Java实现读取PDF

小咪咪 2022-06-02 11:08 192阅读 0赞

package com.lss.common.pdf;

import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.StringReader;  
import java.io.StringWriter;  
import java.util.List;

import org.apache.log4j.Logger;  
import org.apache.pdfbox.TextToPDF;  
import org.apache.pdfbox.cos.COSDocument;  
import org.apache.pdfbox.pdfparser.PDFParser;  
import org.apache.pdfbox.pdmodel.PDDocument;  
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;  
import org.apache.pdfbox.pdmodel.PDPage;  
import org.apache.pdfbox.pdmodel.common.PDRectangle;  
import org.apache.pdfbox.pdmodel.interactive.form.PDTextbox;  
import org.apache.pdfbox.util.PDFTextStripper;

public class PDFUtils \{  
 private final static Logger logger = Logger.getLogger(PDFUtils.class);

public static void main(String\[\] args) throws IOException \{

TextToPDF pdfCreator = new TextToPDF();  
  StringReader reader = new StringReader("1");  
  PDDocument pdfDoc = pdfCreator.createPDFFromText(reader);  
  reader.close();  
  pdfDoc.close();  
  PDPage page=new PDPage();  
  pdfDoc.addPage(page);

// In order for the PDF document to be openable by Adobe Reader, it  
  // needs  
  // to have some pages in it. So we'll check that.  
  PDDocumentCatalog docCatalog = pdfDoc.getDocumentCatalog();  
  List allPages = docCatalog.getAllPages();  
  System.out.println(allPages.size());  
 \}

/\*\*  
  \* 读取PDF文件  
  \*  
  \* @param path  
  \* @return  
  \* @throws Exception  
  \*/  
 public String readPDFFile(String path) \{  
  try \{  
   StringBuffer content = new StringBuffer();  
   FileInputStream fis = new FileInputStream(path);  
   PDFParser p = new PDFParser(fis);  
   p.parse();  
   PDFTextStripper ts = new PDFTextStripper();  
   content.append(ts.getText(p.getPDDocument()));  
   fis.close();  
   return content.toString();  
  \} catch (Exception ex) \{  
   logger.error(ex);  
  \}  
  return null;  
 \}

public String readPDFFile(File file) throws Exception \{  
  StringBuffer content = new StringBuffer();  
  FileInputStream fis = null;  
  PDDocument pdfDocument = null;  
  StringWriter writer = new StringWriter();  
  PDFTextStripper stripper = new PDFTextStripper();  
  try \{  
   fis = new FileInputStream(file);  
   pdfDocument = PDDocument.load(fis);  
   stripper.writeText(pdfDocument, writer);  
   content.append(writer.getBuffer().toString());  
  \} catch (IOException e) \{  
   logger.error(e);  
  \} finally \{  
   if (writer != null) \{  
    writer.close();  
    writer = null;  
   \}  
   if (fis != null) \{  
    fis.close();  
    file = null;  
   \}  
   if (pdfDocument != null) \{  
    COSDocument cos = pdfDocument.getDocument();  
    cos.close();  
    pdfDocument.close();  
   \}  
  \}  
  return content.toString();  
 \}  
\}