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]);
}

}

以上就是本文的全部内容，希望对大家的学习有所帮助

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