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支付宝推出了新的转账接口alipay.fund.trans.uni.transfer(升级后安全性更高，功能更加强大) ，老转账接口alipay.fund.trans.toaccount.transfer将不再维护，新老接口的一个区别就是新接口采用的证书验签方式。

使用新接口要将sdk版本升级到最新版本，博主升级时最新版本是4.10.97。

接下来看集成步骤。

1.将支付宝开放平台里下载的3个证书放在resources下面

2.写支付宝支付的配置文件

alipay.properties

alipay.appId=你的应用id
alipay.serverUrl=https://openapi.alipay.com/gateway.do
alipay.privateKey=你的应用私钥
alipay.format=json
alipay.charset=UTF-8
alipay.signType=RSA2
alipay.appCertPath=/cert/appCertPublicKey_2021001164652941.crt
alipay.alipayCertPath=/cert/alipayCertPublicKey_RSA2.crt
alipay.alipayRootCertPath=/cert/alipayRootCert.crt

3.引入pom依赖

<dependency><groupId>com.alipay.sdk</groupId><artifactId>alipay-sdk-java</artifactId><version>4.10.97.ALL</version>
</dependency>

4.将配置信息注入AliPayBean

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;@Component
@PropertySource("classpath:/production/alipay.properties")
@ConfigurationProperties(prefix = "alipay")
@Data
public class AliPayBean {private String appId;private String privateKey;private String publicKey;private String serverUrl;private String domain;private String format;private String charset;private String signType;private String appCertPath;private String alipayCertPath;private String alipayRootCertPath;}

5.写配置类

import com.alipay.api.AlipayClient;
import com.alipay.api.CertAlipayRequest;
import com.alipay.api.DefaultAlipayClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.FileCopyUtils;import java.io.InputStream;@Configuration
public class AliConfig {@Value("${custom.http.proxyHost}")private String proxyHost;@Value("${custom.http.proxyPort}")private int proxyPort;@Value("${spring.profiles.active}")private String activeEnv;@Autowiredprivate AliPayBean aliPayBean;@Bean(name = {"alipayClient"})public AlipayClient alipayClientService() throws Exception{CertAlipayRequest certAlipayRequest = new CertAlipayRequest();//设置网关地址certAlipayRequest.setServerUrl(aliPayBean.getServerUrl());//设置应用IdcertAlipayRequest.setAppId(aliPayBean.getAppId());//设置应用私钥certAlipayRequest.setPrivateKey(aliPayBean.getPrivateKey());//设置请求格式，固定值jsoncertAlipayRequest.setFormat(aliPayBean.getFormat());//设置字符集certAlipayRequest.setCharset(aliPayBean.getCharset());//设置签名类型certAlipayRequest.setSignType(aliPayBean.getSignType());//如果是生产环境或者预演环境，则使用代理模式if ("prod".equals(activeEnv) || "stage".equals(activeEnv) || "test".equals(activeEnv)) {//设置应用公钥证书路径certAlipayRequest.setCertContent(getCertContentByPath(aliPayBean.getAppCertPath()));//设置支付宝公钥证书路径certAlipayRequest.setAlipayPublicCertContent(getCertContentByPath(aliPayBean.getAlipayCertPath()));//设置支付宝根证书路径certAlipayRequest.setRootCertContent(getCertContentByPath(aliPayBean.getAlipayRootCertPath()));certAlipayRequest.setProxyHost(proxyHost);certAlipayRequest.setProxyPort(proxyPort);}else {//localString serverPath = this.getClass().getResource("/").getPath();//设置应用公钥证书路径certAlipayRequest.setCertPath(serverPath+aliPayBean.getAppCertPath());//设置支付宝公钥证书路径certAlipayRequest.setAlipayPublicCertPath(serverPath+aliPayBean.getAlipayCertPath());//设置支付宝根证书路径certAlipayRequest.setRootCertPath(serverPath+aliPayBean.getAlipayRootCertPath());}return new DefaultAlipayClient(certAlipayRequest);}public String getCertContentByPath(String name){InputStream inputStream = null;String content = null;try{inputStream = this.getClass().getClassLoader().getResourceAsStream(name);content = new String(FileCopyUtils.copyToByteArray(inputStream));}catch (Exception e){e.printStackTrace();}return content;}}

