linux下java推送pdf文件到打印机方案汇总
方案一，将pdf转换成图片然后打印图片PDF转换成图片的方法使用PDFBox开元jar包需要导入pdfbox-1.8.4.jar 和pdfbox-app-1.8.4.jar 两个jar文件public static ListPdfToImage(String pdfFile) { try { String outputPrefix = pdfFile.substring(0, pdfFile.length() - 4); String imageFormat = "jpg";// 格式 PDDocument document = PDDocument.load(pdfFile); PDFImageWriter imageWriter = new PDFImageWriter(); int count = document.getNumberOfPages(); imageWriter.writeImage(document, imageFormat, "", 1, count, outputPrefix, 1, 170); document.close(); // 参数1-内部PDF文档，参数2-图片格式，参数3-密码，参数4-起始页，参数5-结束页，参数6-输出文件名，参数7-输出的图片色深--类型，参数8-还没研究 List imagelist = new ArrayList (); for (int i = 1; i <= count; i++) { String filepath = outputPrefix + i + ".jpg"; imagelist.add(filepath); } return imagelist; } catch (Exception e) { return null; } }
linux命令打印图片方法
"lp -d "+ printerName+ " -o scaling=100 -o fitplot -o page-botton=20 -o page-top=0 "+ jpgfile;另附图片添加水印的方法import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.Image;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;/** * 图片工具类， 图片水印，文字水印，缩放，补白等 * @author Carl He */public class ImageUtils { /**图片格式：JPG*/ private static final String PICTRUE_FORMATE_JPG = "jpg"; private ImageUtils(){} /** * 添加图片水印 * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg * @param waterImg 水印图片路径，如：C://myPictrue//logo.png * @param x 水印图片距离目标图片左侧的偏移量，如果x<0, 则在正中间 * @param y 水印图片距离目标图片上侧的偏移量，如果y<0, 则在正中间 * @param alpha 透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明)*/ public final static void pressImage(String targetImg, String waterImg, int x, int y, float alpha) { try { File file = new File(targetImg); Image image = ImageIO.read(file); int width = image.getWidth(null); int height = image.getHeight(null); BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = bufferedImage.createGraphics(); g.drawImage(image, 0, 0, width, height, null); Image waterImage = ImageIO.read(new File(waterImg)); // 水印文件 int width_1 = waterImage.getWidth(null); int height_1 = waterImage.getHeight(null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); int widthDiff = width - width_1; int heightDiff = height - height_1; if(x < 0){ x = widthDiff / 2; }else if(x > widthDiff){ x = widthDiff; } if(y < 0){ y = heightDiff / 2; }else if(y > heightDiff){ y = heightDiff; } g.drawImage(waterImage, x, y, width_1, height_1, null); // 水印文件结束 g.dispose(); ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file); } catch (IOException e) { e.printStackTrace(); } } /** * 添加文字水印 * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg * @param pressText 水印文字， 如：中国证券网 * @param fontName 字体名称， 如：宋体 * @param fontStyle 字体样式，如：粗体和斜体(Font.BOLD|Font.ITALIC) * @param fontSize 字体大小，单位为像素 * @param color 字体颜色 * @param x 水印文字距离目标图片左侧的偏移量，如果x<0, 则在正中间 * @param y 水印文字距离目标图片上侧的偏移量，如果y<0, 则在正中间 * @param alpha 透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明) * @param degree 水印图片旋转角度*/ public static void pressText(String targetImg, String pressText, String fontName, int fontStyle, int fontSize, Color color, int x, int y, float alpha,Integer degree) { try { File file = new File(targetImg); Image image = ImageIO.read(file); int width = image.getWidth(null); int height = image.getHeight(null); BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = bufferedImage.createGraphics(); g.drawImage(image, 0, 0, width, height, null); g.setFont(new Font(fontName, fontStyle, fontSize)); g.setColor(color); if (null != degree) { // 设置水印旋转 g.rotate(Math.toRadians(degree), (double) width / 2, (double) height / 2); } g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); int width_1 = fontSize * getLength(pressText); int height_1 = fontSize; int widthDiff = width - width_1; int heightDiff = height - height_1; if(x < 0){ x = widthDiff / 2; }else if(x > widthDiff){ x = widthDiff; } if(y < 0){ y = heightDiff / 2; }else if(y > heightDiff){ y = heightDiff; } g.drawString(pressText, x, y + height_1); g.dispose(); ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file); } catch (Exception e) { e.printStackTrace(); } } /** * 获取字符长度，一个汉字作为 1 个字符, 一个英文字母作为 0.5 个字符 * @param text * @return 字符长度，如：text="中国",返回 2；text="test",返回 2；text="中国ABC",返回 4.*/ public static int getLength(String text) { int textLength = text.length(); int length = textLength; for (int i = 0; i < textLength; i++) { if (String.valueOf(text.charAt(i)).getBytes().length > 1) { length++; } } return (length % 2 == 0) ? length / 2 : length / 2 + 1; } /** * 图片缩放 * @param filePath 图片路径 * @param height 高度 * @param width 宽度 * @param bb 比例不对时是否需要补白*/ public static void resize(String filePath, int height, int width, boolean bb) { try { double ratio = 0; //缩放比例 File f = new File(filePath); BufferedImage bi = ImageIO.read(f); Image itemp = bi.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH); //计算比例 if ((bi.getHeight() > height) || (bi.getWidth() > width)) { if (bi.getHeight() > bi.getWidth()) { ratio = (new Integer(height)).doubleValue() / bi.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / bi.getWidth(); } AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null); itemp = op.filter(bi, null); } if (bb) { BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setColor(Color.white); g.fillRect(0, 0, width, height); if (width == itemp.getWidth(null)) g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); else g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); g.dispose(); itemp = image; } ImageIO.write((BufferedImage) itemp, "jpg", f); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) throws IOException {// pressImage("C://pic//jpg", "C://pic//test.gif", 5000, 5000, 0f); pressText("d:/CA_SALES_printed_src1_target1.jpg", "This is testing paper.", "Arial", Font.BOLD|Font.ITALIC, 140, Color.BLUE, 670, 800, 0.4f,-45);// resize("C://pic//4.jpg", 1000, 500, true); System.out.println("ok"); }} 方案二，利用linux命令打印pdf"pdftops "+savedirpath+" - | lp -d "+printername+" -o scaling=97 -o fitplot -o page-botton=0 -o page-left=15 -o page-right=15 -o page-top=40";