问题

请帮忙解决这个问题。
同时，期待关于其他代码审查意 error exists on this page. Acrobat may not display the page correctly
d-color:#272822;">我正在使用pdfbox库的2.0版本。我必须从页面中删除所选图像并添加另一个图像。它可以正常运行。但是当我打开该文件时，会显示一个警告消息：***此页面存在错误。Acrobat可能无法正确显示页面***。如下是屏幕截图： style="color:#f92672">![错误图片][1] 下面是删除图像并添加其他图像的代码示例：（已编辑并修复） style="color:#960050;background-color:#1e0010">```java style="color:#66d9ef">public static void removeImages(String pdfFile) throws Exception { PDDocument document = PDDocument.load(new File(pdfFile)); for (PDPage page : document.getPages()) { PDResources pdResources = page.getResources(); String[] qrCodeCosName = new String[1]; pdResources.getXObjectNames().forEach(propertyName -> { if (!pdResources.isImageXObject(propertyName)) { return; } PDXObject o; try { o = pdResources.getXObject(propertyName); if (o instanceof PDImageXObject) { PDImageXObject pdImageXObject = (PDImageXObject) o; if (pdImageXObject.getMetadata() != null) { // 从资源中移除 style="color:#75715e"> ((COSDictionary) pdResources.getCOSObject().getDictionaryObject(COSName.XOBJECT)) .removeItem(propertyName); qrCodeCosName[0] = propertyName.getName(); } } } catch (IOException e) { e.printStackTrace(); } }); PDFStreamParser parser = new PDFStreamParser(page); parser.parse(); List<Object> tokens = parser.getTokens(); System.out.println("原始 tokens 大小：" + tokens.size()); List<Object> newTokens = new ArrayList<Object>(); for (int j = 0; j < tokens.size(); j++) { Object token = tokens.get(j); if (token instanceof Operator) { Operator op = (Operator) token; // 找到图像 - 删除它 style="color:#75715e"> if (op.getName().equals("Do")) { COSName cosName = (COSName) tokens.get(j - 1); if (cosName.getName().equals(qrCodeCosName[0])) { newTokens.remove(newTokens.size() - 1); continue; } } newTokens.add(token); } System.out.println("tokens 大小：" + newTokens.size()); PDStream newContents = new PDStream(document); OutputStream out = newContents.createOutputStream(); ContentStreamWriter writer = new ContentStreamWriter(out); writer.writeTokens(newTokens); out.close(); page.setContents(newContents); // 添加其他图像 style="color:#75715e"> PDImageXObject pdImage = PDImageXObject.createFromFile("D:\\copy\\ind.png", document); PDPageContentStream contents = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.PREPEND, true, true); contents.saveGraphicsState(); // 在PDF文档中绘制图像 style="color:#75715e"> contents.drawImage(pdImage, 0, 0, 50, 30); contents.restoreGraphicsState(); System.out.println("成功插入图像。"); // 关闭 PDPageContentStream 对象 style="color:#75715e"> contents.close(); } document.save("RemoveImage.pdf"); document.close(); } style="color:#f92672">} 见，以使此操作正常运行。



[1]: https://i.stack.imgur.com/VJaec.png
<details>
<summary>英文:</summary>
I am using the pdfbox library 2.0 version. I have to remove the selected image from the page and add another image. It works properly. But when I open that file it shows a warning message: ***An error exists on this page. Acrobat may not display the page correctly***. and the screenshot is as below: 
![Error Image][1]
Herewith sharing the code to delete an image and add other image:**(EDITTED with Fix)**
public static void removeImages(String pdfFile) throws Exception {
PDDocument document = PDDocument.load(new File(pdfFile));
for (PDPage page : document.getPages()) {
PDResources pdResources = page.getResources();
String[] qrCodeCosName = new String[1];
pdResources.getXObjectNames().forEach(propertyName -&gt; {
if (!pdResources.isImageXObject(propertyName)) {
return;
}
PDXObject o;
try {
o = pdResources.getXObject(propertyName);
if (o instanceof PDImageXObject) {
PDImageXObject pdImageXObject = (PDImageXObject) o;
if (pdImageXObject.getMetadata() != null) {
