JAVA生成椭圆形签章

2022-06-30 14:48:29 浏览数 (1)

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Polygon;

import java.awt.font.FontRenderContext;

import java.awt.geom.AffineTransform;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Calendar;

import java.util.UUID;

import javax.imageio.ImageIO;

import org.apache.commons.lang.StringUtils;

/**

* 勾画圆形公司章

*

* @author ldd

*/

public class DrawSeal {

//生成文件路径

public static final String FILE_PATH = "d:/";

private final static int WIDTH = 160;

private final static int HEIGHT = 110;

/**

* 画圆形章

* @param name1 章的名字

* @param name2 公司的名字

* @param numCode 公司的数字编码

* @param width

* @param height

* @return

*/

public static String drawCircularChapter(String name1, String name2, String numCode){

OutputStream out = null;

InputStream in = null;

//创建缓存

BufferedImage bufImg = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);

//获得画布

Graphics2D gs = bufImg.createGraphics();

//设置颜色

gs.setColor(Color.WHITE);

//填充区域

gs.fillRect(0, 0, WIDTH, HEIGHT);

//设置画笔颜色

gs.setColor(new Color(204,41,41));

//画五角星

drawFiveStar(gs, WIDTH/2, (HEIGHT-10)/2, (HEIGHT-10)/6-3);

//设置画笔宽度

gs.setStroke(new BasicStroke(3));

//画圆形边框

gs.drawOval(2, 2, WIDTH-4, HEIGHT-10);

//设置字体

gs.setFont(new Font("宋体", Font.BOLD, 21));

// 画数据(合同专用章)

drawCenterMessage(gs, name1, WIDTH/2 2, (HEIGHT-10) * 4 / 5);

if (StringUtils.isNotEmpty(name2) && name2.length()>11) {

int len = name2.length();

int fontSize = 18;

switch (len) {

case 12:

fontSize = 20;

break;

case 13:

fontSize = 19;

break;

case 14:

fontSize = 19;

break;

case 15:

fontSize = 18;

break;

case 16:

fontSize = 17;

break;

case 17:

fontSize = 16;

break;

case 18:

fontSize = 15;

break;

case 19:

fontSize = 14;

break;

case 20:

fontSize = 14;

break;

case 21:

fontSize = 12;

break;

case 22:

fontSize = 12;

break;

case 23:

fontSize = 10;

break;

case 24:

fontSize = 10;

break;

case 25:

fontSize = 9;

break;

default :

fontSize = 18;

break;

}

//设置字体

gs.setFont(new Font("宋体", Font.PLAIN, fontSize));

}

//画上方的环形字

drawUpperMessage(gs, name2, WIDTH/2, (HEIGHT-10)/2, WIDTH/2-8, (HEIGHT-10)/2-8);

//设置字体

gs.setFont(new Font("宋体", Font.BOLD, 9));

//画下方的环形数字

drawBelowNumber(gs, numCode, WIDTH/2, (HEIGHT-10)/2, WIDTH/2-8, (HEIGHT-10)/2 8);

//释放此图形的上下文以及它使用的所有系统资源

gs.dispose();

//输出图片

try {

StringBuffer fileDir = new StringBuffer();

fileDir.append(Calendar.getInstance().get(Calendar.YEAR)).append(File.separator).append(Calendar.getInstance().get(Calendar.MONTH) 1).append(File.separator).append(Calendar.getInstance().get(Calendar.DAY_OF_MONTH)).append(File.separator);

File ff = new File(FILE_PATH fileDir.toString());

if (!ff.exists()) {

ff.mkdirs();

}

String imgFile = FILE_PATH fileDir.toString() UUID.randomUUID() ".png";

out = new FileOutputStream(imgFile);

ImageIO.write(bufImg, "png", out);

bufImg.flush();

out.flush();

/*in = new FileInputStream(imgFile);

data = new byte[in.available()];

in.read(data);*/

//对字节数组Base64编码

/*sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();

//返回Base64编码过的字节数组字符串

String encodeStr = encoder.encode(data);

//将图片文件删除

File file = new File(imgFile);

if (file.isFile()) {

file.delete();

}*/

return imgFile;

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

if (null != out) {

try {

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if (null != in) {

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return null;

}

public static void drawCenterMessage(Graphics2D gs, String message, int CENTERX, int CENTERY){

if (message != null) {

// 根据输入字符串得到字符数组

String[] messages2 = message.split("", 0);

String[] messages = new String[messages2.length];

System.arraycopy(messages2, 0, messages, 0, messages2.length);

// 输入的字数

int ilength = messages.length;

Font f = gs.getFont();

FontRenderContext context = gs.getFontRenderContext();

Rectangle2D bounds = f.getStringBounds(message, context);

