package com.zovon.util;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
/**
* 该类是图片处理类
*
* @author 王永丰
* 出处:http://www.cnblogs.com/zovon/p/4345501.html
*/
public final class ImageUtil {
/** 图片格式：JPG */
private static final String PICTRUE_FORMATE_JPG = "jpg";
private ImageUtil() {
}
/**
* 生成组合头像
*
* @param paths
* 用户图像
* @throws IOException
*/
public static void getCombinationOfhead(List<String> paths)
throws IOException {
List<BufferedImage> bufferedImages = new ArrayList<BufferedImage>();
// 压缩图片所有的图片生成尺寸同意的 为 50x50
for (int i = 0; i < paths.size(); i++) {
bufferedImages.add(ImageUtil.resize2(paths.get(i), 50, 50, true));
}
int width = 112; // 这是画板的宽高
int height = 112; // 这是画板的高度
// BufferedImage.TYPE_INT_RGB可以自己定义可查看API
BufferedImage outImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
// 生成画布
Graphics g = outImage.getGraphics();
Graphics2D g2d = (Graphics2D) g;
// 设置背景色
g2d.setBackground(new Color(231,231,231));
// 通过使用当前绘图表面的背景色进行填充来清除指定的矩形。
g2d.clearRect(0, 0, width, height);
// 开始拼凑 根据图片的数量判断该生成那种样式的组合头像目前为4中
int j = 1;
for (int i = 1; i <= bufferedImages.size(); i++) {
if (bufferedImages.size() == 4) {
if (i <= 2) {
g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i
- 50, 4, null);
} else {
g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j
- 50, 58, null);
j++;
}
} else if (bufferedImages.size() == 3) {
if (i <= 1) {
g2d.drawImage(bufferedImages.get(i - 1), 31, 4, null);
} else {
g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j
- 50, 58, null);
j++;
}
} else if (bufferedImages.size() == 2) {
g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i - 50,
31, null);
} else if (bufferedImages.size() == 1) {
g2d.drawImage(bufferedImages.get(i - 1), 31, 31, null);
}
// 需要改变颜色的话在这里绘上颜色。可能会用到AlphaComposite类
}
String outPath = "E:\\b.jpg";
String format = "JPG";
ImageIO.write(outImage, format, new File(outPath));
}
/**
* 图片缩放
*
* @param filePath
* 图片路径
* @param height
* 高度
* @param width
* 宽度
* @param bb
* 比例不对时是否需要补白
*/
public static BufferedImage resize2(String filePath, int height, int width,
boolean bb) {
try {
double ratio = 0; // 缩放比例
File f = new File(filePath);
BufferedImage bi = ImageIO.read(f);
Image itemp = bi.getScaledInstance(width, height,
Image.SCALE_SMOOTH);
// 计算比例
if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
if (bi.getHeight() > bi.getWidth()) {
ratio = (new Integer(height)).doubleValue()
/ bi.getHeight();
} else {
ratio = (new Integer(width)).doubleValue() / bi.getWidth();
}
AffineTransformOp op = new AffineTransformOp(
AffineTransform.getScaleInstance(ratio, ratio), null);
itemp = op.filter(bi, null);
}
if (bb) {
// copyimg(filePath, "D:\\img");
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
if (width == itemp.getWidth(null))
g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
else
g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
g.dispose();
itemp = image;
}
return (BufferedImage) itemp;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
