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

{

for(int h=0;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，也希望大家多多支持我们。

时间： 2020-03-16