javax.imageio.IIOException：无法读取输入文件
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javax.imageio.IIOException: Can't read input file
提问by pacman4565
I am building a program that compresses a given image and saves it as a JPEG. This is the error message I get:
我正在构建一个压缩给定图像并将其保存为 JPEG 的程序。这是我收到的错误消息：
Exception in thread "main" javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(Unknown Source)
at JPEGCompression.main(JPEGCompression.java:23)
Here is my main:
这是我的主要内容：
public class JPEGCompression {
public static void main(String[] args) throws IOException{
String imageFile = "/tmp/garden.png";
BufferedImage i = ImageIO.read(new File(imageFile)); // this line produces the error
showImage("Original Image", i);
compressAndShow(i, 0.7f);
}
回答by user2718114
You have no checks for if the file exists / have permissions for the file, that would be my first debugging step.
您没有检查文件是否存在/是否具有该文件的权限，这将是我的第一个调试步骤。
Also try the following: String imageFile = "./tmp/garden.png";
还可以尝试以下操作： String imageFile = "./tmp/garden.png";
I always put a .before my slash to tell it I'm talking about the current directory, though I don't think it is required.
我总是.在我的斜线前面放一个，告诉它我在谈论当前目录，尽管我认为这不是必需的。
回答by yuanfang
I have also met this problem. The answer is that the model of the picture is wrong. So you should change the model of the picture from 'CMYK' TO 'RGB'. CMYK is for printer, and RGB is for computer. You can use photoshop or imageMagick to get it done.
我也遇到过这个问题。答案是图片的型号不对。因此，您应该将图片的模型从“CMYK”更改为“RGB”。CMYK 是打印机用的，RGB 是电脑用的。您可以使用 photoshop 或 imageMagick 来完成它。
