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支付宝今年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idalipay.serverUrl=https://openapi.alipay.com/gateway.doalipay.privateKey=你的应用私钥alipay.format=jsonalipay.charset=UTF-8alipay.signType=RSA2alipay.appCertPath=/cert/appCertPublicKey_2021001164652941.crtalipay.alipayCertPath=/cert/alipayCertPublicKey_RSA2.crtalipay.alipayRootCertPath=/cert/alipayRootCert.crt

3.引入pom依赖

        
    
     com.alipay.sdk
         
    
     alipay-sdk-java
         
    
     4.10.97.ALL
    
   

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")@Datapublic 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;@Configurationpublic class AliConfig {    @Value("${custom.http.proxyHost}")    private String proxyHost;    @Value("${custom.http.proxyPort}")    private int proxyPort;    @Value("${spring.profiles.active}")    private String activeEnv;    @Autowired    private 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Id        certAlipayRequest.setAppId(aliPayBean.getAppId());        //设置应用私钥        certAlipayRequest.setPrivateKey(aliPayBean.getPrivateKey());        //设置请求格式，固定值json        certAlipayRequest.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 {            //local            String 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@Servicepublic 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sdkExecute        AlipayTradeAppPayResponse 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;    }}

Tips：转账用到的类

@Datapublic 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 */@Datapublic 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;}

@Datapublic 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;}

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