itextpdf 二维码[通俗易懂]

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itextpdf 二维码

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相关类与接口

BarcodeQRCode

public class BarcodeQRCode extends Barcode2D {
    ByteMatrix bm;
    Map<EncodeHintType, Object> hints;
    String code;


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构造方法

    public BarcodeQRCode(String code, Map<EncodeHintType, Object> hints) {
    public BarcodeQRCode(String content) {
    public BarcodeQRCode() {


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其他方法

    public void setCode(String code) {
    public void setHints(Map<EncodeHintType, Object> hints) {

    public void regenerate() {

    public String getCode() {
    public Rectangle getBarcodeSize() {
    public Map<EncodeHintType, Object> getHints() {
    public Rectangle getBarcodeSize(float moduleSize) {

    public Rectangle placeBarcode(PdfCanvas canvas, Color foreground) {
    public Rectangle placeBarcode(PdfCanvas canvas, Color foreground, float moduleSide) {

    public PdfFormXObject createFormXObject(Color foreground, PdfDocument document) {
    public PdfFormXObject createFormXObject(Color foreground, float moduleSize, PdfDocument document) {
    public Image createAwtImage(java.awt.Color foreground, java.awt.Color background) {

    private byte[] getBitMatrix() {

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示例

public class Test4 {

    private static final String dest = "./qrcode/1.pdf";
    private static final String dest2 = "./qrcode/2.pdf";

    public static void fun() throws Exception{  //image生成二维码，可调整二维码宽度、高度，扫描二维码会跳转到百度首页
        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(dest));
        Document document = new Document(pdfDocument);

        BarcodeQRCode barcodeQRCode = new BarcodeQRCode();
        barcodeQRCode.setCode("http://www.baidu.com");

        Image image = new Image(barcodeQRCode.createFormXObject(pdfDocument));
        image.setWidth(200);
        image.setHeight(200);
        image.setFixedPosition(100,600);
        document.add(image);

        document.close();
    }

    public static void fun2() throws Exception{  //canvas绘制二维码，扫描二维码会跳转到百度首页
        PdfDocument pdfDocument = new PdfDocument(new PdfWriter(dest2));

        BarcodeQRCode barcodeQRCode = new BarcodeQRCode();
        barcodeQRCode.setCode("http://www.baidu.com");
        PdfFormXObject object = barcodeQRCode.createFormXObject(ColorConstants.BLACK,pdfDocument);

        float x = 100;
        float y = 750;
        float width = object.getWidth();
        float height = object.getHeight();

        PdfCanvas canvas = new PdfCanvas(pdfDocument.addNewPage());
        canvas.saveState();
        canvas.setFillColor(ColorConstants.WHITE);
        canvas.rectangle(x, y, width, height);
        canvas.fill();
        canvas.restoreState();
        canvas.addXObjectAt(object, x, y);

        pdfDocument.close();
    }

    public static void main(String[] args) throws Exception{
        fun();
        fun2();
    }
}

image生成二维码

canas绘制二维码