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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