前言
前段时间一直使用到word文档转pdf或者pdf转word，寻思着用Java应该是可以实现的，于是花了点时间写了个文件转换工具
源码weloe/FileConversion (github.com)
主要功能就是word和pdf的文件转换，如下
- pdf 转 word
- pdf 转 图片
- word 转 图片
- word 转 html
- word 转 pdf
实现方法
主要使用了pdfbox Apache PDFBox | A Java PDF Library以及spire.doc Free Spire.Doc for Java | 100% 免费 Java Word 组件 (e-iceblue.cn)两个工具包
pom.xml
<repositories> <repository> <id>com.e-iceblue</id> <url>http://repo.e-iceblue.cn/repository/maven-public/</url> </repository> </repositories> <properties> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.apache.pdfbox</groupId> <artifactId>pdfbox</artifactId> <version>2.0.4</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13.2</version> <scope>test</scope> </dependency> <dependency> <groupId>e-iceblue</groupId> <artifactId>spire.doc.free</artifactId> <version>3.9.0</version> </dependency> </dependencies> 策略接口
public interface FileConversion { boolean isSupport(String s); String convert(String pathName,String dirAndFileName) throws Exception; } PDF转图片实现
public class PDF2Image implements FileConversion{ private String suffix = ".jpg"; public static final int DEFAULT_DPI = 150; @Override public boolean isSupport(String s) { return "pdf2image".equals(s); } @Override public String convert(String pathName,String dirAndFileName) throws Exception { String outPath = dirAndFileName + suffix; if(Files.exists(Paths.get(outPath))){ throw new RuntimeException(outPath+" 文件已存在"); } pdf2multiImage(pathName,outPath,DEFAULT_DPI); return outPath; } /** * pdf转图片 * 多页PDF会每页转换为一张图片，下面会有多页组合成一页的方法 * * @param pdfFile pdf文件路径 * @param outPath 图片输出路径 * @param dpi 相当于图片的分辨率，值越大越清晰，但是转换时间变长 */ public void pdf2multiImage(String pdfFile, String outPath, int dpi) { if (dpi <= 0) { // 如果没有设置DPI，默认设置为150 dpi = DEFAULT_DPI; } try (PDDocument pdf = PDDocument.load(new FileInputStream(pdfFile))) { int actSize = pdf.getNumberOfPages(); List<BufferedImage> picList = new ArrayList<>(); for (int i = 0; i < actSize; i++) { BufferedImage image = new PDFRenderer(pdf).renderImageWithDPI(i, dpi, ImageType.RGB); picList.add(image); } // 组合图片 ImageUtil.yPic(picList, outPath); } catch (IOException e) { e.printStackTrace(); } } } PDF转word实现
public class PDF2Word implements FileConversion { private String suffix = ".doc"; @Override public boolean isSupport(String s) { return "pdf2word".equals(s); } /** * * @param pathName * @throws IOException */ @Override public String convert(String pathName,String dirAndFileName) throws Exception { String outPath = dirAndFileName + suffix; if(Files.exists(Paths.get(outPath))){ throw new RuntimeException(outPath+" 文件已存在"); } pdf2word(pathName, outPath); return outPath; } private void pdf2word(String pathName, String outPath) throws IOException { PDDocument doc = PDDocument.load(new File(pathName)); int pagenumber = doc.getNumberOfPages(); // 创建文件 createFile(Paths.get(outPath)); FileOutputStream fos = new FileOutputStream(outPath); Writer writer = new OutputStreamWriter(fos, "UTF-8"); PDFTextStripper stripper = new PDFTextStripper(); stripper.setSortByPosition(true);//排序 stripper.setStartPage(1);//设置转换的开始页 stripper.setEndPage(pagenumber);//设置转换的结束页 stripper.writeText(doc, writer); writer.close(); doc.close(); } } word转html
public class Word2HTML implements FileConversion{ private String suffix = ".html"; @Override public boolean isSupport(String s) { return "word2html".equals(s); } @Override public String convert(String pathName, String dirAndFileName) { String outPath = dirAndFileName + suffix; if(Files.exists(Paths.get(outPath))){ throw new RuntimeException(outPath+" 文件已存在"); } Document doc = new Document(); doc.loadFromFile(pathName); doc.saveToFile(outPath, FileFormat.Html); doc.dispose(); return outPath; } } word转图片
public class Word2Image implements FileConversion{ private String suffix = ".jpg"; @Override public boolean isSupport(String s) { return "word2image".equals(s); } @Override public String convert(String pathName, String dirAndFileName) throws Exception { String outPath = dirAndFileName + suffix; if(Files.exists(Paths.get(outPath))){ throw new RuntimeException(outPath+" 文件已存在"); } Document doc = new Document(); //加载文件 doc.loadFromFile(pathName); //上传文档页数，也是最后要生成的图片数 Integer pageCount = doc.getPageCount(); // 参数第一个和第三个都写死 第二个参数就是生成图片数 BufferedImage[] image = doc.saveToImages(0, pageCount, ImageType.Bitmap); // 组合图片 List<BufferedImage> imageList = Arrays.asList(image); ImageUtil.yPic(imageList, outPath); return outPath; } } word转pdf
public class Word2PDF implements FileConversion{ private String suffix = ".pdf"; @Override public boolean isSupport(String s) { return "word2pdf".equals(s); } @Override public String convert(String pathName, String dirAndFileName) throws Exception { String outPath = dirAndFileName + suffix; if(Files.exists(Paths.get(outPath))){ throw new RuntimeException(outPath+" 文件已存在"); } //加载word Document document = new Document(); document.loadFromFile(pathName, FileFormat.Docx); //保存结果文件 document.saveToFile(outPath, FileFormat.PDF); document.close(); return outPath; } } 使用
输入转换方法，文件路径，输出路径(输出路径如果输入'null'则为文件同目录下同名不同后缀文件)
转换方法可选项：
- pdf2word
- pdf2image
- word2html
- word2image
- word2pdf
例如输入:
pdf2word D:testtestpdf.pdf null 控制台输出：
转换方法: pdf2word 文件: D:testtestFile.pdf 转换成功！文件路径: D:testtestFile.doc 
