标签：return String http new org 手写体 import 读光 OCR

读光 手写体OCR 免费调用

• 读光ocr在线体验
• • 打开控制台
  • 获取签名的js方法

读光ocr在线体验

打开控制台

打开js文件美化观看

大概在如图所示行，有一个变量计算d,这个就是签名

获取签名的js方法

并赋给一个js变量,这里我把这个存成文件方便java读取
dgSign.js

var getSign = function i(e) {
    function t(e, t) {
        return e << t | e >>> 32 - t
    }
    function n(e, t) {
        var n = 2147483648 & e
            , r = 2147483648 & t
            , o = 1073741824 & e
            , a = 1073741824 & t
            , i = (1073741823 & e) + (1073741823 & t);
        return o & a ? 2147483648 ^ i ^ n ^ r : o | a ? 1073741824 & i ? 3221225472 ^ i ^ n ^ r : 1073741824 ^ i ^ n ^ r : i ^ n ^ r
    }
    function r(e, t, n) {
        return e & t | ~e & n
    }
    function o(e, t, n) {
        return e & n | t & ~n
    }
    function a(e, t, n) {
        return e ^ t ^ n
    }
    function i(e, t, n) {
        return t ^ (e | ~n)
    }
    function c(e, o, a, i, c, s, l) {
        return e = n(e, n(n(r(o, a, i), c), l)),
            n(t(e, s), o)
    }
    function s(e, r, a, i, c, s, l) {
        return e = n(e, n(n(o(r, a, i), c), l)),
            n(t(e, s), r)
    }
    function l(e, r, o, i, c, s, l) {
        return e = n(e, n(n(a(r, o, i), c), l)),
            n(t(e, s), r)
    }
    function u(e, r, o, a, c, s, l) {
        return e = n(e, n(n(i(r, o, a), c), l)),
            n(t(e, s), r)
    }
    function f(e) {
        var t = ""
            , n = ""
            , r = void 0
            , o = void 0;
        for (o = 0; o <= 3; o++)
            r = e >>> 8 * o & 255,
                n = "0" + r.toString(16),
                t += n.substr(n.length - 2, 2);
        return t
    }
    var d = []
        , p = void 0
        , h = void 0
        , m = void 0
        , v = void 0
        , y = void 0
        , g = void 0
        , b = void 0
        , w = void 0
        , x = void 0;
    for (e = function (e) {
        e = e.replace(/\r\n/g, "\n");
        for (var t = "", n = 0; n < e.length; n++) {
            var r = e.charCodeAt(n);
            r < 128 ? t += String.fromCharCode(r) : r > 127 && r < 2048 ? (t += String.fromCharCode(r >> 6 | 192),
                t += String.fromCharCode(63 & r | 128)) : (t += String.fromCharCode(r >> 12 | 224),
                    t += String.fromCharCode(r >> 6 & 63 | 128),
                    t += String.fromCharCode(63 & r | 128))
        }
        return t
    }(e),
        d = function (e) {
            for (var t = void 0, n = e.length, r = n + 8, o = (r - r % 64) / 64, a = 16 * (o + 1), i = new Array(a - 1), c = 0, s = 0; s < n;)
                t = (s - s % 4) / 4,
                    c = s % 4 * 8,
                    i[t] |= e.charCodeAt(s) << c,
                    s += 1;
            return t = (s - s % 4) / 4,
                c = s % 4 * 8,
                i[t] |= 128 << c,
                i[a - 2] = n << 3,
                i[a - 1] = n >>> 29,
                i
        }(e),
        g = 1732584193,
        b = 4023233417,
        w = 2562383102,
        x = 271733878,
        p = 0; p < d.length; p += 16)
        h = g,
            m = b,
            v = w,
            y = x,
            g = c(g, b, w, x, d[p + 0], 7, 3614090360),
            x = c(x, g, b, w, d[p + 1], 12, 3905402710),
            w = c(w, x, g, b, d[p + 2], 17, 606105819),
            b = c(b, w, x, g, d[p + 3], 22, 3250441966),
            g = c(g, b, w, x, d[p + 4], 7, 4118548399),
            x = c(x, g, b, w, d[p + 5], 12, 1200080426),
