barcodeean.java

一个java操作pdf文件的开发包,很好用的.

        boolean flip = (code[0] != 0);
        int pb = 0;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 1;
        byte sequence[] = PARITYE[code[code.length - 1]];
        for (int k = 1; k < code.length - 1; ++k) {
            int c = code[k];
            byte stripes[] = BARS[c];
            if (sequence[k - 1] == (flip ? EVEN : ODD)) {
                bars[pb++] = stripes[0];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[3];
            }
            else {
                bars[pb++] = stripes[3];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[0];
            }
        }
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 1;
        return bars;
    }

    /** Creates the bars for the barcode supplemental 2.
     * @param _code the text with 2 digits
     * @return the barcode
     */    
    public static byte[] getBarsSupplemental2(String _code) {
        int code[] = new int[2];
        for (int k = 0; k < code.length; ++k)
            code[k] = _code.charAt(k) - '0';
        byte bars[] = new byte[TOTALBARS_SUPP2];
        int pb = 0;
        int parity = (code[0] * 10 + code[1]) % 4;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 2;
        byte sequence[] = PARITY2[parity];
        for (int k = 0; k < sequence.length; ++k) {
            if (k == 1) {
                bars[pb++] = 1;
                bars[pb++] = 1;
            }
            int c = code[k];
            byte stripes[] = BARS[c];
            if (sequence[k] == ODD) {
                bars[pb++] = stripes[0];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[3];
            }
            else {
                bars[pb++] = stripes[3];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[0];
            }
        }
        return bars;
    }   

    /** Creates the bars for the barcode supplemental 5.
     * @param _code the text with 5 digits
     * @return the barcode
     */    
    public static byte[] getBarsSupplemental5(String _code) {
        int code[] = new int[5];
        for (int k = 0; k < code.length; ++k)
            code[k] = _code.charAt(k) - '0';
        byte bars[] = new byte[TOTALBARS_SUPP5];
        int pb = 0;
        int parity = (((code[0] + code[2] + code[4]) * 3) + ((code[1] + code[3]) * 9)) % 10;
        bars[pb++] = 1;
        bars[pb++] = 1;
        bars[pb++] = 2;
        byte sequence[] = PARITY5[parity];
        for (int k = 0; k < sequence.length; ++k) {
            if (k != 0) {
                bars[pb++] = 1;
                bars[pb++] = 1;
            }
            int c = code[k];
            byte stripes[] = BARS[c];
            if (sequence[k] == ODD) {
                bars[pb++] = stripes[0];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[3];
            }
            else {
                bars[pb++] = stripes[3];
                bars[pb++] = stripes[2];
                bars[pb++] = stripes[1];
                bars[pb++] = stripes[0];
            }
        }
        return bars;
    }   
    
    /** Gets the maximum area that the barcode and the text, if
     * any, will occupy. The lower left corner is always (0, 0).
     * @return the size the barcode occupies.
     */    
    public Rectangle getBarcodeSize() {
        float width = 0;
        float height = barHeight;
        if (font != null) {
            if (baseline <= 0)
                height += -baseline + size;
            else
                height += baseline - font.getFontDescriptor(BaseFont.DESCENT, size);
        }
        switch (codeType) {
            case EAN13:
                width = x * (11 + 12 * 7);
                if (font != null) {
                    width += font.getWidthPoint(code.charAt(0), size);
                }
                break;
            case EAN8:
                width = x * (11 + 8 * 7);
                break;
            case UPCA:
                width = x * (11 + 12 * 7);
                if (font != null) {
                    width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(11), size);
                }
                break;
            case UPCE:
                width = x * (9 + 6 * 7);
                if (font != null) {
                    width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(7), size);
                }
                break;
            case SUPP2:
                width = x * (6 + 2 * 7);
                break;
            case SUPP5:
                width = x * (4 + 5 * 7 + 4 * 2);
                break;
            default:
                throw new RuntimeException("Invalid code type.");
        }
        return new Rectangle(width, height);
    }
    
