PictureHelper.java
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package org.theyeasy.weixin.util;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.regex.Pattern;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
public class PictureHelper {
/**
* 将图片转化为透明底
* @param path
*/
public static void convertTransparent(String path) {
// TODO Auto-generated constructor stub
try {
BufferedImage image = ImageIO.read(new File(path));
ImageIcon imageIcon = new ImageIcon(image);
BufferedImage bufferedImage = new BufferedImage(
imageIcon.getIconWidth(), imageIcon.getIconHeight(),
BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g2D = (Graphics2D) bufferedImage.getGraphics();
g2D.drawImage(imageIcon.getImage(), 0, 0,
imageIcon.getImageObserver());
int alpha = 0;
for (int j1 = bufferedImage.getMinY(); j1 < bufferedImage
.getHeight(); j1++) {
for (int j2 = bufferedImage.getMinX(); j2 < bufferedImage
.getWidth(); j2++) {
int rgb = bufferedImage.getRGB(j2, j1);
if (colorInRange(rgb))
alpha = 0;
else
alpha = 255;
rgb = (alpha << 24) | (rgb & 0x00ffffff);
bufferedImage.setRGB(j2, j1, rgb);
}
}
g2D.drawImage(bufferedImage, 0, 0, imageIcon.getImageObserver());
// 生成图片为PNG
String outFile = path.substring(0, path.lastIndexOf("."));
ImageIO.write(bufferedImage, "png", new File(outFile + ".png"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static boolean colorInRange(int color) {
int red = (color & 0xff0000) >> 16;
int green = (color & 0x00ff00) >> 8;
int blue = (color & 0x0000ff);
if (red >= color_range && green >= color_range && blue >= color_range)
return true;
return false;
}
public static int color_range = 210;
public static Pattern pattern = Pattern.compile("[0-9]*");
public static boolean isNo(String str) {
return pattern.matcher(str).matches();
}
/**
* @param args
*/
public static void main(String[] args) {
convertTransparent("c:\\22.png");
System.out.println("ok");
String path = JOptionPane.showInputDialog(null, "请输入图片目录");
if (path == null || !new File(path).isDirectory()) {
JOptionPane.showMessageDialog(null, "输入目录有误！");
return;
}
String color = JOptionPane.showInputDialog(null, "请输入色差范围0~255(建议10~50)");
if (isNo(color)) {
color_range = 255 - Integer.parseInt(color);
File file = new File(path);
String[] files = file.list();
for (int i = 0; i < files.length; i++) {
String ext = files[i].substring(files[i].lastIndexOf(".") + 1);
if (ext.equals("jpg")) {
convertTransparent(path + "//" + files[i]);
}
}
JOptionPane.showMessageDialog(null, "转换完成！");
} else {
JOptionPane.showMessageDialog(null, "输入的数字有误！");
}
}
}