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java实现附件预览(openoffice+swftools+flexpaper)实例

2020-06-28 11:40魔流剑 JAVA教程

本篇文章主要介绍了java实现附件预览(openoffice+swftools+flexpaper)实例,具有一定的参考价值,感兴趣的小伙伴们可以参考一下。

本文主要介绍了java实现附件预览,需要用到openoffice、SWFTools、FlexPaper,具体步骤如下:

1.概述

主要原理

1.通过第三方工具openoffice,将word、excel、ppt、txt等文件转换为pdf文件

2.通过swfTools将pdf文件转换成swf格式的文件

3.通过FlexPaper文档组件在页面上进行展示

2.安装包下载

1.openoffice是Apache下的一个开放免费的文字处理软件

   下载地址:Apache oppenoffice 官网下载 版本-3.4.1 http://www.openoffice.org/zh-cn/download/

2.SWFTools是一组用来处理Flash的swf文件的工具包,我们使用它将pdf文件转成swf文件!

   下载地址:SWFTools官网下载 swftools-2013-04-09-1007.exe  http://www.swftools.org/download.html

3.FlexPaper是一个开源轻量级的在浏览器上显示各种文档的组件

   下载地址:FlexPaper官网下载 版本1.5.1  https://flowpaper.com/download/

4.JODConverter一个Java的OpenDocument 文件转换器,在此我们只用到它的jar包

   下载地址:JODCConverter下载  https://sourceforge.net/projects/jodconverter/files/

3.安装文件

1.将所下载的文件(JODConverter除外)进行安装,盘符可随自己设定!需要注意的是在openoffice安装完成后,当我们使用它时,需将它的服务打开。在次我们需要以命令的方式打开:

打开dos窗口,进入openoffice安装盘符,输入以下代码来启动服务:

soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard

注意最后一个命令前边的‘—',可不要写错!服务起不来,项目可是继续不下去的哦.

官网启动服务截图如下:

java实现附件预览(openoffice+swftools+flexpaper)实例

本地截图:

java实现附件预览(openoffice+swftools+flexpaper)实例

3.开发过程

1.新建项目,将flexpaper文件中的js文件夹(包含了flexpaper_flash_debug.js,flexpaper_flash.js,jquery.js,这三个js文件主要是预览swf文件的插件)拷贝至网站根目录;将FlexPaperViewer.swf拷贝至网站根目录下(该文件主要是用在网页中播放swf文件的播放器),目录结构如下图:

java实现附件预览(openoffice+swftools+flexpaper)实例

注:需创建upload文件夹

2.创建fileUpload.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>文档在线预览系统</title>
<style>
  body {margin-top:100px;background:#fff;font-family: Verdana, Tahoma;}
  a {color:#CE4614;}
  #msg-box {color: #CE4614; font-size:0.9em;text-align:center;}
  #msg-box .logo {border-bottom:5px solid #ECE5D9;margin-bottom:20px;padding-bottom:10px;}
  #msg-box .title {font-size:1.4em;font-weight:bold;margin:0 0 30px 0;}
  #msg-box .nav {margin-top:20px;}
</style>
 
</head>
<body>
<div id="msg-box">
  <form name="form1" method="post" enctype="multipart/form-data" action="docUploadConvertAction.jsp">
    <div class="title">
      请上传要处理的文件,过程可能需要几分钟,请稍候片刻。
    </div>
    <p>
      <input name="file1" type="file">
    </p>
    <p>
      <input type="submit" name="Submit" value="上传">
    </p>
  </form >
</div>
</body>
</html>

