利用openoffice+jodconverter-code-3.0-bate4实现ppt转图片

本文实例为大家分享了openoffice+jodconverter-code-3.0-bate4实现ppt转图片的具体代码，供大家参考，具体内容如下

安装openoffice4  （用于把文档(ppt)转成pdf）根据系统的位数安装
使用jodconverter-core3.0-beta-4（要上传maven本地仓库）
安装ImageMagick：yum install ImageMagick（用于pdf转图片）
安装pdftotext  用于提取文字大纲  yum install poppler-utils
perl脚本（用于提取pdf文档的文字大纲）

使用jodconverter调用OpenOffice 将office文档转换为PDF时。如果转换程序异常中止而OpenOffice并没有停止运行的话。

openoffice

1、启动tomcat时，启动openoffice服务（个人感觉有风险问题）

2、手工用命令，启动openoffice服务，在使用链接服务（推荐）

package com.document.servers.impl;

import java.io.File;
import java.net.ConnectException;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.artofsolving.jodconverter.OfficeDocumentConverter;
import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.ExternalOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeConnectionProtocol;
import org.artofsolving.jodconverter.office.OfficeManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

//import com.artofsolving.jodconverter.DefaultDocumentFormatRegistry;
//import com.artofsolving.jodconverter.DocumentConverter;
//import com.artofsolving.jodconverter.DocumentFamily;
//import com.artofsolving.jodconverter.DocumentFormat;
//import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
//import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
//import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;
import com.document.servers.OfficeService;

/**
* linux下：
* cd /opt/openoffice4/program
* ./soffice "-accept=socket,host=localhost,port=8100;urp;StarOffice.ServiceManager" -nologo -headless -nofirststartwizard &
*/
@Service("officeService")
public class OfficeServiceImpl implements OfficeService {

private static final Logger logger = LoggerFactory.getLogger(OfficeServiceImpl.class);

private OfficeManager officeManager;
 private OfficeDocumentConverter documentConverter;

//  @PostConstruct
//  public void init() throws Exception {
//    // TODO Auto-generated method stub
//    officeManager = new DefaultOfficeManagerConfiguration().setOfficeHome("/opt/openoffice4").buildOfficeManager();
//
//    documentConverter = new OfficeDocumentConverter(officeManager);
//    // officeManager.stop();
//
//    logger.warn("openoffice starting....");
//    try {
//      officeManager.start();
//      logger.warn("openoffice started");
//    } catch (Exception e) {
//      logger.error("office start failed:{}", e);
//    }
//  }
//
//  @PreDestroy
//  public void destroy() throws Exception {
//    // TODO Auto-generated method stub
//    logger.info("shutdown office service....");
//    if (officeManager != null) {
//      try {
//        
//        officeManager.stop();
//        logger.info("office closed");
//      } catch (Exception e) {
//        logger.error("office close failed:{}", e);
//      }
//    }
//  }

//  public void convert(String inputfilename, String outputfilename) {
//    logger.info("convert...." + inputfilename + " to " + outputfilename);
//    documentConverter.convert(new File(inputfilename), new File(outputfilename));
//  }

public void manualConvert(String inputfilename, String outputfilename) {
   logger.info("convert...." + inputfilename + " to " + outputfilename);
   // connect to an OpenOffice.org instance running on port 8100
   ExternalOfficeManagerConfiguration externalProcessOfficeManager = new
       ExternalOfficeManagerConfiguration();
   externalProcessOfficeManager.setConnectOnStart(true);
   externalProcessOfficeManager.setPortNumber(8100);
   officeManager = externalProcessOfficeManager.buildOfficeManager();
   officeManager.start();
   logger.info("openoffice服务已链接");
   documentConverter = new OfficeDocumentConverter(officeManager);
   documentConverter.convert(new File(inputfilename), new File(outputfilename));
 }

}

转换处理方法

package com.document.servers.impl;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.document.defined.model.ImagePPT;
import com.document.servers.OfficeService;
import com.document.servers.PPTConvertServers;
import com.document.tool.ImageMagickUtils;
import com.document.tool.SystemConfig;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ppt.util.Command;

@Service("pPTConvertServers")
public class PPTConvertServersImpl implements PPTConvertServers {

private static final Logger logger = LoggerFactory.getLogger(PPTConvertServersImpl.class);

@Autowired
 private OfficeService officeService;

/**
  * (non-Javadoc)
  * 利用openoffice把ppt转图片
  */
 public Map<String, Object> deal_ppt(HttpServletRequest request, String filePath, String extension, String title, String filename)
     throws Exception {

logger.info("ppt转pdf,{}");

