网站建设有趣名称,淘宝网页版看直播,公司邮箱怎么注册申请,php网站开发如何赚钱目录
■JDK版本
■java代码・实现效果
■POM引用
■之前TIF相关的问题#xff08;两张TIF合并#xff09;
■对于成果物TIF#xff0c;需要考虑的点
■问题
■问题1#xff1a;无法生成TIF#xff0c;已解决
■问题2#xff1a;生成的TIF过大#xff0c;已解决 …目录
■JDK版本
■java代码・实现效果
■POM引用
■之前TIF相关的问题两张TIF合并
■对于成果物TIF需要考虑的点
■问题
■问题1无法生成TIF已解决
■问题2生成的TIF过大已解决
解决方法1使用LZW方式压缩 质量高
解决方法2让图片位深度为黑白binary并且使用CCITT方式压缩 质量低
■相关工具
SVF
foxit
■相关知识
ImageIO.write 的结果是 false 的原因
转换时报错 type 4 gsub lookup table is not supported
DPI是什么
一英寸 是多少厘米
图片的 位深度
■功能扩展
转换为TIF时能否在TIF中的某个坐标点再追加什么信息
4页的PDF取出一部分生成3页的PDF
印章在右上角
印章改进版坐标自己定义
PDF生成jpg图片
代码比较印章 和 JPG代码原理 ■JDK版本
1.8
■java代码・实现效果
package com.sxz.study.pdf;import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.ImageIO;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIF {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(E:\\Users\\sxz\\Desktop\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300, ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);// Save the BufferedImage as a TIF fileboolean flg ImageIO.write(image, tif, new File(E:\\Users\\sxz\\Desktop\\PDF\\output_ (pageNumber 1) .tif));System.out.println(flg);}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}}■POM引用 dependencygroupIdorg.apache.pdfbox/groupIdartifactIdpdfbox/artifactIdversion2.0.24/version !-- 可以根据需要选择最新版本 --/dependencydependencygroupIdorg.apache.pdfbox/groupIdartifactIdpdfbox-tools/artifactIdversion2.0.24/version !-- 可以根据需要选择最新版本 --/dependencydependencygroupIdorg.apache.pdfbox/groupIdartifactIdfontbox/artifactIdversion2.0.24/version !-- 可以根据需要选择最新版本 --/dependencydependencygroupIdcom.github.jai-imageio/groupIdartifactIdjai-imageio-core/artifactIdversion1.4.0/version/dependency ■之前TIF相关的问题两张TIF合并
TIF合并Java代码_jai-codec-CSDN博客 ■对于成果物TIF需要考虑的点
不是单纯生成TIF就可以了还要考虑以下问题
①白黒閾値 ②解像度 (分辨率) DPI ⇒ 一般设置为200 ③圧縮方式 -----CCITT T.4 ④位深度 182432 // 代码 ⇒ ImageType.BINARY ⑤XXXX高 XXXX幅 ⇒ 影响坐标位置 ⑥ファイルのサイズ XXXXKB ⑦分辨率单位 // TODO 代码如何指定 ⑧是否还要在生成的TIF上写入什么(番号)或者重新写入什么比如页码 1/4 ⇒1/5// 已经实现 ⑨页的PDF出力124页 // 已经实现 ⑩処理スピード处理速度
⑪事前確認 上流SystemのInput PDF 下流Systemへ連携のTIF 受到上面①⑦影響、下流系统能否正常读取 ■问题
■问题1无法生成TIF已解决
问题结果全部为false。
解决 方法1pom中添加如下引用 dependencygroupIdcom.github.jai-imageio/groupIdartifactIdjai-imageio-core/artifactIdversion1.4.0/version/dependency 方法2使用jdk9 ■问题2生成的TIF过大已解决 我原本文件才0.3M生成的TIF有3M的大小。。。。
方法2解决后的效果 解决方法1使用LZW方式压缩 质量高
package com.sxz.study.pdf;import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIFCompress {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);ImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(LZW);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}
} ImageType.GRAY
位深度是 8 解决方法2让图片位深度为黑白binary并且使用CCITT方式压缩 质量低 ImageType.GRAY 时代码运行会报错 Caused by: javax.imageio.IIOException: Bits per sample must be 1 for T4 compression! package com.sxz.study.pdf;import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIFCompress {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);ImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(LZW);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}
} ■相关工具
SVF
4141
1.1. SVF Connect for Java APIの機能概要 (wingarc.com) ウイングアークコーポレートサイト
会社概要 | ウイングアークコーポレートサイト (wingarc.com) foxit
xxx ■相关知识
ImageIO.write 的结果是 false 的原因 如果ImageIO.write方法返回false可能有几种原因导致无法成功将BufferedImage写入TIF文件。以下是一些常见原因和可能解决方法 缺少合适的ImageWriterImageIO在写入图像时需要能够识别和处理指定格式这里是TIF的ImageWriter。可能需要确保已经安装了支持TIF格式的插件。通常这些插件会提供相应的ImageWriter类。 解决方法可以尝试安装支持TIF格式的插件例如JAI Image I/O Tools。您可以在Maven中添加以下依赖项 dependencygroupIdcom.github.jai-imageio/groupIdartifactIdjai-imageio-core/artifactIdversion1.4.0/version/dependency
