import java.io.IOException;

 import com.itextpdf.awt.geom.Rectangle2D.Float;

 import com.itextpdf.text.pdf.PdfReader;

 import com.itextpdf.text.pdf.parser.ImageRenderInfo;

 import com.itextpdf.text.pdf.parser.PdfReaderContentParser;

 import com.itextpdf.text.pdf.parser.RenderListener;

 import com.itextpdf.text.pdf.parser.TextRenderInfo;

 public class Demo

 {

     // 定义关键字

     private static String KEY_WORD = "KEYWORD";

     // 定义返回值

     private static float[] resu = null;

     // 定义返回页码

     private static int i = 0;

     /*

      * 返回关键字所在的坐标和页数 float[0] >> X float[1] >> Y float[2] >> page

      */

     private float[] getKeyWords(String filePath)

     {

         try

         {

             PdfReader pdfReader = new PdfReader(filePath);

             int pageNum = pdfReader.getNumberOfPages();

             PdfReaderContentParser pdfReaderContentParser = new PdfReaderContentParser(

                     pdfReader);

             // 下标从1开始

             for (i = 1; i < pageNum; i++)

             {

                 pdfReaderContentParser.processContent(i, new RenderListener()

                 {

                     @Override

                     public void renderText(TextRenderInfo textRenderInfo)

                     {

                         String text = textRenderInfo.getText();

                         if (null != text && text.contains(KEY_WORD))

                         {

                             Float boundingRectange = textRenderInfo

                                     .getBaseline().getBoundingRectange();

                             resu = new float[3];

                             resu[0] = boundingRectange.x;

                             resu[1] = boundingRectange.y;

                             resu[2] = i;

                         }

                     }

                     @Override

                     public void renderImage(ImageRenderInfo arg0)

                     {

                         // TODO Auto-generated method stub

                     }

                     @Override

                     public void endTextBlock()

                     {

                         // TODO Auto-generated method stub

                     }

                     @Override

                     public void beginTextBlock()

                     {

                         // TODO Auto-generated method stub

                     }

                 });

             }

         } catch (IOException e)

         {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

         return resu;

     }

 }