alipayconfig alipayconfig = new alipayconfig();

// 设置网关地址

string gateway = null;

alipayconfig.setserverurl(gateway);

// 设置第三方应用 appid

string app_id = null;

alipayconfig.setappid(app_id);

// 设置应用私钥

string private_key = null;

alipayconfig.setprivatekey(private_key);

// 设置应用公钥证书路径

string app_cert_path = null;

alipayconfig.setappcertpath(app_cert_path);

// 设置支付宝公钥证书路径

string alipay_cert_path = null;

alipayconfig.setalipaypubliccertpath(alipay_cert_path);

// 设置支付宝根证书路径

string alipay_root_cert_path = null;

alipayconfig.setrootcertpath(alipay_root_cert_path);

// 设置请求格式，固定值json

alipayconfig.setformat("json");

// 设置字符集

string charset = null;

alipayconfig.setcharset(charset);

// 设置签名类型

string sign_type = null;

alipayconfig.setsigntype(sign_type);

// 设置加密类型

alipayconfig.setencrypttype("aes");

// 设置 aes 密钥

string encryp_key = null;

alipayconfig.setencryptkey(encryp_key);

// 构造client

defaultalipayclient alipayclient = new defaultalipayclient(alipayconfig);

request.putothertextparam("app_auth_token", "201903bb61c87d68fee1456cac3bb65b6d515d88");

alipayconfig alipayconfig = new alipayconfig();

alipayconfig.setappid(app_id); //第三方应用appid

defaultalipayclient alipayclient = new defaultalipayclient(alipayconfig);

alipaysystemoauthtokenrequest request = new alipaysystemoauthtokenrequest();

request.putothertextparam("app_auth_token", "201903bb61c87d68fee1456cac3bb65b6d515d88"); //第三方应用代小程序模板调用接口必须传入

alipaysystemoauthtokenresponse response = alipayclient.execute(request);

system.out.println("调用成功");

} else {

system.out.println("调用失败");

$aop = new aopclient ();

$aop->gatewayurl = 'https://openapi.alipay.com/gateway.do';

$aop->appid = '第三方应用 app_id';

$aop->rsaprivatekey = '第三方应用私钥';

$aop->apiversion = '1.0';

$aop->signtype = 'rsa2';

$request = new alipaysystemoauthtokenrequest ();

$result = $aop->execute ( $request, null, app_auth_token); //第三方应用代小程序模板调用接口必须传入

$responsenode = str_replace(".", "_", $request->getapimethodname()) . "_response";

$resultcode = $result->$responsenode->code;

if(!empty($resultcode)&&$resultcode != 10000){

echo "失败";

} else {

echo "成功";

iaopclient client = new defaultaopclient("https://openapi.alipay.com/gateway.do", "第三方应用app_id", "第三方应用私钥merchant_private_key", "json", "1.0", "rsa2", "第三方应用支付宝公钥alipay_public_key", "gbk", false);

alipaysystemoauthtokenrequest request= new alipaysystemoauthtokenrequest() ;

request.granttype = "authorization_code";

request.code = "4b203fe6c11548bcabd8da5bb087a83b";

alipaysystemoauthtokenresponse response=client.execute(request,"",app_auth_token);//第三方应用代小程序模板调用接口必须传入

app_auth_tokenconsole.writeline(response.body);