// 字符宽度＝字符串长度/字符数

double char_interval = (bounds.getWidth() / ilength) - 1;

int first = 0, second = 0;

boolean odd = false;

if (ilength % 2 == 1) {

first = (ilength - 1) / 2;

odd = true;

} else {

first = (ilength) / 2 - 1;

second = (ilength) / 2;

odd = false;

}

if (odd) {

gs.drawString(messages[first],

(float)(CENTERX - char_interval / 2 - char_interval / 10),

(float) CENTERY);

// 中心点的右边

for (int i = first 1; i < ilength; i ) {

double x = CENTERX (i - first - 0.6) * char_interval;

gs.drawString(messages[i],(float) x,

(float) CENTERY);

}

// 中心点的左边

for (int i = first - 1; i > -1; i--) {

double x = CENTERX - (first - i 0.6) * char_interval;

gs.drawString(messages[i],(float) x,

(float) CENTERY);

}

} else {

// 中心点的右边

for (int i = second; i < ilength; i ) {

double x = CENTERX (i - second - 0.1) * char_interval;

gs.drawString(messages[i],(float) x,

(float) CENTERY);

}

// 中心点的左边

for (int i = first; i > -1; i--) {

double x = CENTERX - (first 1 - i 0.1) * char_interval;

gs.drawString(messages[i],(float) x,

(float) CENTERY);

}

}

}

}

/**

* 画上方圆弧的汉字

*

* @param gs

* @param message

* @param CENTERX

* @param CENTERY

* @param r

*/

public static void drawUpperMessage(Graphics2D gs, String message, int CENTERX, int CENTERY, int wr, int hr) {

if (message != null) {

// 根据输入字符串得到字符数组

String[] messages = message.split("", 0);

// String[] messages = new String[messages2.length];

// System.arraycopy(messages2, 0, messages, 0, messages2.length);

// 输入的字数

int ilength = messages.length;

Font f = gs.getFont();

FontRenderContext context = gs.getFontRenderContext();

Rectangle2D bounds = f.getStringBounds(message, context);

// 字符宽度＝字符串长度/字符数

double char_interval = (bounds.getWidth() / ilength) - 1;

// 上坡度

double ascentY = - bounds.getY()-2;

double ascentX = - bounds.getX()-2;

int first = 0, second = 0;

boolean odd = false;

if (ilength % 2 == 1) {

first = (ilength - 1) / 2;

odd = true;

} else {

first = (ilength) / 2 - 1;

second = (ilength) / 2;

odd = false;

}

double r2 = wr - ascentX;

double x0 = CENTERX;

double y0 = CENTERY - hr ascentY;

// 旋转角度

double a = 2 * Math.asin(char_interval / (2 * r2));

if (odd) {

gs.drawString(messages[first],(float)(x0 - char_interval / 2), (float) y0);

// 中心点的右边

for (int i = first 1; i < ilength; i ) {

double aa = (i - first) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],(float) (x0 ax - char_interval / 2 * Math.cos(aa)),

(float) (y0 ay - char_interval / 2 * Math.sin(aa)));

}

// 中心点的左边

for (int i = first - 1; i > -1; i--) {

double aa = (first - i) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(-aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 - ax - char_interval / 2 * Math.cos(aa)),

(float) (y0 ay char_interval / 2 * Math.sin(aa)));

}

} else {

// 中心点的右边

for (int i = second; i < ilength; i ) {

double aa = (i - second 0.3) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 ax - char_interval / 2 * Math.cos(aa)),

(float) (y0 ay - char_interval / 2 * Math.sin(aa)));

}

// 中心点的左边

for (int i = first; i > -1; i--) {

double aa = (first - i 0.7) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(-aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 - ax - char_interval / 2 * Math.cos(aa)),

(float) (y0 ay char_interval / 2* Math.sin(aa)));

}

}

}

}

/**

* 画下方圆弧数字编码

*

* @param gs

* @param message

* @param CENTERX

* @param CENTERY

* @param r

*/

public static void drawBelowNumber(Graphics2D gs, String message, int CENTERX, int CENTERY, int wr, int hr) {

if (message != null) {

// 根据输入字符串得到字符数组

String[] messages = message.split("", 0);

// String[] messages = new String[messages2.length];

// System.arraycopy(messages2, 0, messages, 0, messages2.length);

// 输入的字数

int ilength = messages.length;

Font f = gs.getFont();

FontRenderContext context = gs.getFontRenderContext();

Rectangle2D bounds = f.getStringBounds(message, context);

// 字符宽度＝字符串长度/字符数

double char_interval = (bounds.getWidth() / ilength) 4;

// 上坡度

double ascentY = -bounds.getY();

double ascentX = -bounds.getY();

int first = 0, second = 0;

boolean odd = false;

if (ilength % 2 == 1) {

first = (ilength - 1) / 2;

odd = true;

