我很久以前就写过这个实用函数(它也可以在旧的 ColdFusion 版本上运行)。也许它有帮助。
请注意,这需要Java 高级成像图像 I/O 工具( Jai-imageio )。下载 .jar 并将其放在您的类路径中(需要重新启动 CF)。
/**
* Reads basic properties of many types of images. Values are
* returned as a struct consisting of the following elements:
*
* Property names, their types and default values:
* ImgInfo.width = 0 (pixels)
* ImgInfo.height = 0 (pixels)
* ImgInfo.size = 0 (bytes)
* ImgInfo.isGrayscale = false (boolean)
* ImgInfo.isFile = false (boolean)
* ImgInfo.success = false (boolean)
* ImgInfo.error = "" (string)
*
* @param FilePath Physical path to image file.
* @return A struct, as described.
*/
function GetImageProperties(FilePath) {
var ImgInfo = StructNew();
var jImageIO = CreateObject("java", "javax.imageio.ImageIO");
var jFile = CreateObject("java", "java.io.File").init(FilePath);
var jBufferedImage = 0;
var jColorSpace = 0;
ImgInfo.width = "";
ImgInfo.height = "";
ImgInfo.fileSize = 0;
ImgInfo.isGrayscale = false;
ImgInfo.isFile = jFile.isFile();
ImgInfo.success = false;
ImgInfo.error = "";
try {
jBufferedImage = jImageIO.read(jFile);
ImgInfo.fileSize = jFile.length();
ImgInfo.width = jBufferedImage.getWidth();
ImgInfo.height = jBufferedImage.getHeight();
jColorSpace = jBufferedImage.getColorModel().getColorSpace();
ImgInfo.isGrayscale = (jColorSpace.getType() eq jColorSpace.TYPE_GRAY);
ImgInfo.success = true;
}
catch (any ex) {
ImgInfo.error = ToString(ex);
}
jImageIO = JavaCast("null", "");
jFile = JavaCast("null", "");
jBufferedImage = JavaCast("null", "");
jColorSpace = JavaCast("null", "");
return ImgInfo;
}
像这样使用:
imageInfo = GetImageProperties(theImageSrc);
if (imageInfo.success and imageInfo.width > 100)
writeOutput('<img src="#HTMLEditFormat(theImageSrc)#" />');
}