相关疑难解决方法(0)

我写到现在的代码如下：

public class HeaderFooterEvent extends PdfPageEventHelper {
    @Override
    public void onStartPage(PdfWriter writer, Document document) {
    }

    @Override
    public void onEndPage(PdfWriter writer, Document document) {
        addHeader(writer, document);
        addHeader2(writer, document);
        addFooter(writer, document);
    }

    void addHeader(PdfWriter writer, Document document){
        try {
            PdfContentByte cb = writer.getDirectContent();

            // the initial rectangle defines the max size of the content
            rect = new Rectangle(10, document.getPageSize().getBottom() + 50,
                    document.getPageSize().getWidth() - 2 * 10, document.getPageSize().getTop() - 50);

     // flip the rectangle if top and bottom were switched
            rect.normalize();

            ColumnText …