6.写支付工具类

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.domain.AlipayTradeAppPayModel;
import com.alipay.api.domain.AlipayTradeQueryModel;
import com.alipay.api.request.AlipayTradeAppPayRequest;
import com.alipay.api.request.AlipayTradeQueryRequest;
import com.alipay.api.response.AlipayTradeAppPayResponse;
import com.alipay.api.response.AlipayTradeQueryResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
/*** @description:支付宝工具类* @Date:2020-08-26*/
@Slf4j
@Service
public class AliPayUtils {@Autowired@Qualifier("alipayClient")private AlipayClient alipayClient;/*** 交易查询接口* @param request* @return* @throws Exception*/public boolean isTradeQuery(AlipayTradeQueryModel model) throws AlipayApiException {AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();request.setBizModel(model);AlipayTradeQueryResponse alipayTradeQueryResponse = alipayClient.certificateExecute(request);if(alipayTradeQueryResponse.isSuccess()){return true;} else {return false;}}/*** app支付* @param model* @param notifyUrl* @return* @throws AlipayApiException*/public String startAppPay(AlipayTradeAppPayModel model, String notifyUrl)  throws AlipayApiException {AlipayTradeAppPayRequest aliPayRequest = new AlipayTradeAppPayRequest();model.setProductCode("QUICK_MSECURITY_PAY");aliPayRequest.setNotifyUrl(notifyUrl);aliPayRequest.setBizModel(model);// 这里和普通的接口调用不同，使用的是sdkExecuteAlipayTradeAppPayResponse aliResponse = alipayClient.sdkExecute(aliPayRequest);return aliResponse.getBody();}/*** 转账接口** @param transferParams* @return AlipayFundTransToaccountTransferResponse*/public AlipayFundTransUniTransferResponse doTransferNew(TransferParams transferParams) throws Exception {String title = (StringUtils.isNotBlank(transferParams.getRemark()) ? transferParams.getRemark() : "转账");//转账请求入参AlipayFundTransUniTransferRequest request = new AlipayFundTransUniTransferRequest();//转账参数BizContentForUniTransfer bizContent = new BizContentForUniTransfer();bizContent.setOut_biz_no(transferParams.getOutBizNo());bizContent.setTrans_amount(MathUtil.changeF2Y(Math.abs(Integer.parseInt(transferParams.getAmount()))));bizContent.setProduct_code("TRANS_ACCOUNT_NO_PWD");bizContent.setBiz_scene("DIRECT_TRANSFER");bizContent.setOrder_title(title);Participant participant = new Participant();participant.setIdentity(transferParams.getPayeeAccount());participant.setIdentity_type(transferParams.getPayeeType());participant.setName((StringUtils.isNotBlank(transferParams.getPayeeRealName()) ? transferParams.getPayeeRealName() : StringUtils.EMPTY));bizContent.setPayee_info(participant);bizContent.setRemark(title);request.setBizContent(JSON.toJSONString(bizContent));//转账请求返回AlipayFundTransUniTransferResponse response = null;try {response = alipayClient.certificateExecute(request);} catch (Exception e) {log.info("doTransfer exception，异常信息：{}", e.toString());log.info("doTransfer exception，支付宝返回信息：{}", JSONObject.toJSONString(response));}log.info("doTransfer,AlipayFundTransUniTransferResponse:{}", JSONObject.toJSONString(response));return response;}
}

Spring Boot 最新教程推荐看这个：

https://github.com/javastacks/spring-boot-best-practice

Tips：转账用到的类

@Data
public class TransferParams {/*** 应用编号*/private Long appId;/*** 创建人id*/private Long createdBy;/*** 转账业务订单号*/private String outBizNo;/*** 收款方识别方式*/private String payeeType;/*** 收款方账号，可以是支付宝userId或者支付宝loginId*/private String payeeAccount;/*** 转账金额，单位分*/private String amount;/*** 付款方名称*/private String payerShowName;/*** 收款方名称*/private String payeeRealName;/*** 备注*/private String remark;/*** 支付宝转账流水号*/private String orderId;
}

import lombok.Data;import java.math.BigDecimal;/*** 支付宝转账参数*/
@Data
public class BizContentForUniTransfer {/*** 业务订单号*/private String out_biz_no;/*** 订单总金额，单位为元，精确到小数点后两位，*/private BigDecimal trans_amount;/*** 业务产品码，* 单笔无密转账到支付宝账户固定为:TRANS_ACCOUNT_NO_PWD；* 单笔无密转账到银行卡固定为:TRANS_BANKCARD_NO_PWD;* 收发现金红包固定为:STD_RED_PACKET；*/private String product_code;/*** 描述特定的业务场景，可传的参数如下：* DIRECT_TRANSFER：单笔无密转账到支付宝/银行卡, B2C现金红包;* PERSONAL_COLLECTION：C2C现金红包-领红包*/private String biz_scene;/*** 转账业务的标题，用于在支付宝用户的账单里显示*/private String order_title;/*** 原支付宝业务单号。C2C现金红包-红包领取时，传红包支付时返回的支付宝单号；* B2C现金红包、单笔无密转账到支付宝/银行卡不需要该参数。*/private String original_order_id;/*** 业务备注*/private String remark;/*** 转账业务请求的扩展参数，支持传入的扩展参数如下：* 1、sub_biz_scene 子业务场景，红包业务必传，取值REDPACKET，C2C现金红包、B2C现金红包均需传入；* 2、withdraw_timeliness为转账到银行卡的预期到账时间，可选（不传入则默认为T1），* 取值T0表示预期T+0到账，取值T1表示预期T+1到账，因到账时效受银行机构处理影响，支付宝无法保证一定是T0或者T1到账；*/private String business_params;/*** 支付收款对象*/private Participant payee_info;
}

@Data
public class Participant {/*** 参与方的唯一标识*/private String identity;/*** 参与方的标识类型，目前支持如下类型：* 1、ALIPAY_USER_ID 支付宝的会员ID* 2、ALIPAY_LOGON_ID：支付宝登录号，支持邮箱和手机号格式*/private String identity_type;/*** 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。*/private String name;
}

原文链接：https://blog.csdn.net/qq_33556185/article/details/110445827

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