pdfwriter.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

	public static final int FitWindow = 1 << 15;
	/** A viewer preference */
	public static final int CenterWindow = 1 << 16;
	/** A viewer preference */
	public static final int DisplayDocTitle = 1 << 17;

	/** A viewer preference */
	public static final int NonFullScreenPageModeUseNone = 1 << 18;
	/** A viewer preference */
	public static final int NonFullScreenPageModeUseOutlines = 1 << 19;
	/** A viewer preference */
	public static final int NonFullScreenPageModeUseThumbs = 1 << 20;
	/** A viewer preference */
	public static final int NonFullScreenPageModeUseOC = 1 << 21;

	/** A viewer preference */
	public static final int DirectionL2R = 1 << 22;
	/** A viewer preference */
	public static final int DirectionR2L = 1 << 23;

	/** A viewer preference */
	public static final int PrintScalingNone = 1 << 24;
	
    /** @see com.lowagie.text.pdf.interfaces.PdfViewerPreferences#setViewerPreferences(int) */
    public void setViewerPreferences(int preferences) {
        pdf.setViewerPreferences(preferences);
    }

    /** @see com.lowagie.text.pdf.interfaces.PdfViewerPreferences#addViewerPreference(com.lowagie.text.pdf.PdfName, com.lowagie.text.pdf.PdfObject) */
    public void addViewerPreference(PdfName key, PdfObject value) {
    	pdf.addViewerPreference(key, value);
    }
 
//	[C4] Page labels
    
    /**
     * Use this method to add page labels
     * @param pageLabels the page labels
     */
    public void setPageLabels(PdfPageLabels pageLabels) {
        pdf.setPageLabels(pageLabels);
    }
     
//	[C5] named objects: named destinations, javascript, embedded files
     
     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param js The JavaScrip action
      */
     public void addJavaScript(PdfAction js) {
         pdf.addJavaScript(js);
     }
     
     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param code the JavaScript code
      * @param unicode select JavaScript unicode. Note that the internal
      * Acrobat JavaScript engine does not support unicode,
      * so this may or may not work for you
      */
     public void addJavaScript(String code, boolean unicode) {
         addJavaScript(PdfAction.javaScript(code, this, unicode));
     }
     
     /**
      * Use this method to adds a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param code the JavaScript code
      */
     public void addJavaScript(String code) {
         addJavaScript(code, false);
     }
     
     /**
      * Use this method to add a file attachment at the document level.
      * @param description the file description
      * @param fileStore an array with the file. If it's <CODE>null</CODE>
      * the file will be read from the disk
      * @param file the path to the file. It will only be used if
      * <CODE>fileStore</CODE> is not <CODE>null</CODE>
      * @param fileDisplay the actual file name stored in the pdf
      * @throws IOException on error
      */    
     public void addFileAttachment(String description, byte fileStore[], String file, String fileDisplay) throws IOException {
         addFileAttachment(description, PdfFileSpecification.fileEmbedded(this, file, fileDisplay, fileStore));
     }

     /**
      * Use this method to add a file attachment at the document level.
      * @param description the file description
      * @param fs the file specification
      */    
     public void addFileAttachment(String description, PdfFileSpecification fs) throws IOException {
         pdf.addFileAttachment(description, fs);
     }
     
     /**
      * Use this method to add a file attachment at the document level.
      * @param fs the file specification
      */    
     public void addFileAttachment(PdfFileSpecification fs) throws IOException {
         addFileAttachment(null, fs);
     }
     
// [C6] Actions (open and additional)

     /** action value */
     public static final PdfName DOCUMENT_CLOSE = PdfName.WC;
     /** action value */
     public static final PdfName WILL_SAVE = PdfName.WS;
     /** action value */
     public static final PdfName DID_SAVE = PdfName.DS;
     /** action value */
     public static final PdfName WILL_PRINT = PdfName.WP;
     /** action value */
     public static final PdfName DID_PRINT = PdfName.DP;
     
    /** @see com.lowagie.text.pdf.interfaces.PdfDocumentActions#setOpenAction(java.lang.String) */
    public void setOpenAction(String name) {
         pdf.setOpenAction(name);
     }

    /** @see com.lowagie.text.pdf.interfaces.PdfDocumentActions#setOpenAction(com.lowagie.text.pdf.PdfAction) */
    public void setOpenAction(PdfAction action) {
         pdf.setOpenAction(action);
     }
     
