java处理图形文件

package com.xxx.utility; 

/** *//******************************************************************************* 
* <p>Title: xxx </p> 
* <p>Description: xxx </p> 
* <p>Copyright: Copyright (c) 2006 DavidHsing All Rights Reserved </p> 
* <p>Company: xxx </p> 
* <p>WebSite: http://blog.csdn.net/DavidHsing </p> 
* 
* @author  : DavidHsing <DavidHsing(At)163.com> 
* @version  : 1.00 
* @date    : 2006-11-30 
* @direction: 图像格式转换类(转换时不需要关心源图的格式) 
* @support  : GIF(no compressed encoding), JPEG, TIFF, PNG, PICT, BMP, Targa, ICO, CUR, XBM, XPM, PCX, DCX 
******************************************************************************/ 

import com.sun.jimi.core.*; 
import com.sun.jimi.core.options.*; 
import java.awt.image.*; 
import java.io.*; 

//****************************************************************************** 


public class JimiImage 
...{ 
    //public JimiImage() {} 

    //========================================================================== 

    /** *//** 
    * 转换图像格式为 JPG 
    * @param    String : sSourceImage, 其它格式的源图像文件路径 
    * @param    String : sDestImage, 目标 JPG 图像文件存放路径 
    * @param    int    : nQuality, 品质, 0-100, 数值越高品质越好 
    * @return  boolean 
    */ 
    public boolean convertToJPG(String sSourceImage, String sDestImage, int nQuality) 
    ...{ 
        if (sSourceImage == null || sSourceImage.trim().equals("")) 
        ...{ 
            System.out.println(" @> JimiImage.convertToJPG() : 要转换的源图像文件路径不能为空！"); 
            return false; 
        } 

        if (sDestImage == null || sDestImage.trim().equals("")) 
        ...{ 
            sDestImage = sSourceImage.substring(0, sSourceImage.lastIndexOf(".")) + ".jpg"; 
        } 
        else if (!sDestImage.endsWith(".jpg")) 
        ...{ 
            sDestImage += ".jpg"; 
        } 

        //---------------------------------------------------------------------- 

        //检查源图像文件 
        File tSourceImageFile = new File(sSourceImage); 
        if (!tSourceImageFile.exists()) 
        ...{