package tcl.util; import java.io.*; // needed only for main() method./** * 将字符串用64位加密算法加密 * Title: 销售自动化软件 * Description: 实现销售人员能够将销售过程通过一个软件就能管理起来。同时相互之间能够共享信息。 * 兼容以前的ACT,OUTLOOK软件。 * 与OFFICE软件集成。 * Copyright: Copyright (c) 2001 * Company: TCL企业软件有限责任公司 * @author TONY.郑 * @date 17 March 2000 * @version 1.0 *///////////////////////license & copyright header///////////////////////// // // // Base64 - encode/decode data using the Base64 encoding scheme // // // // Copyright (c) 1998 by Kevin Kelley // // // // This library is free software; you can redistribute it and/or // // modify it under the terms of the GNU Lesser General Public // // License as published by the Free Software Foundation; either // // version 2.1 of the License, or (at your option) any later version. // // // // This library is distributed in the hope that it will be useful, // // but WITHOUT ANY WARRANTY; without even the implied warranty of // // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // // GNU Lesser General Public License for more details. // // // // You should have received a copy of the GNU Lesser General Public // // License along with this library; if not, write to the Free Software // // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // // 02111-1307, USA, or contact the author: // // // // Kevin Kelley <[email protected]> - 30718 Rd. 28, La Junta, CO, // // 81050 USA. // // // ////////////////////end license & copyright header/////////////////////// import java.io.*; // needed only for main() method. /** * Provides encoding of raw bytes to base64-encoded characters, and * decoding of base64 characters to raw bytes. * 用于加密算法,64位加密软件 * @author Kevin Kelley ([email protected]) * @version 1.3 * @date 06 August 1998 * @modified 14 February 2000 * @modified 22 September 2000 */public class Base64 {/** * returns an array of base64-encoded characters to represent the * passed data array. * * @param data the array of bytes to encode * @return base64-coded character array. */ static public char[] encode(byte[] data) { char[] out = new char[((data.length + 2) / 3) * 4]; // // 3 bytes encode to 4 chars. Output is always an even // multiple of 4 characters. // for (int i=0, index=0; i<data.length; i+=3, index+=4) { boolean quad = false; boolean trip = false; int val = (0xFF & (int) data[i]); val <<= 8; if ((i+1) < data.length) { val |= (0xFF & (int) data[i+1]); trip = true; } val <<= 8; if ((i+2) < data.length) { val |= (0xFF & (int) data[i+2]); quad = true; } out[index+3] = alphabet[(quad? (val & 0x3F): 64)]; val >>= 6; out[index+2] = alphabet[(trip? (val & 0x3F): 64)]; val >>= 6; out[index+1] = alphabet[val & 0x3F]; val >>= 6; out[index+0] = alphabet[val & 0x3F]; } return out; } /** * Decodes a BASE-64 encoded stream to recover the original * data. White space before and after will be trimmed away, * but no other manipulation of the input will be performed. * * As of version 1.2 this method will properly handle input * containing junk characters (newlines and the like) rather * than throwing an error. It does this by pre-parsing the * input and generating from that a count of VALID input * characters. **/ static public byte[] decode(char[] data) { // as our input could contain non-BASE64 data (newlines, // whitespace of any sort, whatever) we must first adjust // our count of USABLE data so that... // (a) we don't misallocate the output array, and // (b) think that we miscalculated our data length // just because of extraneous throw-away junk int tempLen = data.length; for( int ix=0; ix<data.length; ix++ ) { if( (data[ix] > 255) || codes[ data[ix] ] < 0 ) --tempLen; // ignore non-valid chars and padding } // calculate required length: // -- 3 bytes for every 4 valid base64 chars // -- plus 2 bytes if there are 3 extra base64 chars, // or plus 1 byte if there are 2 extra. int len = (tempLen / 4) * 3; if ((tempLen % 4) == 3) len += 2; if ((tempLen % 4) == 2) len += 1; byte[] out = new byte[len]; int shift = 0; // # of excess bits stored in accum int accum = 0; // excess bits int index = 0; // we now go through the entire array (NOT using the 'tempLen' value) for (int ix=0; ix<data.length; ix++) { int value = (data[ix]>255)? -1: codes[ data[ix] ]; if ( value >= 0 ) // skip over non-code { accum <<= 6; // bits shift up by 6 each time thru shift += 6; // loop, with new bits being put in accum |= value; // at the bottom. if ( shift >= 8 ) // whenever there are 8 or more shifted in, { shift -= 8; // write them out (from the top, leaving any out[index++] = // excess at the bottom for next iteration. (byte) ((accum >> shift) & 0xff); } } // we will also have skipped processing a padding null byte ('=') here; // these are