创建一个简单的签章

package com.hxc;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import sun.font.FontDesignMetrics;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;

public class SignImage {
    /**
     * 创建一个签章
     * @param docotorName 医生名字
     * @param hospittalName 医生名称
     * @param date 签名日期
     * @param jpgName 图片名
     * @return
     */
    public static boolean createSignTextImg(String docotorName,String hospittalName,String date,String jpgName){
        int width = 255;
        int height = 100;
        FileOutputStream out = null;
        //背景色
        Color bgcolor = Color.WHITE;
        //字色
        Color fontcolor = Color.RED;
        Font docotorNameFont = new Font(null, com.itextpdf.text.Font.BOLD, 20);
        Font otherTextFont = new Font(null, Font.BOLD, 18);
        try {//宽度、高度
            BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bimage.createGraphics();
            g.setColor(bgcolor); //背景色
            g.fillRect(0,0,width,height); //画一个矩形
            //去除锯齿
            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
            g.setColor(Color.RED);
            g.fillRect(0, 0, 8, height);
            g.fillRect(0, 0, width, 8);
            g.fillRect(0, height - 8, width, height);
            g.fillRect(width - 8, 0, width, height);

            g.setColor(fontcolor); //字的颜色
            g.setFont(docotorNameFont); //字体字形字号
            FontMetrics fm = FontDesignMetrics.getMetrics(docotorNameFont);
            int font1_Hight = fm.getHeight();
            int strWidth = fm.stringWidth(docotorName);
            int y = 35;
            int x = (width-strWidth)/2;
            g.drawString(docotorName, x, y); // 在指定坐标除添加文字
            g.setFont(otherTextFont); // 字体字形字号

            fm = FontDesignMetrics.getMetrics(otherTextFont);
            int font2_Hight = fm.getHeight();
            strWidth = fm.stringWidth(hospittalName);
            x = (width - strWidth) / 2;
            g.drawString(hospittalName, x, y + font1_Hight); // 在指定坐标除添加文字

            strWidth = fm.stringWidth(date);
            x = (width - strWidth) / 2;
            g.drawString(date, x, y + font1_Hight + font2_Hight); // 在指定坐标除添加文字

            g.dispose();
            out = new FileOutputStream(jpgName); // 指定输出文件
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
            param.setQuality(50f, true);
            encoder.encode(bimage, param); // 存盘
            out.flush();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }finally {
            if (out!=null){
                try {
                    out.close();
                }catch (IOException e){
                }
            }
        }
    }

    public static void main(String[] args) {
        createSignTextImg("华佗","在线医院","2020.12.12","sing.jpg");
    }
}