java 实现图片圆角处理、背景透明化

 /**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  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 } }

  net.coobirdthumbnailator0.4.8

 package com.image; import java.awt.AlphaComposite; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Point; import java.awt.Transparency; import java.awt.geom.Ellipse2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import net.coobird.thumbnailator.Thumbnails; import net.coobird.thumbnailator.geometry.Position; public class ImageDo { public static void main(String[] args) throws IOException { //首先获取 makeRoundedCorner("C:/Users/luojie/Desktop/0.jpg-600", "C:/Users/luojie/Desktop/2.png-600", "png", 170); //后续水印在背景图片的的x轴y轴的坐标 Position ab=  new Position() { @Override public Point calculate(int enclosingWidth, int enclosingHeight, int width, int height, int insetLeft, int insetRight, int insetTop, int insetBottom) { // TODO Auto-generated method stub return new Point(89, 53); } }; //把生成的圆形图片变换成宽高142x142的图片 Thumbnails.of("C:/Users/luojie/Desktop/2.png-600").size(142, 142).toFile( "C:/Users/luojie/Desktop/2_142x142.png-600"); //把生成的圆形图片，当水印贴到背景图中，ab为圆形图片应该到背景图的x轴y轴的坐标 Thumbnails.of("C:/Users/luojie/Desktop/cmbg.png-600").size(1280, 1024).watermark(ab, ImageIO.read(new File("C:/Users/luojie/Desktop/2_142x142.png-600")), 1f) .outputQuality(0.8f).toFile("C:/Users/luojie/Desktop/image_watermark_bottom_right.jpg-600"); //给文字水印 pressText("C:/Users/luojie/Desktop/image_watermark_bottom_right.jpg-600", "WEIXINYONGHU", "Comic Sans MS", Font.BOLD, 30, Color.BLACK,275, 65, 1f); } /** * 添加文字水印 * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg-600 * @param pressText 水印文字， 如：中国证券网 * @param fontName 字体名称，    如：宋体 * @param fontStyle 字体样式，如：粗体和斜体(Font.BOLD|Font.ITALIC) * @param fontSize 字体大小，单位为像素 * @param color 字体颜色 * @param x 水印文字距离目标图片左侧的偏移量，如果x<0, 则在正中间 * @param y 水印文字距离目标图片上侧的偏移量，如果y<0, 则在正中间 * @param alpha 透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明) */ public static void pressText(String targetImg,String pressText,String fontName,int fontStyle,int fontSize,Color color,int x,int y,float alpha){ try { File file = new File(targetImg); Image image = ImageIO.read(file); int width = image.getWidth(null); int height = image.getHeight(null); BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = bufferedImage.createGraphics(); g.drawImage(image,0,0, width, height, null); g.setFont(new Font(fontName, fontStyle, fontSize)); g.setColor(color); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); int width_wi = fontSize*getTextLength(pressText); int height_wi = fontSize; int widthDiff = width-width_wi; int heightDiff = height-height_wi; if(x<0){ x = widthDiff/2; }else if(x>widthDiff){ x=widthDiff; } if(y<0){ y = heightDiff/2; }else if(y>heightDiff){ y = heightDiff; } g.drawString(pressText, x, y+height_wi);//水印文件 g.dispose(); ImageIO.write(bufferedImage, "JPEG", file); } catch (IOException e) { e.printStackTrace(); } } /** * 计算文字像素长度 * @param text * @return */ private static int getTextLength(String text){ int textLength = text.length(); int length = textLength; for (int i = 0; i  1){ length+=(wordLength-1); } } return length%2==0 ? length/2:length/2+1; } /* * 圆角处理 * @param BufferedImage * @param cornerRadius * */ public static String makeRoundedCorner(String srcImageFile, String result, String type, int cornerRadius) { try { BufferedImage image = ImageIO.read(new File(srcImageFile)); //        int w = image.getWidth(); //        int h = image.getHeight(); int w = image.getWidth(); int h = image.getHeight(); BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = output.createGraphics(); output = g2.getDeviceConfiguration().createCompatibleImage(w, h, Transparency.TRANSLUCENT); g2.dispose(); g2 = output.createGraphics(); //这里绘画圆角矩形 //        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); //        g2.fillRoundRect(0, 0,w, h, cornerRadius, cornerRadius); //        g2.setComposite(AlphaComposite.SrcIn); //这里绘画原型图 Ellipse2D.Double shape = new Ellipse2D.Double(0, 0,w, h); g2.setClip(shape); g2.drawImage(image, 0, 0, w, h, null); g2.dispose(); ImageIO.write(output, type, new File(result)); return result; } catch (IOException e) { e.printStackTrace(); } return null; } }