在開發中，經常遇到需要用去解析各類非結構化文本，像doc,xls,pdf,ppt,xml,html.
本人在開發站內搜索時，需要加入對各類文件類型的支持，以方便建立索引。解析各類文檔調用了幾個開源的包。像dom4j-1.6.1.jar，FontBox-0.1.0-dev.jar，htmllexer.jar，htmlparser.jar，PDFBox-0.7.3.jar，poi-3.5-FINAL-20090928.jar，poi-scratchpad-3.5-FINAL-20090928.jar。這些開源的包可以讓我們很方便去解析各類非結構化文本。
jar包的下載地址：
http://www.ziddu.com/download/7017588/devlib.rar.html
代碼如下：
package com.ducklyl;
import java.io.File;
import java.io.FileInputStream;
import java.util.Iterator;
import org.apache.poi.hslf.model.Slide;
import org.apache.poi.hslf.model.TextRun;
import org.apache.poi.hslf.usermodel.SlideShow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.usermodel.Paragraph;
import org.apache.poi.hwpf.usermodel.Range;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.htmlparser.Parser;
import org.htmlparser.filters.*;
import org.htmlparser.*;
import org.htmlparser.nodes.TextNode;
import org.htmlparser.util.*;
import org.pdfbox.pdfparser.PDFParser;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.util.PDFTextStripper;
public class HandleFile {
public static void main(String args[]){
String str="e:\\test.HTML";
System.out.println(handleFile(str));
}
public static String handleFile(String filename){
String result="";
String fileType=filename.substring(filename.lastIndexOf(".")+1, filename.length());
if(fileType.equalsIgnoreCase("pdf"))
result=handlePdf(filename);
else if(fileType.equalsIgnoreCase("xls"))
result=handleExcel(filename);
else if(fileType.equalsIgnoreCase("doc"))
result=handleDoc(filename);
else if(fileType.equalsIgnoreCase("xml"))
result=handleXml(filename);
else if(fileType.equalsIgnoreCase("ppt"))
result=handlePPT(filename);
else if(fileType.equalsIgnoreCase("htm")||fileType.equalsIgnoreCase("html"))
result=handleHtml(filename);
return result;
}
/**
* 解析HTML
* @param filename
* @return
*/
public static String handleHtml(String filename){
String content="";
try{
File file=new File(filename);
if(!file.exists()) return content;
Parser parser=new Parser(filename);
parser.setEncoding("UTF-8");
NodeFilter textFilter=new NodeClassFilter(TextNode.class);
NodeList nodes=parser.extractAllNodesThatMatch(textFilter);
for(int i=0;i<nodes.size();i++){
TextNode textnode=(TextNode)nodes.elementAt(i);
String line=textnode.toPlainTextString().trim();
if(line.equals("")) continue;
content=content+line;
}
}catch(Exception e){
e.printStackTrace();
}
return content;
}
/**
* 解析PPT
* @param filename
* @return
*/
public static String handlePPT(String filename){
StringBuffer content = new StringBuffer("");
try{
File file=new File(filename);
if(!file.exists()) {
return content.toString();
}
FileInputStream instream=new FileInputStream(file);
SlideShow ppt = new SlideShow(instream);
Slide[] slides = ppt.getSlides();
for(int i=0;i<slides.length;i++){
TextRun[] t = slides[i].getTextRuns();//為了取得幻燈片的文字內容，建立TextRun
for(int j=0;j<t.length;j++){
content.append(t[j].getText());//這里會將文字內容加到content中去
}
content.append(slides[i].getTitle());
}
}catch(Exception e){
e.printStackTrace();
}
return content.toString();
}
/**
* 解析XML
* @param filename
* @return
*/
public static String handleXml(String filename){
String content="",value="",text="";
try{
File file=new File(filename);
if(!file.exists()) {
return content;
}
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(file);
Element root = document.getRootElement() ;
Iterator iter=root.elementIterator() ;
while(iter.hasNext()){
Element element=(Element)iter.next();
value=element.getStringValue();
if(!value.trim().equals("")) content=content+value;
}
}catch(Exception e){
e.printStackTrace();
}
return content;
}
/**
* 解析DOC
* @param filename
* @return
*/
public static String handleDoc(String filename){
String content="";
try{
File file=new File(filename);
if(!file.exists()) {
return content;
}
FileInputStream instream=new FileInputStream(file);
HWPFDocument doc=new HWPFDocument(instream);
Range range=doc.getRange();
String text=range.text();
for(int i=0;i<range.numParagraphs();i++){
Paragraph p=range.getParagraph(i);
content=content+p.text().trim()+"\n";
}
}catch(Exception e){
e.printStackTrace();
}
return content;
}
/**
* 解析PDF
* @param filename
* @return
*/
public static String handlePdf(String filename){
String contenttxt="";
try{
File file=new File(filename);
if(!file.exists()){
return contenttxt;
}
FileInputStream instream=new FileInputStream(file);
PDFParser parser=new PDFParser(instream);
parser.parse();
PDDocument pdfdocument=parser.getPDDocument();
PDFTextStripper pdfstripper=new PDFTextStripper();
contenttxt=pdfstripper.getText(pdfdocument);
}catch(Exception e){
e.printStackTrace();
}
return contenttxt;
}
/**
* 解析EXCEL
* @param filename
* @return
*/
public static String handleExcel(String filename){
String content="";
try{
File file=new File(filename);
if(!file.exists()) {
return content;
}
HSSFWorkbook workbook=new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet=workbook.getSheetAt(0);
for(int i=0;i<workbook.getNumberOfSheets();i++){
sheet=workbook.getSheetAt(i);
if(sheet!=null){
for(int m=0;m<sheet.getLastRowNum();m++){
HSSFRow row=sheet.getRow(m);
if(row==null) break;
for(int n=0;n<row.getLastCellNum();n++){
HSSFCell cell=row.getCell(n);
if(cell==null) break;
int type=cell.getCellType();
switch(type){
case 0:
content=content+cell.getNumericCellValue();
break;
case 1:
content=content+cell.getStringCellValue();
break;
case 3:
break;
default:
;
}
}
content=content+"\n";
}
}
content=content+"\n";
}
}catch(Exception e){
e.printStackTrace();
}
return content;
}
}
不想拷貝的朋友可以直接下載源代碼：
http://www.ziddu.com/download/7017614/src.txt.html
以上代碼比較簡單，就不作說明，希望能幫到需要用的朋友。當然上面只是一個簡單的例子，如果要具體應用，大家可以自己再改寫。如果你有其它的想法，歡迎分享你的精彩想法。
轉載請注明出處