package?com.yjf.image;

import?java.awt.AlphaComposite;
import?java.awt.Color;
import?java.awt.Font;
import?java.awt.Graphics2D;
import?java.awt.Image;
import?java.awt.RenderingHints;
import?java.awt.geom.AffineTransform;
import?java.awt.image.BufferedImage;
import?java.awt.image.ColorModel;
import?java.awt.image.WritableRaster;
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?javax.imageio.ImageIO;

import?com.sun.image.codec.jpeg.ImageFormatException;
import?com.sun.image.codec.jpeg.JPEGCodec;
import?com.sun.image.codec.jpeg.JPEGImageDecoder;
import?com.sun.image.codec.jpeg.JPEGImageEncoder;

/**
?*?圖片工具類，主要針對圖片水印處理
?*?
?*?@author??025079
?*?@version??[版本號?2011-11-28]
?*?@see??[相關類/方法]
?*?@since??[產品/模塊版本]
?*/
public?class?ImageHelper?{

	//?項目根目錄路徑
	public?static?final?String?path?=?System.getProperty（“user.dir“）;
	
	/**
	?*?生成縮略圖?

	?*?保存:ImageIO.write（BufferedImage?imgType[jpg/png/...]?File）;
	?*?
	?*?@param?source
	?*????????????原圖片
	?*?@param?width
	?*????????????縮略圖寬
	?*?@param?height
	?*????????????縮略圖高
	?*?@param?b
	?*????????????是否等比縮放
	?*?*/
	public?static?BufferedImage?thumb（BufferedImage?source?int?width
			int?height?boolean?b）?{
		//?targetW，targetH分別表示目標長和寬
		int?type?=?source.getType（）;
		BufferedImage?target?=?null;
		double?sx?=?（double）?width?/?source.getWidth（）;
		double?sy?=?（double）?height?/?source.getHeight（）;

		if?（b）?{
			if?（sx?>?sy）?{
				sx?=?sy;
				width?=?（int）?（sx?*?source.getWidth（））;
			}?else?{
				sy?=?sx;
				height?=?（int）?（sy?*?source.getHeight（））;
			}
		}

		if?（type?==?BufferedImage.TYPE_CUSTOM）?{?//?handmade
			ColorModel?cm?=?source.getColorModel（）;
			WritableRaster?raster?=?cm.createCompatibleWritableRaster（width
					height）;
			boolean?alphaPremultiplied?=?cm.isAlphaPremultiplied（）;
			target?=?new?BufferedImage（cm?raster?alphaPremultiplied?null）;
		}?else
			target?=?new?BufferedImage（width?height?type）;
		Graphics2D?g?=?target.createGraphics（）;
		//?smoother?than?exlax:
		g.setRenderingHint（RenderingHints.KEY_RENDERING
				RenderingHints.VALUE_RENDER_QUALITY）;
		g.drawRenderedImage（source?AffineTransform.getScaleInstance（sx?sy））;
		g.dispose（）;
		return?target;
	}

	/**
	?*?圖片水印
	?*?
	?*?@param?imgPath
	?*????????????待處理圖片
	?*?@param?markPath
	?*????????????水印圖片
	?*?@param?x
	?*????????????水印位于圖片左上角的?x?坐標值
	?*?@param?y
	?*????????????水印位于圖片左上角的?y?坐標值
	?*?@param?alpha
	?*????????????水印透明度?0.1f?~?1.0f
	?*?*/
	public?static?void?waterMark（String?imgPath?String?markPath?int?x?int?y
			float?alpha）?{
		try?{
			//?加載待處理圖片文件
			Image?img?=?ImageIO.read（new?File（imgPath））;

			BufferedImage?image?=?new?BufferedImage（img.getWidth（null）
					img.getHeight（null）?BufferedImage.TYPE_INT_RGB）;
			Graphics2D?g?=?image.createGraphics（）;
			g.drawImage（img?0?0?null）;

			//?加載水印圖片文件
			Image?src_biao?=?ImageIO.read（new?File（markPath））;
			g.setCo

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-11-29?09:03??SimilarImageSearch\
?????文件?????????548??2011-11-28?19:46??SimilarImageSearch\.classpath
?????文件?????????394??2011-11-28?19:43??SimilarImageSearch\.project
?????目錄???????????0??2011-11-29?09:03??SimilarImageSearch\.settings\
?????文件?????????629??2011-11-28?19:43??SimilarImageSearch\.settings\org.eclipse.jdt.core.prefs
?????目錄???????????0??2011-12-24?15:24??SimilarImageSearch\bin\
?????目錄???????????0??2012-04-17?13:10??SimilarImageSearch\bin\com\
?????目錄???????????0??2012-04-17?13:29??SimilarImageSearch\bin\com\yjf\
?????目錄???????????0??2012-04-17?13:29??SimilarImageSearch\bin\com\yjf\image\
?????文件????????6239??2012-04-17?13:29??SimilarImageSearch\bin\com\yjf\image\ImageHelper.class
?????文件????????4084??2012-04-17?13:29??SimilarImageSearch\bin\com\yjf\image\SimilarImageSearch.class
?????文件?????????279??2012-04-17?13:33??SimilarImageSearch\bin\readme.txt
?????目錄???????????0??2011-11-29?14:05??SimilarImageSearch\images\
?????文件???????47657??2011-09-15?14:10??SimilarImageSearch\images\example1.jpg
?????文件????????8434??2011-11-29?13:51??SimilarImageSearch\images\example2.jpg
?????文件???????28065??2012-04-17?13:21??SimilarImageSearch\images\example3.jpg
?????文件???????24759??2011-11-29?13:53??SimilarImageSearch\images\example4.jpg
?????文件???????40815??2011-11-29?13:51??SimilarImageSearch\images\example5.jpg
?????文件???????11837??2012-04-17?13:31??SimilarImageSearch\images\example6.jpg
?????文件???????63859??2011-11-29?13:59??SimilarImageSearch\images\source.jpg
?????目錄???????????0??2011-11-29?09:03??SimilarImageSearch\src\
?????目錄???????????0??2011-11-29?09:03??SimilarImageSearch\src\com\
?????目錄???????????0??2012-04-17?13:29??SimilarImageSearch\src\com\yjf\
?????目錄???????????0??2011-11-29?09:03??SimilarImageSearch\src\com\yjf\image\
?????文件????????6431??2012-04-17?13:29??SimilarImageSearch\src\com\yjf\image\ImageHelper.java
?????文件????????4583??2012-04-17?13:29??SimilarImageSearch\src\com\yjf\image\SimilarImageSearch.java
?????文件?????????279??2012-04-17?13:33??SimilarImageSearch\src\readme.txt