安卓传图片到java端怎么接收接收

String pic=request.getParameter("picture");//安桌端base64过来的字段
		try {
			byte[] bytes1= Base64Coder.decodeLines(pic);
	        ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);    
	        BufferedImage bi1 =ImageIO.read(bais);
	      
			String savepath="c:/1.jpg";
			File w2 = new File(savepath);//可以是jpg,png,gif格式    
			ImageIO.write(bi1, "jpg", w2);
	    } catch (IOException e) {    
	        e.printStackTrace();    
	    }