// ppt文件地址
   String ppt_target_file = filePath;

// pdf文件地址
   String path = filePath.substring(0, filePath.lastIndexOf("."));
   String pdf_target_file = path + ".pdf";
   // 输出jpg文件地址
   String images_target_file = path + "/jpg" + "-％d.jpg";

// if(exists(pdf_target_file)){
   // unlink(pdf_target_file);//删除
   // }
   // copy(new File(ppt_target_file), ppt_target_file, true);

if (!extension.equals(".pdf")) {
     officeService.manualConvert(ppt_target_file, pdf_target_file);// 转成pdf文件
   }

StringWriter writer = new StringWriter();

// 提取文字大纲
   String[] pdf_lines = extractOutLineFromPDF(pdf_target_file);

File filepath = new File(images_target_file);
   File parentFile = filepath.getParentFile();
   if (!parentFile.exists()) {
     logger.info("创建图片目录");
     parentFile.mkdirs();
   }

Command.run("convert " + pdf_target_file + " " + images_target_file, writer);// 转成图片

String basePath = request.getScheme() + "://" + request.getServerName() + "/";
   PDDocument document = PDDocument.load(new File(pdf_target_file));
   int pageCount = document.getNumberOfPages();
   document.close();

List<ImagePPT> list = new ArrayList<ImagePPT>();
   String pathUrl = filename.substring(0, filename.lastIndexOf("."));
   if (pageCount > 0) {
     for (int i = 0; i < pageCount; i++) {
       ImagePPT imagePPT = new ImagePPT();
       imagePPT.setId(i + 1);
       if (pdf_lines.length > 0) {
         try {
           imagePPT.setTitle(pdf_lines[i]);
         } catch (Exception e) {
           // TODO Auto-generated catch block
           imagePPT.setTitle(title);
           logger.info("title,数组越界");
           //e.printStackTrace();
         }
       } else {
         imagePPT.setTitle(title);
       }
       imagePPT.setUrl(basePath + "images/" + pathUrl + "/jpg-" + i + ".jpg");
       imagePPT.setPreviewUrl(basePath + "preview/images/" + pathUrl + "/preview/pjpg-" + i + ".jpg");

//        String oimgDir = SystemConfig.getBlobDirectory() + pathUrl + "/jpg-" + i + ".jpg";
//        String pimgDir = SystemConfig.getBlobDirectory() + pathUrl + "/preview/pjpg-" + i + ".jpg";
//        File pfilepath = new File(pimgDir);
//        File pf = pfilepath.getParentFile();
//        if (!pf.exists()) {
//          pf.mkdirs();
//        }
       //ImageMagickUtils.scale(oimgDir, pimgDir, 240, 180);//预览图
       list.add(imagePPT);
     }
   }
   // 拼接json字符串

ObjectMapper objectMapper = new ObjectMapper();
   String jsonlist = objectMapper.writeValueAsString(list);
   // logger.info(jsonlist);
   Map<String, Object> map=new HashMap<String, Object>();
   map.put("json", jsonlist.toString());
   map.put("totalPage", pageCount);
   return map;

}

/**
  * 文件已经上传过 ，进行替换性转换
  */
 public Map<String, Object> replace_ppt(HttpServletRequest request, String filePath, String extension, String title,
     String filename) throws Exception {

logger.info("替换，ppt转pdf,{}");

// ppt文件地址
   String ppt_target_file = filePath;

// pdf文件地址
   String path = filePath.substring(0, filePath.lastIndexOf("."));
   String pdf_target_file = path + ".pdf";
   // 输出jpg文件地址
   String images_target_file = path + "/jpg" + "-％d.jpg";

if (!extension.equals(".pdf")) {
     officeService.manualConvert(ppt_target_file, pdf_target_file);// 转成pdf文件
   }

StringWriter writer = new StringWriter();

// 提取文字大纲
   String[] pdf_lines = extractOutLineFromPDF(pdf_target_file);

File filepath = new File(images_target_file);
   File parentFile = filepath.getParentFile();
   if (!parentFile.exists()) {
     logger.info("替换创建图片目录");
     parentFile.mkdirs();
   }
   Command.run("convert " + pdf_target_file + " " + images_target_file, writer);// 转成图片

String basePath = request.getScheme() + "://" + request.getServerName() + "/";
   PDDocument document = PDDocument.load(new File(pdf_target_file));
   int pageCount = document.getNumberOfPages();
   document.close();

