在我們編輯PDF文檔的過(guò)程中，有時(shí)候需要在文檔中添加一些如多邊形、矩形、橢圓形之類的圖形，而Free Spire PDF for Java 則正好可以幫助我們?cè)贘ava程序中通過(guò)代碼在PDF文檔中繪制形狀，以及設(shè)置形狀邊線顏色和填充色。

Jar包導(dǎo)入

方法一：下載Free Spire.PDF for Java包并解壓縮，然后將lib文件夾下的Spire.Pdf.jar包作為依賴項(xiàng)導(dǎo)入到Java應(yīng)用程序中

方法二：直接通過(guò)Maven倉(cāng)庫(kù)安裝JAR包，配置pom.xml文件的代碼如下：

<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>

Java代碼

import com.spire.pdf.*;import com.spire.pdf.graphics.*;import java.awt.*;import java.awt.geom.Rectangle2D;public class DrawShapes { public static void main(String[]args){ //創(chuàng)建PDF文檔，并添加一頁(yè) PdfDocument pdf = new PdfDocument(); PdfPageBase page = pdf.appendPage(); //創(chuàng)建畫(huà)筆、畫(huà)刷 PdfPen pen =new PdfPen(new PdfRGBColor(Color.black),0.3); PdfBrush brush= PdfBrushes.getGreenYellow(); //繪制矩形 Rectangle2D.Float rect1 = new Rectangle2D.Float(0, 20, 120, 50);//創(chuàng)建Rectangle2D對(duì)象，并指定圖形在PDF頁(yè)面中的大小、位置 PdfLinearGradientBrush linearGradientBrush = new PdfLinearGradientBrush(rect1,new PdfRGBColor(Color.pink),new PdfRGBColor(Color.YELLOW),PdfLinearGradientMode.Horizontal);//填充圖形顏色 page.getCanvas().drawRectangle(linearGradientBrush, rect1);//繪制矩形到頁(yè)面 //繪制橢圓 Point centerStart= new Point(205,45); Point centerEnd= new Point(205,45); PdfRadialGradientBrush radialGradientBrush = new PdfRadialGradientBrush(centerStart,0,centerEnd,60,new PdfRGBColor(Color.white),new PdfRGBColor(Color.cyan)); Rectangle2D.Float rect2= new Rectangle2D.Float(180, 20, 50, 50); page.getCanvas().drawEllipse(radialGradientBrush,rect2); //繪制多邊形 Point p1=new Point(290,70); Point p2=new Point(310,45); Point p3=new Point(325,60); Point p4=new Point(340,20); Point p5=new Point(370,70); Point[] points = {p1, p2, p3, p4, p5}; page.getCanvas().drawPolygon(pen,brush, points); //繪制弧形 float startAngle = 0; float sweepAngle = 270; Rectangle2D.Float rect3= new Rectangle2D.Float(0, 110, 50, 50); page.getCanvas().drawArc(pen, rect3, startAngle, sweepAngle); //繪制扇形 Rectangle2D.Float rect4= new Rectangle2D.Float(70, 110, 50, 50); page.getCanvas().drawPie(pen, rect4, startAngle, sweepAngle); //繪制兩條垂直交叉的直線 Point pStart1=new Point(205,110); Point pEnd1=new Point(205,160); page.getCanvas().drawLine(pen, pStart1, pEnd1); Point pStart2=new Point(180,135); Point pEnd2=new Point(230,135); page.getCanvas().drawLine(pen, pStart2, pEnd2); //繪制貝塞爾曲線 Point startPoint = new Point(290, 135); Point firstControlPoint = new Point(330, 70); Point secondControlPoint = new Point(330, 200); Point endPoint = new Point(370, 135); page.getCanvas().drawBezier(pen, startPoint, firstControlPoint, secondControlPoint, endPoint); //保存文檔 pdf.saveToFile('DrawShapes.pdf',FileFormat.PDF); }}

效果圖

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