PDFTextStripper NullPointerException [英] PDFTextStripper NullPointerException

问题描述

我正在尝试使用 apache PDFBox(1.8.9) 从 Java 中的 PDF 文件中获取一些数据.我已经在我的构建路径和类路径中添加了 jar(在 Eclipse-Mars 中)

I am trying to fetch some data from a PDF file in Java using apache PDFBox(1.8.9). I have added the jar in my buildpath and classpath (in Eclipse-Mars)

我在创建 PDFTextStripper 对象时遇到空指针异常.

I am getting a null pointer exception while creating a PDFTextStripper object.

import java.io.File;
import org.apache.pdfbox.util.PDFTextStripper;
import org.apache.pdfbox.pdmodel.PDDocument;

public class MainClass {

    public static void main(String[] args) {
        PDDocument pd ;

        try{

          StringBuilder sb = new StringBuilder();       

          File input = new File("C:\\Result.pdf");
          pd = PDDocument.load(input);

          PDFTextStripper s = new PDFTextStripper();

        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

}

我得到的错误是:

java.lang.NullPointerException
at org.apache.pdfbox.util.TextNormalize.findICU4J(TextNormalize.java:54)
at org.apache.pdfbox.util.TextNormalize.<init>(TextNormalize.java:45)
at org.apache.pdfbox.util.PDFTextStripper.<init>(PDFTextStripper.java:229)
at MainClass.main(MainClass.java:17)

(第 17 行是我尝试创建 PDFTextStripper 对象的地方)

(Line 17 is where I am trying to create a PDFTextStripper object)

推荐答案

您缺少一些依赖项，请确保您的类路径中存在以下三个 jar:-

You are missing some dependency, please ensure below three jars are present in your classpath:-

我用上述三个 jar 执行了你问题中提到的代码，没有收到任何 NPE.

I executed the code mentioned in your question with the above three jars, didn't receive any NPE.

还请检查您的 pdfbox-1.8.9.jar，确保它没有损坏.
TextStripper 类存在于 pdfbox-1.8.9.jar 中，所以在我看来这个 jar 已损坏.
再次下载 jar 并尝试.

Also kindly check your pdfbox-1.8.9.jar, ensure that its not corrupted.
TextStripper class is present in pdfbox-1.8.9.jar, so It looks to me that this jar is corrupted.
Download the jar again and try.

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