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:
本地截图:
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:
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>
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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>
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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>
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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" );
}
}
}
}
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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:
单击预览按钮,就会生成预览界面,如下图:
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>
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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。