used ONLY for padding to an even length and do not legally // occur as encoded data. for this reason we can ignore the fact that // no index++ operation occurs in that special case: the out[] array is // initialized to all-zero bytes to start with and that works to our // advantage in this combination. } // if there is STILL something wrong we just have to throw up now! if( index != out.length) { throw new Error("Miscalculated data length (wrote " + index + " instead of " + out.length + ")"); } return out; } // // code characters for values 0..63 // static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" .toCharArray();// // lookup table for converting base64 characters to value in range 0..63 // static private byte[] codes = new byte[256]; static { for (int i=0; i<256; i++) codes[i] = -1; for (int i = 'A'; i <= 'Z'; i++) codes[i] = (byte)( i - 'A'); for (int i = 'a'; i <= 'z'; i++) codes[i] = (byte)(26 + i - 'a'); for (int i = '0'; i <= '9'; i++) codes[i] = (byte)(52 + i - '0'); codes['+'] = 62; codes['/'] = 63; } /////////////////////////////////////////////////// // remainder (main method and helper functions) is // for testing purposes only, feel free to clip it. ///////////////////////////////////////////////////public static void main(String[] args) { boolean decode = false; if (args.length == 0) { System.out.println("usage: java Base64 [-d[ecode]] filename"); System.exit(0); } for (int i=0; i<args.length; i++) { if ("-decode".equalsIgnoreCase(args[i])) decode = true; else if ("-d".equalsIgnoreCase(args[i])) decode = true; } String filename = args[args.length-1]; File file = new File(filename); if (!file.exists()) { System.out.println("Error: file '" + filename + "' doesn't exist!"); System.exit(0); } if (decode) { char[] encoded = readChars(file); byte[] decoded = decode(encoded); writeBytes(file, decoded); } else { byte[] decoded = readBytes(file); char[] encoded = encode(decoded); writeChars(file, encoded); } }private static byte[] readBytes(File file) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { InputStream fis = new FileInputStream(file); InputStream is = new BufferedInputStream(fis); int count = 0; byte[] buf = new byte[16384]; while ((count=is.read(buf)) != -1) { if (count > 0) baos.write(buf, 0, count); } is.close(); } catch (Exception e) { e.printStackTrace(); } return baos.toByteArray(); }private static char[] readChars(File file) { CharArrayWriter caw = new CharArrayWriter(); try { Reader fr = new FileReader(file); Reader in = new BufferedReader(fr); int count = 0; char[] buf = new char[16384]; while ((count=in.read(buf)) != -1) { if (count > 0) caw.write(buf, 0, count); } in.close(); } catch (Exception e) { e.printStackTrace(); } return caw.toCharArray(); }private static void writeBytes(File file, byte[] data) { try { OutputStream fos = new FileOutputStream(file); OutputStream os = new BufferedOutputStream(fos); os.write(data); os.close(); } catch (Exception e) { e.printStackTrace(); } }private static void writeChars(File file, char[] data) { try { Writer fos = new FileWriter(file); Writer os = new BufferedWriter(fos); os.write(data); os.close(); } catch (Exception e) { e.printStackTrace(); } } /////////////////////////////////////////////////// // end of test code. ///////////////////////////////////////////////////}
import java.io.*; // needed only for main() method./**
* 将字符串用64位加密算法加密
* Title: 销售自动化软件
* Description: 实现销售人员能够将销售过程通过一个软件就能管理起来。同时相互之间能够共享信息。
* 兼容以前的ACT,OUTLOOK软件。
* 与OFFICE软件集成。
* Copyright: Copyright (c) 2001
* Company: TCL企业软件有限责任公司
* @author TONY.郑
* @date 17 March 2000
* @version 1.0
*///////////////////////license & copyright header/////////////////////////
// //
// Base64 - encode/decode data using the Base64 encoding scheme //
// //
// Copyright (c) 1998 by Kevin Kelley //
// //
// This library is free software; you can redistribute it and/or //
// modify it under the terms of the GNU Lesser General Public //
// License as published by the Free Software Foundation; either //
// version 2.1 of the License, or (at your option) any later version. //
// //
// This library is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU Lesser General Public License for more details. //
// //
// You should have received a copy of the GNU Lesser General Public //
// License along with this library; if not, write to the Free Software //
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA //
// 02111-1307, USA, or contact the author: //
// //
// Kevin Kelley <[email protected]> - 30718 Rd. 28, La Junta, CO, //
// 81050 USA. //
// //
////////////////////end license & copyright header///////////////////////
import java.io.*; // needed only for main() method.