转换时报错 type 4 gsub lookup table is not supported 报错Type 4 gsub lookup table is not supported通常是由于字体文件中的某种字符映射表lookup table不受支持而导致的。字形字体OpenType字体中的子集subset可能包含一些复杂的字符映射表而某些库可能无法正确解析或处理这些表。您可以尝试以下解决方法 使用全字形字体Full OpenType Font如果可能尝试使用未经子集化的完整字形字体而不是子集化的字体。全字形字体包含完整的字符集和字符映射表可能更容易被解析和处理。 更新软件版本检查您使用的库或工具是否存在更新版本有时新版本可能会修复一些已知的问题。 选择其他字体或库尝试使用其他字体或处理字体的库来查看能否解决该问题。不同的库可能有不同的实现方式可能支持更多的字符映射表类型。 解析错误检查报错代码所在的地方看看是否可以在代码中进行特定的处理例如跳过不支持的部分或者采取其他替代方案。 DPI是什么 DPI代表“每英寸点数”Dots Per Inch是衡量输出设备打印或显示分辨率的度量单位。它表示在每英寸内打印机或显示器能够输出多少个像素点。在打印领域中DPI表示每英寸的打印点密度越高的DPI通常意味着更高的打印质量和更细致的图像。在显示器领域中DPI用来描述屏幕的像素密度影响屏幕展示的清晰度和细节。 例如如果一台打印机的DPI为600则表示在打印一英寸长度的纸张上这台打印机可以输出600个点像素从而打印出高分辨率的图像或文档。 在设计和图像处理中DPI也很重要因为它决定了图像在输出时的清晰度和质量。对于印刷品、海报、名片等需要高质量印刷的材料通常需要使用高DPI的图像以确保印刷效果。 总之DPI是衡量输出设备分辨率的重要指标对于打印、显示和图像处理等领域都有着重要作用。 一英寸 是多少厘米 一英寸等于2.54厘米。这是国际上普遍接受的英制和公制长度单位之间的换算关系。根据这个换算关系1英寸等于2.54厘米。 图片的 位深度 图片的位深度是指图像中每个像素的颜色值所占用的位数。位深度越高可以表示的颜色范围就越大图像也会更加细致。常见的位深度有 1位深度每个像素只有两种颜色通常用于黑白图像或简单的图标。 ImageType.BINARY 8位深度每个像素有256种颜色通常用于网页图像或简单的照片。 ImageType.GRAY 24位深度每个像素有约1677万种颜色通常用于高质量的照片。 32位深度除了颜色信息外还包含Alpha通道信息用于透明度处理。 不同的位深度会影响图像的颜色表现和细节展现选择合适的位深度能够更好地展现图片的效果。 ■功能扩展
转换为TIF时能否在TIF中的某个坐标点再追加什么信息 要在TIF图像的某个坐标点追加额外信息你可以使用Java开发中的图像处理库如ImageMagick或Java自带的图像处理库来在生成的TIF图像上绘制文本或其他图形。 下面是一个示例代码演示如何使用Java的Graphics2D来在TIF图像的指定坐标绘制文本信息 例子代码
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.tools.imageio.ImageIOUtil;import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;public class PdfToTifConverter {public static void main(String[] args) {try {File pdfFile new File(input.pdf);PDDocument document PDDocument.load(pdfFile);PDFRenderer pdfRenderer new PDFRenderer(document);for (int page 0; page document.getNumberOfPages(); page) {BufferedImage bim pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);// 在图像上绘制文本信息Graphics2D g bim.createGraphics();g.setColor(Color.RED);g.setFont(new Font(Arial, Font.PLAIN, 20));g.drawString(Additional Info, 100, 100);g.dispose();ImageIOUtil.writeImage(bim, output_ page .tif, 300);}document.close();} catch (Exception e) {e.printStackTrace();}}
} 完整代码
package com.sxz.study.pdf;import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPdfToTifComPressCCITTWithInfo {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\0830.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.BINARY);// 在图像上绘制文本信息// 抹去之前的信息Graphics2D g2 image.createGraphics();g2.setColor(Color.white);g2.setFont(new Font(Arial, Font.PLAIN, 80));g2.drawString(■■■■■■■■■■■■■■■■■■■■■■■■, 400, 400);g2.dispose();Graphics2D g3 image.createGraphics();g3.setColor(Color.white);g3.setFont(new Font(Arial, Font.PLAIN, 80));g3.drawString(■■■■■■■■■■■■■■■■■■■■■■■■, 405, 400);g3.dispose();Graphics2D g4 image.createGraphics();g4.setColor(Color.white);g4.setFont(new Font(Arial, Font.PLAIN, 80));g4.drawString(■■■■■■■■■■■■■■■■■■■■■■■■, 410, 400);g4.dispose();Graphics2D g5 image.createGraphics();g5.setColor(Color.white);g5.setFont(new Font(Arial, Font.PLAIN, 80));g5.drawString(■■■■■■■■■■■■■■■■■■■■■■■■, 415, 400);g5.dispose();// 写上想要的信息Graphics2D g image.createGraphics();g.setColor(Color.BLACK);g.setFont(new Font(Arial, Font.PLAIN, 20));g.drawString(66666666666666666666666666666666666666666, 410, 400);g.dispose();ImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(CCITT T.4);//writeParam.setCompressionQuality(1.0f);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}
