如何在VC ++中打开PDF以提取文本 [英] How to open PDF in VC++ to extract text

问题描述

我需要使用用户提供的密码来转换加密的pdf->文本.

在C ++中

我可以通过使用zlib的VC ++打开(未加密的)pdf.
我正在``rb''模式下打开pdf文件

我是否需要编写自定义函数以使用给定的密码解密流?

[状态:适用于未加密PDF的代码]


在JAVA中

我在Java中找到了使用PDFBox-0.7.3进行PDF到文本提取的代码，但是代码存在一些问题.
PDFBox-0.7.3\src\org\pdfbox\ExtractText.java
处存在空指针异常

Hi,

I need to convert encrypted pdf->text with the password given by the user.

IN C++

I am able to open(unencrypted) pdf by using VC++ using zlib.
I am opening pdf in ''rb'' mode

Do I need to write a custom function to decrypt stream by the given password ?

[STATUS: code working for unencrypted PDF ]


IN JAVA

I have found code in java which do PDF to Text extraction by using PDFBox-0.7.3, but have some issues with the code.
There is a null pointer exception at PDFBox-0.7.3\src\org\pdfbox\ExtractText.java

 AccessPermission ap = document.getCurrentAccessPermission();  

if (!ap.canExtractContent())

http://www.apache.org/dist/pdfbox/1.5. 0/pdfbox-1.5.0-src.zip [ ^ ]


[状态:代码只会创建一个空文件]


我是否以错误的方式提取了pdf?
解密PDF的正确步骤是什么?

http://www.apache.org/dist/pdfbox/1.5.0/pdfbox-1.5.0-src.zip[^]


[STATUS: code just creates empty file ]


Am I doing extraction of the pdf in wrong way ?
What can be the correct steps to decrypt PDF ?

推荐答案

您要么:

(快速路线)

• 使用图书馆(免费或商业).正如已经建议的那样， Google 会帮助您找到它

You either:

(the fast route)

• Use a library (free or commercial). As already suggested, Google would help you finding it

• 研究PDF规范(免费提供)并编写自己的代码来完成这项工作.

• Study the PDF specifications (freely available) and write your own code to do the job.

听起来，您需要一个具有API的SDK，该API允许您打开和提取PDF文件中的文本.我相信您可以通过搜索"PDF SDK"找到很多.

It sounds like what you need is an SDK that has APIs to allow you to open and extract text from a PDF file. I''m sure you will find lots by googling ''PDF SDK''.

这篇关于如何在VC ++中打开PDF以提取文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！