/**
* Provides encoding of raw bytes to base64-encoded characters, and
* decoding of base64 characters to raw bytes.
* 用于加密算法,64位加密软件
* @author Kevin Kelley ([email protected])
* @version 1.3
* @date 06 August 1998
* @modified 14 February 2000
* @modified 22 September 2000
*/public class Base64 {/**
* returns an array of base64-encoded characters to represent the
* passed data array.
*
* @param data the array of bytes to encode
* @return base64-coded character array.
*/
static public char[] encode(byte[] data)
{
char[] out = new char[((data.length + 2) / 3) * 4]; //
// 3 bytes encode to 4 chars. Output is always an even
// multiple of 4 characters.
//
for (int i=0, index=0; i<data.length; i+=3, index+=4) {
boolean quad = false;
boolean trip = false; int val = (0xFF & (int) data[i]);
val <<= 8;
if ((i+1) < data.length) {
val |= (0xFF & (int) data[i+1]);
trip = true;
}
val <<= 8;
if ((i+2) < data.length) {
val |= (0xFF & (int) data[i+2]);
quad = true;
}
out[index+3] = alphabet[(quad? (val & 0x3F): 64)];
val >>= 6;
out[index+2] = alphabet[(trip? (val & 0x3F): 64)];
val >>= 6;
out[index+1] = alphabet[val & 0x3F];
val >>= 6;
out[index+0] = alphabet[val & 0x3F];
}
return out;
} /**
* Decodes a BASE-64 encoded stream to recover the original
* data. White space before and after will be trimmed away,
* but no other manipulation of the input will be performed.
*
* As of version 1.2 this method will properly handle input
* containing junk characters (newlines and the like) rather
* than throwing an error. It does this by pre-parsing the
* input and generating from that a count of VALID input
* characters.
**/
static public byte[] decode(char[] data)
{
// as our input could contain non-BASE64 data (newlines,
// whitespace of any sort, whatever) we must first adjust
// our count of USABLE data so that...
// (a) we don't misallocate the output array, and
// (b) think that we miscalculated our data length
// just because of extraneous throw-away junk int tempLen = data.length;
for( int ix=0; ix<data.length; ix++ )
{
if( (data[ix] > 255) || codes[ data[ix] ] < 0 )
--tempLen; // ignore non-valid chars and padding
}
// calculate required length:
// -- 3 bytes for every 4 valid base64 chars
// -- plus 2 bytes if there are 3 extra base64 chars,
// or plus 1 byte if there are 2 extra. int len = (tempLen / 4) * 3;
if ((tempLen % 4) == 3) len += 2;
if ((tempLen % 4) == 2) len += 1; byte[] out = new byte[len]; int shift = 0; // # of excess bits stored in accum
int accum = 0; // excess bits
int index = 0; // we now go through the entire array (NOT using the 'tempLen' value)
for (int ix=0; ix<data.length; ix++)
{
int value = (data[ix]>255)? -1: codes[ data[ix] ]; if ( value >= 0 ) // skip over non-code
{
accum <<= 6; // bits shift up by 6 each time thru
shift += 6; // loop, with new bits being put in
accum |= value; // at the bottom.
if ( shift >= 8 ) // whenever there are 8 or more shifted in,
{
shift -= 8; // write them out (from the top, leaving any
out[index++] = // excess at the bottom for next iteration.
(byte) ((accum >> shift) & 0xff);
}
}
// we will also have skipped processing a padding null byte ('=') here;
// these are used ONLY for padding to an even length and do not legally
// occur as encoded data. for this reason we can ignore the fact that
// no index++ operation occurs in that special case: the out[] array is
// initialized to all-zero bytes to start with and that works to our
// advantage in this combination.
} // if there is STILL something wrong we just have to throw up now!
if( index != out.length)
{
throw new Error("Miscalculated data length (wrote " + index + " instead of " + out.length + ")");
} return out;
}
//
// code characters for values 0..63
//
static private char[] alphabet =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
.toCharArray();//
// lookup table for converting base64 characters to value in range 0..63
//
static private byte[] codes = new byte[256];
static {
for (int i=0; i<256; i++) codes[i] = -1;
for (int i = 'A'; i <= 'Z'; i++) codes[i] = (byte)( i - 'A');
for (int i = 'a'; i <= 'z'; i++) codes[i] = (byte)(26 + i - 'a');
for (int i = '0'; i <= '9'; i++) codes[i] = (byte)(52 + i - '0');
codes['+'] = 62;
codes['/'] = 63;
}
///////////////////////////////////////////////////
// remainder (main method and helper functions) is
// for testing purposes only, feel free to clip it.
