1. 程式人生 > >Java實現線上預覽–openOffice實現

Java實現線上預覽–openOffice實現

Java實現線上預覽–openOffice實現

簡介

之前有寫了poi實現線上預覽的文章,裡面也說到了使用openOffice也可以做到,這裡就詳細介紹一下。
我的實現邏輯有兩種:
一、利用jodconverter(基於OpenOffice服務)將檔案(.doc、.docx、.xls、.ppt)轉化為html格式。
二、利用jodconverter(基於OpenOffice服務)將檔案(.doc、.docx、.xls、.ppt)轉化為pdf格式。
轉換成html格式大家都能理解,這樣就可以直接在瀏覽器上查看了,也就實現了線上預覽的功能;轉換成pdf格式這點,需要使用者安裝了Adobe Reader XI,這樣你會發現把pdf直接拖到瀏覽器頁面可以直接開啟預覽,這樣也就實現了線上預覽的功能。

將檔案轉化為html格式或者pdf格式

話不多說,直接上程式碼。

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(基於OpenOffice服務)將檔案(*.doc、*.docx、*.xls、*.ppt)轉化為html格式或者pdf格式, * 使用前請檢查OpenOffice服務是否已經開啟, OpenOffice程序名稱:soffice.exe | soffice.bin * *
@author yjclsx */
public class Doc2HtmlUtil { private static Doc2HtmlUtil doc2HtmlUtil; /** * 獲取Doc2HtmlUtil例項 */ public static synchronized Doc2HtmlUtil getDoc2HtmlUtilInstance() { if (doc2HtmlUtil == null) { doc2HtmlUtil = new Doc2HtmlUtil(); } return doc2HtmlUtil; } /** * 轉換檔案成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構建輸入檔案 */ 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("檔案轉換出錯,請檢查OpenOffice服務是否啟動。"); } // convert DocumentConverter converter = new OpenOfficeDocumentConverter(connection); converter.convert(docInputFile, htmlOutputFile); connection.disconnect(); // 轉換完之後刪除word檔案 docInputFile.delete(); return htmFileName; } /** * 轉換檔案成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構建輸入檔案 */ 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("檔案轉換出錯,請檢查OpenOffice服務是否啟動。"); } // convert DocumentConverter converter = new OpenOfficeDocumentConverter(connection); converter.convert(docInputFile, htmlOutputFile); connection.disconnect(); // 轉換完之後刪除word檔案 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/週報模版.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"); } }
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轉換成html和轉換成pdf的過程幾乎一樣,只是在建立輸出的File時前者命名為XXX.html,後者命名為XXX.pdf,在執行converter.convert(docInputFile, htmlOutputFile);時,jodconverter會自己根據檔案型別名轉換成對應的檔案。
注意,main方法裡別file2Html和file2pdf都呼叫,會報錯的,要麼轉html,要麼轉pdf,只能選一個。還有就是在執行之前,需要啟動openOffice的服務:在openOffice目錄下的命令視窗中執行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。

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Java實現線上預覽–openOffice實現

簡介

之前有寫了poi實現線上預覽的文章,裡面也說到了使用openOffice也可以做到,這裡就詳細介紹一下。
我的實現邏輯有兩種:
一、利用jodconverter(基於OpenOffice服務)將檔案(.doc、.docx、.xls、.ppt)轉化為html格式。
二、利用jodconverter(基於OpenOffice服務)將檔案(.doc、.docx、.xls、.ppt)轉化為pdf格式。
轉換成html格式大家都能理解,這樣就可以直接在瀏覽器上查看了,也就實現了線上預覽的功能;轉換成pdf格式這點,需要使用者安裝了Adobe Reader XI,這樣你會發現把pdf直接拖到瀏覽器頁面可以直接開啟預覽,這樣也就實現了線上預覽的功能。

將檔案轉化為html格式或者pdf格式

話不多說,直接上程式碼。

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(基於OpenOffice服務)將檔案(*.doc、*.docx、*.xls、*.ppt)轉化為html格式或者pdf格式,
 * 使用前請檢查OpenOffice服務是否已經開啟, OpenOffice程序名稱:soffice.exe | soffice.bin
 * 
 * @author yjclsx
 */
public class Doc2HtmlUtil {

    private static Doc2HtmlUtil doc2HtmlUtil;

    /**
     * 獲取Doc2HtmlUtil例項
     */
    public static synchronized Doc2HtmlUtil getDoc2HtmlUtilInstance() {
        if (doc2HtmlUtil == null) {
            doc2HtmlUtil = new Doc2HtmlUtil();
        }
        return doc2HtmlUtil;
    }

    /**
     * 轉換檔案成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構建輸入檔案
         */
        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("檔案轉換出錯,請檢查OpenOffice服務是否啟動。");
        }
        // convert
        DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
        converter.convert(docInputFile, htmlOutputFile);
        connection.disconnect();
        // 轉換完之後刪除word檔案
        docInputFile.delete();
        return htmFileName;
    }

    /**
     * 轉換檔案成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構建輸入檔案
         */
        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("檔案轉換出錯,請檢查OpenOffice服務是否啟動。");
        }
        // convert
        DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
        converter.convert(docInputFile, htmlOutputFile);
        connection.disconnect();
        // 轉換完之後刪除word檔案
        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/週報模版.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");

    }

}
  
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  • 194
  • 195
  • 196
  • 197
  • 198

轉換成html和轉換成pdf的過程幾乎一樣,只是在建立輸出的File時前者命名為XXX.html,後者命名為XXX.pdf,在執行converter.convert(docInputFile, htmlOutputFile);時,jodconverter會自己根據檔案型別名轉換成對應的檔案。
注意,main方法裡別file2Html和file2pdf都呼叫,會報錯的,要麼轉html,要麼轉pdf,只能選一個。還有就是在執行之前,需要啟動openOffice的服務:在openOffice目錄下的命令視窗中執行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。

        <link rel="stylesheet" href="https://csdnimg.cn/release/phoenix/template/css/markdown_views-ea0013b516.css">
            </div>