Java模拟实现百度文档在线浏览 学习Java模拟实现百度文档在线浏览

package com.baidu.util;
 
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ConnectException;
 
import javax.imageio.stream.FileImageInputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
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;
 
/**
 * @Author:NuoYan
 * @Date:2015-2-2 下午2:24:58 
 * TODO: 1、第一步，首先获取到需要查看的文件
 *    2、第二部，将获取的文件(doc,xls,txt,ppt,03/07版本转化为PDF),这一步需要调用OpenOffice
 *    3、第三部，将资源文件转换好的PDF文件转换为swf文件,使用FlexPaperViewer.swf进行浏览查看
 */
public class BaiDuServlet extends HttpServlet {
  private File sourceFile;// 要转化的源文件
  private File pdfFile;// pdf中间文件对象
  private File swfFile;// swf目标文件对象
  private String filePath;// 用来保存文件路径
  private String fileName;// 不包括后缀名的文件名
 
  public File getSourceFile() {
    return sourceFile;
  }
 
  public void setSourceFile(File sourceFile) {
    this.sourceFile = sourceFile;
  }
 
  public File getPdfFile() {
    return pdfFile;
  }
 
  public void setPdfFile(File pdfFile) {
    this.pdfFile = pdfFile;
  }
 
  public File getSwfFile() {
    return swfFile;
  }
 
  public void setSwfFile(File swfFile) {
    this.swfFile = swfFile;
  }
 
  public String getFilePath() {
    return filePath;
  }
 
  public void setFilePath(String filePath) {
    this.filePath = filePath;
  }
 
  public String getFileName() {
    return fileName;
  }
 
  public void setFileName(String fileName) {
    this.fileName = fileName;
  }
 
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    String saveFileName = request.getParameter("savFile");
    System.out.println(saveFileName);
    String webPath = request.getRealPath("/");
    filePath = webPath + "reader\\" + saveFileName;
    fileName = filePath.substring(0, filePath.lastIndexOf("."));
    // 创建三个文件对象
    sourceFile = new File(filePath);
    pdfFile = new File(fileName + ".pdf");
    swfFile = new File(fileName + ".swf");
    System.out.println(pdfFile);
    System.out.println(swfFile);
    // 1、将源文件转化为pdf格式文件
    src2pdf();
    try {
      // 2、将pdf文件转化为swf文件
      pdf2swf();
    } catch (Exception e) {
      e.printStackTrace();
    }
    // 将转化好的文件绑定到session上去
    request.getSession().setAttribute("swfName", swfFile.getName());
    System.out.println(swfFile.getName());
    // 重定向到预览页面
    response.sendRedirect(request.getContextPath() + "/reader/baseFile.jsp");
  }
 
  /**
   * @Author:NuoYan
   * @Date:2015-2-2 下午2:28:22 TODO://源文件转化为PDF文件
   */
  private void src2pdf() {
    if (sourceFile.exists()) {
      // 如果不存在，需要转份为PDF文件
      if (!pdfFile.exists()) {
        // 启用OpenOffice提供的转化服务
        OpenOfficeConnection conn = new SocketOpenOfficeConnection(8100);
        // 连接OpenOffice服务器
        try {
          conn.connect();
          // 建立文件转换器对象
          DocumentConverter converter = new OpenOfficeDocumentConverter(
              conn);
          converter.convert(sourceFile, pdfFile);
          // 断开链接
          conn.disconnect();
          System.out.println("转换成功");
        } catch (ConnectException e) {
          e.printStackTrace();
        }
      } else {
        System.out.println("已经存在PDF文件，不需要在转换！！");
      }
    } else {
      System.out.println("文件路径不存在！！！");
    }
 
  }
 
  /**
   * @Author:NuoYan
   * @Date:2015-2-2 下午2:28:32
   * @throws Exception
   * TODO:PDF转化为SWF文件
   */
  private void pdf2swf() throws Exception {
    if (!swfFile.exists()) {
      if (pdfFile.exists()) {
        String command = "C:\\Pdf2swf\\pdf2swf.exe "
            + pdfFile.getPath() + " -o " + swfFile.getPath()
            + " -T 9";
        System.out.println("转换命令:" + command);
        // Java调用外部命令,执行pdf转化为swf
        Runtime r = Runtime.getRuntime();
        Process p = r.exec(command);
        System.out.println(loadStream(p.getInputStream()));
        System.out.println("swf文件转份成功！！！");
        System.out.println(swfFile.getPath());
      } else {
        System.out.println("不存在PDF文件");
      }
    }
 
  }
   
  private static String loadStream(InputStream in) throws Exception {
    int len = 0;
    in = new BufferedInputStream(in);
    StringBuffer buffer = new StringBuffer();
    while ((len = in.read()) != -1) {
      buffer.append((char) len);
    }
    return buffer.toString();
  }
 
}

<%@ page language="java" import="java.util.*"pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <title>百度文库在线预览</title>
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0">  
  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  <meta http-equiv="description" content="This is my page">
 </head>
 <body>
  <a href="<%=request.getContextPath()%>/BaiDuServlet?savFile=1234.xls">在线预览</a>
 </body>
</html>

<%@ 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>在线阅读</title>
<script type="text/javascript" src="../FlexPaper/js/flexpaper_flash.js"></script>
<style type="text/css">
html,body{height: 100%;}
body {
  margin: 0;padding: 0;overflow: auto;
}
#flashContent { display:none; }
</style>
</head>
<body>
<div style="position:absolute;left:10px;top:10px;">
      <a id="viewerPlaceHolder" style="width:1000px;height:480px;display:block"></a>
      <script type="text/javascript"> 
        var fp = new FlexPaperViewer( 
             '../FlexPaper/FlexPaperViewer',
             'viewerPlaceHolder', { config : {
             SwfFile : escape('../reader/<%=(String)session.getAttribute("swfName")%>'),
             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',
             PrintPaperAsBitmap : false,
             
             ViewModeToolsVisible : true,
             ZoomToolsVisible : true,
             NavToolsVisible : true,
             CursorToolsVisible : true,
             SearchToolsVisible : true,
              
              localeChain: 'zh_CN'
             }});
      </script>
    </div>
 
</body>
</html>