///////////////////////////////////////////////////public static void main(String[] args)
{
boolean decode = false; if (args.length == 0) {
System.out.println("usage: java Base64 [-d[ecode]] filename");
System.exit(0);
}
for (int i=0; i<args.length; i++) {
if ("-decode".equalsIgnoreCase(args[i])) decode = true;
else if ("-d".equalsIgnoreCase(args[i])) decode = true;
} String filename = args[args.length-1];
File file = new File(filename);
if (!file.exists()) {
System.out.println("Error: file '" + filename + "' doesn't exist!");
System.exit(0);
} if (decode)
{
char[] encoded = readChars(file);
byte[] decoded = decode(encoded);
writeBytes(file, decoded);
}
else
{
byte[] decoded = readBytes(file);
char[] encoded = encode(decoded);
writeChars(file, encoded);
}
}private static byte[] readBytes(File file)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try
{
InputStream fis = new FileInputStream(file);
InputStream is = new BufferedInputStream(fis);
int count = 0;
byte[] buf = new byte[16384];
while ((count=is.read(buf)) != -1) {
if (count > 0) baos.write(buf, 0, count);
}
is.close();
}
catch (Exception e) { e.printStackTrace(); } return baos.toByteArray();
}private static char[] readChars(File file)
{
CharArrayWriter caw = new CharArrayWriter();
try
{
Reader fr = new FileReader(file);
Reader in = new BufferedReader(fr);
int count = 0;
char[] buf = new char[16384];
while ((count=in.read(buf)) != -1) {
if (count > 0) caw.write(buf, 0, count);
}
in.close();
}
catch (Exception e) { e.printStackTrace(); } return caw.toCharArray();
}private static void writeBytes(File file, byte[] data) {
try {
OutputStream fos = new FileOutputStream(file);
OutputStream os = new BufferedOutputStream(fos);
os.write(data);
os.close();
}
catch (Exception e) { e.printStackTrace(); }
}private static void writeChars(File file, char[] data) {
try {
Writer fos = new FileWriter(file);
Writer os = new BufferedWriter(fos);
os.write(data);
os.close();
}
catch (Exception e) { e.printStackTrace(); }
}
///////////////////////////////////////////////////
// end of test code.
///////////////////////////////////////////////////}
发现只要是ascii字符的encode都没问题
但如果是中文的字符串就会出乱码或者其他东西
怎么解决这个问题
请指教,谢谢
谢谢你们提供的资料,但还是有一些问题,首先
路人甲提供的资料只可以解决英文字符和数字等ascii字符的base64编码
遇到中文字符就不行了,编出来的是乱78糟的东西
能不能继续提供资料?谢谢路人甲了
小为提供的资料,我有点疑惑,因为我的输入是一个字符串,
最重要的是字符串里有中文!!!!!!!!!!!!!!
完全按照你的encode()方法去做的话,事先还得把string转换成byte[],如
string mystr1="小为,你好,能继续帮忙吗,谢谢!";
byte[] mystr2=mystr1.toByteArray();
......
string mystr3=xxx.encode(mystr2);
编译时的提示信息为D:\example\java>javac add.java
add.java:45: 不能解析符号
符号:方法 toByteArray ()
位置:类 in java.lang.String
byte[] mystr2=mystr1.toByteArray();
^
add.java:47: 不兼容的类型
发现:char[]
需要:java.lang.String
mystr3=xxx.encode(mystr2);
^
2 个错误D:\example\java>
希望二位能继续指点,万分谢谢
{//把字符串转换成BASE64格式
String code64 = new sun.misc.BASE64Encoder().encode(code32.getBytes());
return code64;
}//把BASE64格式转换成字符串
try
{
ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(code64.getBytes());
Object obj = new Object();
if( codeFlag.equals( "base64" ) )
obj = new BASE64DecoderStream(bytearrayinputstream);
//else if( codeFlag.equals( "quoted" ) )
//obj = new QDecoderStream(bytearrayinputstream);
int k = bytearrayinputstream.available();
byte abyte0[] = new byte[k];
k = ((InputStream) (obj)).read(abyte0, 0, k);
code64 = new String(abyte0, 0, k );
}catch( Exception ex ){}
加入后import com.sun.mail.util.*;
编译提示
D:\example\java>javac add.java
add.java:4: 包 com.sun.mail.util 不存在
import com.sun.mail.util.*;
^该怎么办?谢谢