基于Java编写一个PDF与Word文件转换工具

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


        
            com.e-iceblue
            http://repo.e-iceblue.cn/repository/maven-public/
        
    


    
        8
        8
    
    
        
            org.apache.pdfbox
            pdfbox
            2.0.4
        
        
            junit
            junit
            4.13.2
            test
        

        
            e-iceblue
            spire.doc.free
            3.9.0
        
    

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 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 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:\test\testpdf.pdf null

控制台输出:

转换方法: pdf2word  文件: D:\test\testFile.pdf
转换成功!文件路径: D:\test\testFile.doc

到此这篇关于基于Java编写一个PDF与Word文件转换工具的文章就介绍到这了,更多相关Java PDF转Word内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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