package?enterprise.celerity.ac.util;

import?java.awt.AlphaComposite;
import?java.awt.Graphics2D;
import?java.awt.Image;
import?java.awt.image.BufferedImage;
import?java.io.File;
import?java.io.FileOutputStream;

import?javax.imageio.ImageIO;

import?org.apache.log4j.Logger;

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

/**
?*?
This?is?about?CompressPicUtil.java.
?*
?*?@version?V1.0
?*/

public?class?CompressPicUtil?{
	protected?static?final?Logger?logger?=?Logger.getLogger（CompressPicUtil.class）;
	private?static?Image?img;
	
	/**
	?*?等比例壓縮算法（原尺寸壓縮）
	?*?@param?filesrc?原圖地址
	?*?@param?outsrc?縮略圖地址
	?*/
	
	public?static?void?composePic（String?filesrcString?outsrc）?{??
	????try?{??
	????????File?bgfile?=?new?File（filesrc）;??
	????????Image?bg_src?=?javax.imageio.ImageIO.read（bgfile）;??
	??????????
	????????img?=?ImageIO.read（bgfile）;??????//?構造Image對象??
	????????int?width?=?img.getWidth（null）;????//?得到源圖寬??
	????????int?height?=?img.getHeight（null）;??//?得到源圖長??
	????????
	????????int?bg_width?=width;
	????????int?bg_height?=height;
	??
	????????BufferedImage?tag?=?new?BufferedImage（bg_width?bg_height?BufferedImage.TYPE_INT_RGB）;??
	??????????
	????????Graphics2D?g2d?=?tag.createGraphics（）;??
	????????g2d.drawImage（bg_src?0?0?bg_width?bg_height?null）;??
	??????????
	????????g2d.setComposite（AlphaComposite.getInstance（AlphaComposite.SRC_ATOP1.0f））;?//透明度設置開始????
	????????g2d.setComposite（AlphaComposite.getInstance（AlphaComposite.SRC_OVER））;?//透明度設置?結束??
	??????????
	????????FileOutputStream?out?=?new?FileOutputStream（outsrc）;??
	????????JPE