在java中泄漏圖像處理代碼

我在tomcat服務器上有下面的代碼。目標是以.jpg保存圖像（以字符串形式發送）並創建等效的縮略圖。雖然目標已經實現，但我注意到在每次執行時（甚至在嘗試將幾乎所有使用的變量設置爲「null」之後），服務器memomy增加了6兆字節，永遠不會釋放。由於我有一個非常小的RAM服務器，這確實有問題。順便發送的圖像只有接近30千字節。在java中泄漏圖像處理代碼

public boolean saveImage(String picInString) 
     throws IOException { 
    byte[] bytes = null; 

    try { 
     bytes = Base64.decode(picInString); 
    } catch (Base64DecodingException e) { 
     e.printStackTrace(System.out); 
    } 

    ByteArrayInputStream bis = new ByteArrayInputStream(bytes); 
    Iterator<?> readers = ImageIO.getImageReadersByFormatName("png"); 

    ImageReader reader = (ImageReader) readers.next(); 
    Object source = bis; 
    ImageInputStream iis = ImageIO.createImageInputStream(source); 
    Graphics2D g2 = null; 

    try { 
     reader.setInput(iis, true); 
     ImageReadParam param = reader.getDefaultReadParam(); 

     Image image = reader.read(0, param); 

     // got an image file 
     BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), 
       image.getHeight(null), BufferedImage.TYPE_INT_RGB); 
     // bufferedImage is the RenderedImage to be written 

     g2 = bufferedImage.createGraphics(); 
     g2.drawImage(image, null, null); 

     ImageIO.write(bufferedImage, "jpg", new File("/image.jpg")); 

      ImageIO.write(Scalr.resize(MyImageClass.cropImage(bufferedImage), 100, 100), 
          "jpg", new File("/image_mini.jpg")); 


     bufferedImage.flush(); 
     bufferedImage = null; 

    } catch (Exception e) { 
     e.printStackTrace(System.out); 
    } finally { 
     if (reader != null) { 
      reader.dispose(); 
     } 
     if (g2 != null) { 
      g2.dispose(); 
     } 
     bis.close(); 
     iis.close(); 
     reader = null; 
     bis = null; 
     iis = null; 
    } 

    return false; 
}

任何幫助將不勝感激！

來源

2015-02-06 user3793589