java实现pdf预览

package com.pdfPreview.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("E:/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; } System.out.println("文件存在吗？"+swfFile); if (swfFile.exists()) { System.out.println("存在"); return true; } else { System.out.println("不存在"); return false; } } /** *返回文件路径       * @param      */ public String getswfPath() { if (swfFile.exists()) { String tempString = swfFile.getPath(); tempString = tempString.replaceAll("\\\\", "/"); System.out.println("最后文件路径为"+tempString); return tempString; } else { return "文件不存在"; } } /** * 设置输出路径 * * @param outputPath */ 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"); } } } }