1.开放文档: https://doc./docs/api.html
2.代码
public static void main(String[] args) {/** 初始化 **/CertAlipayRequest certAlipayRequest = new CertAlipayRequest();/** 支付宝网关 **/certAlipayRequest.setServerUrl("/gateway.do");/** 应用id，如何获取请参考：/support/helpcenter/190/02493024 **/certAlipayRequest.setAppId("");/** 应用私钥, 如何获取请参考：/support/helpcenter/207/02471154?ant_source=antsupport **/certAlipayRequest.setPrivateKey("");/** 应用公钥证书路径，下载后保存位置的绝对路径 **/certAlipayRequest.setCertPath("");/** 支付宝公钥证书路径，下载后保存位置的绝对路径 **/certAlipayRequest.setAlipayPublicCertPath("");/** 支付宝根证书路径，下载后保存位置的绝对路径 **/certAlipayRequest.setRootCertPath("");/** 设置签名类型 **/certAlipayRequest.setSignType("RSA2");/** 设置请求格式，固定值json **/certAlipayRequest.setFormat("json");/** 设置编码格式 **/certAlipayRequest.setCharset("UTF-8");AlipayClient alipayClient = null;try {alipayClient = new DefaultAlipayClient(certAlipayRequest);} catch (AlipayApiException e1) {e1.printStackTrace();}/** 实例化具体API对应的request类，类名称和接口名称对应,当前调用接口名称：alipay.fund.trans.uni.transfer(单笔转账接口) **/AlipayFundTransUniTransferRequest request = new AlipayFundTransUniTransferRequest();/** 设置业务参数，具体接口参数传值以文档说明为准：/apis/api_28/alipay.fund.trans.uni.transfer/ **/AlipayFundTransUniTransferModel model = new AlipayFundTransUniTransferModel();/** 商户端的唯一订单号，对于同一笔转账请求，商户需保证该订单号唯一 **/model.setOutBizNo("202900001");/** 转账金额，TRANS_ACCOUNT_NO_PWD产品取值最低0.1 **/model.setTransAmount("0.1");/** 产品码，单笔无密转账到支付宝账户固定为：TRANS_ACCOUNT_NO_PWD **/model.setProductCode("TRANS_ACCOUNT_NO_PWD");/** 场景码，单笔无密转账到支付宝账户固定为：DIRECT_TRANSFER **/model.setBizScene("DIRECT_TRANSFER");/** 转账业务的标题，用于在支付宝用户的账单里显示 **/model.setOrderTitle("转账标题");Participant participant = new Participant();/** 参与方的唯一标识,收款支付宝账号或者支付宝吧账号唯一会员ID **/participant.setIdentity("2088******");/** 参与方的标识类型：ALIPAY_USER_ID 支付宝的会员ID **/participant.setIdentityType("ALIPAY_USER_ID");/** 参与方真实姓名，如果非空，将校验收款支付宝账号姓名一致性。当identity_type=ALIPAY_LOGON_ID时，本字段必填 **/participant.setName("张三");model.setPayeeInfo(participant);/** 业务备注 **/model.setRemark("单笔转账");request.setBizModel(model);AlipayFundTransUniTransferResponse response = null;try {response = alipayClient.certificateExecute(request);} catch (AlipayApiException e) {e.printStackTrace();}/** 获取接口调用结果，如果调用失败，可根据返回错误信息到该文档寻找排查方案：/support/helpcenter/114 **/
3.pom依赖
<dependency><groupId>com.alipay.sdk</groupId><artifactId>alipay-sdk-java</artifactId><version>4.10.70.ALL</version></dependency>
