Java中生成指定字体的印章

1.引入字体

2.Windows环境下

如果在Windows上安装JAVA环境时，没有安装单独的jre1.8.0_141的话。那么字体就只放到\jdk1.8.0_141\jre\lib\fonts目前下。

3. Linux环境下

cat /etc/profile

找到上方的JAVA_HOME路径
[root@iZ2zeddfx87fxxx4m4dlxu8dZ fonts]# pwd #进入以下目录下
/home/jdk/jdk1.8.0_181/jre/lib/fonts
[root@iZ2zeddfx87fxxx4m4dlxu8dZ fonts]# mkdir fallback #创建一个空目录，用于放置外部字体

然后执行
[root@iZ2zeddfx87fw4m4dlxu8dZ fallback]# mkfontscale #不知道不执行是否可以
[root@iZ2zeddfx87fw4m4dlxu8dZ fallback]# mkfontdir #这个必须执行

这样就在fallback目录下多出了两个文件。注意不执行上方的mkfontscale和mkfontdir。即使把字体放到了指定的fonts目录下了。在CentOS下使用字体也会找不到的。会使用其他默认字体代替。这一点和Window上的不同。
我们可以通过比较两者fonts目录下的文件可以发现。

生成印章

Seal类代码：

package cn.com.yuanquanyun.bjca_scan;import lombok.Builder;
import lombok.Getter;
import org.springframework.util.ResourceUtils;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;@Getter
@Builder
public class Seal {// 起始位置private static final int INIT_BEGIN = 5;// 尺寸private Integer size;// 颜色private Color color;// 主字private SealFont mainFont;// 副字private SealFont viceFont;// 抬头private SealFont titleFont;// 中心字private SealFont centerFont;// 边线圆private SealCircle borderCircle;// 内边线圆private SealCircle borderInnerCircle;// 内线圆private SealCircle innerCircle;// 边线框private Integer borderSquare;// 加字private String stamp;/*** 画公章*/public byte[] draw(String imgFmt) throws Exception {if (borderSquare != null) {return draw2(imgFmt); // 画私章}//1.画布BufferedImage bi = new BufferedImage(size, size, BufferedImage.TYPE_4BYTE_ABGR);//2.画笔Graphics2D g2d = bi.createGraphics();//2.1抗锯齿设置//文本不抗锯齿，否则圆中心的文字会被拉长RenderingHints hints = new RenderingHints(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);//其他图形抗锯齿hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHints(hints);//2.2设置背景透明度g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0));//2.3填充矩形g2d.fillRect(0, 0, size, size);//2.4重设透明度，开始画图g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1));//2.5设置画笔颜色g2d.setPaint(color == null ? Color.RED : color);//3.画边线圆if (borderCircle != null) {drawCircle(g2d, borderCircle, INIT_BEGIN, INIT_BEGIN);} else {throw new Exception("BorderCircle can not null！");}int borderCircleWidth = borderCircle.getWidth();int borderCircleHeight = borderCircle.getHeight();//4.画内边线圆if (borderInnerCircle != null) {int x = INIT_BEGIN + borderCircleWidth - borderInnerCircle.getWidth();int y = INIT_BEGIN + borderCircleHeight - borderInnerCircle.getHeight();drawCircle(g2d, borderInnerCircle, x, y);}//5.画内环线圆if (innerCircle != null) {int x = INIT_BEGIN + borderCircleWidth - innerCircle.getWidth();int y = INIT_BEGIN + borderCircleHeight - innerCircle.getHeight();drawCircle(g2d, innerCircle, x, y);}//6.画弧形主文字if (borderCircleHeight != borderCircleWidth) {drawArcFont4Oval(g2d, borderCircle, mainFont, true);} else {drawArcFont4Circle(g2d, borderCircleHeight, mainFont, true);}//7.画弧形副文字if (borderCircleHeight != borderCircleWidth) {drawArcFont4Oval(g2d, borderCircle, viceFont, false);} else {drawArcFont4Circle(g2d, borderCircleHeight, viceFont, false);}//8.画中心字drawFont(g2d, (borderCircleWidth + INIT_BEGIN) * 2, (borderCircleHeight + INIT_BEGIN) * 2, centerFont);//9.画抬头文字drawFont(g2d, (borderCircleWidth + INIT_BEGIN) * 2, (borderCircleHeight + INIT_BEGIN) * 2, titleFont);g2d.dispose();//ByteArrayOutputStream outputStream = new ByteArrayOutputStream();boolean png = ImageIO.write(bi, imgFmt, outputStream);byte[] imgBytes = outputStream.toByteArray();outputStream.flush();outputStream.close();return imgBytes;}public byte[] draw(String pngPath,String imgFmt) throws Exception {//如果只是生成印章字节数组，不进行输出的话，传入的pngPath，无用byte[] imgBytes = draw(imgFmt);return imgBytes;
//        FileOutputStream fileOutputStream = new FileOutputStream(new File(pngPath));
//        fileOutputStream.write(imgBytes);}/*** 绘制圆弧形文字*/private static void drawArcFont4Circle(Graphics2D g2d, int circleRadius, SealFont font, boolean isTop) throws IOException, FontFormatException {if (font == null) {return;}//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = font.getSize() == null ? (55 - textLen * 2) : font.getSize();//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体//      Font f = new Font(font.getFamily(), style, size);//默认从JRE中的fonts目录下读取//File file = new File("config/font/gzkzzt.ttf");//如果如CSDN上方描述的那样已经把字体放到jre下了。这里就不用写死指定了
//        System.out.println("已读取字体文件");Font f = Font.createFont(Font.TRUETYPE_FONT, file);f = f.deriveFont(style,size);FontRenderContext context = g2d.getFontRenderContext();Rectangle2D rectangle = f.getStringBounds(font.getText(), context);//5.文字之间间距，默认动态调整double space;if (font.getSpace() != null) {space = font.getSpace();} else {if (textLen == 1) {space = 0;} else {space = rectangle.getWidth() / (textLen - 1) * 0.9;}}//6.距离外圈距离int margin = font.getMargin() == null ? INIT_BEGIN : font.getMargin();//7.写字double newRadius = circleRadius + rectangle.getY() - margin;double radianPerInterval = 2 * Math.asin(space / (2 * newRadius));double fix = 0.04;if (isTop) {fix = 0.18;}double firstAngle;if (!isTop) {if (textLen % 2 == 1) {firstAngle = Math.PI + Math.PI / 2 - (textLen - 1) * radianPerInterval / 2.0 - fix;} else {firstAngle = Math.PI + Math.PI / 2 - ((textLen / 2.0 - 0.5) * radianPerInterval) - fix;}} else {if (textLen % 2 == 1) {firstAngle = (textLen - 1) * radianPerInterval / 2.0 + Math.PI / 2 + fix;} else {firstAngle = (textLen / 2.0 - 0.5) * radianPerInterval + Math.PI / 2 + fix;}}for (int i = 0; i < textLen; i++) {double theta;double thetaX;double thetaY;if (!isTop) {theta = firstAngle + i * radianPerInterval;thetaX = newRadius * Math.sin(Math.PI / 2 - theta);thetaY = newRadius * Math.cos(theta - Math.PI / 2);} else {theta = firstAngle - i * radianPerInterval;thetaX = newRadius * Math.sin(Math.PI / 2 - theta);thetaY = newRadius * Math.cos(theta - Math.PI / 2);}AffineTransform transform;if (!isTop) {transform = AffineTransform.getRotateInstance(Math.PI + Math.PI / 2 - theta);} else {transform = AffineTransform.getRotateInstance(Math.PI / 2 - theta + Math.toRadians(8));}Font f2 = f.deriveFont(transform);g2d.setFont(f2);g2d.drawString(font.getText().substring(i, i + 1), (float) (circleRadius + thetaX + INIT_BEGIN), (float) (circleRadius - thetaY + INIT_BEGIN));}}/*** 绘制椭圆弧形文字*/private static void drawArcFont4Oval(Graphics2D g2d, SealCircle sealCircle, SealFont font, boolean isTop) {if (font == null) {return;}float radiusX = sealCircle.getWidth();float radiusY = sealCircle.getHeight();float radiusWidth = radiusX + sealCircle.getLine();float radiusHeight = radiusY + sealCircle.getLine();//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = font.getSize() == null ? 