生成一个签章(用java.awt画一个签章) 并添加到pdf 公章处
package com.bjpowernode.p2p.admin.util;
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.lang3.StringUtils;
import com.bjpowernode.p2p.admin.config.SystemConfig;
/**
* 勾画圆形公司章
*
* @author ldd
*/
public class DrawSeal {
//生成文件路径
public static final String FILE_PATH = SystemConfig.getConfigProperty("seal_img_path");
private final static int WIDTH = 160;
private final static int HEIGHT = 160;
/**
* 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;
byte[] data = 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/2, HEIGHT/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-4);
//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 * 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/2, WIDTH/2-10);
//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/2, HEIGHT/2);
//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() + ".bmp";
out = new FileOutputStream(imgFile);
ImageIO.write(bufImg, "bmp", 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 r) {
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;
// 上坡度
double ascent = -bounds.getY()-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 = r - ascent;
double x0 = CENTERX;
double y0 = CENTERY - r + ascent;
// 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 r) {
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 - 1];
System.arraycopy(messages2, 1, messages, 0, messages2.length - 1);
// 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 ascent = -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 = r - ascent;
double x0 = CENTERX;
double y0 = CENTERY - r + ascent;
// 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);
}
}
-----------------------------------------华丽的分割线 如果你需要以上操作 直接复制粘贴即可------------------------------------------------------------------------
//写入到pdf 公章处
//pdf模板所在路径 (通过类名获取文件路径)
String templateFileName = ContractServiceImpl.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();