} else {

first = (ilength) / 2 - 1;

second = (ilength) / 2;

odd = false;

}

double r2 = wr - ascentX;

double x0 = CENTERX;

double y0 = CENTERY - hr ascentY;

// 旋转角度

double a = 2 * Math.asin(char_interval / (2 * r2));

if (odd) {

// 中心点的右边

for (int i = first 1; i < ilength; i ) {

double aa = (i - first 0.5) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(2*Math.PI - aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 ax - char_interval / 2 * Math.cos(aa)),

2*CENTERY - (float) (y0 ay - char_interval / 2 * Math.sin(aa)));

}

// 中心点的左边

for (int i = first; i > -1; i--) {

double aa = (first - i - 0.5) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(2*Math.PI aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 - ax - char_interval / 2 * Math.cos(aa)),

2*CENTERY - (float) (y0 ay char_interval / 2 * Math.sin(aa)));

}

} else {

// 中心点的右边

for (int i = second; i < ilength; i ) {

double aa = (i - second 1) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(2*Math.PI - aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 ax - char_interval / 2 * Math.cos(aa)),

2*CENTERY - (float) (y0 ay - char_interval / 2 * Math.sin(aa)));

}

// 中心点的左边

for (int i = first; i > -1; i--) {

double aa = (first - i) * a;

double ax = r2 * Math.sin(aa);

double ay = r2 - r2 * Math.cos(aa);

AffineTransform transform = AffineTransform.getRotateInstance(2*Math.PI aa);

Font f2 = f.deriveFont(transform);

gs.setFont(f2);

gs.drawString(messages[i],

(float) (x0 - ax - char_interval / 2 * Math.cos(aa)),

2*CENTERY - (float) (y0 ay char_interval / 2* Math.sin(aa)));

}

}

}

}

/**

* 画章中间的五角星

*

* @param g

* @param x

* @param y

* @param r

*/

public static void drawFiveStar(Graphics g, int x, int y, int r) {

double ch=72*Math.PI/180;

int x1=x,

x2=(int)(x-Math.sin(ch)*r),

x3=(int)(x Math.sin(ch)*r),

x4=(int)(x-Math.sin(ch/2)*r),

x5=(int)(x Math.sin(ch/2)*r);

int y1=y-r,

y2=(int)(y-Math.cos(ch)*r),

y3=y2,

y4=(int)(y Math.cos(ch/2)*r),

y5=y4;

int bx=(int)(x Math.cos(ch)*Math.tan(ch/2)*r);

int by=y2;

Polygon a=new Polygon();

Polygon b=new Polygon();

a.addPoint(x2,y2);

a.addPoint(x5,y5);

a.addPoint(bx,by);

b.addPoint(x1,y1);

b.addPoint(bx,by);

b.addPoint(x3,y3);

b.addPoint(x4,y4);

g.fillPolygon(a);

g.fillPolygon(b);

}

public static void main(String[] args) {

drawCircularChapter("国税局", "广州发展有限公司", "A1002");

}

}

===========================================================

/**

* 写入到pdf 公章处

*/

private void drawSeal(){

//pdf模板所在路径 (通过类名获取文件路径)

String templateFileName = DrawSeal2.class.getClassLoader().getResource("sb_loan_contract_borrow.pdf").getFile();

//使用itext的包读取pdf模板

PdfReader pdfReader = new PdfReader(templateFileName);

// 提取pdf中的表单输入域字段

AcroFields form = pdfStamper.getAcroFields();

// 通过域名获取所在页(页数)和坐标，左下角为起点

int pageNo = form.getFieldPositions("Chapter").get(0).page;

Rectangle signRect = form.getFieldPositions("Chapter").get(0).position;

//获取x y 坐标

float x = signRect.getLeft();

float y = signRect.getBottom();

//生成一个签章（用java.awt 画一个章） 章:上需要几个常量值Constants.CHAPTER_NAME, Constants.CHAPTER_COMPANY_NAME, Constants.CHAPTER_SOCIAL_NUMBER

String imgPath = DrawSeal.drawCircularChapter(Constants.CHAPTER_NAME, Constants.CHAPTER_COMPANY_NAME, Constants.CHAPTER_SOCIAL_NUMBER);

// 读图片

Image image = Image.getInstance(imgPath);

// 获取操作的页面

PdfContentByte under = pdfStamper.getOverContent(pageNo);

// 根据域的大小缩放图片

image.scaleToFit(signRect.getWidth(), signRect.getHeight());

// 添加图片

image.setAbsolutePosition(x, y);

under.addImage(image);

pdfStamper.flush();

pdfStamper.close();

pdfReader.close();

}

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