实现PDF转HTML有多种方式,
今天记录下以图片的形式,转化为HTML。
【原理分析】利用pdfbox解析pdf文档,按照分页来拆分,以每一页转化为一个图片,依次类推,将每一个图片拼接到HTML中,则实现了PDF转HTML,而且可以保留原pdf的文档格式。
【maven依赖】
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox-tools</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>fontbox</artifactId>
<version>2.0.4</version>
</dependency>
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
public class Pdf2HTML {
public static void PdfToImage(String pdfurl) {
StringBuffer buffer = new StringBuffer();
FileOutputStream fos;
PDDocument document;
File pdfFile;
int size;
BufferedImage image;
FileOutputStream out;
Long randStr = 0l;
//PDF转换成HTML保存的文件夹
String path = "E:\\Pdf2HTML";
File htmlsDir = new File(path);
if (!htmlsDir.exists()) {
htmlsDir.mkdirs();
}
File htmlDir = new File(path + "/");
if (!htmlDir.exists()) {
htmlDir.mkdirs();
}
try {
//遍历处理pdf附件
randStr = System.currentTimeMillis();
buffer.append("<!doctype html>\r\n");
buffer.append("<head>\r\n");
buffer.append("<meta charset=\"UTF-8\">\r\n");
buffer.append("</head>\r\n");
buffer.append("<body style=\"background-color:gray;\">\r\n");
buffer.append("<style>\r\n");
buffer.append("img {background-color:#fff; text-align:center; width:100%; max-width:100%;margin-top:6px;}\r\n");
buffer.append("</style>\r\n");
document = new PDDocument();
//pdf附件
pdfFile = new File(pdfurl);
document = PDDocument.load(pdfFile, (String) null);
size = document.getNumberOfPages();
Long start = System.currentTimeMillis(), end = null;
System.out.println("===>pdf : " + pdfFile.getName() + " , size : " + size);
PDFRenderer reader = new PDFRenderer(document);
for (int i = 0; i < size; i++) {
//image = newPDFRenderer(document).renderImageWithDPI(i,130,ImageType.RGB);
image = reader.renderImage(i, 1.5f);
//生成图片,保存位置
out = new FileOutputStream(path + "/" + "image" + "_" + i + ".jpg");
ImageIO.write(image, "png", out); //使用png的清晰度
//将图片路径追加到网页文件里
buffer.append("<img src=\"" + path + "/" + "image" + "_" + i + ".jpg\"/>\r\n");
image = null;
out.flush();
out.close();
}
reader = null;
document.close();
buffer.append("</body>\r\n");
buffer.append("</html>");
end = System.currentTimeMillis() - start;
System.out.println("===> Reading pdf times: " + (end / 1000));
start = end = null;
//生成网页文件
fos = new FileOutputStream(path + randStr + ".html");
System.out.println(path + randStr + ".html");
fos.write(buffer.toString().getBytes());
fos.flush();
fos.close();
buffer.setLength(0);
} catch (Exception e) {
System.out.println("===>Reader parse pdf to jpg error : " + e.getMessage());
e.printStackTrace();
}
}
public static void main(String[] args) {
String pdf = "E:\\Pdf2HTML\\java开发工程师.pdf";
//传入PDF地址
PdfToImage(pdf);
}
}