我完成了旋转TIFF图像的应用程序编码,需要使用JAI来处理TIFF文件。
在Eclipse中工作时一切正常,但是每当我为库创建一个fat jar并实现它(按照http://fjep.sourceforge.net/fjeptutorial.html),当我执行java -jar Push.jar \path\to\dir时,它运行到压缩和保存部分时就停止了:
TIFFImageWriterSpi tiffspi = new TIFFImageWriterSpi();
ImageWriter writer = tiffspi.createWriterInstance();
//Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("TIFF");
//ImageWriter writer = iter.next();
ImageWriteParam param2 = writer.getDefaultWriteParam();
param2.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param2.setCompressionType("LZW");
param2.setCompressionQuality(0.0f);
File fOutputFile = workArea[i];
ImageOutputStream ios = ImageIO.createImageOutputStream(fOutputFile);
writer.setOutput(ios);
if (frontPage == 1)
{
writer.write(null, new IIOImage(pg1, null, null), param2);
writer.writeInsert(-1, new IIOImage(pg2, null, null), param2);
}
else if (frontPage == 2)
{
writer.write(null, new IIOImage(pg2, null, null), param2);
writer.writeInsert(-1, new IIOImage(pg1, null, null), param2);
}
remaining = remaining - 1;
if (remaining > 0)
System.out.println(remaining + " remaining.");
else
System.out.println("Done.");
它在该部分的第一行引发错误,错误信息为:
Exception in thread "main" java.lang.IllegalArgumentException: vendorName == null!
....rest of stack trace.