25 + (10 - textLen) / 2 : font.getSize();//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体Font f = new Font(font.getFamily(), style, size);//5.总的角跨度double totalArcAng = font.getSpace() * textLen;//6.从边线向中心的移动因子float minRat = 0.90f;double startAngle = isTop ? -90f - totalArcAng / 2f : 90f - totalArcAng / 2f;double step = 0.5;int alCount = (int) Math.ceil(totalArcAng / step) + 1;double[] angleArr = new double[alCount];double[] arcLenArr = new double[alCount];int num = 0;double accArcLen = 0.0;angleArr[num] = startAngle;arcLenArr[num] = accArcLen;num++;double angR = startAngle * Math.PI / 180.0;double lastX = radiusX * Math.cos(angR) + radiusWidth;double lastY = radiusY * Math.sin(angR) + radiusHeight;for (double i = startAngle + step; num < alCount; i += step) {angR = i * Math.PI / 180.0;double x = radiusX * Math.cos(angR) + radiusWidth, y = radiusY * Math.sin(angR) + radiusHeight;accArcLen += Math.sqrt((lastX - x) * (lastX - x) + (lastY - y) * (lastY - y));angleArr[num] = i;arcLenArr[num] = accArcLen;lastX = x;lastY = y;num++;}double arcPer = accArcLen / textLen;for (int i = 0; i < textLen; i++) {double arcL = i * arcPer + arcPer / 2.0;double ang = 0.0;for (int p = 0; p < arcLenArr.length - 1; p++) {if (arcLenArr[p] <= arcL && arcL <= arcLenArr[p + 1]) {ang = (arcL >= ((arcLenArr[p] + arcLenArr[p + 1]) / 2.0)) ? angleArr[p + 1] : angleArr[p];break;}}angR = (ang * Math.PI / 180f);Float x = radiusX * (float) Math.cos(angR) + radiusWidth;Float y = radiusY * (float) Math.sin(angR) + radiusHeight;double qxang = Math.atan2(radiusY * Math.cos(angR), -radiusX * Math.sin(angR));double fxang = qxang + Math.PI / 2.0;int subIndex = isTop ? i : textLen - 1 - i;String c = font.getText().substring(subIndex, subIndex + 1);//获取文字高宽FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(f);int w = fm.stringWidth(c), h = fm.getHeight();if (isTop) {x += h * minRat * (float) Math.cos(fxang);y += h * minRat * (float) Math.sin(fxang);x += -w / 2f * (float) Math.cos(qxang);y += -w / 2f * (float) Math.sin(qxang);} else {x += (h * minRat) * (float) Math.cos(fxang);y += (h * minRat) * (float) Math.sin(fxang);x += w / 2f * (float) Math.cos(qxang);y += w / 2f * (float) Math.sin(qxang);}// 旋转AffineTransform affineTransform = new AffineTransform();affineTransform.scale(0.8, 1);if (isTop)affineTransform.rotate(Math.toRadians((fxang * 180.0 / Math.PI - 90)), 0, 0);elseaffineTransform.rotate(Math.toRadians((fxang * 180.0 / Math.PI + 180 - 90)), 0, 0);Font f2 = f.deriveFont(affineTransform);g2d.setFont(f2);g2d.drawString(c, x.intValue() + INIT_BEGIN, y.intValue() + INIT_BEGIN);}}/*** 画文字*/private static void drawFont(Graphics2D g2d, int circleWidth, int circleHeight, SealFont font) {if (font == null) {return;}//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = font.getSize() == null ? (55 - textLen * 2) : font.getSize();//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体Font f = new Font(font.getFamily(), style, size);g2d.setFont(f);FontRenderContext context = g2d.getFontRenderContext();String[] fontTexts = font.getText().split("\n");if (fontTexts.length > 1) {int y = 0;for (String fontText : fontTexts) {y += Math.abs(f.getStringBounds(fontText, context).getHeight());}//5.设置上边距float margin = INIT_BEGIN + (float) (circleHeight / 2 - y / 2);for (String fontText : fontTexts) {Rectangle2D rectangle2D = f.getStringBounds(fontText, context);g2d.drawString(fontText, (float) (circleWidth / 2 - rectangle2D.getCenterX()), margin);margin += Math.abs(rectangle2D.getHeight());}} else {Rectangle2D rectangle2D = f.getStringBounds(font.getText(), context);//5.设置上边距，默认在中心float margin = font.getMargin() == null ?(float) (circleHeight / 2 - rectangle2D.getCenterY()) :(float) (circleHeight / 2 - rectangle2D.getCenterY()) + (float) font.getMargin();g2d.drawString(font.getText(), (float) (circleWidth / 2 - rectangle2D.getCenterX()), margin);}}/*** 画圆*/private static void drawCircle(Graphics2D g2d, SealCircle circle, int x, int y) {if (circle == null) {return;}//1.圆线条粗细默认是圆直径的1/35int lineSize = circle.getLine() == null ? circle.getHeight() * 2 / (35) : circle.getLine();//2.画圆g2d.setStroke(new BasicStroke(lineSize));g2d.drawOval(x, y, circle.getWidth() * 2, circle.getHeight() * 2);}/*** 画私章*/public byte[] draw2(String imgFmt) throws Exception {if (mainFont == null || mainFont.getText().length() < 2 || mainFont.getText().length() > 4) {throw new IllegalArgumentException("请输入2-4个字");}int fixH = 18;int fixW = 2;//1.画布BufferedImage bi = new BufferedImage(size, size / 2, BufferedImage.TYPE_4BYTE_ABGR);//2.画笔Graphics2D g2d = bi.createGraphics();//2.1设置画笔颜色g2d.setPaint(Color.RED);//2.2抗锯齿设置g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);//3.