Apache PDFBox Java 库 - 文本未呈现

Apache PDFBox Java library- text not getting rendered

我正在使用 Apache PDFBox java 库创建 PDF。但是,我在呈现多行文本(换行)时遇到问题:

//Creating PDF document object 
PDDocument doc = new PDDocument();

//Adding the blank page to the document
doc.addPage( new PDPage() );

PDPage page = doc.getPage(0);
PDImageXObject pdImage = PDImageXObject.createFromFile("C:\Users\abc\Desktop\abc.png", doc);

PDPageContentStream contentStream = new PDPageContentStream(doc, page); 
contentStream.drawImage(pdImage, 10, 720);

//Begin the Content stream 
contentStream.beginText(); 
contentStream.newLineAtOffset(50, 735);

//Setting the font to the Content stream
contentStream.setFont( PDType1Font.TIMES_ROMAN, 16 );
contentStream. showText("ABC Management System");

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

//Setting the position for the line
contentStream.newLineAtOffset(25, 600);

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);

//Ending the content stream
contentStream.endText();

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

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

//Saving the document
doc.save("my_doc.pdf");

System.out.println("PDF created");  

//Closing the document  
doc.close();

我遇到的问题是文本的后半部分(文本 1、文本 2)没有在 PDF 文件中呈现。 pdf中只显示图片和第一行ABC Management System

为了生成多行文本,我参考了:PDFBox - Adding Multiple Lines

我不明白 setLeading 的作用,因此将其注释掉并重试,但文本仍未呈现。

newLineAtOffset() 是相对于当前文本位置的。要从 0 重新开始,最简单的方法是结束当前的文本并开始新的文本块。您当前的代码将您置于 y 1335(或略低,具体取决于前导)。