iText 读取pdf的各级标题和标题对应页码

   因为要做全文检索的项目，需要获取pdf文件的指定标题和标题对应的页码，上网查了相关资料，决定用iText开发包，废话不多说直接上代码。

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
 
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.SimpleBookmark;
 
public class TestPdf {
	
   public static void main ( String [] args ) throws Exception {
     PdfReader reader = new PdfReader ( "e:/test.pdf" ) ;
     List<HashMap<String, Object>> list = SimpleBookmark.getBookmark ( reader ) ;
 
     for ( Iterator<HashMap<String, Object>> i = list.iterator () ; i.hasNext () ; ) {
   
       showBookmark ( i.next ()) ;
      
     }
     for ( Iterator<HashMap<String, Object>> i = list.iterator () ; i.hasNext () ; ) {

    	   getPageNumbers( i.next ());
       }

   }
 //获取标题
   private static void showBookmark ( HashMap<String, Object> bookmark) {
	   System.out.println (bookmark.get ( "Title" )) ;  
     @SuppressWarnings("unchecked")
	ArrayList<HashMap<String, Object>> kids =  (ArrayList<HashMap<String, Object>>) bookmark.get ( "Kids" ) ;
     if ( kids == null )
       return ;
     for ( Iterator<HashMap<String, Object>> i = kids.iterator () ; i.hasNext () ; ) {
    
        showBookmark ( i.next ()) ;
     }
   }
   
  //获取页码
   public static void getPageNumbers(HashMap<String, Object> bookmark) {
       if (bookmark == null)
           return;
       
           if ("GoTo".equals(bookmark.get("Action"))) {

               String page = (String)bookmark.get("Page");
               if (page != null) {

                   page = page.trim();

                   int idx = page.indexOf(' ');

                   int pageNum;

                   if (idx < 0){

                       pageNum = Integer.parseInt(page);
                       System.out.println ("pageNum :"+ pageNum) ;    
                   }
                   else{
            
                       pageNum = Integer.parseInt(page.substring(0, idx));
                       System.out.println ("pageNum:" +pageNum) ;    
                   }
               }
               @SuppressWarnings("unchecked")
			ArrayList<HashMap<String, Object>> kids =  (ArrayList<HashMap<String, Object>>) bookmark.get ( "Kids" ) ;
               if ( kids == null )
                 return ;
               for ( Iterator<HashMap<String, Object>> i = kids.iterator () ; i.hasNext () ; ) {

            	   getPageNumbers ( i.next ()) ;
                }

               }  
       }
  
}