Java下载图片三. 拼图——像美图秀秀、发微博那样可以拼长图

参考代码一：

    import java.awt.image.BufferedImage;  
    import java.io.File;  
      
    import javax.imageio.ImageIO;  
      
    /** 
     * @author happy 
     *  
     */  
    public class SpellImg {  
        public static void main(String[] args) {  
            try {  
                // 读取第一张图片  
                File fileOne = new File("E:\\Test\\5.png");  
                BufferedImage ImageOne = ImageIO.read(fileOne);  
                int width = ImageOne.getWidth();// 图片宽度  
                int height = ImageOne.getHeight();// 图片高度  
                // 从图片中读取RGB  
                int[] ImageArrayOne = new int[width * height];  
                ImageArrayOne = ImageOne.getRGB(0, 0, width, height, ImageArrayOne,  
                        0, width);  
                // 对第二张图片做相同的处理  
      
                File fileTwo = new File("E:\\Test\\6.png");  
                BufferedImage ImageTwo = ImageIO.read(fileTwo);  
                int[] ImageArrayTwo = new int[width * height];  
                ImageArrayTwo = ImageTwo.getRGB(0, 0, width, height, ImageArrayTwo,  
                        0, width);  
                // 生成新图片  
                // BufferedImage ImageNew = new BufferedImage(width * 2, height,  
                // BufferedImage.TYPE_INT_RGB);// （左右）  
                BufferedImage ImageNew = new BufferedImage(width, height * 2,  
                        BufferedImage.TYPE_INT_ARGB); // （上下）  
                // TYPE_INT_ARGB（不丢失alpha）TYPE_INT_RGB（丢失alpha）  
                ImageNew.setRGB(0, 0, width, height, ImageArrayOne, 0, width);// 设置左半部分的RGB  
                // ImageNew.setRGB(width, 0, width, height, ImageArrayTwo, 0,  
                // width);// 设置右半部分的RGB（左右）  
                ImageNew.setRGB(0, height, width, height, ImageArrayTwo, 0, width);// 设置右半部分的RGB（上下）  
                File outFile = new File("E:\\Test\\8.png");  
                ImageIO.write(ImageNew, "png", outFile);// 写图片  
      
                System.out.println("success!");  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }  
      
    }  

 

参考代码二：

    /** 
         * Java拼接多张图片 
         *  
         * @param pics 
         * @param type 
         * @param dst_pic 
         * @return 
         */  
        public static boolean merge(String[] pics, String type, String dst_pic) {  
      
            int len = pics.length;  
            if (len < 1) {  
                System.out.println("pics len < 1");  
                return false;  
            }  
            File[] src = new File[len];  
            BufferedImage[] images = new BufferedImage[len];  
            int[][] ImageArrays = new int[len][];  
            for (int i = 0; i < len; i++) {  
                try {  
                    src[i] = new File(pics[i]);  
                    images[i] = ImageIO.read(src[i]);  
                } catch (Exception e) {  
                    e.printStackTrace();  
                    return false;  
                }  
                int width = images[i].getWidth();  
                int height = images[i].getHeight();  
                ImageArrays[i] = new int[width * height];// 从图片中读取RGB  
                ImageArrays[i] = images[i].getRGB(0, 0, width, height,  
                        ImageArrays[i], 0, width);  
            }  
      
            int dst_height = 0;  
            int dst_width = images[0].getWidth();  
            for (int i = 0; i < images.length; i++) {  
                dst_width = dst_width > images[i].getWidth() ? dst_width  
                        : images[i].getWidth();  
      
                dst_height += images[i].getHeight();  
            }  
            System.out.println(dst_width);  
            System.out.println(dst_height);  
            if (dst_height < 1) {  
                System.out.println("dst_height < 1");  
                return false;  
            }  
      
            // 生成新图片  
            try {  
                // dst_width = images[0].getWidth();  
                BufferedImage ImageNew = new BufferedImage(dst_width, dst_height,  
                        BufferedImage.TYPE_INT_RGB);  
                int height_i = 0;  
                for (int i = 0; i < images.length; i++) {  
                    ImageNew.setRGB(0, height_i, dst_width, images[i].getHeight(),  
                            ImageArrays[i], 0, dst_width);  
                    height_i += images[i].getHeight();  
                }  
      
                File outFile = new File(dst_pic);  
                ImageIO.write(ImageNew, type, outFile);// 写图片  
            } catch (Exception e) {  
                e.printStackTrace();  
                return false;  
            }  
            return true;  
        }