求大佬赐教，怎么解决itext的PDF加水印的问题？？？

[shenme是快乐星球]

Exception in thread "main" java.io.IOException: trailer not found.
at com.lowagie.text.pdf.PdfReader.rebuildXref(Unknown Source)
at com.lowagie.text.pdf.PdfReader.readPdf(Unknown Source)
at com.lowagie.text.pdf.PdfReader.<init>(Unknown Source)
at com.lowagie.text.pdf.PdfReader.<init>(Unknown Source)
at testtttttt.mytestww.setWatermark(mytestww.java:52)
at testtttttt.mytestww.main(mytestww.java:34)

[街头小贩]

帮你搜索： Add Watermark to PDF Document using iText and Java

[Jazz_z]

可以尝试用spire.pdf for java来添加水印，代码参考文章