java 图片合成

public class Test {
    public static final void overlapImage(String bigPath, String smallPath) {
        try {
          BufferedImage big = ImageIO.read(new File(bigPath));
          BufferedImage small = ImageIO.read(new File(smallPath));
          Graphics2D g = big.createGraphics();
          System.out.println(big.getWidth());
          System.out.println(small.getWidth());
          System.out.println(big.getHeight());
          System.out.println(small.getHeight());
          int x = (big.getWidth() - small.getWidth()) / 2;
          int y = (big.getHeight() - small.getHeight()) / 2;
          g.drawImage(small, x, y, small.getWidth(), small.getHeight(), null);
          g.dispose();
          ImageIO.write(big, "png", new File("E://3.png"));
        } catch (Exception e) {
          e.printStackTrace();
        }
      }

    

/**
     * 图片上加字

     */

public static void createStringMark(String filePath, String markContent, Color markContentColor, 
float qualNum, String outPath) {
ImageIcon imgIcon = new ImageIcon(filePath);
Image theImg = imgIcon.getImage();
int width = theImg.getWidth(null) == -1 ? 200 : theImg.getWidth(null);
int height = theImg.getHeight(null) == -1 ? 200 : theImg.getHeight(null);
System.out.println(width);
System.out.println(height);
// System.out.println(theImg);
BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bimage.createGraphics();
g.setColor(markContentColor);
g.setBackground(Color.red);
g.drawImage(theImg, 0, 0, null);
g.setFont(new Font("Microsoft YaHei", Font.PLAIN, 45)); // 字体、字型、字号
g.drawString(markContent, 155, 1400); // 画文字的位置
g.dispose();
try {
FileOutputStream out = new FileOutputStream(outPath); // 先用一个特定的输出文件名
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
param.setQuality(qualNum, true);
encoder.encode(bimage, param);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}

      public static final void main(String[] args) {

        overlapImage("E://2.png", "E://1.png");// 图片合成

       createStringMark("E://test/3.png", "加字内容", new Color(137, 137, 137)或者Color.red, 100, "E://test/3.png"); //图片上加字

      }
}