在调合合AI平台提供的图片美化增强API接口，API平台链接：https://ai.ccint.com/doc/api/crop_enhance_image， 因为有遇到一些问题，写篇博客记录一下

API文档提供的说明: url中参数app_key为个人中心实例的app_key

请求方式: POST

返回类型: JSON

POST BODY请求字段描述

字段	说明
image_data	必填，图像的base64串
app_secret	必填，个人中心实例的app_secret
scan-m	扫描模式， 建议为 1
detail	锐化程度，建议为-1
contrast	对比度 ，建议为 0
bright	增亮 ，建议为 0
enhanceMode	增强模式，1：增亮，2：增强并锐化，3：黑白，4：灰度

POST BODY，接口要求以Post body方式发送，因为要传base64字符串，请求参数过长有400错误的

{"image_data": "", // 必填，图像的base64串"app_secret": "" // 必填，个人中心实例的app_secret"scan-m": 1, //扫描模式， 建议为 1"detail": -1, //锐化程度，建议为-1"contrast": 0, //对比度 ，建议为 0"bright": 0, //增亮 ，建议为 0"enhanceMode": 0 //增强模式，1：增亮，2：增强并锐化，3：黑白，4：灰度
}

提示：POST BODY 为 JSON字符串。

返回字段描述

字段	说明
code	返回状态码。200:正常返回; 500:服务器内部错误
message	返回对应code的状态说明
result	base64编码的图片信息

正常返回示例

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

失败返回示例

{"code":30301,"message":"额度已用完，请充值后使用"
}

返回码说明

API文档提供的实例代码：

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_keyString appSecret = "xxxxxx"; // your app_secreturl = 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"); // 设置请求方式conn.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的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("发送 POST 请求出现异常！" + 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);}
}

注意要点：

• 写文件流时记得outputstream要flush，才能拿到数据
• 接口返回的json格式的数据，同时带有base64的字符串，所以需要json解析一下，然后调工具类，将base64字符串转换为文件，保存在本地，下面给出调用的代码，仅供参考

/*** 图片切边增强接口调用* @author nicky.ma* @date   2019年5月20日下午3:44:27* @param scanM   扫描模式， 建议为 1* @param bright    增亮 ，建议为 0* @param contrast   对比度 ，建议为 0* @param detail     锐化程度，建议为-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转换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"); // 设置请求方式//conn.setRequestProperty("transfer-encoding","chunked");conn.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的conn.connect();out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");out.append(param);//要记得flush,才能拿到数据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("图片增强后文件大小:{}"+new File(destPath).length()/1024+"KB");}conn.disconnect();} catch (Exception e) {logger.error("AI平台接口调用异常:{}"+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字符串和文件转换工具类：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;import org.apache.commons.codec.binary.Base64;public class FileBase64Util{/*** 将文件转成base64 字符串* @param path文件路径* @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);}/*** 将base64字符解码保存文件* @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();}/*** 将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();}}
}