pdf转图片工具类
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
public class Pdf2Png {
private final static String type = "png";
public static byte[] pdfToImage(byte[] pdfBytes) {
PDDocument pdDocument = null;
ByteArrayOutputStream bao = null;
byte[] imageBytes = null;
try {
int dpi = 296;
pdDocument = PDDocument.load(pdfBytes);
PDFRenderer renderer = new PDFRenderer(pdDocument);
///int pageCount = pdDocument.getNumberOfPages();
/* dpi越大转换后越清晰,相对转换速度越慢 */
/// for (int i = 0; i < pageCount; i++)
// 转化第一张
BufferedImage image = renderer.renderImageWithDPI(0, dpi);
bao = new ByteArrayOutputStream();
ImageIO.write(image, type, bao);
imageBytes = bao.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
// 这里需要关闭PDDocument,不然如果想要删除pdf文件时会提示文件正在使用,无法删除的情况
if (null != bao) {
bao.close();
}
if (null != pdDocument) {
pdDocument.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return imageBytes;
}
}
byte[]转字符串数据
适用场景:接口交互传输文件文章来源地址https://www.toymoban.com/news/detail-608428.html
import org.apache.commons.codec.binary.Base64;
import java.nio.file.Files;
import java.nio.file.Paths;
public class T {
public static void main(String[] args) throws IOException {
String fileName = "D:\\pdf.pdf";
byte[] bytes = Files.readAllBytes(Paths.get(fileName));
String pdfContent = Base64.encodeBase64String(bytes);
byte[] byte2 = Base64.decodeBase64(pdfContent);
String pdfContent2 = Base64.encodeBase64String(byte2);
System.out.println(pdfContent.equals(pdfContent2));
}
}
文章来源:https://www.toymoban.com/news/detail-608428.html
到了这里,关于【代码片】Pdf转Image的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网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TOY模板网!