List<ImagePPT> list = new ArrayList<ImagePPT>();
   String pathUrl = filename.substring(0, filename.lastIndexOf("."));
   if (pageCount > 0) {
     for (int i = 0; i < pageCount; i++) {
       ImagePPT imagePPT = new ImagePPT();
       imagePPT.setId(i + 1);
       if (pdf_lines.length > 0) {
         try {
           imagePPT.setTitle(pdf_lines[i]);
         } catch (Exception e) {
           // TODO Auto-generated catch block
           imagePPT.setTitle(title);
           logger.info("title,数组越界");
           // e.printStackTrace();
         }
       } else {
         imagePPT.setTitle(title);
       }
       imagePPT.setUrl(basePath + "images/" + pathUrl + "/jpg-" + i + ".jpg");
       imagePPT.setPreviewUrl(basePath + "preview/images/" + pathUrl + "/preview/pjpg-" + i + ".jpg");

//        String oimgDir = SystemConfig.getBlobDirectory() + pathUrl + "/jpg-" + i + ".jpg";
//        String pimgDir = SystemConfig.getBlobDirectory() + pathUrl + "/preview/pjpg-" + i + ".jpg";
//        File pfilepath = new File(pimgDir);
//        File pf = pfilepath.getParentFile();
//        if (!pf.exists()) {
//          pf.mkdirs();
//        }
//        ImageMagickUtils.scale(oimgDir, pimgDir, 240, 180);
       list.add(imagePPT);
     }
   }
   // 拼接json字符串

ObjectMapper objectMapper = new ObjectMapper();
   String jsonlist = objectMapper.writeValueAsString(list);
   // logger.info(jsonlist);
   Map<String, Object> map=new HashMap<String, Object>();
   map.put("json", jsonlist.toString());
   map.put("totalPage", pageCount);
   return map;

}

/**
  * 提取pdf文字大纲
  * @param pdf_file
  * @return
  * @throws UnsupportedEncodingException
  * @throws Exception
  */
 public static String[] extractOutLineFromPDF(String pdf_file) throws UnsupportedEncodingException {
   String svndir = PPTConvertServersImpl.class.getResource("").getPath();
   svndir = svndir.split("WEB-INF")[0];
   svndir = svndir.replaceFirst("file:", "");
   logger.info(svndir);

String command = "/usr/bin/perl " + svndir + "WEB-INF/sh/pdf_outline.pl " + pdf_file;
   logger.info(command);

ByteArrayOutputStream writer = new ByteArrayOutputStream();

Command.run2(command, writer);
   String outline = writer.toString("utf-8");
   logger.info("title pdf,{}", outline);
   String[] items = outline.split("///");

return items;
 }

/**
  * 文件是否存在
  *
  * @param filename
  * @return @throws IOException
  */
 public static boolean exists(String filename) {
   try {
     File file = new File(filename);
     return file.exists();
   } catch (Exception e) {
     return false;
   }
 }

/**
  * 删除文件
  *
  * @param filename
  * @return
  */
 public static boolean unlink(String filename) {
   try {
     File file = new File(filename);
     if (file.isFile()) {
       file.delete();
       return true;
     }
     return false;
   } catch (Exception e) {
     return false;
   }
 }

/**
  * 拷贝文件
  *
  * @param file
  * @param newname
  * @param overwrite
  * @return
  */
 public static boolean copy(File file, String newname, boolean overwrite) {
   try {
     if (!overwrite && new File(newname).exists()) {
       return false;
     }
     FileInputStream input = new FileInputStream(file);
     File dest = new File(newname);
     if (!mkdir(dest.getParent())) {
       return false;
     }
     FileOutputStream output = new FileOutputStream(newname);
     byte[] b = new byte[1024 * 5];
     int len;
     while ((len = input.read(b)) != -1) {
       output.write(b, 0, len);
     }
     output.flush();
     output.close();
     input.close();
     return true;
   } catch (Exception e) {
     e.printStackTrace();
     return false;
   }
 }

/**
  * 创建目录
  *
  * @param dirname
  * @return
  */
 public static boolean mkdir(String dir) {
   try {
     File file = new File(dir);
     if (!file.exists()) {
       file.mkdirs();
     }
     return true;
   } catch (Exception e) {
     e.printStackTrace();
     return false;
   }
 }
}

上传ppt文件处理类：

package com.document.handle.controller;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;

import com.document.servers.PPTConvertServers;
import com.document.tool.FilenameUtils;
import com.document.tool.SystemConfig;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;

@Controller
public class PptToImageController {

private static final Logger logger = LoggerFactory.getLogger(PptToImageController.class);

private static final String TYPE_BLOB = "BLOB";

private static final String CALLBACK = "callback"; // 回调函数的参数名

@Autowired
 private PPTConvertServers pPTConvertServers;

