用Java打印BufferedImage

Question

有誰知道如何用Java打印BufferedImage？

Answer 1

打印就像在屏幕上繪圖一樣，所以最終你會得到一個Graphics對象，並且你只需將Image繪製到它中。

Answer 2

我不確定你打印的意思。在打印機上打印？打印到標準？寫入文件？

你可以看看這個教程從太陽。如果你想寫一個文件。用你喜歡的圖像工具打開並從那裏打印。

http://download.oracle.com/javase/tutorial/2d/images/saveimage.html

如果你正在構建一個圖形應用程序，並使用AWT一樣東西，你可以使用java打印API這可能需要一些踢踏舞。

Answer 3

我試圖做到這一點通過擴展的BufferedImage實現打印接口像這樣（代碼拼貼我從網上發現身邊）：

package components; 
import java.awt.image.PixelGrabber; 
import javax.swing.*; 
import java.io.*; 
import java.awt.*; 
import java.applet.Applet; 
import javax.imageio.*; 
import java.awt.Image.*; 
import java.awt.image.BufferedImage; 
import java.awt.image.ImageObserver; 
import java.net.*; 
import java.lang.*; 
import java.io.*; 
import java.io.File; 
import java.lang.Integer; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.RenderingHints; 
import java.lang.String; 
import java.io.File; 
import java.util.Iterator; 
import javax.imageio.*; 
import javax.imageio.stream.*; 
import java.lang.ClassLoader.*; 
import java.lang.Class; 
import java.io.*; 
import javax.print.*; 
import javax.print.attribute.*; 
import javax.print.attribute.standard.*; 
import javax.print.attribute.standard.MediaSize.*; 
import javax.print.event.*; 
import java.awt.MediaTracker; 
import java.awt.Color; 
import java.awt.*; 
import java.awt.print.*; 
import javax.print.attribute.*; 
import javax.swing.UIManager; 
import java.awt.image.ColorModel; 
import java.awt.image.WritableRaster; 
import java.util.Hashtable; 
import java.awt.image.IndexColorModel; 
import java.awt.print.Printable.*; 
import java.awt.Rectangle; 
import java.awt.Graphics2D; 

public class printableBufferedImage extends BufferedImage implements Printable 
{ 
    public printableBufferedImage(ColorModel cm, WritableRaster raster, boolean  isRasterPremultiplied, Hashtable properties) 
    { 
     super(cm, raster, isRasterPremultiplied, properties); 
    } 
    public printableBufferedImage(int width, int height, int imageType) 
    { 
     super(width, height, imageType); 
    } 
    public printableBufferedImage(int width, int height, int imageType, IndexColorModel cm) 
    { 
     super(width, height, imageType, cm); 
    } 


public int print(Graphics g, PageFormat pf, int page) throws 
                PrinterException { 

    Graphics2D g2d = (Graphics2D) g; 

    if (page > 0) { /* We have only one page, and 'page' is zero-based */ 
     return NO_SUCH_PAGE; 
    } 

    /* User (0,0) is typically outside the imageable area, so we must 
    * translate by the X and Y values in the PageFormat to avoid clipping 
    */ 

    try 
    { 

    g2d.setClip(0,0,2100,3300); 
    g2d.drawImage(this, 225, 0,null); 
    g2d.drawImage(this,225, 1550,null); 
    } 
    catch(Exception exc) 
    { 
    } 
    /* tell the caller that this page is part of the printed document */ 
     //return NO_SUCH_PAGE; 
    return PAGE_EXISTS; 
} 

public BufferedImage resizeOurImageFromImage(BufferedImage OurImage, int targetWidth, int targetHeight) 
throws Exception 
{ 
    double tempWidth, tempHeight; 
    int w,h,type; 
    Boolean OurImageHasAlpha; 
    OurImageHasAlpha = OurImage.getColorModel().hasAlpha(); 
    if(OurImageHasAlpha) 
    { 
     type = BufferedImage.TYPE_INT_ARGB; 
    } 
    else 
    { 
     type = BufferedImage.TYPE_INT_RGB; 
    } 


    w = OurImage.getWidth(); 
    h = OurImage.getHeight(); 

    if((targetWidth == 0) && (targetHeight != 0)) 
    { 
     targetWidth = (targetHeight * w)/h; 
    } 
    else 
    { 
    if((targetHeight == 0) && (targetWidth != 0)) 
    { 
     targetHeight = (targetWidth * h)/w; 
    } 
    } 

    if((targetHeight == 0) || (targetWidth == 0)) 
    { 
    throw(new Exception("In the Resize Image module with one dimension still zero after trying proportion")); 
    } 
     do 
     { 
      if(w > targetWidth) 
      { 
       tempWidth = ((double) w)/1.2; 
       if (tempWidth < (double) targetWidth) 
       { 
       w = targetWidth; 
       } 
       else 
       { 
       w = (int) java.lang.Math.round(tempWidth + 0.49); 
       } 
      } 
      else 
      { 
      w = targetWidth; 
      } 
      if(h > targetHeight) 
      { 
      tempHeight = ((double) h)/1.2; 
      if (tempHeight < (double) targetHeight) 
      { 
       h = targetHeight; 
      } 
      else 
      { 
       h = (int) java.lang.Math.round(tempHeight + 0.49); 
      } 
      } 
      else 
      { 
      h = targetHeight; 
      } 
      BufferedImage tmp = new BufferedImage(w, h, type); 
      Graphics2D g2 = tmp.createGraphics(); 
      g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC); 
      g2.drawImage(OurImage, 0, 0, w, h, null); 
      g2.dispose(); 
      OurImage = tmp; 
      } while ((targetHeight != h) || (targetWidth != w)); 

    return OurImage; 
} 
}