}4页的PDF取出一部分生成3页的PDF package com.sxz.study.pdf;import java.io.File;
import java.io.IOException;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;public class TestPdfAllToPDF {// java代码实现iput11到页的PDFoutput 124页的PDFpublic static void main(String[] args) {try {File inputFile new File(C:\\test\\PDF\\input.pdf);PDDocument document PDDocument.load(inputFile);PDDocument outputDocument new PDDocument();int[] selectedPages {0, 1, 3}; // 选择要提取的页面索引从0开始for (int pageNumber : selectedPages) {if (pageNumber document.getNumberOfPages()) {PDPage page document.getPage(pageNumber);outputDocument.addPage(page);} else {System.out.println(Invalid page number: (pageNumber 1));}}outputDocument.save(C:\\test\\PDF\\output.pdf);outputDocument.close();document.close();System.out.println(Selected pages extracted successfully.);} catch (IOException e) {e.printStackTrace();}}
}
xxx 印章在右上角
部分代码参考
public static void main(String[] args) throws IOException {int imageSize 150;BufferedImage bufferedImage new BufferedImage(imageSize, imageSize, BufferedImage.TYPE_INT_ARGB);Graphics2D g2d bufferedImage.createGraphics();// 防止出现锯齿g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);g2d.setComposite(AlphaComposite.Src);g2d.setColor(Color.red);g2d.setStroke(new BasicStroke(3));// 绘画起点xy坐标并非圆心坐标g2d.drawOval(2, 2, imageSize - 4, imageSize - 4);// 绘画五角星int r 20;int centerPoint imageSize / 2;MapString, ListInteger pointersMap new HashMap();// 五角星6点坐标 O为圆心点pointersMap.put(O, Arrays.asList(centerPoint, centerPoint));pointersMap.put(A, Arrays.asList(centerPoint, centerPoint - r));pointersMap.put(B, Arrays.asList((int)(centerPoint Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));pointersMap.put(C, Arrays.asList((int)(centerPoint Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(D, Arrays.asList((int)(centerPoint - Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(E, Arrays.asList((int)(centerPoint - Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));// 6点组合绘画图像ListString pointerComposes Arrays.asList(A,D,O,C, B,E,O,D, C,A,O,E, D,A,O,B, E,C,O,B);// 查找绘画点进行绘画for (String pointerCompose : pointerComposes) {String[] pointerKeys pointerCompose.split(,);Polygon polygon new Polygon();for (String pointerKey : pointerKeys) {polygon.addPoint(pointersMap.get(pointerKey).get(0), pointersMap.get(pointerKey).get(1));}g2d.fillPolygon(polygon);}int whiteSpace 75;double padding 1.5;String companyName XXXXXXXXXXXXXXXXXX;// 根据名称长度 动态设置字体大小 防止文字过多发生文字碰撞int fontSize (60 - companyName.length()) / 3;// 平移画布使环形文字在圆圈内g2d.translate(centerPoint - fontSize / 2, 0);// 文字开始位置 大概在左下角g2d.rotate(((double) whiteSpace / 360) * Math.PI Math.PI, fontSize / 2, centerPoint);Font font new Font(FangSong_GB2312, Font.ROMAN_BASELINE, fontSize);g2d.setFont(font);// 在文字开始位置 第二个字符开始进行按计算角度进行旋转 从而生成环形文字double rotateAngle (double) (360 - whiteSpace) * Math.PI / (180 * (companyName.length() - 1));for (int i 0; i companyName.toCharArray().length; i) {if (i ! 0) {g2d.rotate(rotateAngle, fontSize/2, centerPoint);}g2d.drawString(String.valueOf(companyName.toCharArray()[i]), 0, (int) (fontSize * padding));}ByteArrayOutputStream baos new ByteArrayOutputStream();ImageIO.write(bufferedImage, png, baos);String path String.format(D:/data/seal_image/seal.%s.png,DateTimeFormatter.ofPattern(yyyyMMddHHmmssSSS).format(LocalDateTime.now()));File file new File(path);FileOutputStream fileOutputStream new FileOutputStream(file);fileOutputStream.write(baos.toByteArray());baos.close();fileOutputStream.close();}全部代码
