package com.test; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics2D; import java.awt.Point; import java.awt.Polygon; import java.awt.RenderingHints; import java.awt.Stroke; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; /** * 印章类.保存印章必须的参数和绘制方法. * * @author i2534 * */ public class Seal { /** * 印章名称距中心点偏移量,按照y轴方向 */ private int nameOffset = 50; /** * 印章宽度 */ private int width = 230; /** * 印章高度 */ private int height = 230; /** * 印章中心标志(默认为五角星)外接圆半径 */ private float radius = 30; /** * 印章所属单位的起始角度,以6点钟方向为中心,向两个方向平均扩展 */ private float firmAngle = 120; /** * 印章名称 */ private String name = "支付成功"; /** * 印章名称颜色 */ private Color nameColor = Color.RED; /** * 印章所属单位 */ private String firm = "财务支付专用章"; /** * 印章所属单位颜色 */ private Color firmColor = Color.RED; /** * 印章名称字体信息 */ private Font nameFont = new Font("宋体", Font.PLAIN, 16); /** * 印章所属单位字体信息 */ private Font firmFont = new Font("宋体", Font.PLAIN, 24); /** * 单位字体的宽度缩放比率(百分比).此参数可以使字体看起来瘦长 */ private float firmScale = 1.0F; /** * 边框线宽 */ private float borderWidth = 5F; /** * 边框颜色 */ private Color borderColor = Color.RED; /** * 印章标记(默认为五角星)线宽 */ private float signBorderWidth = 3F; /** * 印章标记颜色 */ private Color signBorderColor = Color.RED; /** * 印章标记填充颜色 */ private Color signFillColor = Color.RED; public void draw(Graphics2D g2d) { // 把绘制起点挪到圆中心点 g2d.translate(width / 2, height / 2); Stroke stroke = g2d.getStroke();// 旧的线性 // 填充五角星 Polygon polygon = getPentaclePoints(radius); if (signFillColor != null) { g2d.setColor(signFillColor); g2d.fill(polygon); } // 绘制五角星边框 g2d.setStroke(new BasicStroke(signBorderWidth)); g2d.setColor(signBorderColor); g2d.draw(polygon); // 绘制印章边框 g2d.setColor(borderColor); g2d.setStroke(new BasicStroke(borderWidth)); g2d.drawOval(-width / 2, -height / 2, width, height); g2d.setStroke(stroke); // 绘制印章名称 g2d.setFont(nameFont); g2d.setColor(nameColor); FontMetrics fm = g2d.getFontMetrics(); int w = fm.stringWidth(name);// 名称宽度 int h = fm.getHeight();// 名称高度 int y = fm.getAscent() - h / 2;// 求得中心线经过字体的高度的一半时的字体的起绘点 g2d.drawString(name, -w / 2, y + nameOffset); // 绘制印章单位 g2d.setFont(firmFont); g2d.setColor(firmColor); fm = g2d.getFontMetrics(); h = fm.getHeight();// 字高度 int count = firm.length();// 字数 int r = width / 2;// 半径,就假设此印章是个矩形,方便计算 float angle = (360 - firmAngle) / (count - 1);// 字间角度 float start = 90 + firmAngle / 2;// 以x轴正向为0,顺时针旋转 double vr = Math.toRadians(90);// 垂直旋转弧度 char[] chars = firm.toCharArray(); for (int i = 0; i < count; i++) { char c = chars[i];// 需要绘制的字符 int cw = fm.charWidth(c);// 此字符宽度 float a = start + angle * i;// 现在角度 double radians = Math.toRadians(a); g2d.rotate(radians);// 旋转坐标系,让要绘制的字符处于x正轴 float x = r - h;// 绘制字符的x坐标为半径减去字高度 // g2d.drawLine(0, 0, (int) x, 0);// debug g2d.translate(x, 0);// 移动到此位置,此时字和x轴垂直 g2d.rotate(vr);// 旋转90度,让字平行于x轴 g2d.scale(firmScale, 1);// 缩放字体宽度 g2d.drawString(String.valueOf(c), -cw / 2, 0);// 此点为字的中心点 // 将所有设置还原,等待绘制下一个 g2d.scale(1 / firmScale, 1); g2d.rotate(-vr); g2d.translate(-x, 0); g2d.rotate(-radians); } g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); } /** * 获取具有指定半径外接圆的五角星顶点 * * @param radius * 圆半径 */ private Polygon getPentaclePoints(float radius) { if (radius <= 0) return null; float lradius = radius * 0.381966f;// 根据radius求内圆半径 double halfpi = Math.PI / 180f; Point[] points = new Point[10]; for (int i = 0; i < points.length; i++) { if (i % 2 == 1) points[i] = new Point( (int) (Math.sin(halfpi * 36 * i) * radius), (int) (Math.cos(halfpi * 36 * i) * radius)); else points[i] = new Point( (int) (Math.sin(halfpi * 36 * i) * lradius), (int) (Math.cos(halfpi * 36 * i) * lradius)); } Polygon polygon = new Polygon(); for (Point p : points) { polygon.addPoint(p.x, p.y); } return polygon; } /** * 导出此印章为透明背景的图片字节数组. * * @param format * 图片类型,如果为null,则默认为png * @return 数组 * @throws IOException * 写出图像数据出现问题 */ public byte[] export2pic(String format) throws IOException { int fix = 5;// 宽高修正,如果宽高就为图片宽高,可能边框线被切割 BufferedImage bi = new BufferedImage(getWidth() + fix * 2, getHeight() + fix * 2, BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = bi.createGraphics(); g2d.translate(fix, fix); this.draw(g2d); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(bi, format == null ? "png" : format, baos); return baos.toByteArray(); } public int getWidth() { return width; } public int getHeight() { return height; } public static void main(String[] args) throws IOException { Seal seal = new Seal(); BufferedImage image = new BufferedImage(seal.getWidth(), seal.getHeight(), BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = image.createGraphics(); seal.draw(g2d); ImageIO.write(image, "png", new File("E:\\财务支付章.png")); } }
印章工具
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转载自netwt109-126-com.iteye.com/blog/2225163
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