我正在尝试编写一个拍摄图像的方法,并保存该图像的100 x 100缩略图.但是,当我保存文件时,它是一个不可读的0字节图像(错误解释“错误解释JPEG图像文件(在状态200中对JPEG库的错误调用)”)在Ubuntu的
ImageViewer中.我的代码如下：
public boolean scale(){
String file = filename.substring(filename.lastIndexOf(File.separator)+1);
File out = new File("data"+File.separator+"thumbnails"+File.separator+file);
if( out.exists() ) return false;
BufferedImage bi;
try{
bi = ImageIO.read(new File(filename));
}
catch(IOException e){
return false;
}
Dimension imgSize = new Dimension(bi.getWidth(),bi.getHeight());
Dimension bounds = new Dimension(100,100);
int newHeight = imgSize.height;
int newWidth = imgSize.width;
if( imgSize.width > bounds.width ){
newWidth = bounds.width;
newHeight = (newWidth*imgSize.height)/imgSize.width;
}
if( imgSize.height > bounds.width ){
newHeight = bounds.height;
newWidth = (newHeight*imgSize.width)/imgSize.height;
}
Image img = bi.getScaledInstance(newWidth,newHeight,BufferedImage.SCALE_SMOOTH);
BufferedImage thumb = new BufferedImage(newWidth,BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g2d = thumb.createGraphics();
g2d.drawImage(img,null);
g2d.dispose();
try{
ImageIO.write(thumb,"jpg",out);
}
catch(IOException e){
return false;
}
return true;
}
其中“filename”是容纳此方法的类的全局变量,表示原始图像的路径.我的主要问题是我不明白为什么我要创建一个0字节的图像.