@RequestMapping(value = "/convert/upload")
 public ModelAndView updateFile(HttpServletRequest request, HttpServletResponse response) {
   ModelAndView mav = new ModelAndView();
   mav.addObject("name", "Hello Word");
   mav.setViewName("/ppt/uploadFile");
   logger.info("/convert/upload");
   return mav;
 }

/**
  * 显示上传文件的页面表单。
  */
 @SuppressWarnings("unchecked")
 private ModelAndView showUploadForm(HttpServletRequest request, String type) {
   // 所有请求参数
   Map<String, String> params = new HashMap<String, String>();
   Enumeration<String> paramNames = request.getParameterNames();
   while (paramNames.hasMoreElements()) {
     String name = paramNames.nextElement();
     String value = request.getParameter(name);
     if (null != value) {
       params.put(name, value);
     }
   }

ModelAndView mav = new ModelAndView();
   mav.setViewName("/upload/" + type.toLowerCase());
   mav.addObject("parameters", params);
   return mav;
 }

/**
  * 保存用户上传的文件。
  * @throws UnsupportedEncodingException
  */
 private Map<String, Object> saveUploadedFile(HttpServletRequest request, MultipartFile file, String type) {

// 文件内容MD5串，避免文件重复上传
   String md5 = null;
   try {
     md5 = DigestUtils.md5Hex(file.getBytes());
     logger.info("文件内容MD5串，{}", md5);
   } catch (IOException e1) {
     // TODO Auto-generated catch block
     e1.printStackTrace();
   }

String originalFilename = file.getOriginalFilename();

String extension = FilenameUtils.getExtension(originalFilename); // 文件扩展名

String filename = null;
   if (md5 != null) {
     filename = FilenameUtils.generateFileNameMd5(extension, md5);
   } else {
     filename = FilenameUtils.generateFileName(extension);
   }

String filenameUrl = null; // 文件访问的URL
   String absoluteFilename = null; // 文件存储的绝对路径

filenameUrl = SystemConfig.getBlobUrl() + filename;
   absoluteFilename = SystemConfig.getBlobDirectory() + filename;

// 检查是否需要创建目录
   File filepath = new File(absoluteFilename);
   File parentFile = filepath.getParentFile();
   if (!parentFile.exists()) {
     parentFile.mkdirs();
   }

Map<String, Object> params = new HashMap<String, Object>();
   // 所有请求参数
   Enumeration<String> paramNames = request.getParameterNames();
   while (paramNames.hasMoreElements()) {
     String name = paramNames.nextElement();
     String value = request.getParameter(name);
     if (null != value) {
       params.put(name, value);
     }
   }

String pdftitle = originalFilename.substring(0, originalFilename.lastIndexOf("."));
   params.put("title", pdftitle);
   Map<String, Object> officeMap=new HashMap<String, Object>();
   if (filepath.exists()) {
     // 文件已上传过,文件进行替换
     try {
       officeMap = pPTConvertServers.replace_ppt(request, absoluteFilename, extension, pdftitle, filename);
       params.put("totalPage", officeMap.get("totalPage"));
       params.put("data", officeMap.get("json"));
       params.put("status", "success");
     } catch (Exception e) {
       // TODO Auto-generated catch block
       logger.info("把ppt文件转pdf失败，{}", e);
       params.put("status", "fail");
       params.put("data", "把ppt文件转pdf失败");
       params.put("totalPage", 0);
       e.printStackTrace();
     }

return params;
   }

// 保存文件
   BufferedOutputStream bos = null;
   try {
     byte[] fileBytes = file.getBytes();
     bos = new BufferedOutputStream(new FileOutputStream(filepath));
     bos.write(fileBytes);
   } catch (IOException e) {
     logger.error("保存'" + originalFilename + "'时发生异常，Cause: ", e);
   } finally {
     if (null != bos) {
       try {
         bos.close();
       } catch (IOException e) {
       }
     }
   }

// params.put("url", filenameUrl);
   // params.put("originalFilename", originalFilename);
   // params.put("filesize", file.getSize());

// 把ppt文件转pdf,pdf转图片
   try {
     officeMap = pPTConvertServers.deal_ppt(request, absoluteFilename, extension, pdftitle, filename);
     params.put("totalPage", officeMap.get("totalPage"));
     params.put("data", officeMap.get("json"));
     params.put("status", "success");
   } catch (Exception e) {
     // TODO Auto-generated catch block
     logger.info("把ppt文件转pdf失败，{}", e);
     params.put("status", "fail");
     params.put("data", "把ppt文件转pdf失败");
     params.put("totalPage", 0);
     e.printStackTrace();
   }

return params;
 }

/**
  * 处理文件上传。
  * @throws IOException
  *
  */
 @RequestMapping(value = "/convert/upload", method = RequestMethod.POST,produces = "text/html;charset=UTF-8")
 public @ResponseBody String uploadFilePost(HttpServletRequest request,
     @RequestParam("file") MultipartFile file) throws IOException {

