到底是不是ECB模式+Pkcs7？
因为需要在别的语言中实现（js前端），需要对接后端的加密方式，这是后端的方法
不懂java，在http://tool.chacuo.net/cryptd...，都加不出相同的结果来
看上去应该是和这篇文章的方法类似，但是具体是什么加密呢？

package com.loty.crypto;

/**
 * *********************************************
 * DES 算法
 * 翻译自C语言版本。
 * ***********************************************
 */
public class Des {
    private String key = "09876543210987654321098765432109";

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    /**
     * 加密
     *
     * @param byteArray
     * @return
     */
    public byte[] encode(byte[] byteArray) {
        int iLen = byteArray.length;
        int iByteLen = ((int) Math.floor(iLen / 8) + 1) * 8;
        byte[] bEncoded = new byte[iByteLen];
        int i = ENCRYPT(key.getBytes(), byteArray, bEncoded, iLen);
        byte[] result = new byte[i];
        System.arraycopy(bEncoded, 0, result, 0, i);
        return result;
    }

    /**
     * 解密
     *
     * @param byteArray
     * @return
     */
    public byte[] decode(byte[] byteArray) {
        int iLen = byteArray.length;
        byte[] bDecoded = new byte[iLen];
        int i = DECRYPT(key.getBytes(), bDecoded, byteArray, iLen);
        int n = 0;
        while (n < i) {
            if (bDecoded[n] == 0) break;
            n++;
        }
        byte[] result = new byte[n];
        System.arraycopy(bDecoded, 0, result, 0, n);
        return result;
    }

    public String digestHexStr;
    //28
    static final int pc_1_cp[] = {
            57, 49, 41, 33, 25, 17, 9
            , 1, 58, 50, 42, 34, 26, 18
            , 10, 2, 59, 51, 43, 35, 27
            , 19, 11, 3, 60, 52, 44, 36};
    //28
    static final int pc_1_dp[] = {
            63, 55, 47, 39, 31, 23, 15
            , 7, 62, 54, 46, 38, 30, 22
            , 14, 6, 61, 53, 45, 37, 29
            , 21, 13, 5, 28, 20, 12, 4};
    //48
    static final int pc_2p[] = {
            14, 17, 11, 24, 1, 5,
            3, 28, 15, 6, 21, 10,
            23, 19, 12, 4, 26, 8,
            16, 7, 27, 20, 13, 2,
            41, 52, 31, 37, 47, 55,
            30, 40, 51, 45, 33, 48,
            44, 49, 39, 56, 34, 53,
            46, 42, 50, 36, 29, 32};
    //16
    static final int ls_countp[] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};
    //64
    static final int iip_tab_p[] = {
            58, 50, 42, 34, 26, 18, 10, 2,
            60, 52, 44, 36, 28, 20, 12, 4,
            62, 54, 46, 38, 30, 22, 14, 6,
            64, 56, 48, 40, 32, 24, 16, 8,
            57, 49, 41, 33, 25, 17, 9, 1,
            59, 51, 43, 35, 27, 19, 11, 3,
            61, 53, 45, 37, 29, 21, 13, 5,
            63, 55, 47, 39, 31, 23, 15, 7};
    //64
    static final int _iip_tab_p[] = {
            40, 8, 48, 16, 56, 24, 64, 32,
            39, 7, 47, 15, 55, 23, 63, 31,
            38, 6, 46, 14, 54, 22, 62, 30,
            37, 5, 45, 13, 53, 21, 61, 29,
            36, 4, 44, 12, 52, 20, 60, 28,
            35, 3, 43, 11, 51, 19, 59, 27,
            34, 2, 42, 10, 50, 18, 58, 26,
            33, 1, 41, 9, 49, 17, 57, 25};
    //48
    static final int e_r_p[] = {
            32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
            8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
            16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
            24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1};
    //32
    static final int local_PP[] = {
            16, 7, 20, 21, 29, 12, 28, 17,
            1, 15, 23, 26, 5, 18, 31, 10,
            2, 8, 24, 14, 32, 27, 3, 9,
            19, 13, 30, 6, 22, 11, 4, 25};
    //[8][4][16]
    static final int ccom_SSS_p[][][] = {
            {{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7},
                    {0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8},
                    {4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0},
                    {15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13}},

            {{15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10},
                    {3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5},
                    {0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15},
                    {13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9}},

            {{10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8},
                    {13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1},
                    {13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7},
                    {1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12}},

            {{7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15},
                    {13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9},
                    {10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4},
                    {3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14}}, /* err on */

            {{2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9},
                    {14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6}, /* err on */
                    {4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14},
                    {11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3}},

            {{12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11},
                    {10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8},
                    {9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6},
                    {4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13}},

            {{4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1},
                    {13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6},
                    {1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2},
                    {6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12}},