3.创建转换页docUploadConvertAction.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 
<%@page import="java.io.*"%>
<%@page import="java.util.Enumeration"%>
<%@page import="com.oreilly.servlet.MultipartRequest"%>
<%@page import="com.oreilly.servlet.multipart.DefaultFileRenamePolicy"%>
<%@page import="com.cectsims.util.DocConverter"%>
<%
//文件上传采用cos组件上传,可更换为commons-fileupload上传,文件上传后,保存在upload文件夹
//获取文件上传路径
String saveDirectory =application.getRealPath("/")+"upload";
//打印上传路径信息
System.out.println(saveDirectory);
//每个文件最大50m
int maxPostSize = 50 * 1024 * 1024 ;
//采用cos缺省的命名策略,重名后加1,2,3...如果不加dfp重名将覆盖
DefaultFileRenamePolicy dfp = new DefaultFileRenamePolicy();
//response的编码为"UTF-8",同时采用缺省的文件名冲突解决策略,实现上传,如果不加dfp重名将覆盖
MultipartRequest multi = new MultipartRequest(request, saveDirectory, maxPostSize,"UTF-8",dfp);
//MultipartRequest multi = new MultipartRequest(request, saveDirectory, maxPostSize,"UTF-8");
//输出反馈信息
 Enumeration files = multi.getFileNames();
   while (files.hasMoreElements()) {
    System.err.println("ccc");
    String name = (String)files.nextElement();
    File f = multi.getFile(name);
    if(f!=null){
     String fileName = multi.getFilesystemName(name);
     //获取上传文件的扩展名
     String extName=fileName.substring(fileName.lastIndexOf(".")+1);
     //文件全路径
     String lastFileName= saveDirectory+"\\" + fileName;
     //获取需要转换的文件名,将路径名中的'\'替换为'/'
     String converfilename = saveDirectory.replaceAll("\\\\", "/")+"/"+fileName;
     System.out.println(converfilename);
     //调用转换类DocConverter,并将需要转换的文件传递给该类的构造方法
     DocConverter d = new DocConverter(converfilename);
     //调用conver方法开始转换,先执行doc2pdf()将office文件转换为pdf;再执行pdf2swf()将pdf转换为swf;
     d.conver();
     //调用getswfPath()方法,打印转换后的swf文件路径
     System.out.println(d.getswfPath());
     //生成swf相对路径,以便传递给flexpaper播放器
     String swfpath = "upload"+d.getswfPath().substring(d.getswfPath().lastIndexOf("/"));
     System.out.println(swfpath);
     //将相对路径放入sessio中保存
     session.setAttribute("swfpath", swfpath);
     out.println("上传的文件:"+lastFileName);
     out.println("文件类型"+extName);
     out.println("<hr>");
    }
   }
 
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style>
  body {margin-top:100px;background:#fff;font-family: Verdana, Tahoma;}
  a {color:#CE4614;}
  #msg-box {color: #CE4614; font-size:0.9em;text-align:center;}
  #msg-box .logo {border-bottom:5px solid #ECE5D9;margin-bottom:20px;padding-bottom:10px;}
  #msg-box .title {font-size:1.4em;font-weight:bold;margin:0 0 30px 0;}
  #msg-box .nav {margin-top:20px;}
</style>
</head>
<body>
  <div>
    <form name="viewForm" id="form_swf" action="documentView.jsp" method="POST">
      <input type='submit' value='预览' class='BUTTON SUBMIT'/>
    </form>
  </div>
</body>
</html>

创建查看页documentView.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%
  String swfFilePath=session.getAttribute("swfpath").toString();
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/flexpaper_flash.js"></script>
<script type="text/javascript" src="js/flexpaper_flash_debug.js"></script>
<style type="text/css" media="screen"
      html, body { height:100%; }
      body { margin:0; padding:0; overflow:auto; }  
      #flashContent { display:none; }
    </style> 
 
<title>文档在线预览系统</title>
</head>
<body> 
    <div style="position:absolute;left:50px;top:10px;">
      <a id="viewerPlaceHolder" style="width:820px;height:650px;display:block"></a>
       
      <script type="text/javascript"
        var fp = new FlexPaperViewer(  
             'FlexPaperViewer',
             'viewerPlaceHolder', { config : {
             SwfFile : escape('<%=swfFilePath%>'),
             Scale : 0.6, 
             ZoomTransition : 'easeOut',
             ZoomTime : 0.5,
             ZoomInterval : 0.2,
             FitPageOnLoad : true,
             FitWidthOnLoad : false,
             FullScreenAsMaxWindow : false,
             ProgressiveLoading : false,
             MinZoomSize : 0.2,
             MaxZoomSize : 5,
             SearchMatchAll : false,
             InitViewMode : 'SinglePage',
              
