基于springboot 支付宝app端支付，可用于uni-app使用

基于springboot 支付宝app端支付，可用于uni-app使用
1、添加maven依赖：

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>
 <dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
 </dependency>

2、创建支付实体类：

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@ApiModel("支付宝支付实体类")
@Accessors(chain = true)
@Url("https://openapi.alipay.com/gateway.do")
public class PayEntity implements Serializable {


    @JSONField(name = "out_trade_no")
    @ApiModelProperty(name = "out_trade_no"   , required = true  , value = "商户网站唯一订单号")
    private String outTradeNo ;

    @JSONField(name = "total_amount")
    @ApiModelProperty(name = "total_amount"   , required = true  , value = "订单总金额。单位为元，精确到小数点后两位，取值范围：[0.01,100000000] ")
    private String totalAmount ;

    @JSONField(name = "subject")
    @ApiModelProperty(name = "subject"        , required = true  , value = "订单标题。注意：不可使用特殊字符，如 /，=，& 等。")
    private String subject ;

    @JSONField(name = "product_code")
    @ApiModelProperty(name = "product_code"   , required = true  , value = "销售产品码，商家和支付宝签约的产品码。手机网站支付为：QUICK_WAP_WAY")
    private String productCode ;

    @JSONField(name = "auth_token")
    @ApiModelProperty(name = "auth_token"                        , value = "针对用户授权接口，获取用户相关数据时，用于标识用户授权关系")
    private String authToken ;

    @JSONField(name = "quit_url")
    @ApiModelProperty(name = "quit_url"                          , value = "用户付款中途退出返回商户网站的地址")
    private String quitUrl ;

    @JSONField(name = "time_expire")
    @ApiModelProperty(name = "time_expire"                       , value = "绝对超时时间，格式为yyyy-MM-dd HH:mm:ss")
    private String timeExpire ;

    @JSONField(name = "business_params")
    @ApiModelProperty(name = "business_params"                   , value = "商户传入业务信息，具体值要和支付宝约定，应用于安全，营销等参数直传场景，格式为json格式")
    private String businessParams ;

    @JSONField(name = "passback_params")
    @ApiModelProperty(name = "passback_params"                   , value = "公用回传参数，如果请求时传递了该参数，则返回给商户时会回传该参数。支付宝只会在同步返回（包括跳转回商户网站）和异步通知时将该参数原样返回。本参数必须进行UrlEncode之后才可以发送给支付宝。")
    private String passbackParams ;

    @JSONField(name = "merchant_order_no")
    @ApiModelProperty(name = "merchant_order_no"                 , value = "商户原始订单号，最大长度限制32位")
    private String merchantOrderNo ;

    @JSONField(name = "goods_detail")
    @ApiModelProperty(name = "goods_detail"                      , value = "订单包含的商品列表信息，json格式，其它说明详见商品明细说明")
    private GoodsDetail goodsDetail ;

    @JSONField(name = "extend_params")
    @ApiModelProperty(name = "extend_params"                    , value = "业务扩展参数")
    private ExtendParams extendParams ;


    @Data
    @Builder
    @NoArgsConstructor
    @AllArgsConstructor
    public static class GoodsDetail implements Serializable{

        @JSONField(name = "goods_id")
        @ApiModelProperty(name = "goods_id"      , required = true   , value = "商品的编号")
        private String goodsId ;

        @JSONField(name = "alipay_goods_id")
        @ApiModelProperty(name = "alipay_goods_id"                   , value = "支付宝定义的统一商品编号")
        private String alipayGoodsId ;

        @JSONField(name = "goods_name")
        @ApiModelProperty(name = "goods_name"                        , value = "商品名称")
        private String goodsName ;

        @JSONField(name = "quantity")
        @ApiModelProperty(name = "quantity"                          , value = "商品数量")
        private Integer quantity ;

        @JSONField(name = "price")
        @ApiModelProperty(name = "price"                             , value = "商品单价，单位为元")
        private String price ;

        @JSONField(name = "goods_category")
        @ApiModelProperty(name = "goods_category"                    , value = "商品类目")
        private String goodsCategory ;

        @JSONField(name = "categories_tree")
        @ApiModelProperty(name = "categories_tree"                   , value = "商品类目树，从商品类目根节点到叶子节点的类目id组成，类目id值使用|分割")
        private String categoriesTree ;

        @JSONField(name = "body")
        @ApiModelProperty(name = "body"                              , value = "商品描述信息")
        private String body ;