package com.sxz.study.pdf;import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Polygon;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIFCompressLZWWithStamp {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);// 在图像上绘制 印章Graphics2D g2d image.createGraphics();int imageSize 150;// 防止出现锯齿g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);g2d.setComposite(AlphaComposite.Src);g2d.setColor(Color.red);g2d.setStroke(new BasicStroke(3));// 绘画起点xy坐标并非圆心坐标g2d.drawOval(2, 2, imageSize - 4, imageSize - 4);// 绘画五角星int r 20;int centerPoint imageSize / 2;MapString, ListInteger pointersMap new HashMap();// 五角星6点坐标 O为圆心点pointersMap.put(O, Arrays.asList(centerPoint, centerPoint));pointersMap.put(A, Arrays.asList(centerPoint, centerPoint - r));pointersMap.put(B, Arrays.asList((int)(centerPoint Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));pointersMap.put(C, Arrays.asList((int)(centerPoint Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(D, Arrays.asList((int)(centerPoint - Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(E, Arrays.asList((int)(centerPoint - Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));// 6点组合绘画图像ListString pointerComposes Arrays.asList(A,D,O,C, B,E,O,D, C,A,O,E, D,A,O,B, E,C,O,B);// 查找绘画点进行绘画for (String pointerCompose : pointerComposes) {String[] pointerKeys pointerCompose.split(,);Polygon polygon new Polygon();for (String pointerKey : pointerKeys) {polygon.addPoint(pointersMap.get(pointerKey).get(0), pointersMap.get(pointerKey).get(1));}g2d.fillPolygon(polygon);}int whiteSpace 75;double padding 1.5;String companyName 中国足球七比零;// 根据名称长度 动态设置字体大小 防止文字过多发生文字碰撞int fontSize (60 - companyName.length()) / 3;// 平移画布使环形文字在圆圈内g2d.translate(centerPoint - fontSize / 2, 0);// 文字开始位置 大概在左下角g2d.rotate(((double) whiteSpace / 360) * Math.PI Math.PI, fontSize / 2, centerPoint);Font font new Font(FangSong_GB2312, Font.ROMAN_BASELINE, fontSize);g2d.setFont(font);// 在文字开始位置 第二个字符开始进行按计算角度进行旋转 从而生成环形文字double rotateAngle (double) (360 - whiteSpace) * Math.PI / (180 * (companyName.length() - 1));for (int i 0; i companyName.toCharArray().length; i) {if (i ! 0) {g2d.rotate(rotateAngle, fontSize/2, centerPoint);}g2d.drawString(String.valueOf(companyName.toCharArray()[i]), 0, (int) (fontSize * padding));}ByteArrayOutputStream baos new ByteArrayOutputStream();g2d.setColor(Color.BLACK);g2d.dispose();// String path String.format(D:/data/seal_image/seal.%s.png,
// DateTimeFormatter.ofPattern(yyyyMMddHHmmssSSS).format(
// LocalDateTime.now()));
// File file new File(path);
// FileOutputStream fileOutputStream new FileOutputStream(file);
// fileOutputStream.write(baos.toByteArray());
// baos.close();
// fileOutputStream.close();// ----endImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(LZW);//writeParam.setCompressionQuality(1.0f);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}
} 印章改进版坐标自己定义
初版 修改前 Base
