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一、多余的话
java实现word转pdf可用的jar包不多，很多都是收费的。最近发现com.documents4j挺好用的，它支持在本机转换，也支持远程服务转换。但它依赖于微软的office。电脑需要安装office才能转换。鉴于没在linux中使用office，本文转换在windows中进行。
用途：主要是对word文件转换成pdf后，提供在线预览服务。也可以用于合同生成等。
二、前提条件
windows服务器或电脑需安装office软件。
三、代码实现
添加依赖：
<dependency><groupId>com.documents4j</groupId><artifactId>documents4j-local</artifactId><version>1.1.6</version></dependency><dependency><groupId>com.documents4j</groupId><artifactId>documents4j-transformer-msoffice-word</artifactId><version>1.1.6</version></dependency>转换代码类：WordToPdfUtil.java
package com.lan.fts.util;import com.documents4j.api.*;
import com.documents4j.job.LocalConverter;import java.io.*;
import java.util.concurrent.Future;public class WordToPdfUtil {private IConverter getConverter(){return LocalConverter.builder().build();}private void releaseConverter(IConverter converter){converter.shutDown();}public boolean wordToPdf(String fromFilePath, String pdfFilePath){boolean result = false;File inputFile = new File(fromFilePath);File outputFile = new File(pdfFilePath);InputStream inputStream=null;OutputStream outputStream = null;IConverter converter = getConverter();try {inputStream = new FileInputStream(inputFile);outputStream = new FileOutputStream(outputFile);String wordFilePath_low=fromFilePath.toLowerCase();if (wordFilePath_low.endsWith(".docx")) {Future<Boolean> schedule = converter.convert(inputStream, true).as(DocumentType.DOCX).to(outputStream, true).as(DocumentType.PDF).schedule();result = waitsShedule(schedule, 180000);}else if(wordFilePath_low.endsWith(".doc")){Future<Boolean> schedule = converter.convert(inputStream, true).as(DocumentType.DOC).to(outputStream, true).as(DocumentType.PDF).schedule();result = waitsShedule(schedule, 180000);}else if(wordFilePath_low.endsWith(".txt")){Future<Boolean> schedule = converter.convert(inputStream, true).as(DocumentType.TEXT).to(outputStream, true).as(DocumentType.PDF).schedule();result = waitsShedule(schedule, 180000);}} catch (FileNotFoundException e) {e.printStackTrace();} finally {try {if(outputStream!=null)outputStream.close();} catch (IOException e) {};try {if(inputStream!=null)inputStream.close();} catch (IOException e) {};releaseConverter(converter);}return result;}private boolean waitsShedule(Future<Boolean> schedule, int timeout){int time=0;while (!schedule.isDone()){MyThread.sleep(500);time+=500;if(time>timeout){schedule.cancel(true);return false;}}return true;}public static void main(String[] args) {// new WordToPdfUtil().wordToPdf("D:\\data\\out\\ffec88b6ee26397bf99834acb059f7b0.docx", "D:\\data\\out\\ffec88b6ee26397bf99834acb059f7b0.docx.pdf");}}说明：waitsShedule，是等待转换完成。如果超时，将取消转换任务
四、运行验证
public static void main(String[] args) {new WordToPdfUtil().wordToPdf("D:\\data\\out\\lanhezhong文件转换.docx", "D:\\data\\out\\lanhezhong文件转换.docx.pdf");}运行结果：
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author：蓝何忠
email：lanhezhong@163.com
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