             ViewModeToolsVisible : true,
             ZoomToolsVisible : true,
             NavToolsVisible : true,
             CursorToolsVisible : true,
             SearchToolsVisible : true,
             
             localeChain: 'en_US'
             }});
      </script>      
    </div>
</body>
</html>

5.创建转换类DocConverter.java

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package com.cectsims.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
 
import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;
 
/**
 * doc docx格式转换
 */
public class DocConverter {
  private static final int environment = 1;// 环境 1:windows 2:linux
  private String fileString;// (只涉及pdf2swf路径问题)
  private String outputPath = "";// 输入路径 ,如果不设置就输出在默认的位置
  private String fileName;
  private File pdfFile;
  private File swfFile;
  private File docFile;
   
  public DocConverter(String fileString) {
    ini(fileString);
  }
 
  /**
   * 重新设置file
   *
   * @param fileString
   */
  public void setFile(String fileString) {
    ini(fileString);
  }
 
  /**
   * 初始化
   *
   * @param fileString
   */
  private void ini(String fileString) {
    this.fileString = fileString;
    fileName = fileString.substring(0, fileString.lastIndexOf("."));
    docFile = new File(fileString);
    pdfFile = new File(fileName + ".pdf");
    swfFile = new File(fileName + ".swf");
  }
   
  /**
   * 转为PDF
   *
   * @param file
   */
  private void doc2pdf() throws Exception {
    if (docFile.exists()) {
      if (!pdfFile.exists()) {
        OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100);
        try {
          connection.connect();
          DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
          converter.convert(docFile, pdfFile);
          // close the connection
          connection.disconnect();
          System.out.println("****pdf转换成功,PDF输出:" + pdfFile.getPath()+ "****");
        } catch (java.net.ConnectException e) {
          e.printStackTrace();
          System.out.println("****swf转换器异常,openoffice服务未启动!****");
          throw e;
        } catch (com.artofsolving.jodconverter.openoffice.connection.OpenOfficeException e) {
          e.printStackTrace();
          System.out.println("****swf转换器异常,读取转换文件失败****");
          throw e;
        } catch (Exception e) {
          e.printStackTrace();
          throw e;
        }
      } else {
        System.out.println("****已经转换为pdf,不需要再进行转化****");
      }
    } else {
      System.out.println("****swf转换器异常,需要转换的文档不存在,无法转换****");
    }
  }
   
  /**
   * 转换成 swf
   */
  @SuppressWarnings("unused")
  private void pdf2swf() throws Exception {
    Runtime r = Runtime.getRuntime();
    if (!swfFile.exists()) {
      if (pdfFile.exists()) {
        if (environment == 1) {// windows环境处理
          try {
            Process p = r.exec("D:/Program Files/SWFTools/pdf2swf.exe "+ pdfFile.getPath() + " -o "+ swfFile.getPath() + " -T 9");
            System.out.print(loadStream(p.getInputStream()));
            System.err.print(loadStream(p.getErrorStream()));
            System.out.print(loadStream(p.getInputStream()));
            System.err.println("****swf转换成功,文件输出:"
                + swfFile.getPath() + "****");
            if (pdfFile.exists()) {
              pdfFile.delete();
            }
 
          } catch (IOException e) {
            e.printStackTrace();
            throw e;
          }
        } else if (environment == 2) {// linux环境处理
          try {
            Process p = r.exec("pdf2swf " + pdfFile.getPath()
                + " -o " + swfFile.getPath() + " -T 9");
            System.out.print(loadStream(p.getInputStream()));
            System.err.print(loadStream(p.getErrorStream()));
            System.err.println("****swf转换成功,文件输出:"
                + swfFile.getPath() + "****");
            if (pdfFile.exists()) {
              pdfFile.delete();
            }
          } catch (Exception e) {
            e.printStackTrace();
            throw e;
          }
        }
      } else {
        System.out.println("****pdf不存在,无法转换****");
      }
    } else {
      System.out.println("****swf已经存在不需要转换****");
    }
  }
 
