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yzpureV2EX 第 325889 号会员，加入于 2018-06-30 20:11:02 +08:00 |
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2018-12-29 14:22:03 +08:00 回复了 codechaser 创建的主题 › Java › 请教一下为什么我这样 POST 总是会返回 400？ |
header 和 data 之间少一个空行，把最后 buffW.write("\r\n")上移一行。另外 header 最好加上 Content-Length
2018-12-28 19:03:57 +08:00 回复了 samples 创建的主题 › 程序员 › Java 如何根据头像地址生成圆形的头像？ |
随便写了下，ARGB 带透明效果，输出 png 图片也会比 jpg 大不少，实时生成图片比较耗时的，访问量大的话要注意
----------------------代码分割线-------------------------
public static void main(String[] args) throws IOException {
String str = "这里是图片链接";
URL url = new URL(str);
BufferedImage srcImage = ImageIO.read(url);
int width = srcImage.getWidth();
int height = srcImage.getHeight();
BufferedImage dstImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = dstImage.createGraphics();
TexturePaint texturePaint = new TexturePaint(srcImage, new Rectangle2D.Float(0, 0, width, height));
g2.setPaint(texturePaint);
Ellipse2D.Float ellipse = new Ellipse2D.Float(0, 0, width, height);
// 抗锯齿
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.fill(ellipse);
g2.dispose();
// write to file
ImageIO.write(dstImage, "png", new File("portrait.png"));
// to bytes or inputStream 略
}
----------------------代码分割线-------------------------
public static void main(String[] args) throws IOException {
String str = "这里是图片链接";
URL url = new URL(str);
BufferedImage srcImage = ImageIO.read(url);
int width = srcImage.getWidth();
int height = srcImage.getHeight();
BufferedImage dstImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = dstImage.createGraphics();
TexturePaint texturePaint = new TexturePaint(srcImage, new Rectangle2D.Float(0, 0, width, height));
g2.setPaint(texturePaint);
Ellipse2D.Float ellipse = new Ellipse2D.Float(0, 0, width, height);
// 抗锯齿
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.fill(ellipse);
g2.dispose();
// write to file
ImageIO.write(dstImage, "png", new File("portrait.png"));
// to bytes or inputStream 略
}
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