    /** @see com.lowagie.text.pdf.interfaces.PdfDocumentActions#setAdditionalAction(com.lowagie.text.pdf.PdfName, com.lowagie.text.pdf.PdfAction) */
    public void setAdditionalAction(PdfName actionType, PdfAction action) throws DocumentException {
         if (!(actionType.equals(DOCUMENT_CLOSE) ||
         actionType.equals(WILL_SAVE) ||
         actionType.equals(DID_SAVE) ||
         actionType.equals(WILL_PRINT) ||
         actionType.equals(DID_PRINT))) {
             throw new DocumentException("Invalid additional action type: " + actionType.toString());
         }
         pdf.addAdditionalAction(actionType, action);
     }
    
// 	[C7] portable collections

    /**
     * Use this method to add the Collection dictionary.
     * @param collection a dictionary of type PdfCollection
     */
    public void setCollection(PdfCollection collection) {
    	setAtLeastPdfVersion(VERSION_1_7);
    	pdf.setCollection(collection);
    }
    
//	[C8] AcroForm

	/** signature value */
	public static final int SIGNATURE_EXISTS = 1;
	/** signature value */
	public static final int SIGNATURE_APPEND_ONLY = 2;
	
    /** @see com.lowagie.text.pdf.interfaces.PdfAnnotations#getAcroForm() */
    public PdfAcroForm getAcroForm() {
        return pdf.getAcroForm();
    }
    
    /** @see com.lowagie.text.pdf.interfaces.PdfAnnotations#addAnnotation(com.lowagie.text.pdf.PdfAnnotation) */
    public void addAnnotation(PdfAnnotation annot) {
        pdf.addAnnotation(annot);
    }
    
    void addAnnotation(PdfAnnotation annot, int page) {
        addAnnotation(annot);
    }
    
    /** @see com.lowagie.text.pdf.interfaces.PdfAnnotations#addCalculationOrder(com.lowagie.text.pdf.PdfFormField) */
    public void addCalculationOrder(PdfFormField annot) {
        pdf.addCalculationOrder(annot);
    }
    
    /** @see com.lowagie.text.pdf.interfaces.PdfAnnotations#setSigFlags(int) */
    public void setSigFlags(int f) {
        pdf.setSigFlags(f);
    }

//	[C9] Metadata
    
    /** XMP Metadata for the document. */
    protected byte[] xmpMetadata = null;
    
	/**
	 * Use this method to set the XMP Metadata.
	 * @param xmpMetadata The xmpMetadata to set.
	 */
	public void setXmpMetadata(byte[] xmpMetadata) {
		this.xmpMetadata = xmpMetadata;
	}
	
	/**
	 * Use this method to creates XMP Metadata based
	 * on the metadata in the PdfDocument.
	 */
	public void createXmpMetadata() {
		setXmpMetadata(createXmpMetadataBytes());
	}
	
    /**
	 * @return an XmpMetadata byte array
	 */
	private byte[] createXmpMetadataBytes() {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
	    try {
	    	XmpWriter xmp = new XmpWriter(baos, pdf.getInfo());
	        xmp.close();
	    }
	    catch(IOException ioe) {
	        ioe.printStackTrace();
	    }
	    return baos.toByteArray();
	}
    
//	[C10] PDFX Conformance
    /** A PDF/X level. */
    public static final int PDFXNONE = 0;
    /** A PDF/X level. */
    public static final int PDFX1A2001 = 1;
    /** A PDF/X level. */
    public static final int PDFX32002 = 2;
    
    /** Stores the PDF/X level. */
    private PdfXConformanceImp pdfxConformance = new PdfXConformanceImp();
    
    /** @see com.lowagie.text.pdf.interfaces.PdfXConformance#setPDFXConformance(int) */
    public void setPDFXConformance(int pdfx) {
        if (pdfxConformance.getPDFXConformance() == pdfx)
            return;
        if (pdf.isOpen())
            throw new PdfXConformanceException("PDFX conformance can only be set before opening the document.");
        if (crypto != null)
            throw new PdfXConformanceException("A PDFX conforming document cannot be encrypted.");
        if (pdfx!= PDFXNONE)
            setPdfVersion(VERSION_1_3);
        pdfxConformance.setPDFXConformance(pdfx);
    }
 
    /** @see com.lowagie.text.pdf.interfaces.PdfXConformance#getPDFXConformance() */
    public int getPDFXConformance() {
        return pdfxConformance.getPDFXConformance();
    }
    
