com.lowagie.text.DocumentException: Document already pre closed.
at com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:877)
at com.lowagie.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:857)
at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:195)
at com.shine.pdf.TestPdfStampSigner_G3.signPdf(TestPdfStampSigner_G3.java:280)
at com.shine.pdf.TestPdfStampSigner_G3.signPdf(TestPdfStampSigner_G3.java:220)
at com.shine.pdf.TestPdfStampSigner_G3.main(TestPdfStampSigner_G3.java:93)
这是什么问题,有谁知道??数字签名成功,都是会报此异常。请问下会有什么影响呢??