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, Strin