在調(diào)合合AI平臺(tái)提供的圖片美化增強(qiáng)API接口，API平臺(tái)鏈接：https://ai.ccint.com/doc/api/crop_enhance_image， 因?yàn)橛杏龅揭恍﹩栴}缎除，寫篇博客記錄一下

API文檔提供的說(shuō)明: url中參數(shù)app_key為個(gè)人中心實(shí)例的app_key

請(qǐng)求方式: POST

返回類型: JSON

POST BODY請(qǐng)求字段描述

POST BODY蕴忆，接口要求以Post body方式發(fā)送颤芬，因?yàn)橐獋鱞ase64字符串，請(qǐng)求參數(shù)過(guò)長(zhǎng)有400錯(cuò)誤的

    
{
    "image_data": "", // 必填，圖像的base64串
    "app_secret": "" // 必填站蝠，個(gè)人中心實(shí)例的app_secret
  "scan-m": 1, //掃描模式汰具， 建議為 1
  "detail": -1, //銳化程度，建議為-1
  "contrast": 0, //對(duì)比度 菱魔，建議為 0
  "bright": 0, //增亮 留荔，建議為 0
  "enhanceMode": 0 //增強(qiáng)模式，1：增亮澜倦，2：增強(qiáng)并銳化聚蝶，3：黑白，4：灰度
}

提示：POST BODY 為 JSON字符串藻治。

返回字段描述

正常返回示例

{
    "code": 200,
    "message": "success",
    "result": “圖片base64信息”
}

失敗返回示例

    {
    "code":30301,
    "message":"額度已用完，請(qǐng)充值后使用"
}

返回碼說(shuō)明

在這里插入圖片描述

API文檔提供的實(shí)例代碼：

import sun.misc.BASE64Encoder;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

public class Main {
    public static void main(String[] args) throws Exception {
        String url = "https://ocr-api.ccint.com/ocr_service?app_key=%s";
        String appKey = "xxxxxx"; // your app_key
      String appSecret = "xxxxxx"; // your app_secret
      url = String.format(url, appKey);
        OutputStreamWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            String imgData = imageToBase64("example.jpg");
            String param="{\"app_secret\":\"%s\",\"image_data\":\"%s\"}";
            param=String.format(param,appSecret,imgData);
            URL realUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod("POST"); // 設(shè)置請(qǐng)求方式
            conn.setRequestProperty("Content-Type", "application/json"); // 設(shè)置發(fā)送數(shù)據(jù)的
            conn.connect();
            out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
            out.append(param);
            out.flush();
            out.close();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("發(fā)送 POST 請(qǐng)求出現(xiàn)異常栋艳！" + e);
            e.printStackTrace();
        }
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        System.out.println(result);
    }
    public static String imageToBase64(String path)
    {
        String imgFile = path;
        InputStream in = null;
        byte[] data = null;
        try
        {
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
}

注意要點(diǎn)：

• 寫文件流時(shí)記得outputstream要flush恰聘，才能拿到數(shù)據(jù)
• 接口返回的json格式的數(shù)據(jù)句各，同時(shí)帶有base64的字符串吸占，所以需要json解析一下，然后調(diào)工具類凿宾，將base64字符串轉(zhuǎn)換為文件矾屯，保存在本地，下面給出調(diào)用的代碼初厚，僅供參考

/**
     * 圖片切邊增強(qiáng)接口調(diào)用
     * @author nicky.ma
     * @date   2019年5月20日下午3:44:27
     * @param scanM   掃描模式件蚕， 建議為 1
     * @param bright    增亮 ，建議為 0
     * @param contrast   對(duì)比度 产禾，建議為 0
     * @param detail     銳化程度排作，建議為-1
     * @param sourcePath  
     * @param destPath
     * detail=0&contrast=0&bright=50  增到最亮
     * @return
     */
    public static void ccintCropEnhanceHttpService(final int scanM,final int bright,final int contrast,
            final int detail,final int enhanceMode,String sourcePath,String destPath) throws Exception{
        logger.info("sourcePath:{}"+sourcePath);
        logger.info("destPath:{}"+destPath);
        
