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java通过jacob实现office在线预览功能

简介:

这篇文章中的代码都是参考于网上的,只做一个记录。主要做的就是实现一个office在线预览功能。

第一步:装office

第二步:下载jacob

打开网址下载,目前最新的是1.19版本。

第三步:配置jdk

解压下载完的jacob压缩包,根据jdk的版本选择dll中的一个,放入/jdk/jre/bin中。

第四步:在项目中引入jar包

在maven官网上找不到com.jacob的jar包,只能手动引入,这个jar包在jacob的压缩包中有。

<dependency>
  <groupId>com.jacob</groupId>
  <artifactId>jacob</artifactId>
  <version>1.19</version>
  <scope>system</scope>
  <systemPath>${project.basedir}/lib/jacob.jar</systemPath>
</dependency>

第五步:将office转化为pdf文件

这里需要再次说明,这个代码不是我写的,这里只是做个记录,方便下次用到的时候直接使用。

import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletResponse;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.ComThread;
import com.jacob.com.Dispatch;
import com.jacob.com.Variant;
import org.springframework.web.bind.annotation.RestController;
import java.io.*;

@RestController
public class PdfConvert {

 @RequestMapping("/PdfConvert.do")
 public void PdfConvert(HttpServletResponse response) {
  String path = "C:\\Users\\acer\\Desktop\\测试.doc";
  String path2 = "C:\\Users\\acer\\Desktop\\测试.pdf";
  word2PDF(path, path2);
  String path3 = "C:\\Users\\acer\\Desktop\\测试2.ppt";
  String path4 = "C:\\Users\\acer\\Desktop\\测试2.pdf";
  ppt2PDF(path3, path4);
  String path5 = "C:\\Users\\acer\\Desktop\\测试3.xls";
  String path6 = "C:\\Users\\acer\\Desktop\\测试3.pdf";
  excel2PDF(path5, path6);
 }

 public boolean word2PDF(String inputFile, String pdfFile) {
  ActiveXComponent app = new ActiveXComponent("Word.Application");
  try {
   app.setProperty("Visible", false);
   Dispatch docs = app.getProperty("Documents").toDispatch();
   Dispatch doc = Dispatch.call(docs, "Open", new Object[]{inputFile, false, true}).toDispatch();
   Dispatch.call(doc, "ExportAsFixedFormat", new Object[]{pdfFile, 17});
   Dispatch.call(doc, "Close", new Object[]{false});
   app.invoke("Quit", 0);
   return true;
  } catch (Exception var6) {
   app.invoke("Quit", 0);
   return false;
  }
 }

 public boolean excel2PDF(String inputFile, String pdfFile) {
  ComThread.InitSTA(true);
  ActiveXComponent app = new ActiveXComponent("Excel.Application");
  try {
   app.setProperty("Visible", false);
   app.setProperty("AutomationSecurity", new Variant(3));
   Dispatch excels = app.getProperty("Workbooks").toDispatch();
   Dispatch excel = Dispatch.invoke(excels, "Open", 1, new Object[]{inputFile, new Variant(false), new Variant(false)}, new int[9]).toDispatch();
   Dispatch.invoke(excel, "ExportAsFixedFormat", 1, new Object[]{new Variant(0), pdfFile, new Variant(0)}, new int[1]);
   Dispatch.call(excel, "Close", new Object[]{false});
   if (app != null) {
    app.invoke("Quit", new Variant[0]);
    app = null;
   }

   ComThread.Release();
   return true;
  } catch (Exception var6) {
   app.invoke("Quit");
   return false;
  }
 }

 public boolean ppt2PDF(String inputFile, String pdfFile) {
  ActiveXComponent app = new ActiveXComponent("PowerPoint.Application");

  try {
   Dispatch ppts = app.getProperty("Presentations").toDispatch();
   Dispatch ppt = Dispatch.call(ppts, "Open", new Object[]{inputFile, true, true, false}).toDispatch();
   Dispatch.call(ppt, "SaveAs", new Object[]{pdfFile, 32});
   Dispatch.call(ppt, "Close");
   app.invoke("Quit");
   return true;
  } catch (Exception var6) {
   app.invoke("Quit");
   return false;
  }
 }
}

第六步:在页面上展示pdf

后端:

@RequestMapping("/GetPdf.do")
 public void GetPdf(HttpServletResponse response) {
  //从数据库中查出文件位置和文件名字
  String pdfpath = "C:\\Users\\acer\\Desktop\\测试.pdf";
  String pdfname = "测试";
  try {
   File file = new File(pdfpath);
   if (!file.exists()) {
    response.getWriter().write("该文档生成pdf失败,请下载文档查看");
    return;
   }
   InputStream fis = new FileInputStream(pdfpath);
   byte[] buffer = new byte[1024];
   response.reset();
   response.addHeader("Content-Disposition", "inline;filename=" + java.net.URLEncoder.encode(pdfname, "UTF-8"));
   response.addHeader("Content-Length", "" + file.length());
   response.setContentType("application/pdf");
   OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
   int nbytes = 0;
   while ((nbytes = fis.read(buffer)) != -1) {
    toClient.write(buffer, 0, nbytes);
    toClient.flush();
   }
   toClient.flush();
   toClient.close();
   fis.close();
  } catch (Exception ex) {
   ex.printStackTrace();
  }
 }

前端:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8"/>
 <title>pdf在线预览</title>
</head>
<body>
<div style=" width: 100%; height: 100%;">
 <embed src="/GetPdf.do"
   type="application/pdf" style="overflow: auto; width: 100%; height: 800px;" />
</div>
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持谷谷点程序。

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