请问是否能把一个图片存入XML文档中，不是保存图片路径哟！是整个图片！

转换成base64编码（org.apache.soap.encoding.soapenc.Base64），然后将像字符串一样加到xml里，太残忍了！

我相信XML可以做的。因为XML数据本身就相当于DATABASE,XPATH就是SQL。
但问题是，能实现的不一定是最优的。
试问有必要用数据库来存图片数据吗？我想一般情况答案应该是否定的。
因为这样会使数据文件大大增大，不利于信息的检索和传递。
当然也会有特殊情况，那就要看具体情况再做决定了。

可以没问题
方法也很多.
1.保存二进制的数据
2.保存字符，用File读出来放到xml中
3.保存像素点.

package com.cnjava.util;/**
* This class provides encode/decode for RFC 2045 Base64 as defined by
* RFC 2045, N. Freed and N. Borenstein.  <a
* href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a>:
* <a href="http://www.cn-java.com">代码下载</a>:

* @author jackliu 2001.11
*/
public final class  Base64
{
    static private final int  BASELENGTH         = 255;
    static private final int  LOOKUPLENGTH       = 64;
    static private final int  TWENTYFOURBITGROUP = 24;
    static private final int  EIGHTBIT           = 8;
    static private final int  SIXTEENBIT         = 16;
    static private final int  SIXBIT             = 6;
    static private final int  FOURBYTE           = 4;
    static private final int  SIGN               = -128;
    static private final byte PAD                = (byte) '=';
    static private byte [] base64Alphabet       = new byte[BASELENGTH];
    static private byte [] lookUpBase64Alphabet = new byte[LOOKUPLENGTH];    static
    {
        for (int i = 0; i < BASELENGTH; i++ )
        {
            base64Alphabet[i] = -1;
        }
        for (int i = 'Z'; i >= 'A'; i--)
        {
            base64Alphabet[i] = (byte) (i - 'A');
        }
        for (int i = 'z'; i>= 'a'; i--)
        {
            base64Alphabet[i] = (byte) (i - 'a' + 26);
        }
        for (int i = '9'; i >= '0'; i--)
        {
            base64Alphabet[i] = (byte) (i - '0' + 52);
        }        base64Alphabet['+']  = 62;
        base64Alphabet['/']  = 63;        for (int i = 0; i <= 25; i++ )
            lookUpBase64Alphabet[i] = (byte) ('A' + i);        for (int i = 26,  j = 0; i <= 51; i++, j++ )
            lookUpBase64Alphabet[i] = (byte) ('a'+ j);        for (int i = 52,  j = 0; i <= 61; i++, j++ )
            lookUpBase64Alphabet[i] = (byte) ('0' + j);        lookUpBase64Alphabet[62] = (byte) '+';
        lookUpBase64Alphabet[63] = (byte) '/';
    }    public static boolean isBase64( String isValidString )
    {
        return isArrayByteBase64(isValidString.getBytes());
    }    public static boolean isBase64( byte octect )
    {
        //shall we ignore white space? JEFF??
        return (octect == PAD || base64Alphabet[octect] != -1);
    }    public static boolean isArrayByteBase64( byte[] arrayOctect )
    {
        int length = arrayOctect.length;
        if (length == 0)
        {
            // shouldn't a 0 length array be valid base64 data?
            // return false;
            return true;
        }
        for (int i=0; i < length; i++)
        {
            if ( !Base64.isBase64(arrayOctect[i]) )
                return false;
        }
        return true;
    }

