Java pdf文件书签承前缩放验证的设置方法-Java开发

很多朋友不知道是什么是书签承前缩放，简单说就是可以任意改变当前pdf文档缩放比例，点击书签后不影响其缩放比率，本文给大家介绍下Java pdf文件书签承前缩放验证的设置方法，感兴趣的朋友一起看看吧

1，什么是书签承前缩放？

换句话来说

设置了承前缩放，当你手动将page4缩放到145%，然后点击书签1，书签1定位到的page1的缩放比例也是145%

2，如何设置书签承前缩放？

使用工具：

承前缩放书签设置：

其他类型书签设置：

3，代码

3.1 书签结构：

3.2 代码


import com.aspose.pdf.*;
public class bookmark {
    public static void main(String[] args) {
        // Open document
        Document pdfDocument = new Document("D:\\chromeDownload\\测试版2.pdf");
        OutlineCollection outlines = pdfDocument.getOutlines();
        for (OutlineItemCollection outlineItem : (Iterable<OutlineItemCollection>) outlines) {
            double soureceZoom = -1;
            if (outlineItem.getDestination() != null) {
                soureceZoom = getAppointmentZoom(outlineItem.getDestination());
            } else if (outlineItem.getAction() != null) {
                soureceZoom = getAppointmentZoom(outlineItem.getAction());
            }
            if(soureceZoom == -1){
                System.out.println("书签必须承前缩放，书签名：" + outlineItem.getTitle() + "，缩放因子: " + soureceZoom);
//            System.out.println("Title : " + outlineItem.getTitle() + "，缩放因子: " + soureceZoom);
            if (outlineItem.size()>0){
                checkBookmark(outlineItem);
        }
    }
    private static void checkBookmark(OutlineItemCollection Outlines) {
    private static double getAppointmentZoom(IAppointment appointment) {
        if (appointment instanceof XYZExplicitDestination) {
            XYZExplicitDestination destination = (XYZExplicitDestination) appointment;
            return destination.getZoom();
        } else if (appointment instanceof GoToAction) {
            GoToAction goToAction = (GoToAction) appointment;
            if (goToAction.getDestination() instanceof XYZExplicitDestination) {
                XYZExplicitDestination destination = (XYZExplicitDestination) goToAction.getDestination();
                return destination.getZoom();
        } else if (appointment instanceof GoToRemoteAction) {
            GoToRemoteAction goToRemoteAction = (GoToRemoteAction) appointment;
            if (goToRemoteAction.getDestination() instanceof XYZExplicitDestination) {
                XYZExplicitDestination destination = (XYZExplicitDestination) goToRemoteAction.getDestination();
        return -1;
}

3.3 控制台输出：

注意：承前缩放的因子为 0；

4，书签的xml文件导出

4.1 代码

import com.aspose.pdf.Document;
import com.aspose.pdf.facades.PdfBookmarkEditor;
import java.io.FileNotFoundException;
public class AsposeTest {
    public static void main(String[] args) throws FileNotFoundException {
        Document document6 = new Document("D:\\测试版2.pdf");
        exportBookmarksToXML(document6);
    }
    public static void exportBookmarksToXML(Document document) throws FileNotFoundException {
        PdfBookmarkEditor pdfBookmarkEditor = new PdfBookmarkEditor();
        pdfBookmarkEditor.bindPdf(document);
        pdfBookmarkEditor.exportBookmarksToXML("D:\\测试版2.xml");
        pdfBookmarkEditor.getDocument().save();
}

4.2 导出文件：

<?xml version="1.0" encoding="iso_8859_1"?>
<Bookmark>
  <Title Open="True">&#30446;&#24405;缩放到页面级别
	  <Title Page="2 XYZ 71 769 0" Action="GoTo" Open="True">3.2.S.7 &#31283;&#23450;&#24615;承前缩放
		  <Title>3.2.S.7.1 &#31283;&#23450;&#24615;&#24635;&#32467;</Title>实际大小
		  <Title Page="5 FitBH 842" Action="GoTo">3.2.S.7.2 &#19978;&#24066;&#21518;&#31283;&#23450;&#24615;&#26041;&#26696;&#21644;&#31283;&#23450;&#24615;&#25215;&#35834;</Title>适合可见
		  <Title Page="8 XYZ 71 523 0" Action="GoTo">3.2.S.7.3 &#31283;&#23450;&#24615;&#25968;&#25454;</Title>承前缩放
	  </Title>
  </Title>
  
  <Title Page="1 XYZ 0 842 0" Action="GoTo" Open="False">&#34920;&#30446;&#24405;</Title>承前缩放
  <Title Page="1 XYZ 0 842 0" Action="GoTo" Open="False">&#22270;&#30446;&#24405;</Title>承前缩放
</Bookmark>

aspose.pdf 官网指路： https://docs.aspose.com/pdf/java/get-update-and-expand-bookmark/

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