此篇java文章是基于聚合数据(http://www.juhe.cn)-----证件识别接口来演示，基本HTTP POST请求上传图片并接收JSON数据来处理，其他与上传图片相关的接口请求可参考此篇文章。
使用前你需要：
①：通过 http://www.juhe.cn/docs/api/id/153 申请一个名片识别的appkey
1.支持的证件类型清单
此接口可通过GET请求得到结果,java网络请求有HttpClient相关工具包及HttpURLConnection相关的包等，这里用的是HttpClient，需要先导包，如果用maven话会更方便直接把:
org.apache.httpcomponents
httpmime
4.3.6
org.apache.httpcomponents
httpclient
4.4.1
复制到配置文件 pom.xml
请求代码如下：
public static String get() throws IOException {
// 创建HttpClient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String result = null;
try {
HttpGet httpGet = new HttpGet("http://api2.juheapi.com/cardrecon/supportlist?key="+ appKey);
// 执行网络请求
response = httpClient.execute(httpGet);
// 获取请求实体
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
// ConverStreamToString是下面写的一个方法是把网络请求的字节流转换为utf8的字符串
result = ConvertStreamToString(resEntity.getContent(), "UTF-8");
}
EntityUtils.consume(resEntity);
} catch (Exception e) {
} finally {
// 关闭请求
response.close();
httpClient.close();
}
// 得到的是JSON类型的数据需要第三方解析JSON的jar包来解析
return result;
}
2.证件图片识别
// 此方法是POST请求上传的参数中包含本地图片信息File类型
public static String post(String type, File file) throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String result = null;
// HttpClient请求的相关设置，可以不用配置，用默认的参数，这里设置连接和超时时长(毫秒)
RequestConfig config = RequestConfig.custom().setConnectTimeout(30000).setSocketTimeout(30000).build();
try {
HttpPost httppost = new HttpPost("http://api2.juheapi.com/cardrecon/upload");
// FileBody封装File类型的参数
FileBody bin = new FileBody(file);
// StringBody封装String类型的参数
StringBody keyBody = new StringBody(key, ContentType.TEXT_PLAIN);
StringBody typeBody = new StringBody(type, ContentType.TEXT_PLAIN);
// addPart将参数传入，并指定参数名称
HttpEntity reqEntity = MultipartEntityBuilder.create()
.addPart("pic", bin).addPart("key", keyBody)
.addPart("cardType", typeBody).build();
httppost.setEntity(reqEntity);
httppost.setConfig(config);
// 执行网络请求并返回结果
response = httpClient.execute(httppost);
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
result = ConvertStreamToString(resEntity.getContent(), "UTF-8");
}
EntityUtils.consume(resEntity);
} finally {
response.close();
httpClient.close();
}
// 得到的是JSON类型的数据需要第三方解析JSON的jar包来解析
return result;
}
// 此方法是把传进的字节流转化为相应的字符串并返回，此方法一般在网络请求中用到
public static String ConvertStreamToString(InputStream is, String charset)
throws Exception {
StringBuilder sb = new StringBuilder();
try (InputStreamReader inputStreamReader = new InputStreamReader(is,charset)) {
try (BufferedReader reader = new BufferedReader(inputStreamReader)) {
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line).append("\r\n");
}
}
}
return sb.toString();
}
原文链接：https://blog.csdn.net/weixin_29009669/article/details/115044452