写签名int marginW = fixW + borderSquare;float marginH;FontRenderContext context = g2d.getFontRenderContext();Rectangle2D rectangle;Font f;if (mainFont.getText().length() == 2) {if (stamp != null && stamp.trim().length() > 0) {bi = drawThreeFont(bi, g2d, mainFont.append(stamp), borderSquare, size, fixH, fixW, true);} else {f = new Font(mainFont.getFamily(), Font.BOLD, mainFont.getSize());g2d.setFont(f);rectangle = f.getStringBounds(mainFont.getText().substring(0, 1), context);marginH = (float) (Math.abs(rectangle.getCenterY()) * 2 + marginW) + fixH - 4;g2d.drawString(mainFont.getText().substring(0, 1), marginW, marginH);marginW += Math.abs(rectangle.getCenterX()) * 2 + (mainFont.getSpace() == null ? INIT_BEGIN : mainFont.getSpace());g2d.drawString(mainFont.getText().substring(1), marginW, marginH);//拉伸BufferedImage nbi = new BufferedImage(size, size, bi.getType());Graphics2D ng2d = nbi.createGraphics();ng2d.setPaint(Color.RED);ng2d.drawImage(bi, 0, 0, size, size, null);//画正方形ng2d.setStroke(new BasicStroke(borderSquare));ng2d.drawRect(0, 0, size, size);ng2d.dispose();bi = nbi;}} else if (mainFont.getText().length() == 3) {if (stamp != null && stamp.trim().length() > 0) {bi = drawFourFont(bi, mainFont.append(stamp), borderSquare, size, fixH, fixW);} else {bi = drawThreeFont(bi, g2d, mainFont, borderSquare, size, fixH, fixW, false);}} else {bi = drawFourFont(bi, mainFont, borderSquare, size, fixH, fixW);}g2d.dispose();ByteArrayOutputStream outputStream = new ByteArrayOutputStream();boolean png = ImageIO.write(bi,imgFmt, outputStream);byte[] imgBytes = outputStream.toByteArray();outputStream.flush();outputStream.close();return imgBytes;}/*** 画三字*/private static BufferedImage drawThreeFont(BufferedImage bi, Graphics2D g2d, SealFont font, int lineSize, int imageSize, int fixH, int fixW, boolean isWithYin) {fixH -= 9;int marginW = fixW + lineSize;//设置字体Font f = new Font(font.getFamily(), Font.BOLD, font.getSize());g2d.setFont(f);FontRenderContext context = g2d.getFontRenderContext();Rectangle2D rectangle = f.getStringBounds(font.getText().substring(0, 1), context);float marginH = (float) (Math.abs(rectangle.getCenterY()) * 2 + marginW) + fixH;int oldW = marginW;if (isWithYin) {g2d.drawString(font.getText().substring(2, 3), marginW, marginH);marginW += rectangle.getCenterX() * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());} else {marginW += rectangle.getCenterX() * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());g2d.drawString(font.getText().substring(0, 1), marginW, marginH);}//拉伸BufferedImage nbi = new BufferedImage(imageSize, imageSize, bi.getType());Graphics2D ng2d = nbi.createGraphics();ng2d.setPaint(Color.RED);ng2d.drawImage(bi, 0, 0, imageSize, imageSize, null);//画正方形ng2d.setStroke(new BasicStroke(lineSize));ng2d.drawRect(0, 0, imageSize, imageSize);ng2d.dispose();bi = nbi;g2d = bi.createGraphics();g2d.setPaint(Color.RED);g2d.setFont(f);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);if (isWithYin) {g2d.drawString(font.getText().substring(0, 1), marginW, marginH += fixH);rectangle = f.getStringBounds(font.getText(), context);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(1), marginW, marginH);} else {g2d.drawString(font.getText().substring(1, 2), oldW, marginH += fixH);rectangle = f.getStringBounds(font.getText(), context);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(2, 3), oldW, marginH);}return bi;}/*** 画四字*/private static BufferedImage drawFourFont(BufferedImage bi, SealFont font, int lineSize, int imageSize, int fixH, int fixW) throws IOException, FontFormatException {int marginW = fixW + lineSize;//拉伸BufferedImage nbi = new BufferedImage(imageSize, imageSize, bi.getType());Graphics2D ng2d = nbi.createGraphics();ng2d.setPaint(Color.RED);ng2d.drawImage(bi, 0, 0, imageSize, imageSize, null);//画正方形ng2d.setStroke(new BasicStroke(lineSize));ng2d.drawRect(0, 0, imageSize, imageSize);ng2d.dispose();bi = nbi;Graphics2D g2d = bi.createGraphics();g2d.setPaint(Color.RED);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);FontRenderContext context = g2d.getFontRenderContext();//Font f = new Font(font.getFamily(), Font.BOLD, font.getSize());//默认读取JDK 下的font字体File file = new File("config/font/simsun.ttf");System.out.println("已读取字体文件");Font f = Font.createFont(Font.TRUETYPE_FONT, file);f = f.deriveFont(Font.BOLD, font.getSize());g2d.setFont(f);Rectangle2D rectangle = f.getStringBounds(font.getText().substring(0, 1), context);float marginH = (float) (Math.abs(rectangle.getCenterY()) * 2 + marginW) + fixH;g2d.drawString(font.getText().substring(2, 3), marginW, marginH);int oldW = marginW;marginW += Math.abs(rectangle.getCenterX()) * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());g2d.drawString(font.getText().substring(0, 1), marginW, marginH);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(3, 4), oldW, marginH);g2d.drawString(font.getText().substring(1, 2), marginW, marginH);return bi;}public Integer getSize() {return size;}public void setSize(Integer size) {this.size = size;}public Color getColor() {return color;}public void setColor(Color color) {this.color = color;}public SealFont getMainFont() {return mainFont;}public void setMainFont(SealFont mainFont) {this.mainFont = mainFont;}public SealFont getViceFont() {return viceFont;}public void setViceFont(SealFont viceFont) {this.viceFont = viceFont;}public SealFont getTitleFont() {return titleFont;}public void setTitleFont(SealFont titleFont) {this.titleFont = titleFont;}public SealFont getCenterFont() {return centerFont;}public void setCenterFont(SealFont centerFont) {this.centerFont = centerFont;}public SealCircle getBorderCircle() {return borderCircle;}public void setBorderCircle(SealCircle borderCircle) {this.borderCircle = borderCircle;}public SealCircle getBorderInnerCircle() {return borderInnerCircle;}public void setBorderInnerCircle(SealCircle borderInnerCircle) {this.borderInnerCircle = borderInnerCircle;}public SealCircle getInnerCircle() {return innerCircle;}public void setInnerCircle(SealCircle innerCircle) {this.innerCircle = innerCircle;}public Integer getBorderSquare() {return borderSquare;}public void setBorderSquare(Integer borderSquare) {this.borderSquare = borderSquare;}public String getStamp() {return stamp;}public void setStamp(String stamp) {this.stamp = stamp;}
}

