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之前有寫了poi實現(xiàn)在線預(yù)覽的文章,里面也說到了使用openOffice也可以做到,這里就詳細(xì)介紹一下。
我的實現(xiàn)邏輯有兩種:
一、利用jodconverter(基于OpenOffice服務(wù))將文件(.doc、.docx、.xls、.ppt)轉(zhuǎn)化為html格式。
二、利用jodconverter(基于OpenOffice服務(wù))將文件(.doc、.docx、.xls、.ppt)轉(zhuǎn)化為pdf格式。
轉(zhuǎn)換成html格式大家都能理解,這樣就可以直接在瀏覽器上查看了,也就實現(xiàn)了在線預(yù)覽的功能;轉(zhuǎn)換成pdf格式這點,需要用戶安裝了Adobe Reader XI,這樣你會發(fā)現(xiàn)把pdf直接拖到瀏覽器頁面可以直接打開預(yù)覽,這樣也就實現(xiàn)了在線預(yù)覽的功能。
將文件轉(zhuǎn)化為html格式或者pdf格式
話不多說,直接上代碼。
package com.pdfPreview.util; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.ConnectException; import java.text.SimpleDateFormat; import java.util.Date; 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; /** * 利用jodconverter(基于OpenOffice服務(wù))將文件(*.doc、*.docx、*.xls、*.ppt)轉(zhuǎn)化為html格式或者pdf格式, * 使用前請檢查OpenOffice服務(wù)是否已經(jīng)開啟, OpenOffice進程名稱:soffice.exe | soffice.bin * * @author yjclsx */ public class Doc2HtmlUtil { private static Doc2HtmlUtil doc2HtmlUtil; /** * 獲取Doc2HtmlUtil實例 */ public static synchronized Doc2HtmlUtil getDoc2HtmlUtilInstance() { if (doc2HtmlUtil == null) { doc2HtmlUtil = new Doc2HtmlUtil(); } return doc2HtmlUtil; } /** * 轉(zhuǎn)換文件成html * * @param fromFileInputStream: * @throws IOException */ public String file2Html(InputStream fromFileInputStream, String toFilePath,String type) throws IOException { Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); String timesuffix = sdf.format(date); String docFileName = null; String htmFileName = null; if("doc".equals(type)){ docFileName = "doc_" + timesuffix + ".doc"; htmFileName = "doc_" + timesuffix + ".html"; }else if("docx".equals(type)){ docFileName = "docx_" + timesuffix + ".docx"; htmFileName = "docx_" + timesuffix + ".html"; }else if("xls".equals(type)){ docFileName = "xls_" + timesuffix + ".xls"; htmFileName = "xls_" + timesuffix + ".html"; }else if("ppt".equals(type)){ docFileName = "ppt_" + timesuffix + ".ppt"; htmFileName = "ppt_" + timesuffix + ".html"; }else{ return null; } File htmlOutputFile = new File(toFilePath + File.separatorChar + htmFileName); File docInputFile = new File(toFilePath + File.separatorChar + docFileName); if (htmlOutputFile.exists()) htmlOutputFile.delete(); htmlOutputFile.createNewFile(); if (docInputFile.exists()) docInputFile.delete(); docInputFile.createNewFile(); /** * 由fromFileInputStream構(gòu)建輸入文件 */ try { OutputStream os = new FileOutputStream(docInputFile); int bytesRead = 0; byte[] buffer = new byte[1024 * 8]; while ((bytesRead = fromFileInputStream.read(buffer)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); fromFileInputStream.close(); } catch (IOException e) { } OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100); try { connection.connect(); } catch (ConnectException e) { System.err.println("文件轉(zhuǎn)換出錯,請檢查OpenOffice服務(wù)是否啟動。"); } // convert DocumentConverter converter = new OpenOfficeDocumentConverter(connection); converter.convert(docInputFile, htmlOutputFile); connection.disconnect(); // 轉(zhuǎn)換完之后刪除word文件 docInputFile.delete(); return htmFileName; } /** * 轉(zhuǎn)換文件成pdf * * @param fromFileInputStream: * @throws IOException */ public String file2pdf(InputStream fromFileInputStream, String toFilePath,String type) throws IOException { Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); String timesuffix = sdf.format(date); String docFileName = null; String