实现将两压缩好的图片 写在一张画布上

思路，先成一个足够大的画布 放入两张相片

以下代码需要改进

import java.awt.AlphaComposite;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import javax.imageio.ImageIO;

public class IMG {

/**

*

* @param filesrc

* @param logosrc

* @param outsrc

* @param x 位置

* @param y 位置

*/

public void composePic(String filesrc,String logosrc,String outsrc,int x,int y) {

try {

File bgfile = new File(filesrc);

Image bg_src = javax.imageio.ImageIO.read(bgfile);

File logofile = new File(logosrc);

Image logo_src = javax.imageio.ImageIO.read(logofile);

int bg_width = bg_src.getWidth(null);

int bg_height = bg_src.getHeight(null);

int logo_width = logo_src.getWidth(null);;

int logo_height = logo_src.getHeight(null);

BufferedImage tag = new BufferedImage(bg_width, bg_height, BufferedImage.TYPE_INT_RGB);

Graphics2D g2d = tag.createGraphics();

g2d.drawImage(bg_src, 0, 0, bg_width, bg_height, null);

g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,1.0f)); //透明度设置开始

g2d.drawImage(logo_src,x,y,logo_width,logo_height, null);

g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); //透明度设置 结束

FileOutputStream out = new FileOutputStream(outsrc);

ImageIO.write(tag, "jpg", out);//写图片

/* JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

encoder.encode(tag);*/

out.close();

}catch (Exception e) {

e.printStackTrace();

}

}

public static void main(String args[]) {

Long star = System.currentTimeMillis();

IMG pic = new IMG();

pic.composePic("f:\\7.jpg","f:\\6.jpg","f:\\out.jpg",490,360);

Long end =System.currentTimeMillis();

System.out.print("time====:"+(end-star));

}

}