Question

我正在使用PdfBox生成包含模板的pdf，该模板必须用于我想要生成的每个Pdf。

但是当我尝试加载模板pdf并希望在其中写入内容时，之前的所有包含都被删除了。

所以我想要显示两个内容。

请为此建议任何解决方案。

以下是我要做的代码：

//Loading an existing document 
File file = new File("/home/spaneos/ScoringReports-TM-110617.pdf"); 
PDDocument document = PDDocument.load(file); 

//Retrieving the pages of the document 
PDPage page = document.getPage(0);
PDPageContentStream contentStream = new PDPageContentStream(document, page);
//Begin the Content stream 
contentStream.beginText(); 

//Setting the font to the Content stream
contentStream.setFont( PDType1Font.TIMES_ROMAN, 16 );

//Setting the leading
contentStream.setLeading(14.5f);

//Setting the position for the line
contentStream.newLineAtOffset(25, 725);

String text1 = "This is an example of adding text to a page in the pdf document.we can add as many lines";
String text2 = "as we want like this using the ShowText()  method of the ContentStream class";

//Adding text in the form of string
contentStream.showText(text1);
contentStream.newLine();
contentStream.showText(text2);

//Creating PDImageXObject object
PDImageXObject pdImage = PDImageXObject.createFromFile("/home/spaneos/Downloads/man-161282_960_720.png",document);

//creating the PDPageContentStream object
PDPageContentStream contents = new PDPageContentStream(document, page);

contentStream.endText();

System.out.println("Content added");

//Closing the PDPageContentStream object
contents.close();   

//Closing the content stream
contentStream.close();

//Saving the document 
document.save(System.getProperty("user.dir").concat("/PdfBox_Examples/sample.pdf"));

//Closing the document  
document.close();

Answer 1

您可以像这样创建PDPageContentStream个实例

PDPageContentStream contentStream = new PDPageContentStream(document, page);
[...]
PDPageContentStream contents = new PDPageContentStream(document, page);

使用此构造函数创建它将用新的内容流替换任何现有的内容流。而是使用这个：

PDPageContentStream contents = new PDPageContentStream(document, page, AppendMode.APPEND, true, true);

AppendMode.APPEND这里告诉PDFBox追加新流，第一个true告诉它压缩流，第二个true告诉它重置图形状态的开头你添加的流。

此外，您并没有真正使用第二个内容流...

无法使用PDFBox

1 个答案: