我的web应用程序中有servlet提供图像,当我访问那些带有浏览器图像的URL时,服务器是正确的。然后我有另一个调整图像大小的servlet,想法是在resize servlet中通过url访问get图像,然后调整图像大小。但由于某种原因,以下所有方法都返回null,但是当我使用浏览器访问给定的URL时,图像显示正确。
URL imageURL = new URL(fullUrl);
// Case 1
RenderedImage img = ImageIO.read(imageURL);
// Case 2
BufferedImage img = JAI.create("url", imageURL).getAsBufferedImage();
// Case 3
Image img = java.awt.Toolkit.getDefaultToolkit().getDefaultToolkit().createImage(imageURL);
答案 0 :(得分:22)
URL url = new URL("http://www.digitalphotoartistry.com/rose1.jpg");
Image image = ImageIO.read(url);
或
URL url = new URL("http://www.digitalphotoartistry.com/rose1.jpg");
java.awt.Image image = java.awt.Toolkit.getDefaultToolkit().createImage(url);
更新:
此代码适用于我 请尝试检查您的网址。
public static void main(String[] args) throws Exception {
URL imageURL = new URL("http://www.digitalphotoartistry.com/rose1.jpg");
// Case 1
RenderedImage img = ImageIO.read(imageURL);
System.out.println(img);
}
输出:
BufferedImage@e80a59: type = 5 ColorModel: #pixelBits = 24 numComponents = 3 col
or space = java.awt.color.ICC_ColorSpace@1ff5ea7 transparency = 1 has alpha = fa
lse isAlphaPre = false ByteInterleavedRaster: width = 553 height = 737 #numDataE
lements 3 dataOff[0] = 2
答案 1 :(得分:0)
答案 2 :(得分:0)
显示从JFrame中的URL读取的图像。 urlLocation
指向图片的URL。
public class ShowImageFromURL {
public static void show(String urlLocation) {
Image image = null;
try {
URL url = new URL(urlLocation);
URLConnection conn = url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/5.0");
conn.connect();
InputStream urlStream = conn.getInputStream();
image = ImageIO.read(urlStream);
JFrame frame = new JFrame();
JLabel lblimage = new JLabel(new ImageIcon(image));
frame.getContentPane().add(lblimage, BorderLayout.CENTER);
frame.setSize(image.getWidth(null) + 50, image.getHeight(null) + 50);
frame.setVisible(true);
} catch (IOException e) {
System.out.println("Something went wrong, sorry:" + e.toString());
e.printStackTrace();
}
}
}
参考:https://gist.github.com/aslamanver/92af3ac67406cfd116b7e4e177156926