I got NullPointerException in the below code,and the exception message is like
this java.lang.NullPointerException at
com.lowagie.text.pdf.PdfDocument.open(Unknown Source),I don't know why it
is,can someone help me out of this trouble?THank you very much!
Code:
PdfDocument doc = new PdfDocument();
doc.setMargins(50, 50, 50, 50);
doc.setPageSize(rect);
doc.setFooter(footer);
doc.addTitle("公证书");
doc.addAuthor("Author");
doc.addSubject("Example.");
doc.addKeywords("iText");
doc.addCreator("My program using iText");
try {
// 设置pdf文件生成路径 step2
PdfWriter.getInstance(doc, new FileOutputStream(file));
// 打开pdf文件 step3
doc.open();
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