package com.sxz.study.pdf;import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Polygon;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIFCompressLZWWithStampXY {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);// 打印图章printStamp(image, 0, 0);ImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(LZW);//writeParam.setCompressionQuality(1.0f);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}public static void printStamp(BufferedImage image, int xxx ,int yyy){// 在图像上绘制 印章Graphics2D g2d image.createGraphics();int imageSize 150;// 防止出现锯齿g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);g2d.setComposite(AlphaComposite.Src);g2d.setColor(Color.red);g2d.setStroke(new BasicStroke(3));// 绘画起点xy坐标并非圆心坐标g2d.drawOval(2, 2, imageSize - 4, imageSize - 4);// 绘画五角星int r 20;int centerPoint imageSize / 2;MapString, ListInteger pointersMap new HashMap();// 五角星6点坐标 O为圆心点pointersMap.put(O, Arrays.asList(centerPoint, centerPoint));pointersMap.put(A, Arrays.asList(centerPoint, centerPoint - r));pointersMap.put(B, Arrays.asList((int)(centerPoint Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));pointersMap.put(C, Arrays.asList((int)(centerPoint Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(D, Arrays.asList((int)(centerPoint - Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(E, Arrays.asList((int)(centerPoint - Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));// 6点组合绘画图像ListString pointerComposes Arrays.asList(A,D,O,C, B,E,O,D, C,A,O,E, D,A,O,B, E,C,O,B);// 查找绘画点进行绘画for (String pointerCompose : pointerComposes) {String[] pointerKeys pointerCompose.split(,);Polygon polygon new Polygon();for (String pointerKey : pointerKeys) {polygon.addPoint(pointersMap.get(pointerKey).get(0), pointersMap.get(pointerKey).get(1));}g2d.fillPolygon(polygon);}int whiteSpace 75;double padding 1.5;String companyName 中国足球七比零;// 根据名称长度 动态设置字体大小 防止文字过多发生文字碰撞int fontSize (60 - companyName.length()) / 3;// 平移画布使环形文字在圆圈内g2d.translate(centerPoint - fontSize / 2, 0);// 文字开始位置 大概在左下角g2d.rotate(((double) whiteSpace / 360) * Math.PI Math.PI, fontSize / 2, centerPoint);Font font new Font(FangSong_GB2312, Font.ROMAN_BASELINE, fontSize);g2d.setFont(font);// 在文字开始位置 第二个字符开始进行按计算角度进行旋转 从而生成环形文字double rotateAngle (double) (360 - whiteSpace) * Math.PI / (180 * (companyName.length() - 1));for (int i 0; i companyName.toCharArray().length; i) {if (i ! 0) {g2d.rotate(rotateAngle, fontSize/2, centerPoint);}g2d.drawString(String.valueOf(companyName.toCharArray()[i]), 0, (int) (fontSize * padding));}g2d.setColor(Color.BLACK);g2d.dispose();}}
定义坐标位置 效果 代碼修改后可用代碼
package com.sxz.study.pdf;import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Polygon;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToTIFCompressLZWWithStampXY {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Test.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.GRAY);// 打印图章printStamp(image, 600, 500);ImageWriter writer ImageIO.getImageWritersByFormatName(tiff).