从数据库中取出来的二进制图片改变大小

Question

从数据库中取出来的二进制图片改变大小

Answer 1

import   com.sun.image.codec.jpeg.*;   
  import   java.awt.image.BufferedImage;   
  import   java.awt.image.Kernel;   
  import   java.awt.image.BufferedImageOp;   
  import   java.awt.image.*;   
  添加类成员:   
  private   InputStream       inputStream;   
  private   ByteArrayOutputStream   bout;   
  private   BufferedImage   bufferedImage;   
    
    
  ImageIcon   mi   =   new   ImageIcon("E:\\samples\\java\\SailiTest\\T18Big.gif");   
  this.saveImage(mi.getImage(),"e:\\2.jpg");//存成800*600的图像   
    
  //转换方法   
  public   void   saveImage(Image   pImage,String   ofileDirAndName)   
  {   
      BufferedImage     bimg     =     null;   
      int     w     =     pImage.getWidth(null);   
      int     h     =     pImage.getHeight(null);   
      int     []     pixels     =     new     int[w     *     h];   
      PixelGrabber   pg   =   new   PixelGrabber(pImage,0,   0,   w,   h,pixels,   0,   w);   
      try   {   
        pg.grabPixels();   
      }   
      catch(InterruptedException   e)   {   
    e.printStackTrace();   
        }   
        this.bout=   new   ByteArrayOutputStream();System.out.println("3");   
        System.out.println("图像宽高:"   +w+":"+h   );   
        BufferedImage   bufferedImage=   new   BufferedImage(800,600,BufferedImage.TYPE_INT_RGB);   
    
        bufferedImage.setRGB(0,0,800,600,pixels,0,w);   
        float[]   sharpKernel   =   {   0.0f,   -1.0f,   0.0f,-1.0f,   5.0f,   -1.0f, 0.0f,   -1.0f,   0.0f   };System.out.println("5");   
        BufferedImageOp   sharpen=   new   ConvolveOp(   new   Kernel(3,   3,   sharpKernel),   ConvolveOp.EDGE_NO_OP,   null);   
        BufferedImage   sharp=   sharpen.filter(   bufferedImage,   null   );   
        try   
        {   
          JPEGEncodeParam   jpegParam=   JPEGCodec.getDefaultJPEGEncodeParam(   sharp   );   
          jpegParam.setQuality(   1.0f,   false   );   
          JPEGImageEncoder   jpeg=   JPEGCodec.createJPEGEncoder(   bout,   jpegParam   );   
            jpeg.encode(   bufferedImage   );   
            this.bout.writeTo(new   FileOutputStream(ofileDirAndName));   
      }   
      catch(Exception   ee)   
      {   
  System.err.println("出错了"+ee);   
        }   
  }