开发笔记:LuceneforJavawithPDFBox获得nullpointer异常

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问题出在这条线上

PDDocument pdfDocument = PDDocument.load（new File（“text.pdf”））;

在那里指定text.pdf的路径，即与路径一起。

在不知道文件驻留位置的情况下，JVM应该如何创建文件对象，这就是Exception发生的原因。在那边给路径，然后你很高兴去。

更新

它似乎是一个bug并已在以后的版本中修复。

为此总是使用为此总是使用pdfbox 1.8.6和fop0.93

PDDocument doc = null; try {doc = new PDDocument（）; PDPage page = new PDPage（）; doc.addPage（页）; PDPageContentStream cOntentStream= new PDPageContentStream（doc，page）;

PDFont pdfFOnt= PDType1Font.HELVETICA;
float fOntSize= 25;
float leading = 1.5f * fontSize;
PDRectangle mediabox = page.findMediaBox();
float margin = 72;
float width = mediabox.getWidth() - 2*margin;
float startX = mediabox.getLowerLeftX() + margin;
float startY = mediabox.getUpperRightY() - margin;
String text = "Hello sir finally PDF is created : thanks";
List lines = new ArrayList();
int lastSpace = -1;
while (text.length() > 0)
{
int spaceIndex = text.indexOf(' ', lastSpace + 1);
if (spaceIndex <0)
{
lines.add(text);
text = "";
}
else
{
String subString = text.substring(0, spaceIndex);
float size = fontSize * pdfFont.getStringWidth(subString) / 1000;
if (size > width)
{
if (lastSpace <0) // So we have a word longer than the line... draw it anyways
lastSpace = spaceIndex;
subString = text.substring(0, lastSpace);
lines.add(subString);
text = text.substring(lastSpace).trim();
lastSpace = -1;
}
else
{
lastSpace = spaceIndex;
}
}
}
contentStream.beginText();
contentStream.setFont(pdfFont, fontSize);
contentStream.moveTextPositionByAmount(startX, startY);
for (String line: lines)
{
contentStream.drawString(line);
contentStream.moveTextPositionByAmount(0, -leading);
}
contentStream.endText();
contentStream.close();
doc.save("E:\document.pdf");
}catch (Exception exp){
logger.error("[GetInformation] email id is " +exp);
}
finally
{
if (doc != null)
{
try{
doc.close();
}catch (Exception expe){
logger.error("[GetInformation] email id is " +expe);
}
}
}


在下面添加外部罐子：

1. PDFBOX-1.3.1


2. 共享记录-1.2

Java代码：

import org.apache.pdfbox.multipdf.Splitter;
import org.apache.pdfbox.pdmodel.PDDocument;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Iterator;
public class PdfSplitting {
public static void main(String[] args)throws IOException {
File file = new File("D:/test.pdf");
PDDocument document = PDDocument.load(file);
Splitter splitter = new Splitter();
ListPages = splitter.split(document);
Iteratoriterator = Pages.listIterator();
int i = 1;
while(iterator.hasNext()) {
PDDocument pd = iterator.next();
pd.save("D:/test"+ i++ +".pdf");
}
System.out.println("Pdf spitted successfully");
document.close();
}
}