        //base64轉(zhuǎn)換
        final String imgData = imageToBase64(sourcePath);
        
        Map<String,Object> paramsMap=new HashMap<String,Object>(){
        private static final long serialVersionUID=1L;
        {
                put("image_data",imgData);
                put("app_secret",CCINT_APP_SECRET);
                put("scan-m",scanM);
                put("detail",detail);
                put("contrast",contrast);
                put("bright",bright);
                put("enhanceMode",enhanceMode);
        }};
        String param = JSON.toJSONString(paramsMap);
        
//      String param="{\"app_secret\":\"%s\",\"image_data\":\"%s\",\"scan-m\":\"%s\",\"detail\":\"%s\",\"contrast\":\"%s\",\"bright\":\"%s\",\"enhanceMode\":\"%s\"}";
//      param=String.format(param,CCINT_APP_SECRET,imgData,scanM,detail,contrast,bright,enhanceMode);
        
        String url = CCINT_CROP_ENHANCE_URL+"?app_key="+CCINT_APP_KEY;
        OutputStreamWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            conn.setConnectTimeout(20*1000);
            conn.setReadTimeout(20*1000);
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod("POST"); // 設(shè)置請(qǐng)求方式
            //conn.setRequestProperty("transfer-encoding","chunked");
            conn.setRequestProperty("Content-Type", "application/json"); // 設(shè)置發(fā)送數(shù)據(jù)的
            conn.connect();
            out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
            out.append(param);
            //要記得flush,才能拿到數(shù)據(jù)
            out.flush();
            out.close();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            logger.info("返回Result:{}"+result);
            int code=conn.getResponseCode();
            if(code==200){
                JSONObject obj = JSON.parseObject(result);
//              copyFileByInputStream(conn.getInputStream(),destPath);
                FileBase64Util.decoderBase64File(obj.getString("result"), destPath);
                logger.info("圖片增強(qiáng)后文件大小:{}"+new File(destPath).length()/1024+"KB");
            }
            conn.disconnect();

        } catch (Exception e) {
            logger.error("AI平臺(tái)接口調(diào)用異常:{}"+e);
            e.printStackTrace();
        }finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
    
    private static String imageToBase64(String path)
    {
        String imgFile = path;
        InputStream in = null;
        byte[] data = null;
        try
        {
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
    

base64字符串和文件轉(zhuǎn)換工具類：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import org.apache.commons.codec.binary.Base64;

public class FileBase64Util{

     /**
      * 將文件轉(zhuǎn)成base64 字符串
      * @param path文件路徑
      * @return   
      * @throws Exception
      */
     public static String encodeBase64File(String path) throws Exception {
       File file = new File(path);
       FileInputStream inputFile = new FileInputStream(file);
       byte[] buffer = new byte[(int) file.length()];
       inputFile.read(buffer);
       inputFile.close();
       return Base64.encodeBase64String(buffer);
     }

     /**
      * 將base64字符解碼保存文件
      * @param base64String
      * @param targetPath
      * @throws Exception
      */

     public static void decoderBase64File(String base64String, String targetPath)throws Exception {
         byte[] buffer=Base64.decodeBase64(base64String);
         FileOutputStream out = new FileOutputStream(targetPath);
         out.write(buffer);
         out.close();
     }

     /**
      * 將base64字符保存文本文件
      * @param base64Code
      * @param targetPath
      * @throws Exception
      */

     public static void toFile(String base64Code, String targetPath)throws Exception {
        byte[] buffer=base64Code.getBytes();
        FileOutputStream out = new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();
      }

     public static void main(String[] args){
         try{
            String base64String=${base64字符串};
            decoderBase64File(encodeBase64File("d://2018-11-27 14_34_28_reject_dq.pdf"),"D:/2.pdf");
         }catch(Exception e){
            e.printStackTrace();
         }
     }
}