很多人用Java進行文檔操作時經常會遇到一個問題，就是如何獲得word，Excel，pdf等文檔的內容？我研究了一下，在這裡總結一下抽取Word,pdf的幾種方法。
1. 用jacob
其實jacob是一個bridage，連接Java和com或者win32函數的一個中間件，jacob並不能直接抽取Word,Excel等文件，需要自己寫dll哦，不過已經有為你寫好的了，就是jacob的作者一並提供了。
jacob jar與dll文件下載： http://danadler.com/jacob/
下載了jacob並放到指定的路徑之後(dll放到path,jar文件放到classpath)，就可以寫你自己的抽取程序了，下面是一個簡單的例子： import Java.io.File; 2. 用apache的poi來抽取Word，Excel。
import com.jacob.com.*;
import com.jacob.activeX.*;
/**
* Title: pdf extraction
* Description: email:[email protected]
* Copyright: Matrix Copyright (c) 2003
* Company: Matrix.org.cn
* @author chris
* @version 1.0,who use this example pls remain the declare
*/
public class FileExtracter{
public static void main(String[] args) {
ActiveXComponent component = new ActiveXComponent("Word.Application");
String inFile = "c:\test.doc";
String tpFile = "c:\temp.htm";
String otFile = "c:\temp.XML";
boolean flag = false;
try {
component.setProperty("Visible", new Variant(false));
Object Wordacc = component.getProperty("document．").toDispatch();
Object wordfile = Dispatch.invoke(Wordacc,"Open", Dispatch.Method,
new Object[]{inFile,new Variant(false), new Variant(true)},
new int[1] ).toDispatch();
Dispatch.invoke(Wordfile,"SaveAs", Dispatch.Method, new Object[]{tpFile,new Variant(8)}, new int[1]);
Variant f = new Variant(false);
Dispatch.call(Wordfile, "Close", f);
flag = true;
} catch (Exception e) {
e.printStackTrace();
} finally {
component.invoke("Quit", new Variant[] {});
}
}
}
poi是apache的一個項目，不過就算用poi你可能都覺得很煩，不過不要緊，這裡提供了更加簡單的一個接口給你：
下載經過封裝後的poi包： http://jakarta.apache.org/poi/
下載之後，放到你的classpath就可以了，下面是如何使用它的一個例子： import Java.io.*;
import org.textmining.text.extraction.WordExtractor;
/**
*
Title: Word extraction
*
Description: email:[email protected]
*
Copyright: Matrix Copyright (c) 2003
*
Company: Matrix.org.cn
* @author chris
* @version 1.0,who use this example pls remain the declare
*/
public class PdfExtractor {
public PdfExtractor() {
}
public static void main(String args[]) throws Exception
{
FileInputStream in = new FileInputStream ("c:\a.doc");
WordExtractor extractor = new WordExtractor();
String str = extractor.extractText(in);
System.out.println("the result length is"+str.length());
System.out.println("the result is"+str);
}
}
import org.pdfbox.pdmodel.PDdocument．
import org.pdfbox.pdfparser.PDFParser;
import Java.io.*;
import org.pdfbox.util.PDFTextStripper;
import Java.util.Date;
/**
*
Title: pdf extraction
*
Description: email:[email protected]
*
Copyright: Matrix Copyright (c) 2003
*
Company: Matrix.org.cn
* @author chris
* @version 1.0,who use this example pls remain the declare
*/
public class PdfExtracter{
public PdfExtracter(){
}
public String GetTextFromPdf(String filename) throws Exception
{
String temp=null;
PDdocument．nbsppdfdocument．null;
FileInputStream is=new FileInputStream(filename);
PDFParser parser = new PDFParser( is );
parser.parse();
pdfdocument．nbsp= parser.getPDdocument．);
ByteArrayOutputStream out = new ByteArrayOutputStream();
OutputStreamWriter writer = new OutputStreamWriter( out );
PDFTextStripper stripper = new PDFTextStripper();
stripper.writeText(pdfdocument．getdocument．), writer );
writer.close();
byte[] contents = out.toByteArray();
String ts=new String(contents);
System.out.println("the string length is"+contents.length+"n");
return ts;
}
public static void main(String args[])
{
PdfExtracter pf=new PdfExtracter();
PDdocument．nbsppdfdocument．nbsp= null;
try{
String ts=pf.GetTextFromPdf("c:\a.pdf");
System.out.println(ts);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
4. 抽取支持中文的pdf文件－xpdf import Java.io.*;
/**
*
Title: pdf extraction
*
Description: email:[email protected]
*
Copyright: Matrix Copyright (c) 2003
*
Company: Matrix.org.cn
* @author chris
* @version 1.0,who use this example pls remain the declare
*/
public class PdfWin {
public PdfWin() {
}
public static void main(String args[]) throws Exception
{
String PATH_TO_XPDF="C:\Program Files\xpdf\pdftotext.exe";
String filename="c:\a.pdf";
String[] cmd = new String[] { PATH_TO_XPDF, "-enc", "UTF-8", "-q", filename, "-"};
Process p = Runtime.getRuntime().exec(cmd);
BufferedInputStream bis = new BufferedInputStream(p.getInputStream());
InputStreamReader reader = new InputStreamReader(bis, "UTF-8");
StringWriter out = new StringWriter();
char [] buf = new char[10000];
int len;
while((len = reader.read(buf))>= 0) {
//out.write(buf, 0, len);
System.out.println("the length is"+len);
}
reader.close();
String ts=new String(buf);
System.out.println("the str is"+ts);
}
}
