java将图片二进制数据转换成base64字符串显示到前端

// 二进制转换成base64字符串
	public static String byteArr2String(byte[] byteArr) throws Exception {
		String stringBase64 = null;
		try {
			Base64 encoder = new Base64();
			stringBase64 = (byteArr != null ? encoder.encodeToString(byteArr) : "");
		} catch (Exception e) {
			throw new Exception("byteArr2String转换异常:" + e);
		}
		return stringBase64;
	}

前端展示

<img src='data:image/jpg;base64,#这里放base64字符串#' >