Java Image.scalePercent方法代码示例

import com.itextpdf.text.Image; //导入方法依赖的package包/类
public static void writeSimplePdf() throws Exception{
			//1.新建document对象
			//第一个参数是页面大小。接下来的参数分别是左、右、上和下页边距。
			Document document = new Document(PageSize.A4, 50, 50, 50, 50);
			//2.建立一个书写器(Writer)与document对象关联，通过书写器(Writer)可以将文档写入到磁盘中。
			//创建 PdfWriter 对象 第一个参数是对文档对象的引用，第二个参数是文件的实际名称，在该名称中还会给出其输出路径。
			PdfWriter writer = PdfWriter.getInstance(document, 	new FileOutputStream("D:\\Documents\\ITextTest.pdf"));
			//3.打开文档
			document.open();		
			//4.向文档中添加内容
			//通过 com.lowagie.text.Paragraph 来添加文本。可以用文本及其默认的字体、颜色、大小等等设置来创建一个默认段落
			BaseFont bfChinese = BaseFont.createFont("STSong-Light","UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
			Font fontChinese = new Font(bfChinese, 22, Font.BOLD, BaseColor.BLACK);
			
			document.add(new Paragraph("sdfsdfsd全是中文显示了没.fsdfsfs",fontChinese));
			document.add(new Paragraph("Some more text on the 	first page with different color and font type.",
					FontFactory.getFont(FontFactory.COURIER, 14, Font.BOLD, new BaseColor(255, 150, 200))));
			Paragraph pragraph=new Paragraph("你这里有中亠好", fontChinese);
			document.add(pragraph);
			
			//图像支持格式 GIF, Jpeg, PNG, wmf
			Image gif = Image.getInstance("F:/keyworkspace/survey/WebRoot/images/logo/snlogo.png");
			gif.setBorder(5);
			gif.scaleAbsolute(30,30);
			gif.setAlignment(Image.RIGHT|Image.TEXTWRAP);
			document.add(gif);
			Paragraph pragraph11=new Paragraph("你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好你这里有中亠好", fontChinese);
			document.add(pragraph11);
			
			Image gif15 = Image.getInstance("F:/keyworkspace/survey/WebRoot/images/logo/snlogo.png");
//			gif15.setBorder(50);
			gif15.setBorder(Image.BOX);
			gif15.setBorderColor(BaseColor.RED);
//			gif15.setBorderColorBottom(borderColorBottom)
			gif15.setBorderWidth(1);
			gif15.scalePercent(50);
			document.add(gif15);
			//5.关闭文档
			document.close();
		}
 

import com.itextpdf.text.Image; //导入方法依赖的package包/类
private static PdfPCell getPhotoCell(BufferedImage bufferedImage, float scalePercent, boolean isHorizontallyCentered) throws BadElementException, IOException {
	Image jpeg = Image.getInstance(bufferedImage, null);
	jpeg.scalePercent(scalePercent);
	jpeg.setAlignment(Image.MIDDLE);
	PdfPCell photoCell = new PdfPCell(jpeg);
	photoCell.setBorder(0);
	if (isHorizontallyCentered) {
		photoCell.setHorizontalAlignment(Element.ALIGN_CENTER);
	} else {
		photoCell.setHorizontalAlignment(Element.ALIGN_RIGHT);
	}

	photoCell.setVerticalAlignment(Element.ALIGN_TOP);
	int height = (int) Math.ceil(bufferedImage.getHeight() * scalePercent / 100);
	photoCell.setFixedHeight(height);
	return photoCell;
}
 

import com.itextpdf.text.Image; //导入方法依赖的package包/类
private float reshapeImage(Image image, float imagewidthmax, float imageheightmax){

		float imageheight = image.getHeight();
		float imagewidth = image.getWidth();
		float scaler;
		if((imageheightmax>imageheight)&&(imageheightmax>imagewidth)) return 1;
		if(imageheight < imagewidth){
			
			scaler = imagewidthmax/image.getWidth()*100;	
			image.scalePercent(scaler);
		}
		else {
			scaler = imageheightmax/image.getHeight()*100;
			image.scalePercent(scaler);
		}
		return scaler/100;
	}
 

import com.itextpdf.text.Image; //导入方法依赖的package包/类
public static byte[] stampLayer(InputStream _pdfFile, Image iImage, int x, int y, String layername, boolean readLayers) throws IOException, DocumentException
{
    PdfReader reader = new PdfReader(_pdfFile);

    try (   ByteArrayOutputStream ms = new ByteArrayOutputStream()  )
    {
        PdfStamper stamper = new PdfStamper(reader, ms);
        //Don't delete otherwise the stamper flattens the layers
        if (readLayers)
            stamper.getPdfLayers();

        PdfLayer logoLayer = new PdfLayer(layername, stamper.getWriter());
        PdfContentByte cb = stamper.getUnderContent(1);
        cb.beginLayer(logoLayer);

        //300dpi
        iImage.scalePercent(24f);
        iImage.setAbsolutePosition(x, y);
        cb.addImage(iImage);

        cb.endLayer();
        stamper.close();

        return (ms.toByteArray());
    }
}
 

import com.itextpdf.text.Image; //导入方法依赖的package包/类
public void addLogo(PdfContentByte cb, String imagePath, float xPos, float yPos) throws MalformedURLException, IOException, DocumentException {
    URL imageUrl = getClass().getResource(imagePath + "/IPAT_logo_Relaunch2016_RZ_RGB.jpg");
    final Image logoImage = Image.getInstance(imageUrl);
    logoImage.setAbsolutePosition(xPos, yPos);
    logoImage.scalePercent(3f, 3f);
    cb.addImage(logoImage);
}
 

import com.itextpdf.text.Image; //导入方法依赖的package包/类
private static void scaleToFit(Document document, Image image) {
    float scale = ((document.getPageSize().getWidth() - document.leftMargin()
            - document.rightMargin()) / image.getWidth()) * 100;
    image.scalePercent(scale);
}