简介
之前有写了poi实现在线预览的文章，里面也说到了使用openoffice也可以做到，这里就详细介绍一下。
我的实现逻辑有两种：
一、利用jodconverter(基于openoffice服务)将文件(.doc、.docx、.xls、.ppt)转化为html格式。
二、利用jodconverter(基于openoffice服务)将文件(.doc、.docx、.xls、.ppt)转化为pdf格式。
转换成html格式大家都能理解，这样就可以直接在浏览器上查看了，也就实现了在线预览的功能；转换成pdf格式这点，需要用户安装了adobe reader xi，这样你会发现把pdf直接拖到浏览器页面可以直接打开预览，这样也就实现了在线预览的功能。
将文件转化为html格式或者pdf格式
话不多说，直接上代码。
我要评论
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服务)将文件(*.doc、*.docx、*.xls、*.ppt)转化为html格式或者pdf格式，
* 使用前请检查openoffice服务是否已经开启, openoffice进程名称：soffice.exe | soffice.bin
*
* @author yjclsx
*/
public class doc2htmlutil {
private static doc2htmlutil doc2htmlutil;
/**
* 获取doc2htmlutil实例
*/
public static synchronized doc2htmlutil getdoc2htmlutilinstance() {
if (doc2htmlutil == null) {
doc2htmlutil = new doc2htmlutil();
}
return doc2htmlutil;
}
/**
* 转换文件成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构建输入文件
*/
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("文件转换出错，请检查openoffice服务是否启动。");
}
// convert
documentconverter converter = new openofficedocumentconverter(connection);
converter.convert(docinputfile, htmloutputfile);
connection.disconnect();
// 转换完之后删除word文件
docinputfile.delete();
return htmfilename;
}
/**
* 转换文件成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构建输入文件
*/
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("文件转换出错，请检查openoffice服务是否启动。");
}
// convert
documentconverter converter = new openofficedocumentconverter(connection);
converter.convert(docinputfile, htmloutputfile);
connection.disconnect();
// 转换完之后删除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/周报模版.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");
}
}
转换成html和转换成pdf的过程几乎一样，只是在创建输出的file时前者命名为xxx.html，后者命名为xxx.pdf，在执行converter.convert(docinputfile, htmloutputfile);时，jodconverter会自己根据文件类型名转换成对应的文件。
注意，main方法里别file2html和file2pdf都调用，会报错的，要么转html，要么转pdf，只能选一个。还有就是在执行之前，需要启动openoffice的服务：在openoffice目录下的命令窗口中执行soffice -headless -accept=”socket,host=127.0.0.1,port=8100;urp;” -nofirststartwizard即可启动。
以上需要引入jodconverter的jar包。希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
如对本文有疑问， 点击进行留言回复！！
Postgresql结合postgis使用java的JDBC连接
网友评论