String callback = request.getParameter(CALLBACK); // 回调函数的函数名
   String json = "请上传文件";
   Map<String, Object> params = new HashMap<String, Object>();

ObjectMapper mapper = new ObjectMapper();
   mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
   ObjectWriter writer = mapper.writerWithType(Map.class);

if (!file.isEmpty()) {
     params = saveUploadedFile(request, file, TYPE_BLOB);
     if (params == null) {
       params = new HashMap<String, Object>();
       json = "文件已上传过";
       params.put("status", "fail");
       params.put("data", json);
       json = writer.writeValueAsString(params);
       return json.toString();
     }

try {
       json = writer.writeValueAsString(params);
       // json = (String) params.get("data");
     } catch (Exception e) {
       logger.error("转换Blob上传参数为JSON时发生异常，Cause: ", e);
     }

if (StringUtils.isBlank(callback)) {
       return json.toString();
     } else {
       return callback + "(" + json.toString() + ");";
     }

}

// 还没上传文件的
   params.put("status", "fail");
   params.put("data", json);
   json = writer.writeValueAsString(params);
   return json.toString();
 }

}

预览图代理输出-----处理类：

package com.document.handle.controller;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import com.document.tool.ImageMagickUtils;
import com.document.tool.SystemConfig;

@Controller
public class ImageAgentController {

private static final Logger LOG = LoggerFactory.getLogger(ImageAgentController.class);

/**
  * ppt预览图片代理输出
  * @throws IOException
  */
 @RequestMapping("/preview/images/{year}/{month}/{md5id}/{preview}/{filename}.{ext}")
 public void cropImage(@PathVariable String year, @PathVariable String month, @PathVariable String md5id,@PathVariable String preview, @PathVariable String filename, @PathVariable String ext, HttpServletRequest request, HttpServletResponse response) throws IOException {
   //String rootDir = "/data05/ovp/images/";
   String rootDir = SystemConfig.getBlobDirectory();
   String oname = filename.substring(1,filename.length());//原图文件名
   String dirString = rootDir + year+"/" +month + "/" + md5id + "/"+oname+"." + ext;
   String targetFileString = rootDir + year+"/" +month + "/" + md5id + "/preview/" + filename + "." + ext;

LOG.info("corpImage..." + dirString + " -> " +targetFileString );
   File newfile = new File(targetFileString);
   String pathString = newfile.getParent();
   LOG.info("pathString...{} {}" , pathString);
   File pathFile = new File(pathString);
   if(!pathFile.exists()){
     LOG.info("---create file---");
     pathFile.mkdirs();
   }
   boolean status = ImageMagickUtils.scale(dirString, targetFileString, 240, 180);
   if(status){
     response.reset();
     response.setContentType("image/" + ext);

java.io.InputStream in = new java.io.FileInputStream(targetFileString);
     //FilenameUrlUtils.getImageFilename(targetFileString);

if ( in != null )
     {
       byte[] b = new byte[1024];
       int len;
       while( (len = in.read(b)) != -1 )
       {
         response.getOutputStream().write(b);  
       }

in.close();
     }
   }
 }

}

提取文字大纲的perl脚本：

use strict;
use warnings;
use utf8;
use open ':encoding(utf8)';
binmode(STDOUT, ":utf8");
sub trim($)
{
   my $string = shift;
   $string =~ s/^\s+//;
   $string =~ s/\s+$//;
   return $string;
}
if(!$ARGV[0]){
die;
}
open my $fh, "pdftotext -layout -enc UTF-8 $ARGV[0] - |" or die $!;
my $firstline=<$fh>;
print trim($firstline);
my $pageNum = 1;

while ( my $line = <$fh> ) {
 if ( $line =~ /\xC/ ) {
   my $count = ($line =~ tr/\xC//);
   for(my $i=0;$i<$count-1;$i++){
       print "///".$pageNum;
       $pageNum++;
   }
   if(trim($line)){
       print "///".trim($line);
   }
   $pageNum++;
 }
}
close $fh;

可能遇到的问题：

1、ppt转pdf时,遇到启动失败（不清楚是不是再次启动引起的）

2、转换后的pdf 表格里的中文会出现乱码

3、有时会出现关闭服务器的所用服务（尚不清楚什么原因引起的）

4、处理请求时，经常出现超时504

来源：https://blog.csdn.net/kenhins/article/details/49102067