// TO REMOVE FROM RESOURCE
((COSDictionary) pdResources.getCOSObject().getDictionaryObject(COSName.XOBJECT))
.removeItem(propertyName);
qrCodeCosName[0] = propertyName.getName();
}
}
} catch (IOException e) {
e.printStackTrace();
}
});
PDFStreamParser parser = new PDFStreamParser(page);
parser.parse();
List&lt;Object&gt; tokens = parser.getTokens();
System.out.println(&quot;Original tokens size&quot; + tokens.size());
List&lt;Object&gt; newTokens = new ArrayList&lt;Object&gt;();
for (int j = 0; j &lt; tokens.size(); j++) {
Object token = tokens.get(j);
if (token instanceof Operator) {
Operator op = (Operator) token;
// find image - remove it
if (op.getName().equals(&quot;Do&quot;)) {
COSName cosName = (COSName) tokens.get(j - 1);
if (cosName.getName().equals(qrCodeCosName[0])) {
newTokens.remove(newTokens.size() - 1);
continue;
}
}
newTokens.add(token);
}
System.out.println(&quot;tokens size&quot; + newTokens.size());
PDStream newContents = new PDStream(document);
OutputStream out = newContents.createOutputStream();
ContentStreamWriter writer = new ContentStreamWriter(out);
writer.writeTokens(newTokens);
out.close();
page.setContents(newContents);
// ADD OTHER IMAGE
PDImageXObject pdImage = PDImageXObject.createFromFile(&quot;D:\\copy\\ind.png&quot;, document);
PDPageContentStream contents = new PDPageContentStream(document, page,
PDPageContentStream.AppendMode.PREPEND, true, true);
contents.saveGraphicsState();
// Drawing the image in the PDF document
contents.drawImage(pdImage, 0, 0, 50, 30);
contents.restoreGraphicsState();
System.out.println(&quot;Image inserted Successfully.&quot;);
// Closing the PDPageContentStream object
contents.close();
}
document.save(&quot;RemoveImage.pdf&quot;);
document.close();
}
}
Kindly help me with this.
**Also, looking forward for other code review comments about required changes to make this operation properly.** :)
[1]: https://i.stack.imgur.com/VJaec.png
</details>
# 答案1
**得分**: 1
根据@Tilman Hausherr的建议，以下代码适用于我：
```java
public static void removeImages(String pdfFile) throws Exception {
PDDocument document = PDDocument.load(new File(pdfFile));
for (PDPage page : document.getPages()) {
PDResources pdResources = page.getResources();
String[] qrCodeCosName = new String[1];
pdResources.getXObjectNames().forEach(propertyName -> {
if (!pdResources.isImageXObject(propertyName)) {
return;
}
PDXObject o;
try {
o = pdResources.getXObject(propertyName);
if (o instanceof PDImageXObject) {
PDImageXObject pdImageXObject = (PDImageXObject) o;
if (pdImageXObject.getMetadata() != null) {
// TO REMOVE FROM RESOURCE
((COSDictionary) pdResources.getCOSObject().getDictionaryObject(COSName.XOBJECT))
.removeItem(propertyName);
qrCodeCosName[0] = propertyName.getName();
}
}
} catch (IOException e) {
e.printStackTrace();
}
});
PDFStreamParser parser = new PDFStreamParser(page);
parser.parse();
List<Object> tokens = parser.getTokens();
System.out.println("Original tokens size" + tokens.size());
List<Object> newTokens = new ArrayList<Object>();
for (int j = 0; j < tokens.size(); j++) {
Object token = tokens.get(j);
if (token instanceof Operator) {
Operator op = (Operator) token;
// find image - remove it
if (op.getName().equals("Do")) {
COSName cosName = (COSName) tokens.get(j - 1);
if (cosName.getName().equals(qrCodeCosName[0])) {
newTokens.remove(newTokens.size() - 1);
continue;
}
}
newTokens.add(token);
}
System.out.println("tokens size" + newTokens.size());
PDStream newContents = new PDStream(document);
OutputStream out = newContents.createOutputStream();
ContentStreamWriter writer = new ContentStreamWriter(out);
writer.writeTokens(newTokens);
out.close();
page.setContents(newContents);