SealCircle类：

package cn.com.yuanquanyun.bjca_scan;import lombok.Builder;
import lombok.Getter;
@Getter
@Builder
public class SealCircle {private Integer line;private Integer width;private Integer height;public Integer getLine() {return line;}public void setLine(Integer line) {this.line = line;}public Integer getWidth() {return width;}public void setWidth(Integer width) {this.width = width;}public Integer getHeight() {return height;}public void setHeight(Integer height) {this.height = height;}
}

SealFont类：

package cn.com.yuanquanyun.bjca_scan;import lombok.Builder;
import lombok.Getter;@Getter
@Builder
public class SealFont {private String text;private String family;private Integer size;private Boolean bold;private Double space;private Integer margin;public String getText() {return text;}public void setText(String text) {this.text = text;}public void setFamily(String family) {this.family = family;}public Integer getSize() {return size;}public void setSize(Integer size) {this.size = size;}public void setBold(Boolean bold) {this.bold = bold;}public Double getSpace() {return space;}public void setSpace(Double space) {this.space = space;}public Integer getMargin() {return margin;}public void setMargin(Integer margin) {this.margin = margin;}public String getFamily() {return family == null ? "宋体" : family;}public boolean getBold() {return bold == null ? true : bold;}public SealFont append(String text) {this.text += text;return this;}}

