我需要将 a 写BufferedImage
为 .png 而不执行压缩。我环顾四周,并提出以下代码。
public void save(String outFilePath) throws IOException {
Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("png");
ImageWriter writer = iter.next();
File file = new File(outFilePath);
ImageOutputStream ios = ImageIO.createImageOutputStream(file);
writer.setOutput(ios);
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(1.0f);
IIOImage image = new IIOImage(mapImage, null, null);
writer.write(null, image, iwp);
writer.dispose();
//ImageIO.write(mapImage, "png", file);
}
这是抛出的异常。
Exception in thread "main" java.lang.UnsupportedOperationException: Compression not supported.
at javax.imageio.ImageWriteParam.setCompressionMode(Unknown Source)
at Map.MapTransformer.save(MapTransformer.java:246)
at Map.MapTransformer.main(MapTransformer.java:263)