java实现图片用Excel画出来

本文实例为大家分享了java用Excel将图片画出来的具体代码，供大家参考，具体内容如下

能够将任何图片在excel上利用单元格背景完整的描绘出来。

像网络上出现的用excel画出超级玛丽等等，各种图片都能在excel上"画"出来。

图片我没有经过特殊处理，所以转换的图片不能太大，有多大的图片就要有多少的单元格。如640*480就有307200的单元格。

如要转换的图片：

转换后在excel中的效果：

没多大意义练练手:

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Locale;

import javax.swing.ImageIcon;

import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.format.Colour;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

public class Helper {
 private BufferedImage getBufferedImage(String filepath)
 {
 ImageIcon imgicon=new ImageIcon(filepath);
 BufferedImage bufferedImage = new BufferedImage(imgicon.getIconWidth(),imgicon.getIconHeight(),BufferedImage.TYPE_INT_RGB);  

 bufferedImage.createGraphics().drawImage(imgicon.getImage(), 0, 0,null);
 return bufferedImage;

 }

 private Colour getNearestColour(Color awtColor) {
  Colour color = null;
  Colour[] colors = Colour.getAllColours();
  if ((colors != null) && (colors.length > 0)) {
  Colour crtColor = null;
  int[] rgb = null;
  int diff = 0;
  int minDiff = 999; 

  for (int i = 0; i < colors.length; i++) {
  crtColor = colors[i];
  rgb = new int[3];
  rgb[0] = crtColor.getDefaultRGB().getRed();
  rgb[1] = crtColor.getDefaultRGB().getGreen();
  rgb[2] = crtColor.getDefaultRGB().getBlue(); 

  diff = Math.abs(rgb[0] - awtColor.getRed())
   + Math.abs(rgb[1] - awtColor.getGreen())
   + Math.abs(rgb[2] - awtColor.getBlue()); 

  if (diff < minDiff) {
   minDiff = diff;
   color = crtColor;
  }
  }
  }
  if (color == null)
  color = Colour.BLACK;
  return color;
  }
 public void exec(String convertFromImage,String createxls) throws Exception
 {

 WorkbookSettings ws = new WorkbookSettings();
  ws.setLocale(new Locale("en", "EN"));
  WritableWorkbook workbook = Workbook.createWorkbook(new File(createxls), ws);
  WritableSheet s2 = workbook.createSheet("picture", 0);
  BufferedImage buffimage= getBufferedImage(convertFromImage);
  int width=buffimage.getWidth();
  int heigh=buffimage.getHeight();
  for(int i=0;i<width;i++)
  {
   for(int h=0;h<heigh;h++)
  {
    WritableCellFormat greyBackground = new WritableCellFormat();
    Color c = new Color(buffimage.getRGB(i, h)); 

  greyBackground.setBackground( getNearestColour(c) );

  Label lr = new Label(i, h, "", greyBackground);

  s2.addCell(lr);
  }

  }

  //写入Excel对象
  workbook.write(); 

  workbook.close();

 }
 /**
 * @param args
 * @throws IOException
 * @throws BiffException
 */
 public static void main(String[] args) throws Exception {
 Helper helper=new Helper();

 System.out.println("输入的图片："+args[0]);
 System.out.println("输出的excel："+args[1]);
 System.out.println("转换开始");
 //转换执行的方法参数 args[0]输入的图片路径 args[1]输出的excel路径
// helper.exec( "mslogo.jpg","1.xls");
 helper.exec(args[0],args[1]);
 }

}

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