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;
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[] {});
}
}
}
2. 用apache的poi來抽取word,excel。
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;
/**
* <p>Title: word extraction</p>
* <p>Description: email:[email protected]</p>
* <p>Copyright: Matrix Copyright (c) 2003</p>
* <p>Company: Matrix.org.cn</p>
* @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);
}
}
3. pdfbox-用來抽取pdf文件
但是pdfbox對中文支持還不好,先下載pdfbox: http://www.pdfbox.org/
下面是一個如何使用pdfbox抽取pdf文件的例子:
import org.pdfbox.pdmodel.PDdocument.
import org.pdfbox.pdfparser.PDFParser;
import java.io.*;
import org.pdfbox.util.PDFTextStripper;
import java.util.Date;
/**
* <p>Title: pdf extraction</p>
* <p>Description: email:[email protected]</p>
* <p>Copyright: Matrix Copyright (c) 2003</p>
* <p>Company: Matrix.org.cn</p>
* @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();
}
}
}