手写作文识别（多模态）

package com.baidu.ai.aip;

import com.baidu.ai.aip.utils.Base64Util;
import com.baidu.ai.aip.utils.FileUtil;
import com.baidu.ai.aip.utils.HttpUtil;
import com.google.gson.Gson;
import java.util.HashMap;
import java.util.Map;

/**
* 作文识别提交请求
*/
public class HandwritingCompositionCreateTask {

    /**
    * 重要提示代码中所需工具类
    * FileUtil,Base64Util,HttpUtil,GsonUtils请从
    * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
    * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
    * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
    * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
    * 下载
    */
    public static String handwritingCompositionCreateTask() {
        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting_composition/create_task";
        try {
            // 本地文件路径
            String filePath = "[本地文件路径]";
            byte[] imgData = FileUtil.readFileByBytes(filePath);
            String imgStr = Base64Util.encode(imgData);

            // 构造请求体
            Map<String, Object> map = new HashMap<>();
            map.put("image", imgStr); // 或者使用 url 参数
            String param = new Gson().toJson(map);

            // 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
            String accessToken = "[调用鉴权接口获取的token]";

            String result = HttpUtil.post(url, accessToken, "application/json", param);
            System.out.println(result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        HandwritingCompositionCreateTask.handwritingCompositionCreateTask();
    }
}

package com.baidu.ai.aip;

import com.baidu.ai.aip.utils.HttpUtil;
import com.google.gson.Gson;

import java.util.HashMap;
import java.util.Map;

/**
* 作文识别获取请求
*/
public class HandwritingCompositionGetResult {

    /**
    * 重要提示代码中所需工具类
    * HttpUtil,GsonUtils请从
    * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
    * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
    * 下载
    */
    public static String handwritingCompositionGetResult() {
        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting_composition/get_result";
        try {
            // task_id 来自提交请求的返回结果
            Map<String, Object> map = new HashMap<>();
            map.put("task_id", "1965376138007096888");
            String param = new Gson().toJson(map);

            String accessToken = "[调用鉴权接口获取的token]";

            String result = HttpUtil.post(url, accessToken, "application/json", param);
            System.out.println(result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        HandwritingCompositionGetResult.handwritingCompositionGetResult();
    }
}



#include <iostream>
#include <curl/curl.h>
#include <string>

const static std::string get_request_url = "https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting_composition/get_result";
static std::string get_result_str;

/**
 * curl发送http请求调用的回调函数
 */
static size_t get_callback(void *ptr, size_t size, size_t nmemb, void *stream) {
    get_result_str = std::string((char *) ptr, size * nmemb);
    return size * nmemb;
}

/**
 * 作文识别 - 获取任务结果
 * @return 调用成功返回0，发生错误返回其他错误码
 */
int handwriting_composition_get_result(std::string &json_result, const std::string &access_token, const std::string &task_id) {
    std::string url = get_request_url + "?access_token=" + access_token;

    CURL *curl = NULL;
    CURLcode result_code;
    int is_success;

    // 构造JSON请求体
    std::string json_body = "{\"task_id\":\"" + task_id + "\"}";

    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_POST, 1L);

        // 设置请求头 Content-Type: application/json
        struct curl_slist *headers = NULL;
        headers = curl_slist_append(headers, "Content-Type: application/json");
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, json_body.c_str());

        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, get_callback);
        result_code = curl_easy_perform(curl);

        if (result_code != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n",
                    curl_easy_strerror(result_code));
            is_success = 1;
        } else {
            json_result = get_result_str;
            is_success = 0;
        }

        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
    } else {
        fprintf(stderr, "curl_easy_init() failed.\n");
        is_success = 1;
    }
    return is_success;
}