/**
     * Encodes hex octects into Base64.
     *
     * @param binaryData Array containing binary data to encode.
     * @return Base64-encoded data.
     */
    public static byte[] encode( byte[] binaryData )
    {
        int      lengthDataBits    = binaryData.length*EIGHTBIT;
        int      fewerThan24bits   = lengthDataBits%TWENTYFOURBITGROUP;
        int      numberTriplets    = lengthDataBits/TWENTYFOURBITGROUP;
        byte     encodedData[]     = null;
        if (fewerThan24bits != 0)
        {
            //data not divisible by 24 bit
            encodedData = new byte[ (numberTriplets + 1 ) * 4 ];
        }
        else
        {
            // 16 or 8 bit
            encodedData = new byte[ numberTriplets * 4 ];
        }        byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;        int encodedIndex = 0;
        int dataIndex   = 0;
        int i           = 0;
        for ( i = 0; i<numberTriplets; i++ )
        {
            dataIndex = i*3;
            b1 = binaryData[dataIndex];
            b2 = binaryData[dataIndex + 1];
            b3 = binaryData[dataIndex + 2];            l  = (byte)(b2 & 0x0f);
            k  = (byte)(b1 & 0x03);            encodedIndex = i * 4;
            byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
            byte val2 = ((b2 & SIGN)==0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);
            byte val3 = ((b3 & SIGN)==0)?(byte)(b3>>6):(byte)((b3)>>6^0xfc);            encodedData[encodedIndex]   = lookUpBase64Alphabet[ val1 ];
            encodedData[encodedIndex+1] =
                lookUpBase64Alphabet[ val2 | ( k<<4 )];
            encodedData[encodedIndex+2] =
                lookUpBase64Alphabet[ (l <<2 ) | val3 ];
            encodedData[encodedIndex+3] = lookUpBase64Alphabet[ b3 & 0x3f ];
        }        // form integral number of 6-bit groups
        dataIndex    = i*3;
        encodedIndex = i*4;
        if (fewerThan24bits == EIGHTBIT )
        {
            b1 = binaryData[dataIndex];
            k = (byte) ( b1 &0x03 );
            byte val1 = ((b1 & SIGN)==0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
            encodedData[encodedIndex]     = lookUpBase64Alphabet[ val1 ];
            encodedData[encodedIndex + 1] = lookUpBase64Alphabet[ k<<4 ];
            encodedData[encodedIndex + 2] = PAD;
            encodedData[encodedIndex + 3] = PAD;
        }
        else if (fewerThan24bits == SIXTEENBIT)
        {            b1 = binaryData[dataIndex];
            b2 = binaryData[dataIndex +1 ];
            l = (byte) (b2 & 0x0f);
            k = (byte) (b1 & 0x03);            byte val1 = ((b1 & SIGN) == 0)?(byte)(b1>>2):(byte)((b1)>>2^0xc0);
            byte val2 = ((b2 & SIGN) == 0)?(byte)(b2>>4):(byte)((b2)>>4^0xf0);            encodedData[encodedIndex]     = lookUpBase64Alphabet[ val1 ];
            encodedData[encodedIndex + 1] =
                lookUpBase64Alphabet[ val2 | ( k<<4 )];
            encodedData[encodedIndex + 2] = lookUpBase64Alphabet[ l<<2 ];
            encodedData[encodedIndex + 3] = PAD;
        }        return encodedData;
    }    /**
     * Decodes Base64 data into octects
     *
     * @param binaryData Byte array containing Base64 data
     * @return Array containing decoded data.
     */
    public static byte[] decode( byte[] base64Data )
    {
        // handle the edge case, so we don't have to worry about it later
        if(base64Data.length == 0) { return new byte[0]; }        int      numberQuadruple    = base64Data.length/FOURBYTE;
        byte     decodedData[]      = null;
        byte     b1=0,b2=0,b3=0, b4=0, er0=0, er1=0;        // Throw away anything not in base64Data        int encodedIndex = 0;
        int dataIndex    = 0;
        {
            // this sizes the output array properly - rlw
            int lastData = base64Data.length;
            // ignore the '=' padding
            while (base64Data[lastData-1] == PAD)
            {
                if (--lastData == 0)
                {
                    return new byte[0];
                }
            }
            decodedData = new byte[ lastData - numberQuadruple ];
        }        for (int i = 0; i < numberQuadruple; i++)
        {
            dataIndex = i * 4;
            er0   = base64Data[dataIndex + 2];
            er1   = base64Data[dataIndex + 3];            b1 = base64Alphabet[base64Data[dataIndex]];
            b2 = base64Alphabet[base64Data[dataIndex +1]];            if (er0 != PAD && er1 != PAD)
            {
                //No PAD e.g 3cQl
                b3 = base64Alphabet[ er0 ];
                b4 = base64Alphabet[ er1 ];                decodedData[encodedIndex]   = (byte)(  b1 <<2 | b2>>4 ) ;
                decodedData[encodedIndex + 1] =
                    (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
                decodedData[encodedIndex + 2] = (byte)( b3<<6 | b4 );
            }
            else if (er0 == PAD)
            {
                //Two PAD e.g. 3c[Pad][Pad]
                decodedData[encodedIndex]   = (byte)(  b1 <<2 | b2>>4 ) ;
            }
            else if (er1 == PAD)
            {
                //One PAD e.g. 3cQ[Pad]
                b3 = base64Alphabet[ er0 ];                decodedData[encodedIndex]   = (byte)(  b1 <<2 | b2>>4 );
                decodedData[encodedIndex + 1] =
                    (byte)(((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) );
            }
            encodedIndex += 3;
        }
        return decodedData;
    }
}

有具体的方法了，不要费力讨论了:-)
http://www-900.ibm.com/developerWorks/cn/xml/x-binary/index.shtml

用castor可以实现类序列化成xml文件

调试易

请问是否能把一个图片存入XML文档中，不是保存图片路径哟！是整个图片！

解决方案 »