htmFileName = null; if("doc".equals(type)){ docFileName = "doc_" + timesuffix + ".doc"; htmFileName = "doc_" + timesuffix + ".pdf"; }else if("docx".equals(type)){ docFileName = "docx_" + timesuffix + ".docx"; htmFileName = "docx_" + timesuffix + ".pdf"; }else if("xls".equals(type)){ docFileName = "xls_" + timesuffix + ".xls"; htmFileName = "xls_" + timesuffix + ".pdf"; }else if("ppt".equals(type)){ docFileName = "ppt_" + timesuffix + ".ppt"; htmFileName = "ppt_" + timesuffix + ".pdf"; }else{ return null; } File htmlOutputFile = new File(toFilePath + File.separatorChar + htmFileName); File docInputFile = new File(toFilePath + File.separatorChar + docFileName); if (htmlOutputFile.exists()) htmlOutputFile.delete(); htmlOutputFile.createNewFile(); if (docInputFile.exists()) docInputFile.delete(); docInputFile.createNewFile(); /** * 由fromFileInputStream構(gòu)建輸入文件 */ try { OutputStream os = new FileOutputStream(docInputFile); int bytesRead = 0; byte[] buffer = new byte[1024 * 8]; while ((bytesRead = fromFileInputStream.read(buffer)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); fromFileInputStream.close(); } catch (IOException e) { } OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100); try { connection.connect(); } catch (ConnectException e) { System.err.println("文件轉(zhuǎn)換出錯,請檢查OpenOffice服務(wù)是否啟動。"); } // convert DocumentConverter converter = new OpenOfficeDocumentConverter(connection); converter.convert(docInputFile, htmlOutputFile); connection.disconnect(); // 轉(zhuǎn)換完之后刪除word文件 docInputFile.delete(); return htmFileName; } public static void main(String[] args) throws IOException { Doc2HtmlUtil coc2HtmlUtil = getDoc2HtmlUtilInstance(); File file = null; FileInputStream fileInputStream = null; file = new File("D:/poi-test/exportExcel.xls"); fileInputStream = new FileInputStream(file); // coc2HtmlUtil.file2Html(fileInputStream, "D:/poi-test/openOffice/xls","xls"); coc2HtmlUtil.file2pdf(fileInputStream, "D:/poi-test/openOffice/xls","xls"); file = new File("D:/poi-test/test.doc"); fileInputStream = new FileInputStream(file); // coc2HtmlUtil.file2Html(fileInputStream, "D:/poi-test/openOffice/doc","doc"); coc2HtmlUtil.file2pdf(fileInputStream, "D:/poi-test/openOffice/doc","doc"); file = new File("D:/poi-test/周報模版.ppt"); fileInputStream = new FileInputStream(file); // coc2HtmlUtil.file2Html(fileInputStream, "D:/poi-test/openOffice/ppt","ppt"); coc2HtmlUtil.file2pdf(fileInputStream, "D:/poi-test/openOffice/ppt","ppt"); file = new File("D:/poi-test/test.docx"); fileInputStream = new FileInputStream(file); // coc2HtmlUtil.file2Html(fileInputStream, "D:/poi-test/openOffice/docx","docx"); coc2HtmlUtil.file2pdf(fileInputStream, "D:/poi-test/openOffice/docx","docx"); } }
轉(zhuǎn)換成html和轉(zhuǎn)換成pdf的過程幾乎一樣,只是在創(chuàng)建輸出的File時前者命名為XXX.html,后者命名為XXX.pdf,在執(zhí)行converter.convert(docInputFile, htmlOutputFile);時,jodconverter會自己根據(jù)文件類型名轉(zhuǎn)換成對應(yīng)的文件。
注意,main方法里別file2Html和file2pdf都調(diào)用,會報錯的,要么轉(zhuǎn)html,要么轉(zhuǎn)pdf,只能選一個。還有就是在執(zhí)行之前,需要啟動openOffice的服務(wù):在openOffice目錄下的命令窗口中執(zhí)行soffice -headless -accept=”socket,host=127.0.0.1,port=8100;urp;” -nofirststartwizard即可啟動。
以上需要引入jodconverter的jar包。希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持創(chuàng)新互聯(lián)。
本文題目:Java實現(xiàn)在線預(yù)覽的示例代碼(openOffice實現(xiàn))
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