catch
?(java.io.FileNotFoundException?e)?{?
e.printStackTrace(System.err);?
}?
FileChannel?outChannel
=
outputFile.getChannel();?
try
{?
if
(outChannel.size()
%
2
!=
0
){?
ByteBuffer?bufTemp
=
ByteBuffer.allocate(
1
);?
bufTemp.put((
byte
)
32
);?
bufTemp.flip();?
outChannel.position(outChannel.size());?
outChannel.write(bufTemp);?
bufTemp.clear();?
}?
}
catch
(Exception?ex){?
ex.printStackTrace(System.err);?
System.exit(
1
);?
}?
FileInputStream?inFile
=
null
;?
try
{?
inFile
=
new
?FileInputStream(srcFile);?
}
catch
(java.io.FileNotFoundException?e){?
e.printStackTrace(System.err);?
//
System.exit(1);?
}?
outputFile
=
null
;?
try
?{?
outputFile
=
new
?FileOutputStream(destFile,
true
);?
}
catch
?(java.io.FileNotFoundException?e)?{?
e.printStackTrace(System.err);?
}?
FileChannel?inChannel
=
inFile.getChannel();?
outChannel
=
outputFile.getChannel();?
ByteBuffer?inBuf
=
ByteBuffer.allocate(
8
);?
ByteBuffer?outBuf
=
ByteBuffer.allocate(
8
);?
try
{?
String?srcStr;?
String?destStr;?
while
(
true
){?
if
?(replenish(inChannel,inBuf)
==-
1
)?
break
;?
srcStr
=
((ByteBuffer)(inBuf.flip())).asCharBuffer().toString();?
inBuf.clear();?
if
?(flag)?
destStr
=
des.enc(srcStr,srcStr.length());?
else
?
destStr
=
des.dec(srcStr,srcStr.length());?
outBuf.clear();?
if
?(destStr.length()
==
4
){?
for
?(
int
?i?
=
?
0
;?i
<
4
;?i
++
)?{?
outBuf.putChar(destStr.charAt(i));?
}?
outBuf.flip();?
}
else
{?
outBuf.position(
0
);?
outBuf.limit(
2
*
destStr.length());?
for
?(
int
?i?
=
?
0
;?i
<
destStr.length();?i
++
)?{?
outBuf.putChar(destStr.charAt(i));?
}?
outBuf.flip();?
}?
try
?{?
outChannel.write(outBuf);?
outBuf.clear();?
}
catch
?(java.io.IOException?ex)?{?
ex.printStackTrace(System.err);?
}?
}?
System.out.println?(inChannel.size());?
System.out.println?(outChannel.size());?
System.out.println?(
"
EoF?reached.
"
);?
inFile.close();?
outputFile.close();?
}
catch
(java.io.IOException?e){?
e.printStackTrace(System.err);?
System.exit(
1
);?
}?
}?
public
?FileDES(String?srcFileName,String?destFileName,String?inKey,
boolean
?actionType){?
this
.srcFileName
=
srcFileName;?
this
.destFileName
=
destFileName;?
this
.actionType
=
actionType;?
analyzePath();?
srcFile
=
new
?File(srcFileName);?
destFile
=
new
?File(destFileName);?
this
.inKey
=
inKey;?
if
?(actionType
==
enc)?
file_operate(enc);?
else
?
file_operate(dec);?
}?
public
?
static
?
void
?main(String[]?args){?
String?file1
=
System.getProperty(
"
user.dir
"
)
+
"
/111.doc
"
;?
String?file2
=
System.getProperty(
"
user.dir
"
)
+
"
/222.doc
"
;?
String?file3
=
System.getProperty(
"
user.dir
"
)
+
"
/333.doc
"
;?
String?passWord
=
"
1234ABCD
"
;?
FileDES?fileDes
=
new
?FileDES(file1,file2,passWord,
true
);?
FileDES?fileDes1
=
new
?FileDES(file2,file3,passWord,
false
);?
}