pdfacroform.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

        tp.showText(text);
        tp.endText();
        tp.restoreState();
        tp.endVariableText();
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, tp);
    }

    /**
     * @param field
     * @param text
     * @param font
     * @param fontSize
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void drawMultiLineOfText(PdfFormField field, String text, BaseFont font, float fontSize, float llx, float lly, float urx, float ury) {
        PdfAppearance tp = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        PdfAppearance tp2 = (PdfAppearance)tp.getDuplicate();
        tp2.setFontAndSize(font, fontSize);
        tp2.resetRGBColorFill();
        field.setDefaultAppearanceString(tp2);
        tp.drawTextField(0f, 0f, urx - llx, ury - lly);
        tp.beginVariableText();
        tp.saveState();
        tp.rectangle(3f, 3f, urx - llx - 6f, ury - lly - 6f);
        tp.clip();
        tp.newPath();
        tp.beginText();
        tp.setFontAndSize(font, fontSize);
        tp.resetRGBColorFill();
        tp.setTextMatrix(4, 5);
        java.util.StringTokenizer tokenizer = new java.util.StringTokenizer(text, "\n");
        float yPos = ury - lly;
        while (tokenizer.hasMoreTokens()) {
            yPos -= fontSize * 1.2f;
            tp.showTextAligned(PdfContentByte.ALIGN_LEFT, tokenizer.nextToken(), 3, yPos, 0);
        }
        tp.endText();
        tp.restoreState();
        tp.endVariableText();
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, tp);
    }

    /**
     * @param name
     * @param value
     * @param status
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addCheckBox(String name, String value, boolean status, float llx, float lly, float urx, float ury) {
        PdfFormField field = PdfFormField.createCheckBox(writer);
        setCheckBoxParams(field, name, value, status, llx, lly, urx, ury);
        drawCheckBoxAppearences(field, value, llx, lly, urx, ury);
        addFormField(field);
        return field;
    }

    /**
     * @param field
     * @param name
     * @param value
     * @param status
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void setCheckBoxParams(PdfFormField field, String name, String value, boolean status, float llx, float lly, float urx, float ury) {
        field.setWidget(new Rectangle(llx, lly, urx, ury), PdfAnnotation.HIGHLIGHT_TOGGLE);
        field.setFieldName(name);
        if (status) {
            field.setValueAsName(value);
            field.setAppearanceState(value);
        }
        else {
            field.setValueAsName("Off");
            field.setAppearanceState("Off");
        }
        field.setFlags(PdfAnnotation.FLAGS_PRINT);
        field.setPage();
        field.setBorderStyle(new PdfBorderDictionary(1, PdfBorderDictionary.STYLE_SOLID));
    }

    /**
     * @param field
     * @param value
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void drawCheckBoxAppearences(PdfFormField field, String value, float llx, float lly, float urx, float ury) {
        BaseFont font = null;
        try {
            font = BaseFont.createFont(BaseFont.ZAPFDINGBATS, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
        }
        catch(Exception e) {
            throw new ExceptionConverter(e);
        }
        float size = (ury - lly);
        PdfAppearance tpOn = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        PdfAppearance tp2 = (PdfAppearance)tpOn.getDuplicate();
        tp2.setFontAndSize(font, size);
        tp2.resetRGBColorFill();
        field.setDefaultAppearanceString(tp2);
        tpOn.drawTextField(0f, 0f, urx - llx, ury - lly);
        tpOn.saveState();
        tpOn.resetRGBColorFill();
        tpOn.beginText();
        tpOn.setFontAndSize(font, size);
        tpOn.showTextAligned(PdfContentByte.ALIGN_CENTER, "4", (urx - llx) / 2, (ury - lly) / 2 - (size * 0.3f), 0);
        tpOn.endText();
        tpOn.restoreState();
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, value, tpOn);
        PdfAppearance tpOff = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        tpOff.drawTextField(0f, 0f, urx - llx, ury - lly);
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", tpOff);
    }

    /**
     * @param name
     * @param defaultValue
     * @param noToggleToOff
     * @return a PdfFormField
     */
    public PdfFormField getRadioGroup(String name, String defaultValue, boolean noToggleToOff) {
        PdfFormField radio = PdfFormField.createRadioButton(writer, noToggleToOff);
        radio.setFieldName(name);
        radio.setValueAsName(defaultValue);
        return radio;
    }

    /**
     * @param radiogroup
     */
    public void addRadioGroup(PdfFormField radiogroup) {
        addFormField(radiogroup);
    }

    /**
     * @param radiogroup
     * @param value
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addRadioButton(PdfFormField radiogroup, String value, float llx, float lly, float urx, float ury) {
        PdfFormField radio = PdfFormField.createEmpty(writer);
        radio.setWidget(new Rectangle(llx, lly, urx, ury), PdfAnnotation.HIGHLIGHT_TOGGLE);
        String name = ((PdfName)radiogroup.get(PdfName.V)).toString().substring(1);
        if (name.equals(value)) {
            radio.setAppearanceState(value);
        }
        else {
            radio.setAppearanceState("Off");
        }
        drawRadioAppearences(radio, value, llx, lly, urx, ury);
        radiogroup.addKid(radio);
        return radio;
    }

    /**
     * @param field
     * @param value
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void drawRadioAppearences(PdfFormField field, String value, float llx, float lly, float urx, float ury) {
        PdfAppearance tpOn = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        tpOn.drawRadioField(0f, 0f, urx - llx, ury - lly, true);
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, value, tpOn);
        PdfAppearance tpOff = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        tpOff.drawRadioField(0f, 0f, urx - llx, ury - lly, false);
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", tpOff);
    }

