base64图片实现文件上传

public class Base64Util {
	/**
	 * @Description: 将base64编码字符串转换为图片
	 * @Author:
	 * @CreateTime:
	 * @param imgStr
	 *            base64编码字符串
	 * @param path
	 *            图片路径-具体到文件
	 * @return
	 */
	public static boolean generateImage(String imgStr, String path) {
		if (imgStr == null)
		return false;
		BASE64Decoder decoder = new BASE64Decoder();
		
		try {
			// 解密
				byte[] b = decoder.decodeBuffer(imgStr);
				// 处理数据
			for (int i = 0; i < b.length; ++i) {
			if (b[i] < 0) {
			b[i] += 256;
			}
			}
			OutputStream out = new FileOutputStream(path);
			out.write(b);
			out.flush();
			out.close();
			return true;
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return false;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return false;
		}
		
	}

	/**
	 * @Description: 根据图片地址转换为base64编码字符串
	 * @Author:
	 * @CreateTime:
	 * @return
	 */
	public static String getImageStr(String imgFile) {
		InputStream inputStream = null;
		byte[] data = null;
		try {
			inputStream = new FileInputStream(imgFile);
			data = new byte[inputStream.available()];
			inputStream.read(data);
			inputStream.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// 加密
		BASE64Encoder encoder = new BASE64Encoder();
		return encoder.encode(data);
	}
	
	/**
	 * 测试
	 */
	public static void main(String[] args) {
	    String strImg = getImageStr("E:/捕获.PNG");
	    System.out.println(strImg);
	    generateImage(strImg, "E:/捕获(1).PNG");
	}
}