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package cn.edu.hbcit.jsj.accp09.bean;import java.io.IOException;import java.io.PrintWriter;import java.io.*;import java.util.*;import java.awt.*;import java.awt.event.*;import java.awt.image.*;import javax.imageio.*;import com.sun.image.codec.jpeg.*;import org.apache.log4j.Logger;/** * 
Description: 文件操作
 * * 
Copyright: Copyright (c) 2009
 * */public class FileOperate  {	protected final Logger log = Logger.getLogger(FileOperate.class.getName());	public FileOperate() {		// TODO Auto-generated constructor stub	}	/*	 * 生成随机文件名	 */	public String generateRandomFilename(){		String RandomFilename = "";		Random rand = new Random();//生成随机数		int random = rand.nextInt();				Calendar calCurrent = Calendar.getInstance();	    int intDay = calCurrent.get(Calendar.DATE);	    int intMonth = calCurrent.get(Calendar.MONTH) + 1;	    int intYear = calCurrent.get(Calendar.YEAR);	    String now = String.valueOf(intYear) + "_" + String.valueOf(intMonth) + "_" +	        String.valueOf(intDay) + "_";	    log.debug("生成于今日的文件名前缀为："+now);	    	    RandomFilename = now + String.valueOf(random > 0 ? random : ( -1) * random) + ".";	    	    return RandomFilename;	}		/**	 * 删除文件	 * @param fileName	 * @return boolean	 */	public boolean deleteFile(String fileName){		boolean flag = false;		try{			File delFile = new File(fileName);			log.debug("尝试删除："+fileName);			flag = delFile.delete();		}catch(Exception e){			log.error(e);		}	    	    return flag;	}		/**	 * 为图片添加水印	 * @param s 要添加的水印	 * @param ImgName 要修改的图片名称及路径	 * @param bottom 水印距底边的距离	 * @param right 水印距右边的距离	 */	public void imageWatermark(String s,String ImgName, int right, int bottom){ 		try{ 		File _file = new File(ImgName); 		Image src = ImageIO.read(_file); 		File img = new File(s); 		Image imgsrc = ImageIO.read(img); 		int wideth=src.getWidth(null); 		int height=src.getHeight(null); 		BufferedImage image=new BufferedImage(wideth,height,BufferedImage.TYPE_INT_RGB); 		Graphics g=image.createGraphics(); 		g.drawImage(src,0,0,wideth,height,null); 		//String s="要加的水印"; 		g.setColor(Color.LIGHT_GRAY); 				g.setFont(new Font("Britannic Bold",Font.ITALIC,18)); 		//g.setFont(new Font("Arial Black",Font.ITALIC,18)); 		//Font aa=new Font("宋体",Font.PLAIN,20); 		//g.drawString(s,wideth-right,height-bottom);		g.drawImage(imgsrc, wideth-right,height-bottom,null);		g.dispose(); 		FileOutputStream out=new FileOutputStream(ImgName); 		JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); 		encoder.encode(image); 		out.close(); 		} 		catch(Exception e){ 		System.out.println(e); 		} 		} 	}

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