base 64符号化復号ピクチャ

public interface base64Img {
	/***
	 *  base64 
	 * @param imgPath  
	 * @return  
	 */
	public String baseCoding(String imgPath);
	
	
	/***
	 *  base64 
	 * @param imgStr  
	 * 
	 */
	public boolean baseDecoding(String imgStr);

}




import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class base64cdImg implements base64Img {
	

	@Override
	public String baseCoding(String imgPath) {
        InputStream is=null;
        byte [] data=null;
        try {
			is=new FileInputStream(imgPath);
			data=new byte[is.available()];
			is.read(data);
			is.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        BASE64Encoder encoder=new BASE64Encoder();
        
		return encoder.encode(data);
	}

	@Override
	public boolean baseDecoding(String imgStr) {
		if(imgStr==null){
			return false;
		}
		BASE64Decoder decoder=new BASE64Decoder();
		try {
			byte[] b=decoder.decodeBuffer(imgStr);
			for(int i=0;i<b.length;i++)
			{
				 if(b[i]<0)
	                {// 
	                    b[i]+=256;
	                }
			}
			String imgFilePath="F:\\2.jpg";
			OutputStream ot=new FileOutputStream(imgFilePath);
			ot.write(b);
			ot.flush();
			ot.close();
			return true;
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return false;
	}
/**
 * @param args
 */
 public static void main(String[] args) {
 
 //base64cdImg bi=new base64cdImg();
 // 
 //System.out.print(bi.baseCoding("F:\\2.jpg"));
 // 
 //bi.baseDecoding(bi.baseCoding(F:\\2.jpg));


 }


}