图像调整大小Java

Question

我有一个奇怪的问题，调整图像大小，无法弄清楚我做错了什么。我读过很多职位wwhich基本上有相同的代码，因为我的：

（我用的是Java库Scalr）

File image = new File("myimage.png"); 
File smallImage = new File("myimage_s"); 
try { 
    BufferedImage bufimage = ImageIO.read(image); 

    BufferedImage bISmallImage = Scalr.resize(bufimage, 30); // after this line my dimensions in bISmallImage are correct! 
    ImageIO.write(bISmallImage, "png", smallImage); // but my smallImage has the same dimension as the original foto 
} catch (Exception e) {} 

谁能告诉我什么，我做错了什么？

Answer 1

我没有看到你的代码有什么问题。

我把它开进在Eclipse中快速测试项目针对Java SE 7中，并使用imgscalr 4.2在Windows 7专业版64位：

import java.awt.image.BufferedImage; 
import java.io.File; 

import javax.imageio.ImageIO; 

import org.imgscalr.Scalr; 

public class ScalrTest { 

    public static void main(String[] args) { 
     File image = new File("myimage.png"); 
     File smallImage = new File("myimage_s.png"); // FORNOW: added the file extension just to check the result a bit more easily 
     // FORNOW: added print statements just to be doubly sure where we're reading from and writing to 
     System.out.println(image.getAbsolutePath()); 
     System.out.println(smallImage.getAbsolutePath()); 
     try { 
      BufferedImage bufimage = ImageIO.read(image); 

      BufferedImage bISmallImage = Scalr.resize(bufimage, 30); // after this line my dimensions in bISmallImage are correct! 
      ImageIO.write(bISmallImage, "png", smallImage); // but my smallImage has the same dimension as the original foto 
     } catch (Exception e) { 
      System.out.println(e.getMessage()); // FORNOW: added just to be sure 
     } 
    } 

} 

用下面myimage.png ...

...，它生产了以下产品myimage_s.png：

也许有一个环境问题妨碍了你的代码，但想到的可能性会带来明显的错误。