java切图片圆角

import xyz.laremehpe.FileUtil.FileChooser;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;

public class roundImg {
    /**图片圆角处理，背景透明化
     * @param srcImageFile 原图片
     * @param result  处理后图片
     * @param type   图片格式
     * @param cornerRadius  720为圆角
     */
    public static void main(String[] args) {
        new roundImg(50);//圆角度数
    }

    public roundImg(int radius){
        String src = FileChooser(0);
        String affix = src.substring(src.length()-3);
        if("".equals(src))return;
        String replacement = "\\\\"+new Date().getTime()+"."+affix;
        String res = src.replaceAll("\\\\[a-zA-Z0-9\u4e00-\u9fa5]*\\."+affix,replacement);
        makeRoundedCorner(new File(src),new File(res),affix,radius);
    }

    public String FileChooser(int type) {// 1 -> directory 0 -> file
        JFileChooser jc = new JFileChooser();
        jc.setFileSelectionMode(type);
        jc.setDialogTitle("Select file");
        jc.setCurrentDirectory(FileSystemView.getFileSystemView().getHomeDirectory());// set default directory as
        jc.showOpenDialog(null);
        return jc.getSelectedFile().toString();
    }

public void makeRoundedCorner(File srcImageFile, File result, String type, int cornerRadius) {
        try {
            BufferedImage bi1 = ImageIO.read(srcImageFile);

            // 根据需要是否使用 BufferedImage.TYPE_INT_ARGB
            BufferedImage image = new BufferedImage(bi1.getWidth(), bi1.getHeight(),
                    BufferedImage.TYPE_INT_ARGB);

            Ellipse2D.Double shape = new Ellipse2D.Double(0, 0, bi1.getWidth(), bi1
                    .getHeight());

            Graphics2D g2 = image.createGraphics();
            image = g2.getDeviceConfiguration().createCompatibleImage(bi1.getWidth(), bi1.getHeight(), Transparency.TRANSLUCENT);
            g2 = image.createGraphics();
            g2.setComposite(AlphaComposite.Clear);
            g2.fill(new Rectangle(image.getWidth(), image.getHeight()));
            g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 1.0f));
            g2.setClip(shape);
            // 使用 setRenderingHint 设置抗锯齿
            g2 = image.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2.fillRoundRect(0, 0,bi1.getWidth(), bi1.getHeight(), cornerRadius, cornerRadius);
            g2.setComposite(AlphaComposite.SrcIn);
            g2.drawImage(bi1, 0, 0, bi1.getWidth(), bi1.getHeight(), null);
            g2.dispose();
            ImageIO.write(image, type, result);
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
}