标签:图片 根据 The int dispose original draw type ali
骑缝章是用于往来业务合同,以确保合同真实、有效的印章加盖方法,是一种防范风险的重要方式。在Java程序中,可以通过使用工具来辅助加盖这种骑缝章。方式1:通过官网下载jar包,并解压,手动导入lib文件夹下的Spire.Pdf.jar文件。
方式2:通过创建Maven程序,在pom.xml中配置maven仓库路径并指定Free Spire.PDF for Java 的依赖,配置完成后,在IDEA中,点击“Import Changes”导入JAR包:
<repositories>
<repository>
<id>com.e-iceblue</id>
<url>http://repo.e-iceblue.cn/repository/maven-public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.pdf.free</artifactId>
<version>2.6.3</version>
</dependency>
</dependencies>
(Ecllipse的导入方法,参考这篇文章)
jar导入结果如下图所示:
import com.spire.pdf.*;
import com.spire.pdf.graphics.PdfGraphicsUnit;
import com.spire.pdf.graphics.PdfImage;
import com.spire.pdf.graphics.PdfUnitConvertor;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class AcrossPageSeal {
public static void main(String[] args) throws IOException {
//加载测试文档
PdfDocument pdf = new PdfDocument();
pdf.loadFromFile("test.pdf");
//获取分割后的印章图片
BufferedImage[] images = GetImage(pdf.getPages().getCount());
float x = 0;
float y = 0;
//实例化PdfUnitConvertor类
PdfUnitConvertor convert = new PdfUnitConvertor();
PdfPageBase pageBase;
//将图片绘制到PDF页面上的指定位置
for (int i = 0; i < pdf.getPages().getCount(); i++)
{
BufferedImage image= images[ i ];
pageBase = pdf.getPages().get(i);
x = (float)pageBase.getSize().getWidth() - convert.convertUnits(image.getWidth(), PdfGraphicsUnit.Point, PdfGraphicsUnit.Pixel) + 40;
y = (float) pageBase.getSize().getHeight()/ 2;
pageBase.getCanvas().drawImage(PdfImage.fromImage(image), new Point2D.Float(x, y));
}
//保存PDF文档
pdf.saveToFile("Result.pdf");
}
//定义GetImage方法,根据PDF页数分割印章图片
static BufferedImage[] GetImage(int num) throws IOException {
String originalImg = "seal.png";
BufferedImage image = ImageIO.read(new File(originalImg));
int rows = 1;
int cols = num;
int chunks = rows * cols;
int chunkWidth = image.getWidth() / cols;
int chunkHeight = image.getHeight() / rows;
int count = 0;
BufferedImage[] imgs = new BufferedImage[ chunks ];
for (int x = 0; x < rows; x++) {
for (int y = 0; y < cols; y++) {
imgs[ count ] = new BufferedImage(chunkWidth, chunkHeight, image.getType());
Graphics2D gr = imgs[ count++ ].createGraphics();
gr.drawImage(image, 0, 0, chunkWidth, chunkHeight,
chunkWidth * y, chunkHeight * x,
chunkWidth * y + chunkWidth, chunkHeight * x + chunkHeight, Color.WHITE,null);
gr.dispose();
}
}
return imgs;
}
}
骑缝章添加效果:
(文本完)
标签:图片 根据 The int dispose original draw type ali
原文地址:https://blog.51cto.com/eiceblue/2516541