调用方法：

                String accessToken = instance();
		System.out.println(accessToken);
		//接口地址
		String iocrurl = "https://aip.baidubce.com/rest/2.0/solution/v1/iocr/recognise";
		//自定义模块templateSign 
		String templateSign = "ed7e75975a4205e4c769b873adc30e67";
		//获取图片的base64数据 先获取图片的数组数据再进行base64 编码
		byte[] imgaebinary;
		try {
			imgaebinary = ImageUtil.readImageFile("/text/test.png");
			String imagebase64 = Base64Util.encode(imgaebinary);
			//拼接接口所需参数 image参数需要urlencode哦
			String param = "image="+URLEncoder.encode(imagebase64,"UTF-8")+"&templateSign="+templateSign;
			//开始请求接口
			String result = BaiDuHttpUtil.post(iocrurl, accessToken, param);
			//输出接口返回的内容
			System.out.println(result);
		} catch (Exception e) {
			e.printStackTrace();
		}

返回数据如下展示：

{
    "data":{
        "isStructured":false,
        "logId":"152471158188325"
    },
    "error_code":2,
    "error_msg":"Service temporarily unavailable"
}