// ADD OTHER IMAGE
PDImageXObject pdImage = PDImageXObject.createFromFile("D:\\copy\\ind.png", document);
PDPageContentStream contents = new PDPageContentStream(document, page,
PDPageContentStream.AppendMode.PREPEND, true, true);
contents.saveGraphicsState();
// Drawing the image in the PDF document
contents.drawImage(pdImage, 0, 0, 50, 30);
contents.restoreGraphicsState();
System.out.println("Image inserted Successfully.");
// Closing the PDPageContentStream object
contents.close();
}
document.save("RemoveImage.pdf");
document.close();
}
}


英文:
As per @Tilman Hausherr suggestion below code works for me:
public static void removeImages(String pdfFile) throws Exception {
PDDocument document = PDDocument.load(new File(pdfFile));
for (PDPage page : document.getPages()) {
PDResources pdResources = page.getResources();
String[] qrCodeCosName = new String[1];
pdResources.getXObjectNames().forEach(propertyName -&gt; {
if (!pdResources.isImageXObject(propertyName)) {
return;
}
PDXObject o;
try {
o = pdResources.getXObject(propertyName);
if (o instanceof PDImageXObject) {
PDImageXObject pdImageXObject = (PDImageXObject) o;
if (pdImageXObject.getMetadata() != null) {
// TO REMOVE FROM RESOURCE
((COSDictionary) pdResources.getCOSObject().getDictionaryObject(COSName.XOBJECT))
.removeItem(propertyName);
qrCodeCosName[0] = propertyName.getName();
}
}
} catch (IOException e) {
e.printStackTrace();
}
});
PDFStreamParser parser = new PDFStreamParser(page);
parser.parse();
List&lt;Object&gt; tokens = parser.getTokens();
System.out.println(&quot;Original tokens size&quot; + tokens.size());
List&lt;Object&gt; newTokens = new ArrayList&lt;Object&gt;();
for (int j = 0; j &lt; tokens.size(); j++) {
Object token = tokens.get(j);
if (token instanceof Operator) {
Operator op = (Operator) token;
// find image - remove it
if (op.getName().equals(&quot;Do&quot;)) {
COSName cosName = (COSName) tokens.get(j - 1);
if (cosName.getName().equals(qrCodeCosName[0])) {
newTokens.remove(newTokens.size() - 1);
continue;
}
}
newTokens.add(token);
}
System.out.println(&quot;tokens size&quot; + newTokens.size());
PDStream newContents = new PDStream(document);
OutputStream out = newContents.createOutputStream();
ContentStreamWriter writer = new ContentStreamWriter(out);
writer.writeTokens(newTokens);
out.close();
page.setContents(newContents);
// ADD OTHER IMAGE
PDImageXObject pdImage = PDImageXObject.createFromFile(&quot;D:\\copy\\ind.png&quot;, document);
PDPageContentStream contents = new PDPageContentStream(document, page,
PDPageContentStream.AppendMode.PREPEND, true, true);
contents.saveGraphicsState();
// Drawing the image in the PDF document
contents.drawImage(pdImage, 0, 0, 50, 30);
contents.restoreGraphicsState();
System.out.println(&quot;Image inserted Successfully.&quot;);
// Closing the PDPageContentStream object
contents.close();
}
document.save(&quot;RemoveImage.pdf&quot;);
document.close();
}
}







通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。






						
	

点赞		

					https://go.coder-hub.com/64495532.html
复制链接
复制链接
		


go

PDFBox删除图像后出现错误 – 此页面存在错误。Acrobat可能无法正确显示页面。

问题

Java正则表达式仅返回单个匹配。

已删除的旧版本文件不会出现在垃圾箱中。

重构包含多个if条件的代码。

井字游戏数组检查游戏结束

What's the correct way to type hint an empty list as a literal in python?

如何在Highcharts Gantt中更改本地化的星期名称

如何在同一个流中使用多个过滤器和映射函数？

如何使用Map/Set来将代码优化到O(n)？

.NET MAUI Android在GitHub Actions上构建失败，错误代码为1。

如何在Playwright视觉比较中屏蔽多个定位器？

在C++中，可以使用可变模板参数来检索类型的内部类型。

selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: stale element not found

Creating and opening a URL to log in to Website via Basic Auth with Robot Framework/Selenium (Python)

AG Grid 在上下文菜单中以大文本形式打开

发表评论