soc/soc-modules/soc-modules-file/src/main/java/com/xunmei/file/utils/PdfPageHelperEvent.java

package com.xunmei.file.utils;

import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author jingyuanchao
 * @date 2023/12/18 20:18
 */
@NoArgsConstructor
@AllArgsConstructor
@Data
public class PdfPageHelperEvent implements PdfPageEvent {

    private Integer totalPageSize;

    private PdfWriter writer;

    private BaseFont fs;


    private Font tableFont;

    @Override
    public void onOpenDocument(PdfWriter pdfWriter, Document document) {

    }

    @Override
    public void onStartPage(PdfWriter pdfWriter, Document document) {
       /* try {
            PdfUtil.createWatermark(document,pdfWriter,tableFont,"水印测试");
        } catch (DocumentException | IOException e) {
            throw new RuntimeException(e);
        }*/
    }

    @Override
    public void onEndPage(PdfWriter pdfWriter, Document document) {
       /* PdfContentByte cb = writer.getDirectContent();// 得到层
        cb.saveState(); // 开始
        cb.beginText();
        cb.setFontAndSize(fs, 10); // Header
   *//*             float x = document.top(-20);// 位置 // 左
                cb.showTextAligned(PdfContentByte.ALIGN_LEFT, "H-Left", document.left(), x, 0); // 中
                cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "第" + writer.getCurrentPageNumber() + "页", (document.right() + document.left()) / 2, x, 0); // 右
                cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, "H-Right", document.right(), x, 0); *//*
        float y = document.bottom(-80); // 左
        cb.showTextAligned(PdfContentByte.ALIGN_LEFT, "", document.left(), y, 0); // 中
        cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "第" + writer.getCurrentPageNumber() + "页/共" + totalPageSize + "页", (document.right() + document.left()) / 2, y, 0); // 右
        cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, "", document.right(), y, 0);
        cb.endText();
        cb.restoreState();*/

        try {
            // PDF文档内容
            PdfContentByte pdfContent = writer.getDirectContent();
            pdfContent.saveState();
            pdfContent.beginText();
            int footerFontSize = 10;
            Font fontDetail = new Font(fs, footerFontSize, Font.NORMAL);
            pdfContent.setFontAndSize(fs, footerFontSize);
            // 页脚的页码 展示
            String footerNum = String.format("第%d页，共" + totalPageSize + "页", writer.getPageNumber());
            Phrase phrase = new Phrase(footerNum, fontDetail);
            // 页码的 横轴 坐标 居中
            float x = (document.left() + document.right()) / 2 + 10;
            // 页码的 纵轴 坐标
            float y = document.bottom(-20);
            // 添加文本内容，进行展示页码
            ColumnText.showTextAligned(pdfContent, Element.ALIGN_CENTER, phrase, x, y, 0);
            pdfContent.endText();
            pdfContent.restoreState();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    public void onCloseDocument(PdfWriter pdfWriter, Document document) {

    }

    @Override
    public void onParagraph(PdfWriter pdfWriter, Document document, float v) {

    }

    @Override
    public void onParagraphEnd(PdfWriter pdfWriter, Document document, float v) {

    }

    @Override
    public void onChapter(PdfWriter pdfWriter, Document document, float v, Paragraph paragraph) {

    }

    @Override
    public void onChapterEnd(PdfWriter pdfWriter, Document document, float v) {

    }

    @Override
    public void onSection(PdfWriter pdfWriter, Document document, float v, int i, Paragraph paragraph) {

    }

    @Override
    public void onSectionEnd(PdfWriter pdfWriter, Document document, float v) {

    }

    @Override
    public void onGenericTag(PdfWriter pdfWriter, Document document, Rectangle rectangle, String s) {

    }
}