    /** @see com.lowagie.text.pdf.interfaces.PdfXConformance#isPdfX() */
    public boolean isPdfX() {
    	return pdfxConformance.isPdfX();
    }
     
//	[C11] Output intents
    
    /**
     * Use this method to set the values of the output intent dictionary.
     * Null values are allowed to suppress any key.
     * @param outputConditionIdentifier a value
     * @param outputCondition a value
     * @param registryName a value
     * @param info a value
     * @param destOutputProfile a value
     * @throws IOException on error
     */    
    public void setOutputIntents(String outputConditionIdentifier, String outputCondition, String registryName, String info, byte destOutputProfile[]) throws IOException {
        getExtraCatalog();
        PdfDictionary out = new PdfDictionary(PdfName.OUTPUTINTENT);
        if (outputCondition != null)
            out.put(PdfName.OUTPUTCONDITION, new PdfString(outputCondition, PdfObject.TEXT_UNICODE));
        if (outputConditionIdentifier != null)
            out.put(PdfName.OUTPUTCONDITIONIDENTIFIER, new PdfString(outputConditionIdentifier, PdfObject.TEXT_UNICODE));
        if (registryName != null)
            out.put(PdfName.REGISTRYNAME, new PdfString(registryName, PdfObject.TEXT_UNICODE));
        if (info != null)
            out.put(PdfName.INFO, new PdfString(info, PdfObject.TEXT_UNICODE));
        if (destOutputProfile != null) {
            PdfStream stream = new PdfStream(destOutputProfile);
            stream.flateCompress();
            out.put(PdfName.DESTOUTPUTPROFILE, addToBody(stream).getIndirectReference());
        }
        out.put(PdfName.S, PdfName.GTS_PDFX);
        extraCatalog.put(PdfName.OUTPUTINTENTS, new PdfArray(out));
    }
    
    /**
     * Use this method to copy the output intent dictionary
     * from another document to this one.
     * @param reader the other document
     * @param checkExistence <CODE>true</CODE> to just check for the existence of a valid output intent
     * dictionary, <CODE>false</CODE> to insert the dictionary if it exists
     * @throws IOException on error
     * @return <CODE>true</CODE> if the output intent dictionary exists, <CODE>false</CODE>
     * otherwise
     */    
    public boolean setOutputIntents(PdfReader reader, boolean checkExistence) throws IOException {
        PdfDictionary catalog = reader.getCatalog();
        PdfArray outs = (PdfArray)PdfReader.getPdfObject(catalog.get(PdfName.OUTPUTINTENTS));
        if (outs == null)
            return false;
        ArrayList arr = outs.getArrayList();
        if (arr.isEmpty())
            return false;
        PdfDictionary out = (PdfDictionary)PdfReader.getPdfObject((PdfObject)arr.get(0));
        PdfObject obj = PdfReader.getPdfObject(out.get(PdfName.S));
        if (obj == null || !PdfName.GTS_PDFX.equals(obj))
            return false;
        if (checkExistence)
            return true;
        PRStream stream = (PRStream)PdfReader.getPdfObject(out.get(PdfName.DESTOUTPUTPROFILE));
        byte destProfile[] = null;
        if (stream != null) {
            destProfile = PdfReader.getStreamBytes(stream);
        }
        setOutputIntents(getNameString(out, PdfName.OUTPUTCONDITIONIDENTIFIER), getNameString(out, PdfName.OUTPUTCONDITION),
            getNameString(out, PdfName.REGISTRYNAME), getNameString(out, PdfName.INFO), destProfile);
        return true;
    }

    private static String getNameString(PdfDictionary dic, PdfName key) {
        PdfObject obj = PdfReader.getPdfObject(dic.get(key));
        if (obj == null || !obj.isString())
            return null;
        return ((PdfString)obj).toUnicodeString();
    }
    
// PDF Objects that have an impact on the PDF body
    
//	[F1] PdfEncryptionSettings interface

	// types of encryption
	
    /** Type of encryption */
    public static final int STANDARD_ENCRYPTION_40 = 0;
    /** Type of encryption */
    public static final int STANDARD_ENCRYPTION_128 = 1;
    /** Type of encryption */
    public static final int ENCRYPTION_AES_128 = 2;
    /** Mask to separate the encryption type from the encryption mode. */
    static final int ENCRYPTION_MASK = 7;
    /** Add this to the mode to keep the