            w = c(w, x, g, b, d[p + 6], 17, 2821735955),
            b = c(b, w, x, g, d[p + 7], 22, 4249261313),
            g = c(g, b, w, x, d[p + 8], 7, 1770035416),
            x = c(x, g, b, w, d[p + 9], 12, 2336552879),
            w = c(w, x, g, b, d[p + 10], 17, 4294925233),
            b = c(b, w, x, g, d[p + 11], 22, 2304563134),
            g = c(g, b, w, x, d[p + 12], 7, 1804603682),
            x = c(x, g, b, w, d[p + 13], 12, 4254626195),
            w = c(w, x, g, b, d[p + 14], 17, 2792965006),
            b = c(b, w, x, g, d[p + 15], 22, 1236535329),
            g = s(g, b, w, x, d[p + 1], 5, 4129170786),
            x = s(x, g, b, w, d[p + 6], 9, 3225465664),
            w = s(w, x, g, b, d[p + 11], 14, 643717713),
            b = s(b, w, x, g, d[p + 0], 20, 3921069994),
            g = s(g, b, w, x, d[p + 5], 5, 3593408605),
            x = s(x, g, b, w, d[p + 10], 9, 38016083),
            w = s(w, x, g, b, d[p + 15], 14, 3634488961),
            b = s(b, w, x, g, d[p + 4], 20, 3889429448),
            g = s(g, b, w, x, d[p + 9], 5, 568446438),
            x = s(x, g, b, w, d[p + 14], 9, 3275163606),
            w = s(w, x, g, b, d[p + 3], 14, 4107603335),
            b = s(b, w, x, g, d[p + 8], 20, 1163531501),
            g = s(g, b, w, x, d[p + 13], 5, 2850285829),
            x = s(x, g, b, w, d[p + 2], 9, 4243563512),
            w = s(w, x, g, b, d[p + 7], 14, 1735328473),
            b = s(b, w, x, g, d[p + 12], 20, 2368359562),
            g = l(g, b, w, x, d[p + 5], 4, 4294588738),
            x = l(x, g, b, w, d[p + 8], 11, 2272392833),
            w = l(w, x, g, b, d[p + 11], 16, 1839030562),
            b = l(b, w, x, g, d[p + 14], 23, 4259657740),
            g = l(g, b, w, x, d[p + 1], 4, 2763975236),
            x = l(x, g, b, w, d[p + 4], 11, 1272893353),
            w = l(w, x, g, b, d[p + 7], 16, 4139469664),
            b = l(b, w, x, g, d[p + 10], 23, 3200236656),
            g = l(g, b, w, x, d[p + 13], 4, 681279174),
            x = l(x, g, b, w, d[p + 0], 11, 3936430074),
            w = l(w, x, g, b, d[p + 3], 16, 3572445317),
            b = l(b, w, x, g, d[p + 6], 23, 76029189),
            g = l(g, b, w, x, d[p + 9], 4, 3654602809),
            x = l(x, g, b, w, d[p + 12], 11, 3873151461),
            w = l(w, x, g, b, d[p + 15], 16, 530742520),
            b = l(b, w, x, g, d[p + 2], 23, 3299628645),
            g = u(g, b, w, x, d[p + 0], 6, 4096336452),
            x = u(x, g, b, w, d[p + 7], 10, 1126891415),
            w = u(w, x, g, b, d[p + 14], 15, 2878612391),
            b = u(b, w, x, g, d[p + 5], 21, 4237533241),
            g = u(g, b, w, x, d[p + 12], 6, 1700485571),
            x = u(x, g, b, w, d[p + 3], 10, 2399980690),
            w = u(w, x, g, b, d[p + 10], 15, 4293915773),
            b = u(b, w, x, g, d[p + 1], 21, 2240044497),
            g = u(g, b, w, x, d[p + 8], 6, 1873313359),
            x = u(x, g, b, w, d[p + 15], 10, 4264355552),
            w = u(w, x, g, b, d[p + 6], 15, 2734768916),
            b = u(b, w, x, g, d[p + 13], 21, 1309151649),
            g = u(g, b, w, x, d[p + 4], 6, 4149444226),
            x = u(x, g, b, w, d[p + 11], 10, 3174756917),
            w = u(w, x, g, b, d[p + 2], 15, 718787259),
            b = u(b, w, x, g, d[p + 9], 21, 3951481745),
            g = n(g, h),
            b = n(b, m),
            w = n(w, v),
            x = n(x, y);
    return (f(g) + f(b) + f(w) + f(x)).toLowerCase()
}
getSign("%s");

