java实现word,ppt,excel,jpg转pdf

word，excel，jpeg 转 pdf

首先下载相关jar包：http://download.csdn.net/detail/xu281828044/6922499

 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;

 import com.jacob.activeX.ActiveXComponent;
 import com.jacob.com.Dispatch;
 import com.jacob.com.Variant;
 import com.lowagie.text.Document;
 import com.lowagie.text.DocumentException;
 import com.lowagie.text.Image;
 import com.lowagie.text.PageSize;
 import com.lowagie.text.pdf.PdfWriter;

 public class Word2Pdf {

  static final int wdDoNotSaveChanges = 0;// 不保存待定的更改。
  static final int wdFormatPDF = 17;// word转PDF 格式
  static final int ppSaveAsPDF = 32;// ppt 转PDF 格式

  public static void main(String[] args) throws IOException {
   String source1 = "e:\\test.doc";
   String source2 = "e:\\asd.xlsx";
   String source3 = "e:\\aa.ppt";
   String target1 = "e:\\test1.pdf";
   String target2 = "e:\\test2.pdf";
   String target3 = "e:\\test3.pdf";

   Word2Pdf pdf = new Word2Pdf();
 //  pdf.word2pdf(source1, target1);
 //  pdf.excel2pdf(source2, target2);
 //  pdf.ppt2pdf(source3, target3);
 //  pdf.imgToPdf("e:/12345.jpg","e:/xu.pdf");
  }

  public void word2pdf(String source,String target){
   System.out.println("启动Word");
   long start = System.currentTimeMillis();
   ActiveXComponent app = null;
   try {
    app = new ActiveXComponent("Word.Application");
    app.setProperty("Visible", false);

    Dispatch docs = app.getProperty("Documents").toDispatch();
    System.out.println("打开文档" + source);
    Dispatch doc = Dispatch.call(docs,//
      "Open", //
      source,// FileName
      false,// ConfirmConversions
      true // ReadOnly
      ).toDispatch();

    System.out.println("转换文档到PDF " + target);
    File tofile = new File(target);
    if (tofile.exists()) {
     tofile.delete();
    }
    Dispatch.call(doc,//
      "SaveAs", //
      target, // FileName
      wdFormatPDF);

    Dispatch.call(doc, "Close", false);
    long end = System.currentTimeMillis();
    System.out.println("转换完成..用时：" + (end - start) + "ms.");
   } catch (Exception e) {
    System.out.println("========Error:文档转换失败：" + e.getMessage());
   } finally {
    if (app != null)
     app.invoke("Quit", wdDoNotSaveChanges);
   }
  }

  public void ppt2pdf(String source,String target){
   System.out.println("启动PPT");
   long start = System.currentTimeMillis();
   ActiveXComponent app = null;
   try {
    app = new ActiveXComponent("Powerpoint.Application");
    Dispatch presentations = app.getProperty("Presentations").toDispatch();
    System.out.println("打开文档" + source);
    Dispatch presentation = Dispatch.call(presentations,//
      "Open",
      source,// FileName
      true,// ReadOnly
      true,// Untitled 指定文件是否有标题。
      false // WithWindow 指定文件是否可见。
      ).toDispatch();

    System.out.println("转换文档到PDF " + target);
    File tofile = new File(target);
    if (tofile.exists()) {
     tofile.delete();
    }
    Dispatch.call(presentation,//
      "SaveAs", //
      target, // FileName
      ppSaveAsPDF);

    Dispatch.call(presentation, "Close");
    long end = System.currentTimeMillis();
    System.out.println("转换完成..用时：" + (end - start) + "ms.");
   } catch (Exception e) {
    System.out.println("========Error:文档转换失败：" + e.getMessage());
   } finally {
    if (app != null) app.invoke("Quit");
   }
  }

  public void excel2pdf(String source, String target) {
       System.out.println("启动Excel");
       long start = System.currentTimeMillis();
       ActiveXComponent app = new ActiveXComponent("Excel.Application"); // 启动excel(Excel.Application)
       try {
       app.setProperty("Visible", false);
       Dispatch workbooks = app.getProperty("Workbooks").toDispatch();
       System.out.println("打开文档" + source);
       Dispatch workbook = Dispatch.invoke(workbooks, "Open", Dispatch.Method, new Object[]{source, new Variant(false),new Variant(false)}, new int[3]).toDispatch();
       Dispatch.invoke(workbook, "SaveAs", Dispatch.Method, new Object[] {
       target, new Variant(57), new Variant(false),
       new Variant(57), new Variant(57), new Variant(false),
       new Variant(true), new Variant(57), new Variant(true),
       new Variant(true), new Variant(true) }, new int[1]);
       Variant f = new Variant(false);
       System.out.println("转换文档到PDF " + target);
       Dispatch.call(workbook, "Close", f);
       long end = System.currentTimeMillis();
       System.out.println("转换完成..用时：" + (end - start) + "ms.");
       } catch (Exception e) {
        System.out.println("========Error:文档转换失败：" + e.getMessage());
       }finally {
        if (app != null){
         app.invoke("Quit", new Variant[] {});
        }
       }
  }



  public boolean imgToPdf(String imgFilePath, String pdfFilePath)throws IOException {
      File file=new File(imgFilePath);
      if(file.exists()){
      Document document = new Document();
      FileOutputStream fos = null;
      try {
      fos = new FileOutputStream(pdfFilePath);
      PdfWriter.getInstance(document, fos);

      // 添加PDF文档的某些信息，比如作者，主题等等
      document.addAuthor("arui");
      document.addSubject("test pdf.");
      // 设置文档的大小
      document.setPageSize(PageSize.A4);
      // 打开文档
      document.open();
      // 写入一段文字
      //document.add(new Paragraph("JUST TEST ..."));
      // 读取一个图片
      Image image = Image.getInstance(imgFilePath);
      float imageHeight=image.getScaledHeight();
      float imageWidth=image.getScaledWidth();
      int i=0;
      while(imageHeight>500||imageWidth>500){
      image.scalePercent(100-i);
      i++;
      imageHeight=image.getScaledHeight();
      imageWidth=image.getScaledWidth();
      System.out.println("imageHeight->"+imageHeight);
      System.out.println("imageWidth->"+imageWidth);
      }

      image.setAlignment(Image.ALIGN_CENTER);
 //        //设置图片的绝对位置
      // image.setAbsolutePosition(0, 0);
      // image.scaleAbsolute(500, 400);
      // 插入一个图片
      document.add(image);
      } catch (DocumentException de) {
      System.out.println(de.getMessage());
      } catch (IOException ioe) {
      System.out.println(ioe.getMessage());
      }
      document.close();
      fos.flush();
      fos.close();
      return true;
      }else{
      return false;
      }
      }
 }