    /** Places the barcode in a <CODE>PdfContentByte</CODE>. The
     * barcode is always placed at coodinates (0, 0). Use the
     * translation matrix to move it elsewhere.<p>
     * The bars and text are written in the following colors:<p>
     * <P><TABLE BORDER=1>
     * <TR>
     *    <TH><P><CODE>barColor</CODE></TH>
     *    <TH><P><CODE>textColor</CODE></TH>
     *    <TH><P>Result</TH>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with current fill color</TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * </TABLE>
     * @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the dimensions the barcode occupies
     */    
    public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) {
        Rectangle rect = getBarcodeSize();
        float barStartX = 0;
        float barStartY = 0;
        float textStartY = 0;
        if (font != null) {
            if (baseline <= 0)
                textStartY = barHeight - baseline;
            else {
                textStartY = -font.getFontDescriptor(BaseFont.DESCENT, size);
                barStartY = textStartY + baseline;
            }
        }
        switch (codeType) {
            case EAN13:
            case UPCA:
            case UPCE:
                if (font != null)
                    barStartX += font.getWidthPoint(code.charAt(0), size);
                break;
        }
        byte bars[] = null;
        int guard[] = GUARD_EMPTY;
        switch (codeType) {
            case EAN13:
                bars = getBarsEAN13(code);
                guard = GUARD_EAN13;
                break;
            case EAN8:
                bars = getBarsEAN8(code);
                guard = GUARD_EAN8;
                break;
            case UPCA:
                bars = getBarsEAN13("0" + code);
                guard = GUARD_UPCA;
                break;
            case UPCE:
                bars = getBarsUPCE(code);
                guard = GUARD_UPCE;
                break;
            case SUPP2:
                bars = getBarsSupplemental2(code);
                break;
            case SUPP5:
                bars = getBarsSupplemental5(code);
                break;
        }
        float keepBarX = barStartX;
        boolean print = true;
        float gd = 0;
        if (font != null && baseline > 0 && guardBars) {
            gd = baseline / 2;
        }
        if (barColor != null)
            cb.setColorFill(barColor);
        for (int k = 0; k < bars.length; ++k) {
            float w = bars[k] * x;
            if (print) {
                if (Arrays.binarySearch(guard, k) >= 0)
                    cb.rectangle(barStartX, barStartY - gd, w, barHeight + gd);
                else
                    cb.rectangle(barStartX, barStartY, w, barHeight);
            }
            print = !print;
            barStartX += w;
        }
        cb.fill();
        if (font != null) {
            if (textColor != null)
                cb.setColorFill(textColor);
            cb.beginText();
            cb.setFontAndSize(font, size);
            switch (codeType) {
                case EAN13:
                    cb.setTextMatrix(0, textStartY);
                    cb.showText(code.substring(0, 1));
                    for (int k = 1; k < 13; ++k) {
                        String c = code.substring(k, k + 1);
                        float len = font.getWidthPoint(c, size);
                        float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2;
                        cb.setTextMatrix(pX, textStartY);
                        cb.showText(c);
                    }
                    break;
                case EAN8:
                    for (int k = 0; k < 8; ++k) {
                        String c = code.substring(k, k + 1);
                        float len = font.getWidthPoint(c, size);
                        float pX = TEXTPOS_EAN8[k] * x - len / 2;
                        cb.setTextMatrix(pX, textStartY);
                        cb.showText(c);
                    }
                    break;
                case UPCA:
                    cb.setTextMatrix(0, textStartY);
                    cb.showText(code.substring(0, 1));
                    for (int k = 1; k < 11; ++k) {
                        String c = code.substring(k, k + 1);
                        float len = font.getWidthPoint(c, size);
                        float pX = keepBarX + TEXTPOS_EAN13[k] * x - len / 2;
                        cb.setTextMatrix(pX, textStartY);
                        cb.showText(c);
                    }
                    cb.setTextMatrix(keepBarX + x * (11 + 12 * 7), textStartY);
                    cb.showText(code.substring(11, 12));
                    break;
                case UPCE:
                    cb.setTextMatrix(0, textStartY);
                    cb.showText(code.substring(0, 1));
                    for (int k = 1; k < 7; ++k) {
                        String c = code.substring(k, k + 1);
                        float len = font.getWidthPoint(c, size);
                        float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2;
                        cb.setTextMatrix(pX, textStartY);
                        cb.showText(c);
                    }
                    cb.setTextMatrix(keepBarX + x * (9 + 6 * 7), textStartY);
                    cb.showText(code.substring(7, 8));
                    break;
                case SUPP2:
                case SUPP5:
                    for (int k = 0; k < code.length(); ++k) {
                        String c = code.substring(k, k + 1);
                        float len = font.getWidthPoint(c, size);
                        float pX = (7.5f + (9 * k)) * x - len / 2;
                        cb.setTextMatrix(pX, textStartY);
                        cb.showText(c);
                    }
                    break;
            }
            cb.endText();
        }
        return rect;
    }
}