            {{13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7},
                    {1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2},
                    {7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8},
                    {2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11}}};

    byte[][] C = new byte[17][28];
    byte[][] D = new byte[17][28];
    byte[][] K = new byte[17][48];

    public Des() {
        return;
    }

    /*iu2b把int转换成byte
    */
    private static byte iu2b(int input) {
        byte output1;
        output1 = (byte) (input & 0xff);
        return output1;
    }

    /*
    b2iu把byte按照不考虑正负号的原则的＂升位＂成int程序，
    因为java没有unsigned运算
    */
    private static int b2iu(byte b) {
        return b < 0 ? b & 0x7F + 128 : b;
    }

    /*byteHEX()，用来把一个byte类型的数转换成十六进制的ASCII表示，
    　因为java中的byte的toString无法实现这一点，我们又没有C语言中的
    sprintf(outbuf,"%02X",ib)
    */
    public static String byteHEX(byte ib) {
        char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        char[] ob = new char[2];
        ob[0] = Digit[(ib >>> 4) & 0X0F];
        ob[1] = Digit[ib & 0X0F];
        String s = new String(ob);
        return s;
    }

    /* desMemcpy是一个内部使用的byte数组的块拷贝函数，
        从input的inpos开始把len长度的
        字节拷贝到output的outpos位置开始
    */
    private void desMemcpy(byte[] output, byte[] input, int outpos, int inpos, int len) {
        int i;
        for (i = 0; i < len; i++)
            output[outpos + i] = input[inpos + i];
    }

    private void Fexpand0(byte[] in, byte[] out) {
        int divide;
        int i, j;
        byte temp1;

        for (i = 0; i < 8; i++) {
            divide = 7;
            for (j = 0; j < 8; j++) {
                temp1 = in[i];
                out[8 * i + j] = iu2b((b2iu(temp1) >>> divide) & 1);
                divide--;
            }
        }
    }

    private void FLS(byte[] bits, byte[] buffer, int count) {
        int i, j;
        for (i = 0; i < 28; i++) {
            buffer[i] = bits[(i + count) % 28];
        }
    }

    private void Fson(byte[] cc, byte[] dd, byte[] kk) {
        int i, j;
        byte[] buffer = new byte[56];
        for (i = 0; i < 28; i++)
            buffer[i] = cc[i];

        for (i = 28; i < 56; i++)
            buffer[i] = dd[i - 28];

        for (i = 0; i < 48; i++)
            kk[i] = buffer[pc_2p[i] - 1];
    }

    private void Fsetkeystar(byte[] bits) {
        int i, j;

        for (i = 0; i < 28; i++)
            C[0][i] = bits[pc_1_cp[i] - 1];
        for (i = 0; i < 28; i++)
            D[0][i] = bits[pc_1_dp[i] - 1];
        for (j = 0; j < 16; j++) {
            FLS(C[j], C[j + 1], ls_countp[j]);
            FLS(D[j], D[j + 1], ls_countp[j]);
            Fson(C[j + 1], D[j + 1], K[j + 1]);
        }
    }

    private void Fiip(byte[] text, byte[] ll, byte[] rr) {
        int i, j;
        byte[] buffer = new byte[64];
        byte[] tmp = new byte[64];
        Fexpand0(text, buffer);

        for (i = 0; i < 32; i++)
            ll[i] = buffer[iip_tab_p[i] - 1];

        for (i = 0; i < 32; i++)
            rr[i] = buffer[iip_tab_p[i + 32] - 1];
    }

    private void Fs_box(byte[] aa, byte[] bb) {
        int i, j, k, m;
        int y, z;
        byte[] ss = new byte[8];
        m = 0;
        for (i = 0; i < 8; i++) {
            j = 6 * i;
            y = b2iu(aa[j]) * 2 + b2iu(aa[j + 5]);
            z = b2iu(aa[j + 1]) * 8 + b2iu(aa[j + 2]) * 4 + b2iu(aa[j + 3]) * 2 + b2iu(aa[j + 4]);
            ss[i] = iu2b(ccom_SSS_p[i][y][z]);
            y = 3;
            for (k = 0; k < 4; k++) {
                bb[m++] = iu2b((b2iu(ss[i]) >>> y) & 1);
                y--;
            }

        }
    }

    private void FF(int n, byte[] ll, byte[] rr, byte[] LL, byte[] RR) {
        int i, j;
        byte[] buffer = new byte[64], tmp = new byte[64];
        for (i = 0; i < 48; i++)
            buffer[i] = rr[e_r_p[i] - 1];
        for (i = 0; i < 48; i++)
            buffer[i] = iu2b((b2iu(buffer[i]) + b2iu(K[n][i])) & 1);