手写题接口调用
POST https://duguang.aliyun.com/ocrdemo/ocrDemoSecondService.json
Content-Type: application/x-www-form-urlencoded
表单方式提交 这里我选的是本地图片，如果选择网络路径的话，则把img缓存url:图片地址

到这就能自由使用了，下面是通过spring restTemplate调用

package test;

import io.cqxa.util.Base64Utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpHost;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Optional;
import java.util.concurrent.TimeUnit;

/**
 * @author 任勇
 * @date 2021-10-25 18:45:13
 * @description ocr文字识别 工具类
 */
@Slf4j
public class OcrServiceImpl {
    /**
     * js引擎
     */
    private static ScriptEngine se = (new ScriptEngineManager()).getEngineByName("js");
    /**
     * 获取restTemplate，https跳过ssl校验
     * @param
     * @return
     * @author 任勇 on 2021/10/23 15:08
     */
    public RestTemplate restTemplate(){
        // 长连接保持时长5分钟
        PoolingHttpClientConnectionManager pollingConnectionManager = new PoolingHttpClientConnectionManager(200, TimeUnit.SECONDS);
        // 最大连接数
        pollingConnectionManager.setMaxTotal(3000);
        // 单路由的并发数
        pollingConnectionManager.setDefaultMaxPerRoute(100);
        HttpClientBuilder httpClientBuilder = HttpClients.custom();
        httpClientBuilder.setConnectionManager(pollingConnectionManager);
        // 重试次数2次，并开启
        httpClientBuilder.setRetryHandler(new DefaultHttpRequestRetryHandler(2,true));
        // 保持长连接配置，需要在头添加Keep-Alive
        httpClientBuilder.setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy());
        HttpClient httpClient = httpClientBuilder.
        		//由于我是内网开发需要配置代理，如不需要可以不设置
                setProxy(new HttpHost("保密", 保密, "http"))
                .build();
        // httpClient连接底层配置clientHttpRequestFactory
        HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory(httpClient);
        clientHttpRequestFactory.setReadTimeout(120*1000);
        clientHttpRequestFactory.setConnectTimeout(120*1000);
        RestTemplate restTemplate = new RestTemplate(clientHttpRequestFactory);
        return restTemplate;
    }
    /**
     * 读光ocr手写体识别
     * @param imgFilePath
     * @return
     * @author 任勇 on 2021/10/25 8:51
     */
    public String handwritingRecognition(String imgFilePath){
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);
        MultiValueMap<String, String> body = new LinkedMultiValueMap<>(3);
        String base64 = Base64Utils.imageToBase64(imgFilePath);
        body.add("type","demo_shouxie");
        body.add("img",base64);
        body.add("sign",getSign(base64));
        HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(body, httpHeaders);
        //手写体识别
        String url = "http://duguang.aliyun.com/ocrdemo/ocrDemoSecondService.json";
        try {
            RestTemplate restTemplate = restTemplate();
            ResponseEntity<com.alibaba.fastjson.JSONObject> jsonObjectResponseEntity = restTemplate.postForEntity(url, request, com.alibaba.fastjson.JSONObject.class);
            com.alibaba.fastjson.JSONObject jsonObject = jsonObjectResponseEntity.getBody();
            return Optional.ofNullable(jsonObject.getJSONObject("data"))
                    .map(jsonObjectTemp -> jsonObjectTemp.getString("content"))
                    .orElse(null);
        }catch (Exception e){
            e.printStackTrace();
            log.error(e.getMessage());
        }
        return null;

    }
    /**
     * 根据base64计算签名
     * 加载js文件，替换要加密的串，执行获取结果
     * @param baseCode64
     * @return
     * @author 任勇 on 2021/10/24 16:31
     */
    public static String getSign(String baseCode64){
        //这段可替换为其他工具类方法读取文本里全部内容，因为我这用的springboot，所以资源放在了static/下
        String signStr = null;
        try (InputStream is = OcrServiceImpl.class.getClassLoader().getResourceAsStream("static/dgSign.js")){
            byte[] filecontent = new byte[is.available()];
            is.read(filecontent);
            signStr = new String(filecontent, StandardCharsets.UTF_8);
        }catch (Exception e){
            e.printStackTrace();
            log.error(e.getMessage());
        }
        if(StringUtils.isEmpty(signStr)){
            return null;
        }
        signStr = signStr.replace("%s",baseCode64.length()+"duguang.aliyun.comdemo_shouxie");
        Object obj = null;
        try {
            obj = se.eval(signStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        if (obj == null) {
            return null;
        }
        return String.valueOf(obj);
    }

    public static void main(String[] args) {
        OcrServiceImpl ocrService = new OcrServiceImpl();
        String recognition = ocrService.handwritingRecognition("D:\\deskTop\\11111.png");
        System.out.println(recognition);
    }
}

Base64Utils.java

package io.cqxa.util;

import org.apache.commons.io.IOUtils;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Base64;
import java.util.Optional;

/**
 * @author 任勇
 * @date 2021/10/21 14:42
 * @description base64工具类
 * 参考文档 https://blog.csdn.net/qq_39098813/article/details/81270164
 */
public class Base64Utils {
    /**
     * 将图片文件转换成base64字符串，参数为该图片的路径
     *
     * @param imageFilePath
     * @return java.lang.String
     */
    public static String imageToBase64(String imageFilePath) {
        // 对字节数组Base64编码
        return Optional.ofNullable(imageFilePath)
                .map(Base64Utils::imageToBase64NoPrefix)
                // 返回Base64编码过的字节数组字符串
                .map(dataTemp -> "data:image/jpeg;base64," + dataTemp)
                .orElse("");
    }
    /**
     * 将图片文件转换成base64字符串，参数为该图片的路径
     *
     * @param imageFilePath
     * @return java.lang.String
     */
    public static String imageToBase64NoPrefix(String imageFilePath) {
        byte[] data = null;
        // 读取图片字节数组
        try (InputStream in = new FileInputStream(imageFilePath)){
            data = IOUtils.toByteArray(in);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new String(Base64.getEncoder().encode(data));
    }
}

识别图片

js文件所在地址

标签：return,String,http,new,org,手写体,import,读光,OCR
来源： https://blog.csdn.net/weixin_48901677/article/details/120952179

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