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);writeParam.setCompressionType(LZW);//writeParam.setCompressionQuality(1.0f);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .tif));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}public static void printStamp(BufferedImage image, int xxx ,int yyy){// 在图像上绘制 印章Graphics2D g2d image.createGraphics();int imageSize 150;// 防止出现锯齿g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);g2d.setComposite(AlphaComposite.Src);g2d.setColor(Color.red);g2d.setStroke(new BasicStroke(3));// 绘画起点xy坐标并非圆心坐标g2d.drawOval(2 xxx, 2 yyy, imageSize - 4, imageSize - 4);// 绘画五角星int r 20;int centerPoint imageSize / 2;MapString, ListInteger pointersMap new HashMap();// 五角星6点坐标 O为圆心点pointersMap.put(O, Arrays.asList(centerPoint, centerPoint));pointersMap.put(A, Arrays.asList(centerPoint, centerPoint - r));pointersMap.put(B, Arrays.asList((int)(centerPoint Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));pointersMap.put(C, Arrays.asList((int)(centerPoint Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(D, Arrays.asList((int)(centerPoint - Math.sin(0.2 * Math.PI) * r), (int)(centerPoint Math.cos(0.2 * Math.PI) * r)));pointersMap.put(E, Arrays.asList((int)(centerPoint - Math.sin(0.4 * Math.PI) * r), (int)(centerPoint - Math.cos(0.4 * Math.PI) * r)));// 6点组合绘画图像ListString pointerComposes Arrays.asList(A,D,O,C, B,E,O,D, C,A,O,E, D,A,O,B, E,C,O,B);// 查找绘画点进行绘画for (String pointerCompose : pointerComposes) {String[] pointerKeys pointerCompose.split(,);Polygon polygon new Polygon();for (String pointerKey : pointerKeys) {polygon.addPoint(pointersMap.get(pointerKey).get(0) xxx, pointersMap.get(pointerKey).get(1) yyy);}g2d.fillPolygon(polygon);}int whiteSpace 75;double padding 1.5;String companyName 中国足球七比零;// 根据名称长度 动态设置字体大小 防止文字过多发生文字碰撞int fontSize (60 - companyName.length()) / 3;// 平移画布使环形文字在圆圈内g2d.translate((centerPoint - fontSize / 2) xxx, 0 yyy);// 文字开始位置 大概在左下角g2d.rotate(((double) whiteSpace / 360) * Math.PI Math.PI, fontSize / 2, centerPoint);Font font new Font(FangSong_GB2312, Font.ROMAN_BASELINE, fontSize);g2d.setFont(font);// 在文字开始位置 第二个字符开始进行按计算角度进行旋转 从而生成环形文字double rotateAngle (double) (360 - whiteSpace) * Math.PI / (180 * (companyName.length() - 1));for (int i 0; i companyName.toCharArray().length; i) {if (i ! 0) {g2d.rotate(rotateAngle, fontSize/2, centerPoint);}g2d.drawString(String.valueOf(companyName.toCharArray()[i]), 0 , (int) (fontSize * padding) );}g2d.setColor(Color.BLACK);g2d.dispose();}} PDF生成jpg图片
package com.sxz.study.pdf;import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;public class TestPDFToJpg {public static void main(String[] args) {try {// Load the PDF documentPDDocument document PDDocument.load(new File(C:\\test\\PDF\\Java.pdf));// Create a PDF rendererPDFRenderer pdfRenderer new PDFRenderer(document);// Iterate over each page in the PDF documentfor (int pageNumber 0; pageNumber document.getNumberOfPages(); pageNumber) {// Render the PDF page to a BufferedImage// BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 300,// ImageType.RGB);BufferedImage image pdfRenderer.renderImageWithDPI(pageNumber, 200, ImageType.RGB);ImageWriter writer ImageIO.getImageWritersByFormatName(jpg).next();ImageWriteParam writeParam writer.getDefaultWriteParam();writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
// writeParam.setCompressionType(LZW);// 创建输出文件流FileImageOutputStream output new FileImageOutputStream(new File(C:\\test\\PDF\\output_ (pageNumber 1) .jpg));writer.setOutput(output);// 写入压缩后的TIF图像writer.write(null, new IIOImage(image, null, null), writeParam);// 关闭输出流output.close();}// Close the PDF documentdocument.close();System.out.println(PDF converted to TIF successfully);} catch (Exception e) {e.printStackTrace();}}
} 代码比较印章 和 JPG代码原理
