javax.imageio

问题 imageURL: https://fbexternal-a.akamaihd.net/safe_image.php?d=AQBB77GLfY75FNWL&w=720&h=2048&url=http%3A%2F%2Fwww.facebook.com%2Fads%2Fimage%2F%3Fd%3DAQI0duFYFcmydWNutbwmSk2DfOmHcDrhPfsMJTUoEObbWkVzYUtrHgCuN_LFrWcPRzJi6jPgbn80oFs0Kj_WrdROjdnJkjbnS5-UJv9l9cJyhKCWS-lr-MXlc263Ul3Txe-VFqXfRrA6BOjt4DF-Sww2&ext=best URL url = new URL(imageURL); BufferedImage image = ImageIO.read(url); or URL url = new URL(imageURL); BufferedImage image = ImageIO.read(url.openStream()); the result image is null? why?

问题 I hope you guys can help me with this one. I'm not sure if it is a bug in Java or if I'm doing something wrong, but I'll go with the latter. I want to turn a BufferedImage into a GIF image. I then wish to keep the GIF in the memory in the form of a byte array. (I do not want to save the file to disk) The program should capture a screen segment (just to create a quick image) and turn it into a GIF byte array using ImageIO ImageWriter and ByteArrayOutputStream. The code below will show you the

问题 I hope you guys can help me with this one. I'm not sure if it is a bug in Java or if I'm doing something wrong, but I'll go with the latter. I want to turn a BufferedImage into a GIF image. I then wish to keep the GIF in the memory in the form of a byte array. (I do not want to save the file to disk) The program should capture a screen segment (just to create a quick image) and turn it into a GIF byte array using ImageIO ImageWriter and ByteArrayOutputStream. The code below will show you the

问题 We have some very large jpgs which are used when print on A0 printers. The problem is that we need to convert this large image down to a thumbnail for use in a few java UIs. Is there any way to convert the image (with Java) without loading the whole image into memory? Currently we get out of memory exceptions when we try to load the images. Is there anything in the standard code or is my best bet to use jmagick? A pure java implementation would be best for our deployment. Thanks 回答1: I

问题 I am very confused with this issue. I am using 1.3.0 version on jai-imageio-core please check the dependecy below and I am at complete loss to figure out from the jar how can one class file (RawImageReaderSpi) is loaded in JVM but RawImageInputStream is not loaded. I have deployed my spring boot web service in tomcat 7 container. This issue pops up randomly and I have noticed that when I have restarted the TC container and deployed new version of my service, this issue shows up intermittently

问题 When using javax.imageio.ImageIO to load a large-resolution (9000x9000) JPEG from disk, it takes more than 1 minute in my scala application. I tried creating a Java-only project, but it still takes too long - around 30 seconds. This is how I load the image: File file = new File("/Users/the21st/slow2.jpg"); BufferedImage image = ImageIO.read(file); Is there any way to improve performance on reading progressively encoded large-res JPEGs in Java? The image in question is this one (moderators,

问题 When using javax.imageio.ImageIO to load a large-resolution (9000x9000) JPEG from disk, it takes more than 1 minute in my scala application. I tried creating a Java-only project, but it still takes too long - around 30 seconds. This is how I load the image: File file = new File("/Users/the21st/slow2.jpg"); BufferedImage image = ImageIO.read(file); Is there any way to improve performance on reading progressively encoded large-res JPEGs in Java? The image in question is this one (moderators,

问题 When using javax.imageio.ImageIO to load a large-resolution (9000x9000) JPEG from disk, it takes more than 1 minute in my scala application. I tried creating a Java-only project, but it still takes too long - around 30 seconds. This is how I load the image: File file = new File("/Users/the21st/slow2.jpg"); BufferedImage image = ImageIO.read(file); Is there any way to improve performance on reading progressively encoded large-res JPEGs in Java? The image in question is this one (moderators,

问题 When using javax.imageio.ImageIO to load a large-resolution (9000x9000) JPEG from disk, it takes more than 1 minute in my scala application. I tried creating a Java-only project, but it still takes too long - around 30 seconds. This is how I load the image: File file = new File("/Users/the21st/slow2.jpg"); BufferedImage image = ImageIO.read(file); Is there any way to improve performance on reading progressively encoded large-res JPEGs in Java? The image in question is this one (moderators,

问题 When using javax.imageio.ImageIO to load a large-resolution (9000x9000) JPEG from disk, it takes more than 1 minute in my scala application. I tried creating a Java-only project, but it still takes too long - around 30 seconds. This is how I load the image: File file = new File("/Users/the21st/slow2.jpg"); BufferedImage image = ImageIO.read(file); Is there any way to improve performance on reading progressively encoded large-res JPEGs in Java? The image in question is this one (moderators,