和印章生成相关的主要是以上这三个类。

测试类

public static void myTestCompanySeal() throws Exception {String mainText = "北京某某科技有限公司";String titleText = "合同专用章";String viceText = "0192834567";String keZhang = "公章刻章字体";//它会根据字体名称 去 jre下的font里去找这个字体。没有的话，会用默认字体。可以灵活控制Font的字体。上方的 Seal类中，采用的是读取本地的字体文件。而不是去jre 下的font里去找。两种方式都可以。String songTi = "宋体";//同上// 使用工具生成印章图片try {Seal.SealBuilder builder = Seal.builder();builder.size(432);builder.borderCircle(SealCircle.builder().line(10).width(210).height(210).build());if (mainText != null) {// 根据主文字长度，设置字体大小及边距int length = mainText.length();int size = 70;double space = 50;if (length > 0 && length <= 8) {space = 70;} else if (length == 9) {space = 60;} else if (length == 10) {space = 55;} else if (length == 11) {space = 50;} else if (length == 12) {space = 45;} else if (length == 13) {space = 40;} else if (length == 14) {space = 40;} else if (length == 15) {space = 37;} else if (length == 16) {size = 65;space = 35;} else if (length == 17) {size = 65;space = 35;} else if (length == 18) {size = 63;space = 33;} else if (length == 19) {size = 61;space = 31;} else if (length == 20) {size = 60;space = 30;} else if (length == 21) {size = 58;space = 29;} else if (length == 22) {size = 56;space = 28;} else if (length == 23) {size = 54;space = 27;} else if (length == 24) {size = 54;space = 27;} else if (length == 25) {size = 52;space = 26;} else {size = 60 - (length - 20) * 2;space = 30 - (length - 20) * 0.5;}builder.mainFont(SealFont.builder().text(mainText).family(keZhang).size(size).space(space).margin(10).build());}//builder.centerFont(SealFont.builder().family(songTi).text("★").size(140).build());//if (titleText != null) {builder.titleFont(SealFont.builder().family(keZhang).text(titleText).size(50).space(0.0).margin(100).build());}// 副文字 数字编号if (viceText != null) {builder.viceFont(SealFont.builder().family(songTi).text(viceText).size(30).space(20.0).margin(-10).build());}//Seal build = builder.build();byte[] draw = build.draw("png");FileUtil.writeBytes(draw, "C:\\Users\\Administrator\\Desktop\\seal.jpg");} catch (Exception e) {throw new CustomException("生成印章失败");}}
public static void main(String[] args) throws Exception {
//        myTestCompanySeal();//生成企业圆章// String legalName="王大拿";//三个字String legalName="王大拿印";//四个字String imgFmt = "png";String fontType = "宋体";makeLegalSeal(legalName,imgFmt,fontType);//生成个人私章}

效果：如下

测试私人印章类：

    private static byte[] makeLegalSeal(String legalName,String imgFmt,String fontType) throws Exception {// 加载刻章字体
//        String keZhang = "公章刻章字体";//这里的名字是字体名字，可以通过双击STXINGKA.ttf文件可以看到第一行的 字体名称: 公章刻章字体  华文行楷String keZhang = fontType;//这里的名字是字体名字，可以通过双击STXINGKA.ttf文件可以看到第一行的 字体名称: 公章刻章字体  华文行楷 "Lucida Bright"byte[] draw =Seal.builder().size(300).borderSquare(16).mainFont(SealFont.builder().text(legalName).family(keZhang).size(120).build()).build().draw(imgFmt);FileUtil.writeBytes(draw, "C:\\Users\\Administrator\\Desktop\\privateSeal.jpg");return draw;}

