处理图片的工具类

package com.ideal.common.util; 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;

import net.glxn.qrgen.core.AbstractQRCode;
import net.glxn.qrgen.core.image.ImageType;
import net.glxn.qrgen.javase.QRCode;

/**
 *
 */
public final class ImageUtils {
    /**
     * 图片上加图片
     * @param pressImg 生成二维码的url
     * @param targetImg 
     * @param x 
     * @param y 
     * @param alpha
     */
    public final static void pressImage(String pressImg, String srcImg, String targetImg, int x, int y, float alpha) {
        try {
            File target = new File(targetImg);
            File img = new File(srcImg);
            Image src = ImageIO.read(img);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);
            //
            File qrCode = QRCode.from(pressImg).withCharset("UTF-8").to(ImageType.PNG).withSize(182, 182).file();
            Image src_biao = ImageIO.read(qrCode);
            //Image src_biao = ImageIO.read(new File(pressImg));
            int wideth_biao = src_biao.getWidth(null);
            int height_biao = src_biao.getHeight(null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
            //g.drawImage(src_biao, (wideth - wideth_biao) / 2, (height - height_biao) / 2, wideth_biao, height_biao, null);
            g.drawImage(src_biao, 126, 823, wideth_biao, height_biao, null);
            //
            g.dispose();
            ImageIO.write((BufferedImage) image, "png", target);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 添加文字
     * @param pressText 
     * @param targetImg 目标图片
     * @param fontName
     * @param fontStyle 
     * @param color 
     * @param fontSize 
     * @param x
     * @param y 
     * @param alpha
     */
    public static File pressText(String data, String srcImg, String fontName, int fontStyle, Color color, int fontSize, int x, int y, float alpha) {
        try {
             
            
            //Cpp cp = new Cpp(srcImg,targetImg);
            File img = new File(srcImg);
            Image src = ImageIO.read(img);
            int width = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(src, 0, 0, width, height, null);
            g.setColor(color);
            Font font = new Font(fontName, fontStyle, fontSize);
            g.setFont(font);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
            // 计算字符并且换行处理
            // 
            /*if (data.length()< 32) {
                g.drawString(data, (width - (getLength(data) * fontSize)) / 2+ x, (height - fontSize)  + y);
                
            }else{
                for (int i = 0; i < data.length(); i++) {
                    
                }
                
            }*/
            //g.drawString(data, -410, 25);
            g.drawString(data, (width - (getLength(data) * fontSize)) / 2+ x, 100);
            g.dispose();
            
            //FileOutputStream outImgStream = new FileOutputStream(targetImg); 
            // 输出图片
             ImageIO.write((BufferedImage) image, "png", img);
            // 转成输出流
//            ByteArrayOutputStream os = new ByteArrayOutputStream();  
//            ImageIO.write(image, "png", os);  
//            InputStream is = new ByteArrayInputStream(os.toByteArray());
            
            
            //ImageIO.read(img); // 写入文件
            return img;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 重置图片的大小
     * @param filePath 
     * @param height 
     * @param width 
     * @param bb
     */
    public static void resize(String filePath, int height, int width, boolean bb) {
        try {
            double ratio = 0.0; //
            File f = new File(filePath);
            BufferedImage bi = ImageIO.read(f);
            Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);
            //
            if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
                if (bi.getHeight() > bi.getWidth()) {
                    ratio = (new Integer(height)).doubleValue() / bi.getHeight();
                } else {
                    ratio = (new Integer(width)).doubleValue() / bi.getWidth();
                }
                AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);
                itemp = op.filter(bi, null);
            }
            if (bb) {
                BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                Graphics2D g = image.createGraphics();
                g.setColor(Color.white);
                g.fillRect(0, 0, width, height);
                if (width == itemp.getWidth(null))
                    g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);
                else
                    g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);
                g.dispose();
                itemp = image;
            }
            ImageIO.write((BufferedImage) itemp, "png", f);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    

    public static int getLength(String text) {
        int length = 0;
        for (int i = 0; i < text.length(); i++) {
            if (new String(text.charAt(i) + "").getBytes().length > 1) {
                length += 2;
            } else {
                length += 1;
            }
        }
        return length / 2;
    }
    
    /**
     *  画空白图片
     * @throws IOException 
     */
    public static void drawVerifyCode() throws IOException{
        File file = new File("E:\\test\\1.png");
        int width = 400;
        int height = 400;
        // 创建一个画布
        BufferedImage bi = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        // 获取一个画笔
        Graphics2D g = bi.createGraphics();
        // 画图过程
        // 设置画笔的颜色为白色
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, width, height);
        // 绘制灰色边框
        g.setColor(Color.GRAY);
        g.drawRect(0, 0, width - 1, height - 1);
        // 将画布输出到文件中
        ImageIO.write(bi, "PNG", file);
    }
    
    public static File getInputStream(String pressImg,String title,String content, String path) {
        //String pressImg = "E:/test/c.png"; // 生成二维码的url
        String modelImg = path+"mb.png";
        String targetImg = path+"send.png";
        // 添加小图片
        pressImage(pressImg, modelImg,targetImg, 0, 0, 1.0f);
        //title = "  您所在的社区新增了一条通知,请扫码前去查看";
        // 添加文字
        return pressText(title, targetImg,"微软雅黑", Font.BOLD, Color.RED, 25, 0,0, 1.0f);
    }
    
    public static void main(String[] args) throws IOException {
//        drawVerifyCode();
//        String path = "E:/test/";
//     
        String pressImg = "E:/test/c.png"; // 生成二维码的url
        String modelImg = "E:/test/mb.png";
        String targetImg = "E:/test/ts.png";
        // 添加小图片
        pressImage(pressImg, modelImg,targetImg, 0, 0, 1.0f);
        String data = "  随便说点啥";
//
        // 添加文字
    pressText(data, targetImg,"微软雅黑", Font.BOLD, Color.RED, 25, 0,0, 1.0f);
//    resize("E:/test/c.png", 182, 182, true);
//        String data = "开始加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字,这是加文字吗多加文字";
//        int length = getLength(data);
//        System.out.println(length);
    }
}