一个简单的验证码识别接口

1.识别验证码service

package com.fn.service;

/**
 * @ClassName: IdentifyCode
 * @Author: lxh
 * @Description: 识别验证码service
 * @Date: 2021/7/6 17:06
 */
public interface IdentifyCodeService {

    /**
     * 识别验证码接口
     * @param imagePath
     * @return java.lang.String
     * @author lxh
     */
    String identifyVerificationCode(String imagePath);

}

2.识别验证码impl，实现IdentifyCodeService接口

所有相关配置都在Nacos配置中心配置，通过@Value("${url.identifyUrl}") 去调用

url:
  identifyUrl: http://101.201.223.138:9188/api/captcha/simple-captcha
headers:
  appKey: 0c57a4fa-ada0-11eb-ad0f-7429af540200
  appSecret: e962c9da567a8cebf39d24e8ca0f488d

package com.fn.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.fn.service.IdentifyCodeService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
import sun.misc.BASE64Encoder;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @ClassName: IdentifyCodeServiceImpl
 * @Author: lxh
 * @Description: 识别验证码impl
 * @Date: 2021/7/6 17:10
 */
@Service
public class IdentifyCodeServiceImpl implements IdentifyCodeService {
    Logger logger = LoggerFactory.getLogger(IdentifyCodeServiceImpl.class);

    @Value("${url.identifyUrl}")
    private String identifyUrl;
    @Value("${headers.appKey}")
    private String appKey;
    @Value("${headers.appSecret}")
    private String appSecret;

    /**
     * 解析验证码实体
     * @param imagePath 
     * @return java.lang.String（返回解析出来的验证码）
     * @author lxh
     * @date 2021/7/29 13:56
     */
    @Override
    public String identifyVerificationCode(String imagePath) {
        //解析验证码
        RestTemplate template = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
        headers.setContentType(type);
        headers.add("appKey", appKey);
        headers.add("appSecret", appSecret);
        headers.setContentType(MediaType.APPLICATION_JSON);

        JSONObject body = new JSONObject();
        body.put("urlimg", "data:image/png;base64," + convertFileToBase64(imagePath));
        body.put("num", 4);
        body.put("type", "603");
        body.put("url", "http://xxxxx");
        HttpEntity<String> formEntity = new HttpEntity<String>(body.toString(), headers);
        ResponseEntity<JSONObject> responseEntity = template.exchange(identifyUrl, HttpMethod.POST, formEntity, JSONObject.class);
        String code = responseEntity.getBody().getString("v_code");
        logger.info("解析验证码:{}", code);

        return code;
    }

    /**
     * Base64编码
     */
    public String convertFileToBase64(String imgPath) {
        byte[] data = null;
        // 读取图片字节数组
        try {
            InputStream in = new FileInputStream(imgPath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 对字节数组进行Base64编码，得到Base64编码的字符串
        BASE64Encoder encoder = new BASE64Encoder();
        String base64Str = encoder.encode(data);
        return base64Str;
    }

}