    /**
     * @param name
     * @param options
     * @param defaultValue
     * @param font
     * @param fontSize
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addSelectList(String name, String[] options, String defaultValue, BaseFont font, float fontSize, float llx, float lly, float urx, float ury) {
        PdfFormField choice = PdfFormField.createList(writer, options, 0);
        setChoiceParams(choice, name, defaultValue, llx, lly, urx, ury);
        StringBuffer text = new StringBuffer();
        for (int i = 0; i < options.length; i++) {
            text.append(options[i]).append('\n');
        }
        drawMultiLineOfText(choice, text.toString(), font, fontSize, llx, lly, urx, ury);
        addFormField(choice);
        return choice;
    }

    /**
     * @param name
     * @param options
     * @param defaultValue
     * @param font
     * @param fontSize
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addSelectList(String name, String[][] options, String defaultValue, BaseFont font, float fontSize, float llx, float lly, float urx, float ury) {
        PdfFormField choice = PdfFormField.createList(writer, options, 0);
        setChoiceParams(choice, name, defaultValue, llx, lly, urx, ury);
        StringBuffer text = new StringBuffer();
        for (int i = 0; i < options.length; i++) {
            text.append(options[i][1]).append('\n');
        }
        drawMultiLineOfText(choice, text.toString(), font, fontSize, llx, lly, urx, ury);
        addFormField(choice);
        return choice;
    }

    /**
     * @param name
     * @param options
     * @param defaultValue
     * @param editable
     * @param font
     * @param fontSize
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addComboBox(String name, String[] options, String defaultValue, boolean editable, BaseFont font, float fontSize, float llx, float lly, float urx, float ury) {
        PdfFormField choice = PdfFormField.createCombo(writer, editable, options, 0);
        setChoiceParams(choice, name, defaultValue, llx, lly, urx, ury);
        if (defaultValue == null) {
            defaultValue = options[0];
        }
        drawSingleLineOfText(choice, defaultValue, font, fontSize, llx, lly, urx, ury);
        addFormField(choice);
        return choice;
    }

    /**
     * @param name
     * @param options
     * @param defaultValue
     * @param editable
     * @param font
     * @param fontSize
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addComboBox(String name, String[][] options, String defaultValue, boolean editable, BaseFont font, float fontSize, float llx, float lly, float urx, float ury) {
        PdfFormField choice = PdfFormField.createCombo(writer, editable, options, 0);
        setChoiceParams(choice, name, defaultValue, llx, lly, urx, ury);
        String value = null;
        for (int i = 0; i < options.length; i++) {
            if (options[i][0].equals(defaultValue)) {
                value = options[i][1];
                break;
            }
        }
        if (value == null) {
            value = options[0][1];
        }
        drawSingleLineOfText(choice, value, font, fontSize, llx, lly, urx, ury);
        addFormField(choice);
        return choice;
    }

    /**
     * @param field
     * @param name
     * @param defaultValue
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void setChoiceParams(PdfFormField field, String name, String defaultValue, float llx, float lly, float urx, float ury) {
        field.setWidget(new Rectangle(llx, lly, urx, ury), PdfAnnotation.HIGHLIGHT_INVERT);
        if (defaultValue != null) {
            field.setValueAsString(defaultValue);
            field.setDefaultValueAsString(defaultValue);
        }
        field.setFieldName(name);
        field.setFlags(PdfAnnotation.FLAGS_PRINT);
        field.setPage();
        field.setBorderStyle(new PdfBorderDictionary(2, PdfBorderDictionary.STYLE_SOLID));
    }

    /**
     * @param name
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @return a PdfFormField
     */
    public PdfFormField addSignature(String name, 
                    float llx, float lly, float urx, float ury) {
        PdfFormField signature = PdfFormField.createSignature(writer);
        setSignatureParams(signature, name, llx, lly, urx, ury);
        drawSignatureAppearences(signature, llx, lly, urx, ury);
        addFormField(signature);
        return signature;
    }
    
    /**
     * @param field
     * @param name
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void setSignatureParams(PdfFormField field, String name,
                    float llx, float lly, float urx, float ury) {
        field.setWidget(new Rectangle(llx, lly, urx, ury), PdfAnnotation.HIGHLIGHT_INVERT);
        field.setFieldName(name);
        field.setFlags(PdfAnnotation.FLAGS_PRINT);
        field.setPage();
        field.setMKBorderColor(java.awt.Color.black);
        field.setMKBackgroundColor(java.awt.Color.white);
    }

    /**
     * @param field
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     */
    public void drawSignatureAppearences(PdfFormField field, 
                    float llx, float lly, float urx, float ury) {
        PdfAppearance tp = PdfAppearance.createAppearance(writer, urx - llx, ury - lly);
        tp.setGrayFill(1.0f);
        tp.rectangle(0, 0, urx - llx, ury - lly);
        tp.fill();
        tp.setGrayStroke(0);
        tp.setLineWidth(1);
        tp.rectangle(0.5f, 0.5f, urx - llx - 0.5f, ury - lly - 0.5f);
        tp.closePathStroke();
        tp.saveState();
        tp.rectangle(1, 1, urx - llx - 2, ury - lly - 2);
        tp.clip();
        tp.newPath();
        tp.restoreState();
        field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, tp);
    }
}