AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do","app_id","your private_key","json","GBK","alipay_public_key","RSA2");
AlipayUserAgreementUnsignRequest request = new AlipayUserAgreementUnsignRequest();
request.setBizContent("{" +
"\"alipay_user_id\":\"alipay_user_id\"," +
"\"alipay_logon_id\":\"abx@alitest.com\"," +
"\"personal_product_code\":\"GENERAL_WITHHOLDING_P\"," +
"\"sign_scene\":\"INDUSTRY|MEDICA\"," +
"\"external_agreement_no\":\"test\"," +
"\"third_party_type\":\"PARTNER\"," +
"\"agreement_no\":\"20170322450983769228\"," +
"\"extend_params\":\"{\\\"UNSIGN_ERROR_CODE\\\": \\\"USER_OWE_MONEY\\\",\\\"UNSIGN_ERROR_INFO\\\":\\\"10.00\\\"}\"," +
"\"operate_type\":\"confirm\"" +
"  }");
AlipayUserAgreementUnsignResponse response = alipayClient.execute(request);
if(response.isSuccess()){
System.out.println("调用成功");
} else {
System.out.println("调用失败");
}

IAopClient client = new DefaultAopClient("https://openapi.alipay.com/gateway.do", "app_id", "merchant_private_key", "json", "1.0", "RSA2", "alipay_public_key", "GBK", false);
AlipayUserAgreementUnsignRequest  request= new AlipayUserAgreementUnsignRequest() ;
request.BizContent="{" +
"\"alipay_user_id\":\"alipay_user_id\"," +
"\"alipay_logon_id\":\"abx@alitest.com\"," +
"\"personal_product_code\":\"GENERAL_WITHHOLDING_P\"," +
"\"sign_scene\":\"INDUSTRY|MEDICA\"," +
"\"external_agreement_no\":\"test\"," +
"\"third_party_type\":\"PARTNER\"," +
"\"agreement_no\":\"20170322450983769228\"," +
"\"extend_params\":\"{\\\"UNSIGN_ERROR_CODE\\\": \\\"USER_OWE_MONEY\\\",\\\"UNSIGN_ERROR_INFO\\\":\\\"10.00\\\"}\"," +
"\"operate_type\":\"confirm\"" +
"  }";
AlipayUserAgreementUnsignResponse response=client.execute(request);
Console.WriteLine(response.Body);

$aop = new AopClient ();
$aop->gatewayUrl = 'https://openapi.alipay.com/gateway.do';
$aop->appId = 'your app_id';
$aop->rsaPrivateKey = '请填写开发者私钥去头去尾去回车，一行字符串';
$aop->alipayrsaPublicKey='请填写支付宝公钥，一行字符串';
$aop->apiVersion = '1.0';
$aop->signType = 'RSA2';
$aop->postCharset='GBK';
$aop->format='json';
$request = new AlipayUserAgreementUnsignRequest ();
$request->setBizContent("{" .
"\"alipay_user_id\":\"alipay_user_id\"," .
"\"alipay_logon_id\":\"abx@alitest.com\"," .
"\"personal_product_code\":\"GENERAL_WITHHOLDING_P\"," .
"\"sign_scene\":\"INDUSTRY|MEDICA\"," .
"\"external_agreement_no\":\"test\"," .
"\"third_party_type\":\"PARTNER\"," .
"\"agreement_no\":\"20170322450983769228\"," .
"\"extend_params\":\"{\\\"UNSIGN_ERROR_CODE\\\": \\\"USER_OWE_MONEY\\\",\\\"UNSIGN_ERROR_INFO\\\":\\\"10.00\\\"}\"," .
"\"operate_type\":\"confirm\"" .
"  }");
$result = $aop->execute ( $request); 

$responseNode = str_replace(".", "_", $request->getApiMethodName()) . "_response";
$resultCode = $result->$responseNode->code;
if(!empty($resultCode)&&$resultCode == 10000){
echo "成功";
} else {
echo "失败";
}

https://openapi.alipay.com/gateway.do?timestamp=2013-01-01 08:08:08&method=alipay.user.agreement.unsign&app_id=5112&sign_type=RSA2&sign=ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE&version=1.0&biz_content=
  {
"alipay_user_id":"alipay_user_id",
"alipay_logon_id":"abx@alitest.com",
"personal_product_code":"GENERAL_WITHHOLDING_P",
"sign_scene":"INDUSTRY|MEDICA",
"external_agreement_no":"test",
"third_party_type":"PARTNER",
"agreement_no":"20170322450983769228",
"extend_params":"{\"UNSIGN_ERROR_CODE\": \"USER_OWE_MONEY\",\"UNSIGN_ERROR_INFO\":\"10.00\"}",
"operate_type":"confirm"
  }

//为确保安全通信，需自行验证响应示例中的sign值是否为蚂蚁金服所提供。

{
	"sign":"ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE",
	"alipay_user_agreement_unsign_response":{
		"msg":"Success",
		"code":"10000"
	}
}

{
	"sign":"ERITJKEIJKJHKKKKKKKHJEREEEEEEEEEEE",
	"alipay_user_agreement_unsign_response":{
		"msg":"Service Currently Unavailable",
		"code":"20000",
		"sub_msg":"系统繁忙",
		"sub_code":"isp.unknow-error"
	}
}

https://www.merchant.com/receive_notify.htm?notify_type=trade_status_sync&notify_id=91722adff935e8cfa58b3aabf4dead6ibe&notify_time=2017-02-16 21:46:15&sign_type=RSA2&sign=WcO+t3D8Kg71dTlKwN7r9PzUOXeaBJwp8/FOuSxcuSkXsoVYxBpsAidprySCjHCjmaglNcjoKJQLJ28/Asl93joTW39FX6i07lXhnbPknezAlwmvPdnQuI01HZsZF9V1i6ggZjBiAd5lG8bZtTxZOJ87ub2i9GuJ3Nr/NUc9VeY=&app_id=2017060101317939&auth_app_id=2017060101317935&alipay_logon_id=test***ali@alipay.net&agreement_no=20170502000610755993&alipay_user_id=2088101143488930&notify_type=dut_user_unsign&external_agreement_no=test&external_logon_id=13852852877&personal_product_code=GENERAL_WITHHOLDING_P&sign_scene=INDUSTRY|CARRENTAL&status=UNSIGN&unsign_time=2017-05-20 11:49:19