绘制方章

SquareSeal类：

package cn.com.yuanquanyun.utils.seal;import cn.hutool.core.io.IoUtil;
import lombok.Builder;
import lombok.Getter;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;@Builder
@Getter
public class SquareSeal {// 起始位置private static final int INIT_BEGIN = 5;// 尺寸private Integer size;// 颜色private Color color;// 主字private SealFont mainFont;// 副字private SealFont viceFont;// 抬头private SealFont titleFont;// 中心字private SealFont centerFont;// 边线圆private SealCircle borderCircle;// 内边线圆private SealCircle borderInnerCircle;// 内线圆private SealCircle innerCircle;// 边线框private Integer borderSquare;// 加字private String stamp;/*** 画公章*/public byte[] draw() throws Exception {if (borderSquare != null) {return draw2(); // 画私章}//1.画布BufferedImage bi = new BufferedImage(size, size, BufferedImage.TYPE_4BYTE_ABGR);//2.画笔Graphics2D g2d = bi.createGraphics();//2.1抗锯齿设置//文本不抗锯齿，否则圆中心的文字会被拉长RenderingHints hints = new RenderingHints(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);//其他图形抗锯齿hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHints(hints);//2.2设置背景透明度g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0));//2.3填充矩形g2d.fillRect(0, 0, size, size);//2.4重设透明度，开始画图g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1));//2.5设置画笔颜色g2d.setPaint(color == null ? Color.RED : color);//3.画边线圆if (borderCircle != null) {drawCircle(g2d, borderCircle, INIT_BEGIN, INIT_BEGIN);} else {throw new Exception("BorderCircle can not null！");}int borderCircleWidth = borderCircle.getWidth();int borderCircleHeight = borderCircle.getHeight();//4.画内边线圆if (borderInnerCircle != null) {int x = INIT_BEGIN + borderCircleWidth - borderInnerCircle.getWidth();int y = INIT_BEGIN + borderCircleHeight - borderInnerCircle.getHeight();drawCircle(g2d, borderInnerCircle, x, y);}//5.画内环线圆if (innerCircle != null) {int x = INIT_BEGIN + borderCircleWidth - innerCircle.getWidth();int y = INIT_BEGIN + borderCircleHeight - innerCircle.getHeight();drawCircle(g2d, innerCircle, x, y);}//6.画弧形主文字if (borderCircleHeight != borderCircleWidth) {drawArcFont4Oval(g2d, borderCircle, mainFont, true);} else {drawArcFont4Circle(g2d, borderCircleHeight, mainFont, true);}//7.画弧形副文字if (borderCircleHeight != borderCircleWidth) {drawArcFont4Oval(g2d, borderCircle, viceFont, false);} else {drawArcFont4Circle(g2d, borderCircleHeight, viceFont, false);}//8.画中心字drawFont(g2d, (borderCircleWidth + INIT_BEGIN) * 2, (borderCircleHeight + INIT_BEGIN) * 2, centerFont);//9.画抬头文字drawFont(g2d, (borderCircleWidth + INIT_BEGIN) * 2, (borderCircleHeight + INIT_BEGIN) * 2, titleFont);g2d.dispose();//ByteArrayOutputStream outputStream = new ByteArrayOutputStream();boolean png = ImageIO.write(bi, "PNG", outputStream);byte[] imgBytes = outputStream.toByteArray();outputStream.flush();outputStream.close();return imgBytes;}public void draw(String pngPath) throws Exception {byte[] imgBytes = draw();FileOutputStream fileOutputStream = new FileOutputStream(new File(pngPath));fileOutputStream.write(imgBytes);IoUtil.close(fileOutputStream);}/*** 绘制圆弧形文字*/private static void drawArcFont4Circle(Graphics2D g2d, int circleRadius, SealFont font, boolean isTop) {if (font == null) {return;}//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = font.getSize() == null ? (55 - textLen * 2) : font.getSize();//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体Font f = new Font(font.getFamily(), style, size);FontRenderContext context = g2d.getFontRenderContext();Rectangle2D rectangle = f.getStringBounds(font.getText(), context);//5.文字之间间距，默认动态调整double space;if (font.getSpace() != null) {space = font.getSpace();} else {if (textLen == 1) {space = 0;} else {space = rectangle.getWidth() / (textLen - 1) * 0.9;}}//6.距离外圈距离int margin = font.getMargin() == null ? INIT_BEGIN : font.getMargin();//7.写字double newRadius = circleRadius + rectangle.getY() - margin;double radianPerInterval = 2 * Math.asin(space / (2 * newRadius));double fix = 0.04;if (isTop) {fix = 0.18;}double firstAngle;if (!isTop) {if (textLen % 2 == 1) {firstAngle = Math.PI + Math.PI / 2 - (textLen - 1) * radianPerInterval / 2.0 - fix;} else {firstAngle = Math.PI + Math.PI / 2 - ((textLen / 2.0 - 0.5) * radianPerInterval) - fix;}} else {if (textLen % 2 == 1) {firstAngle = (textLen - 1) * radianPerInterval / 2.0 + Math.PI / 2 + fix;} else {firstAngle = (textLen / 2.0 - 0.5) * radianPerInterval + Math.PI / 2 + fix;}}for (int i = 0; i < textLen; i++) {double theta;double thetaX;double thetaY;if (!isTop) {theta = firstAngle + i * radianPerInterval;thetaX = newRadius * Math.sin(Math.PI / 2 - theta);thetaY = newRadius * Math.cos(theta - Math.PI / 2);} else {theta = firstAngle - i * radianPerInterval;thetaX = newRadius * Math.sin(Math.PI / 2 - theta);thetaY = newRadius * Math.cos(theta - Math.PI / 2);}AffineTransform transform;if (!isTop) {transform = AffineTransform.getRotateInstance(Math.PI + Math.PI / 2 - theta);} else {transform = AffineTransform.getRotateInstance(Math.PI / 2 - theta + Math.toRadians(8));}Font f2 = f.deriveFont(transform);g2d.setFont(f2);g2d.drawString(font.getText().substring(i, i + 1), (float) (circleRadius + thetaX + INIT_BEGIN), (float) (circleRadius - thetaY + INIT_BEGIN));}}/*** 绘制椭圆弧形文字*/private static void drawArcFont4Oval(Graphics2D g2d, SealCircle sealCircle, SealFont font, boolean isTop) {if (font == null) {return;}float radiusX = sealCircle.getWidth();float radiusY = sealCircle.getHeight();float radiusWidth = radiusX + sealCircle.getLine();float radiusHeight = radiusY + sealCircle.getLine();//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = font.getSize() == null ? 25 + (10 - textLen) / 2 : font.getSize();//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体Font f = new Font(font.getFamily(), style, size);//5.总的角跨度double totalArcAng = font.getSpace() * textLen;//6.从边线向中心的移动因子float minRat = 0.90f;double startAngle = isTop ? -90f - totalArcAng / 2f : 90f - totalArcAng / 2f;double step = 0.5;int alCount = (int) Math.ceil(totalArcAng / step) + 1;double[] angleArr = new double[alCount];double[] arcLenArr = new double[alCount];int num = 0;double accArcLen = 0.0;angleArr[num] = startAngle;arcLenArr[num] = accArcLen;num++;double angR = startAngle * Math.PI / 180.0;double lastX = radiusX * Math.cos(angR) + radiusWidth;double lastY = radiusY * Math.sin(angR) + radiusHeight;for (double i = startAngle + step; num < alCount; i += step) {angR = i * Math.PI / 180.0;double x = radiusX * Math.cos(angR) + radiusWidth, y = radiusY * Math.sin(angR) + radiusHeight;accArcLen += Math.sqrt((lastX - x) * (lastX - x) + (lastY - y) * (lastY - y));angleArr[num] = i;arcLenArr[num] = accArcLen;lastX = x;lastY = y;num++;}double arcPer = accArcLen / textLen;for (int i = 0; i < textLen; i++) {double arcL = i * arcPer + arcPer / 2.0;double ang = 0.0;for (int p = 0; p < arcLenArr.length - 1; p++) {if (arcLenArr[p] <= arcL && arcL <= arcLenArr[p + 1]) {ang = (arcL >= ((arcLenArr[p] + arcLenArr[p + 1]) / 2.0)) ? angleArr[p + 1] : angleArr[p];break;}}angR = (ang * Math.PI / 180f);Float x = radiusX * (float) Math.cos(angR) + radiusWidth;Float y = radiusY * (float) Math.sin(angR) + radiusHeight;double qxang = Math.atan2(radiusY * Math.cos(angR), -radiusX * Math.sin(angR));double fxang = qxang + Math.PI / 2.0;int subIndex = isTop ? i : textLen - 1 - i;String c = font.getText().substring(subIndex, subIndex + 1);//获取文字高宽FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(f);int w = fm.stringWidth(c), h = fm.getHeight();if (isTop) {x += h * minRat * (float) Math.cos(fxang);y += h * minRat * (float) Math.sin(fxang);x += -w / 2f * (float) Math.cos(qxang);y += -w / 2f * (float) Math.sin(qxang);} else {x += (h * minRat) * (float) Math.cos(fxang);y += (h * minRat) * (float) Math.sin(fxang);x += w / 2f * (float) Math.cos(qxang);y += w / 2f * (float) Math.sin(qxang);}// 旋转AffineTransform affineTransform = new AffineTransform();affineTransform.scale(0.8, 1);if (isTop)affineTransform.rotate(Math.toRadians((fxang * 180.0 / Math.PI - 90)), 0, 0);elseaffineTransform.rotate(Math.toRadians((fxang * 180.0 / Math.PI + 180 - 90)), 0, 0);Font f2 = f.deriveFont(affineTransform);g2d.setFont(f2);g2d.drawString(c, x.intValue() + INIT_BEGIN, y.intValue() + INIT_BEGIN);}}/*** 画文字*/private static void drawFont(Graphics2D g2d, int circleWidth, int circleHeight, SealFont font) {if (font == null) {return;}//1.