java Java关闭PDF错误
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Java close PDF error
提问by bonsai
I have this java code:
我有这个java代码：
try {
PDFTextStripper pdfs = new PDFTextStripper();
String textOfPDF = pdfs.getText(PDDocument.load("doc"));
doc.add(new Field(campo.getDestino(),
textOfPDF,
Field.Store.NO,
Field.Index.ANALYZED));
} catch (Exception exep) {
System.out.println(exep);
System.out.println("PDF fail");
}
And throws this:
并抛出这个：
11:45:07,017 WARN [COSDocument] Warning: You did not close a PDF Document
And I don't know why but throw this 1, 2, 3, or more.
我不知道为什么，但要扔 1、2、3 或更多。
I find that COSDocument is a class and have close() method, but I don't use this class nowhere.
我发现 COSDocument 是一个类并且有 close() 方法，但我没有在任何地方使用这个类。
I have this imports:
我有这个进口：
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.util.PDFTextStripper;
Thanks :)
谢谢 ：）
回答by Jon Skeet
You're loading a PDDocumentbut not closing it. I suspect you need to do:
您正在加载PDDocument但未关闭它。我怀疑你需要做：
String textOfPdf;
PDDocument doc = PDDocument.load("doc");
try {
textOfPdf = pdfs.getText(doc);
} finally {
doc.close();
}
回答by Benjamin M
Just had this issue, too. With Java 7 you can do this:
刚好也有这个问题。使用 Java 7，您可以这样做：
try(PDDocument document = PDDocument.load(input)) {
// do something
} catch (IOException e) {
e.printStackTrace();
}
Because PDDocument implements Closeable, the tryblock will automagically call its close()method at the end.
因为PDDocument implements Closeable，try块会close()在最后自动调用它的方法。
回答by dogbane
This warning is emitted when the pdf document is finalised and hasn't been closed.
当 pdf 文档完成且尚未关闭时，会发出此警告。
Here is the finalizemethod from COSDocument:
这是finalize来自COSDocument的方法：
/**
* Warn the user in the finalizer if he didn't close the PDF document. The method also
* closes the document just in case, to avoid abandoned temporary files. It's still a good
* idea for the user to close the PDF document at the earliest possible to conserve resources.
* @throws IOException if an error occurs while closing the temporary files
*/
protected void finalize() throws IOException
{
if (!closed) {
if (warnMissingClose) {
log.warn( "Warning: You did not close a PDF Document" );
}
close();
}
}
To get rid of this warning, you should explicitly call closeon the document when you are done with it.
要消除此警告，您应该close在完成后明确调用该文档。
