Java pdf和jpg互转案例
pdfbox:jpg转pdf：
/**
*使用pdfbox将jpg转成pdf
*@paramjpgStreamjpg输入流
*@parampdfPathpdf文件存储路径
*@throwsIOExceptionIOException
*/
publicstaticvoidjpgToPdf(InputStreamjpgStream,StringpdfPath)throwsIOException{
PDDocumentpdDocument=newPDDocument();
BufferedImageimage=ImageIO.read(jpgStream);
PDPagepdPage=newPDPage(newPDRectangle(image.getWidth(),image.getHeight()));
pdDocument.addPage(pdPage);
PDImageXObjectpdImageXObject=LosslessFactory.createFromImage(pdDocument,image);
PDPageContentStreamcontentStream=newPDPageContentStream(pdDocument,pdPage);
contentStream.drawImage(pdImageXObject,0,0,image.getWidth(),image.getHeight());
contentStream.close();
pdDocument.save(pdfPath);
pdDocument.close();
}
pdfbox:pdf转jpg：
staticvoidpdfbox()throwsIOException{
longstart=System.currentTimeMillis();
//pdf路径
URLurl=newURL("file:///D:/1.pdf");
InputStreamstream=URLUtil.getStream(url);
//加载解析PDF文件
PDDocumentdoc=PDDocument.load(stream);
PDFRendererpdfRenderer=newPDFRenderer(doc);
PDPageTreepages=doc.getPages();
intpageCount=pages.getCount();
for(inti=0;i
icepdf:pdf转jpg
Documentdocument=newDocument();
document.setUrl(newURL(pdfUrl));
intpageNum=document.getNumberOfPages();
for(inti=0;ijpg
if(i!=0){
continue;
}
//3、pdf->jpg
BufferedImagebim=(BufferedImage)document.getPageImage(i,
GraphicsRenderingHints.SCREEN,Page.BOUNDARY_CROPBOX,
rotation,scale);
os=newByteArrayOutputStream();
ImageIO.write(bim,"jpg",os);
//4、jpg->fdfs
byte[]datas=os.toByteArray();
InputStreamis=newByteArrayInputStream(datas);
补充知识：Java实现对png图片文件电子签名操作
我就废话不多说了，大家还是直接看代码吧~
/**
*根据图片像素位置添加用户电子签名
*@paramimagePath要操作的图片路径
*@paramsignImagePath电子签名图片路径
*@paramoutImagePath合成后输出图片路径
*@paramwidth像素位宽度
*@paramheight像素位高度
*/
publicstaticvoidsyntheticPicture(StringimagePath,StringsignImagePath,Integerwidth,Integerheight,StringoutImagePath){
try{
BufferedImagebig=ImageIO.read(newFile(imagePath));
BufferedImagesmall=ImageIO.read(newFile(signImagePath));
Graphics2Dg=big.createGraphics();
//根据图片像素位置粘贴带电子签名
g.drawImage(small,width,height,small.getWidth(),small.getHeight(),null);
g.dispose();
ImageIO.write(big,outImagePath.split("\\.")[1],newFile(outImagePath));
}catch(Exceptione){
thrownewRuntimeException(e);
}
}
以上这篇Javapdf和jpg互转案例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持毛票票。