        Fs_box(buffer, tmp);

        for (i = 0; i < 32; i++)
            buffer[i] = tmp[local_PP[i] - 1];

        for (i = 0; i < 32; i++)
            RR[i] = iu2b((b2iu(buffer[i]) + b2iu(ll[i])) & 1);

        for (i = 0; i < 32; i++)
            LL[i] = rr[i];
    }

    private void _Fiip(byte[] text, byte[] ll, byte[] rr) {
        int i, j;
        byte[] tmp = new byte[64];
        for (i = 0; i < 32; i++)
            tmp[i] = ll[i];
        for (i = 32; i < 64; i++)
            tmp[i] = rr[i - 32];
        for (i = 0; i < 64; i++)
            text[i] = tmp[_iip_tab_p[i] - 1];
    }

    private void Fcompress016(byte[] out, byte[] in) {
        int times;
        int i, j;

        for (i = 0; i < 16; i++) {
            times = 3;
            in[i] = '0';
            for (j = 0; j < 4; j++) {
                in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 16 + j]) << times));
                times--;
            }
        }
    }

    void Fcompress0(byte[] out, byte[] in) {
        int times;
        int i, j;

        for (i = 0; i < 8; i++) {
            times = 7;
            in[i] = 0;
            for (j = 0; j < 8; j++) {
                in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 8 + j]) << times));
                times--;
            }
        }
    }

    private void Fencrypt0(byte[] text, byte[] mtext) {
        byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
        byte[] tmp = new byte[64];
        int i, j;
        Fiip(text, ll, rr);

        for (i = 1; i < 17; i++) {
            FF(i, ll, rr, LL, RR);
            for (j = 0; j < 32; j++) {
                ll[j] = LL[j];
                rr[j] = RR[j];
            }
        }

        _Fiip(tmp, rr, ll);

        Fcompress0(tmp, mtext);
    }

    private void FDES(byte[] key, byte[] text, byte[] mtext) {
        byte[] tmp = new byte[64];
        Fexpand0(key, tmp);
        Fsetkeystar(tmp);
        Fencrypt0(text, mtext);
    }

    /*加密*/
    public int ENCRYPT(byte[] key, byte[] s, byte[] d, int len) {
        int i, j;
        byte[] cData = new byte[8];
        byte[] cEncryptData = new byte[8];
        for (i = 0; i < len; i += 8) {
            if ((i + 8) > len) {
                desMemcpy(cData, s, 0, i, len - i);
                for (j = len - i; j < 8; j++)
                    cData[j] = 0;
            } else
                desMemcpy(cData, s, 0, i, 8);
            FDES(key, cData, cEncryptData);
            desMemcpy(d, cEncryptData, i, 0, 8);

        }
        return i;
    }

    private void Fdiscrypt0(byte[] mtext, byte[] text) {
        byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
        byte[] tmp = new byte[64];
        int i, j;
        Fiip(mtext, ll, rr);

        for (i = 16; i > 0; i--) {
            FF(i, ll, rr, LL, RR);
            for (j = 0; j < 32; j++) {
                ll[j] = LL[j];
                rr[j] = RR[j];
            }
        }

        _Fiip(tmp, rr, ll);

        Fcompress0(tmp, text);
    }

    /**
     * **************************************************************************
     * function:    DES
     * parameter:    u_char * key    ; key for encrypt
     * u_char * mtext    ; encipher data
     * u_char * text    ; plain data
     * return:    none
     * ***************************************************************************
     */
    private void _FDES(byte[] key, byte[] mtext, byte[] text) {
        byte[] tmp = new byte[64];
        Fexpand0(key, tmp);
        Fsetkeystar(tmp);
        Fdiscrypt0(mtext, text);
    }

    /*解密*/
    public int DECRYPT(byte[] key, byte[] s, byte[] d, int len) {
        int i;
        byte[] cData = new byte[8];
        byte[] cEncryptData = new byte[8];
        for (i = 0; i < len; i += 8) {
            desMemcpy(cEncryptData, d, 0, i, 8);
            _FDES(key, cEncryptData, cData);
            desMemcpy(s, cData, i, 0, 8);
        }
        return i;
    }

    public static byte[] hexStr2ByteArr(String strIn) {
        byte[] arrB = strIn.getBytes();
        int iLen = arrB.length;

        //两个字符表示一个字节，所以字节数组长度是字符串长度除以2
        byte[] arrOut = new byte[iLen / 2];
        for (int i = 0; i < iLen; i = i + 2) {
            String strTmp = new String(arrB, i, 2);
            arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
        }
        return arrOut;
    }

    public String byteArr2HexStr(byte[] arrB, int iLen) throws Exception {
        // 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍   
        StringBuffer sb = new StringBuffer(iLen * 2);
        for (int i = 0; i < iLen; i++) {
            int intTmp = arrB[i];
            while (intTmp < 0) {
                intTmp = intTmp + 256;
            }
            if (intTmp < 16) {
                sb.append("0");
            }
            sb.append(Integer.toString(intTmp, 16));
        }
        String result = sb.toString();
        return result;
    }
}