# 第三方平台 调用服务平台接口
https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/servicemarket/serviceMarket.invokeService.html
# 微信证件OCR识别能力开放
https://developers.weixin.qq.com/community/develop/doc/000888093f4650c1c5c8208405bc01?highLine=%25E5%25BE%25AE%25E4%25BF%25A1OCR%25E8%25AF%2586%25E5%2588%25AB
# OCR接口文档
https://developers.weixin.qq.com/doc/offiaccount/Intelligent_Interface/OCR.html
# 获取access token
https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140183
# access_token是公众号的全局唯一接口调用凭据，公众号调用各接口时都需使用access_token
# 正常获取access_token之后，应该放入redis或其他key-value数据库里面，否则每次调用OCR接口时，都要重新调用获取token的接口
# access_token的有效期目前为2个小时，需定时刷新，重复获取将导致上次获取的access_token失效。
# 我这里为了代码的简洁，所以去掉了redis部分
# 下面的wx_appid、wx_secret 换成你自己的，就可以直接运行；
# 打印如下:
# accessToken : 56_0qVdwb5EV2G7s6X-9gUMu49kmvMtd0GAjNxjNuHsk-zrhT94yQ6aH57nrfj9ZRxDTNUXEX0S9M6LuhGrkrwTkgg0_CqWV3eTFlFGLiadLzM3x9EweFMZpexLhQh67H0mD2f0TNPtrK9aDeyxWOHiAFALDW
package com.example.favoritecode;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
/**
* @Author ds
* @Date 2022-04-26
*/
public class WxOcrTest {
public static void main(String[] args) throws Exception {
String accessToken = getWxAccessToken();
System.out.println("accessToken : " + accessToken);
}
/**
* 获取Access token
* access_token是公众号的全局唯一接口调用凭据，公众号调用各接口时都需使用access_token
* @return
* @throws Exception
*/
public static String getWxAccessToken() throws Exception {
String ACCESS_TOKEN_API = "https://api.weixin.qq.com/cgi-bin/token";
String wx_appid = "your app appid";
String wx_secret = "your app secret";
String getAccessTokenParam = "appid=" + wx_appid + "&secret=" + wx_secret + "&grant_type=client_credential";
// 获取凭证
String wechatResult = HttpUtils.get(ACCESS_TOKEN_API, getAccessTokenParam);
JSONObject jsonObj = JSONObject.parseObject(wechatResult);
// 解析微信返回消息
String token = null;
if (jsonObj != null) {
token = (String) jsonObj.get("access_token");
}
if (StringUtils.isEmpty(token)) {
System.err.println("******************** getWxAccessToken ********************");
System.err.println("** 获取微信凭证失败");
System.err.println("** wx_appid:" + wx_appid);
System.err.println("** wx_secret:" + wx_secret);
System.err.println("** ACCESS_TOKEN_API:" + ACCESS_TOKEN_API);
System.err.println("** 请求参数:" + getAccessTokenParam);
System.err.println("** 返回结果:" + wechatResult);
throw new Exception("调用微信接口，取 AccessToken 失败，返回结果：" + wechatResult);
}
return token;
}
}
package com.example.favoritecode;
import org.apache.commons.lang3.StringUtils;
import javax.net.ssl.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Map;
/**
* @author ds
* @date 2022.04.26
*/
public class HttpUtils {
/**
* 向指定URL发送GET方法的请求
*
* @param url 发送请求的URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String get(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String api = "";
if (StringUtils.isEmpty(param)) {
api = url;
} else {
api = url + "?" + param;
}
URL realUrl = new URL(api);
// 打开和URL之间的连接
if (api.startsWith("https://")) {
HttpsURLConnection httpConn = (HttpsURLConnection) realUrl.openConnection();
SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
//第一个参数为 返回实现指定安全套接字协议的SSLContext对象。第二个为提供者
TrustManager[] tm = {new MyX509TrustManager()};
sslContext.init(null, tm, new SecureRandom());
SSLSocketFactory ssf = sslContext.getSocketFactory();
httpConn.setSSLSocketFactory(ssf);
// 设置通用的请求属性
httpConn.setRequestProperty("accept", "*/*");
httpConn.setRequestProperty("connection", "Keep-Alive");
httpConn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
httpConn.connect();
// 获取所有响应头字段
Map<String, List<String>> map = httpConn.getHeaderFields();
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(httpConn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} else {
URLConnection httpConn = realUrl.openConnection();
// 设置通用的请求属性
httpConn.setRequestProperty("accept", "*/*");
httpConn.setRequestProperty("connection", "Keep-Alive");
httpConn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
httpConn.connect();
// 获取所有响应头字段
Map<String, List<String>> map = httpConn.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(httpConn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
}
class MyX509TrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}
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