字体长度int textLen = font.getText().length();//2.字体大小，默认根据字体长度动态设定int size = 18;if (font.getSize() != null){size = font.getSize();}else {if (textLen > 13){size = 18 - (textLen - 13) < 12 ? 12 : 18 - (textLen - 13);}}//3.字体样式int style = font.getBold() ? Font.BOLD : Font.PLAIN;//4.构造字体Font f = new Font(font.getFamily(), style, size);g2d.setFont(f);FontRenderContext context = g2d.getFontRenderContext();String[] fontTexts = font.getText().split("\n");if (fontTexts.length > 1) {//当文字是多行时的处理方式int y = 0;for (String fontText : fontTexts) {y += Math.abs(f.getStringBounds(fontText, context).getHeight());}//5.设置上边距float margin = INIT_BEGIN*5 + (float) (circleHeight / 2 - y / 2);
//            System.out.println("1.margin==="+margin);for (String fontText : fontTexts) {Rectangle2D rectangle2D = f.getStringBounds(fontText, context);g2d.drawString(fontText, (float) (circleWidth / 2 - rectangle2D.getCenterX()), margin);margin += Math.abs(rectangle2D.getHeight());
//                System.out.println("2.margin==="+margin);}
//            System.out.println("3.margin==="+margin);} else {//当文字是单行时的处理方式Rectangle2D rectangle2D = f.getStringBounds(font.getText(), context);//5.设置上边距，默认在中心float margin = font.getMargin() == null ?(float) (circleHeight / 2 - rectangle2D.getCenterY()) :(float) (circleHeight / 2 - rectangle2D.getCenterY()) + (float) font.getMargin();g2d.drawString(font.getText(), (float) (circleWidth / 2 - rectangle2D.getCenterX()), margin);}}/*** 画圆*/private static void drawCircle(Graphics2D g2d, SealCircle circle, int x, int y) {if (circle == null) {return;}//1.圆线条粗细默认是圆直径的1/35int lineSize = circle.getLine() == null ? circle.getHeight() * 2 / (35) : circle.getLine();//2.画圆g2d.setStroke(new BasicStroke(lineSize));g2d.drawOval(x, y, circle.getWidth() * 2, circle.getHeight() * 2);}/*** 画矩形*/private static void drawRectangle(Graphics2D g2d, SealCircle circle, int x, int y) {if (circle == null) {return;}//1.圆线条粗细默认是圆直径的1/35int lineSize = circle.getLine() == null ? circle.getHeight() * 2 / (35) : circle.getLine();//2.画矩形g2d.setStroke(new BasicStroke(lineSize));g2d.drawRect(x, y, 289, circle.getHeight() * 1);}/*** 画私章*/public byte[] draw2() throws Exception {//1.画布BufferedImage bi = new BufferedImage(size, 106, BufferedImage.TYPE_4BYTE_ABGR);//2.画笔Graphics2D g2d = bi.createGraphics();//2.1抗锯齿设置//文本不抗锯齿，否则圆中心的文字会被拉长RenderingHints hints = new RenderingHints(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);//其他图形抗锯齿hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2d.setRenderingHints(hints);//2.2设置背景透明度g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0));//2.3填充矩形g2d.fillRect(0, 0, size, size);//2.4重设透明度，开始画图g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1));//2.5设置画笔颜色g2d.setPaint(color == null ? Color.RED : color);//3.画边线圆if (borderCircle != null) {drawRectangle(g2d, borderCircle, INIT_BEGIN, INIT_BEGIN);} else {throw new Exception("BorderCircle can not null！");}//4.画上行文字drawFont(g2d, INIT_BEGIN * 60, INIT_BEGIN * 5, mainFont);//5.画横向文字drawFont(g2d, INIT_BEGIN * 60, INIT_BEGIN * 20, viceFont);//5.画下行文字drawFont(g2d, INIT_BEGIN * 60, INIT_BEGIN * 5, titleFont);g2d.dispose();ByteArrayOutputStream outputStream = new ByteArrayOutputStream();boolean png = ImageIO.write(bi, "PNG", outputStream);byte[] imgBytes = outputStream.toByteArray();outputStream.flush();outputStream.close();return imgBytes;}/*** 画三字*/private static BufferedImage drawThreeFont(BufferedImage bi, Graphics2D g2d, SealFont font, int lineSize, int imageSize, int fixH, int fixW, boolean isWithYin) {fixH -= 9;int marginW = fixW + lineSize;//设置字体Font f = new Font(font.getFamily(), Font.BOLD, font.getSize());g2d.setFont(f);FontRenderContext context = g2d.getFontRenderContext();Rectangle2D rectangle = f.getStringBounds(font.getText().substring(0, 1), context);float marginH = (float) (Math.abs(rectangle.getCenterY()) * 2 + marginW) + fixH;int oldW = marginW;if (isWithYin) {g2d.drawString(font.getText().substring(2, 3), marginW, marginH);marginW += rectangle.getCenterX() * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());} else {marginW += rectangle.getCenterX() * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());g2d.drawString(font.getText().substring(0, 1), marginW, marginH);}//拉伸BufferedImage nbi = new BufferedImage(imageSize, imageSize, bi.getType());Graphics2D ng2d = nbi.createGraphics();ng2d.setPaint(Color.RED);ng2d.drawImage(bi, 0, 0, imageSize, imageSize, null);//画正方形ng2d.setStroke(new BasicStroke(lineSize));ng2d.drawRect(0, 0, imageSize, imageSize);ng2d.dispose();bi = nbi;g2d = bi.createGraphics();g2d.setPaint(Color.RED);g2d.setFont(f);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);if (isWithYin) {g2d.drawString(font.getText().substring(0, 1), marginW, marginH += fixH);rectangle = f.getStringBounds(font.getText(), context);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(1), marginW, marginH);} else {g2d.drawString(font.getText().substring(1, 2), oldW, marginH += fixH);rectangle = f.getStringBounds(font.getText(), context);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(2, 3), oldW, marginH);}return bi;}/*** 画四字*/private static BufferedImage drawFourFont(BufferedImage bi, SealFont font, int lineSize, int imageSize, int fixH, int fixW) {int marginW = fixW + lineSize;//拉伸BufferedImage nbi = new BufferedImage(imageSize, imageSize, bi.getType());Graphics2D ng2d = nbi.createGraphics();ng2d.setPaint(Color.RED);ng2d.drawImage(bi, 0, 0, imageSize, imageSize, null);//画正方形ng2d.setStroke(new BasicStroke(lineSize));ng2d.drawRect(0, 0, imageSize, imageSize);ng2d.dispose();bi = nbi;Graphics2D g2d = bi.createGraphics();g2d.setPaint(Color.RED);g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);FontRenderContext context = g2d.getFontRenderContext();Font f = new Font(font.getFamily(), Font.BOLD, font.getSize());g2d.setFont(f);Rectangle2D rectangle = f.getStringBounds(font.getText().substring(0, 1), context);float marginH = (float) (Math.abs(rectangle.getCenterY()) * 2 + marginW) + fixH;g2d.drawString(font.getText().substring(2, 3), marginW, marginH);int oldW = marginW;marginW += Math.abs(rectangle.getCenterX()) * 2 + (font.getSpace() == null ? INIT_BEGIN : font.getSpace());g2d.drawString(font.getText().substring(0, 1), marginW, marginH);marginH += Math.abs(rectangle.getHeight());g2d.drawString(font.getText().substring(3, 4), oldW, marginH);g2d.drawString(font.getText().substring(1, 2), marginW, marginH);return bi;}
}