  static String loadStream(InputStream in) throws IOException {
 
    int ptr = 0;
    in = new BufferedInputStream(in);
    StringBuffer buffer = new StringBuffer();
 
    while ((ptr = in.read()) != -1) {
      buffer.append((char) ptr);
    }
 
    return buffer.toString();
  }
  /**
   * 转换主方法
   */
  @SuppressWarnings("unused")
  public boolean conver() {
 
    if (swfFile.exists()) {
      System.out.println("****swf转换器开始工作,该文件已经转换为swf****");
      return true;
    }
 
    if (environment == 1) {
      System.out.println("****swf转换器开始工作,当前设置运行环境windows****");
    } else {
      System.out.println("****swf转换器开始工作,当前设置运行环境linux****");
    }
    try {
      doc2pdf();
      pdf2swf();
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
 
    if (swfFile.exists()) {
      return true;
    } else {
      return false;
    }
  }
 
  /**
   * 返回文件路径
   *
   * @param s
   */
  public String getswfPath() {
    if (swfFile.exists()) {
      String tempString = swfFile.getPath();
      tempString = tempString.replaceAll("\\\\", "/");
      return tempString;
    } else {
      return "";
    }
 
  }
  /**
   * 设置输出路径
   */
  public void setOutputPath(String outputPath) {
    this.outputPath = outputPath;
    if (!outputPath.equals("")) {
      String realName = fileName.substring(fileName.lastIndexOf("/"),
          fileName.lastIndexOf("."));
      if (outputPath.charAt(outputPath.length()) == '/') {
        swfFile = new File(outputPath + realName + ".swf");
      } else {
        swfFile = new File(outputPath + realName + ".swf");
      }
    }
  }
 
}

6.部署发布

启动tomcat,部署当前web应用

地址栏输入http://localhost:8080/ctcesims/documentUpload.jsp 如下图:

java实现附件预览(openoffice+swftools+flexpaper)实例

单击预览按钮,就会生成预览界面,如下图:

java实现附件预览(openoffice+swftools+flexpaper)实例

4.常见问题

若出现swf无法预览,请访问

http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager04a.html#119065

将生成swf的文件夹设置为信任文件位置。
以下给出 flexpaper 2.1.9 的不同之处:初始化方式改变,若文件目录与项目目录不在一起,可将附件目录在服务器中设置为虚拟目录

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<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%
  //String swfFilePath=session.getAttribute("swfpath").toString();
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/flexpaper.js"></script>
<script type="text/javascript" src="js/flexpaper_handlers.js"></script>
<style type="text/css" media="screen">
      html, body  { height:100%; }
      body { margin:0; padding:0; overflow:auto; } 
      #flashContent { display:none; }
    </style>
 
<title>文档在线预览系统</title>
</head>
<body>
    <div style="position:absolute;left:50px;top:10px;">
      <div id="documentViewer" class="flexpaper_viewer" style="width:770px;height:500px"></div>
 
      <script type="text/javascript">
 
      var startDocument = "Paper";
 
      $('#documentViewer').FlexPaperViewer(
          { config : {
 
            SWFFile : 'upload/ddd3.swf',
 
            Scale : 0.6,
            ZoomTransition : 'easeOut',
            ZoomTime : 0.5,
            ZoomInterval : 0.2,
            FitPageOnLoad : true,
            FitWidthOnLoad : false,
            FullScreenAsMaxWindow : false,
            ProgressiveLoading : false,
            MinZoomSize : 0.2,
            MaxZoomSize : 5,
            SearchMatchAll : false,
            InitViewMode : 'Portrait',
            RenderingOrder : 'flash',
            StartAtPage : '',
 
            ViewModeToolsVisible : true,
            ZoomToolsVisible : true,
            NavToolsVisible : true,
            CursorToolsVisible : true,
            SearchToolsVisible : true,
            WMode : 'window',
            localeChain: 'en_US'
          }}
      );
    
      </script>     
    </div>
</body>
</html>

最后,若需要去除打印功能及logo,可重新编译 flexpaper 的 flash文件,网上也有下载

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服务器之家。

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