测试类

/*** 创建方形企业章** @param companyName 企业名称：xxx企业* @param title       抬头：合同专用章* @param code        编号：1234567890123* @return* @throws Exception*/public static byte[] makeCompanySquareSeal (String companyName, String title, String code) throws Exception {byte[] img = null;if(companyName.length() <= 19){img = SquareSeal.builder().size(300).borderCircle(SealCircle.builder().line(4).width(95).height(95).build()).borderSquare(10).mainFont(SealFont.builder().text(companyName).space(12.0).margin(10).build()).viceFont(SealFont.builder().text(title).size(16).space(15.0).margin(0).build()).titleFont(SealFont.builder().text(code).size(12).space(9.0).margin(64).build()).color(Color.RED).build().draw();}else {//支持印章字体换行操作int len = companyName.length();companyName = companyName.substring(0,19)+"\n"+companyName.substring(19,len);img = SquareSeal.builder().size(300).borderCircle(SealCircle.builder().line(4).width(95).height(95).build()).borderSquare(10).mainFont(SealFont.builder().text(companyName).space(12.0).margin(10).build()).viceFont(SealFont.builder().text(title).size(16).space(15.0).margin(10).build())//margin 越大viceFont位置越往下，margin 为0时，位于中间位置.titleFont(SealFont.builder().text(code).size(12).space(9.0).margin(75).build()) //margin 越大titleFont位置越往下.color(Color.RED).build().draw();}return img;}public static void main(String[] args) throws Exception {byte[] bytes = makeCompanySquareSeal("中国某某某股份有限公司某某某某分公司", "招标专用章", "1234567890123");System.out.println("data:image/png;base64,"+ Base64.encode(bytes));}

主文字超过19个字，就换行。