        @JSONField(name = "show_url")
        @ApiModelProperty(name = "show_url"                          , value = "商品的展示地址")
        private String showUrl ;

    }


    @Data
    @Builder
    @NoArgsConstructor
    @AllArgsConstructor
    public static class ExtendParams implements Serializable{

        @JSONField(name = "sys_service_provider_id")
        @ApiModelProperty(name = "sys_service_provider_id"           , value = "系统商编号该参数作为系统商返佣数据提取的依据，请填写系统商签约协议的PID")
        private String sysServiceProviderId ;

        @JSONField(name = "hb_fq_num")
        @ApiModelProperty(name = "hb_fq_num"                         , value = "使用花呗分期要进行的分期数")
        private String hbFqNum ;

        @JSONField(name = "hb_fq_seller_percent")
        @ApiModelProperty(name = "hb_fq_seller_percent"              , value = "使用花呗分期需要卖家承担的手续费比例的百分值，传入100代表100%")
        private String hbFqSellerPercent ;

        @JSONField(name = "industry_reflux_info")
        @ApiModelProperty(name = "industry_reflux_info"              , value = "行业数据回流信息, 详见：地铁支付接口参数补充说明")
        private String industryRefluxInfo ;

        @JSONField(name = "card_type")
        @ApiModelProperty(name = "card_type"                         , value = "卡类型")
        private String cardType ;

        @JSONField(name = "specified_seller_name")
        @ApiModelProperty(name = "specified_seller_name"             , value = "特殊场景下，允许商户指定交易展示的卖家名称")
        private String specifiedSellerName ;

    }

}

3、支付util类：

@Slf4j
public class PayUtils {

    private AlibabaProperties alibabaProperties;

    public static PayUtils newInstance(AlibabaProperties alibabaProperties){
        PayUtils payUtils = new PayUtils();
        payUtils.alibabaProperties = alibabaProperties;
        return payUtils ;
    }


    public String  pay(PayEntity payEntity) throws Exception{
        AlipayConfig alipayConfig = new AlipayConfig();
        alipayConfig.setServerUrl(payEntity.getClass().getAnnotation(Url.class).value());
        alipayConfig.setAppId(alibabaProperties.getAppId());
        alipayConfig.setPrivateKey(alibabaProperties.getPrivateKey());
        if(ProjectStatus.windows操作系统.getValue().equals(alibabaProperties.getEnvironment())){
            try{
            alipayConfig.setAppCertPath(ClassLoader.getSystemResource(alibabaProperties.getAppCertPath()).getPath());
            alipayConfig.setAlipayPublicCertPath(ClassLoader.getSystemResource(alibabaProperties.getPublicCertPath()).getPath());
            alipayConfig.setRootCertPath(ClassLoader.getSystemResource(alibabaProperties.getRootCertPath()).getPath());
            }catch (Exception e){
                log.error("秘钥位置不正确:{}" , e.getMessage());
                throw BaseException.throwExNotLog(e.getMessage());
            }
        }else{
            alipayConfig.setAppCertPath(alibabaProperties.getAppCertPath());
            alipayConfig.setAlipayPublicCertPath(alibabaProperties.getPublicCertPath());
            alipayConfig.setRootCertPath(alibabaProperties.getRootCertPath());
        }
        alipayConfig.setFormat(alibabaProperties.getFormat());
        alipayConfig.setCharset(alibabaProperties.getCharset());
        alipayConfig.setSignType(alibabaProperties.getSignType());
        AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
        request.setNotifyUrl(alibabaProperties.getNotifyUrl());
        request.setBizContent(JSONObject.toJSONString(payEntity.setProductCode(alibabaProperties.getProductCode())));
        try{
            AlipayTradeAppPayResponse response = new DefaultAlipayClient(alipayConfig).sdkExecute(request);
            if(response.isSuccess()) return response.getBody();
            throw BaseException.throwEx(JSONObject.toJSONString(response));
        }catch (Exception e){
            log.error("支付宝支付失败:{}" , e.getMessage());
            throw BaseException.throwEx(e.getMessage());
        }
    }


    public Boolean sign(Map<String , String> params) throws Exception{
        if(ProjectStatus.linux操作系统.getValue().equals(alibabaProperties.getEnvironment())) return AlipaySignature.rsaCertCheckV1(params , alibabaProperties.getPublicCertPath() , alibabaProperties.getCharset() , alibabaProperties.getSignType());
        return AlipaySignature.rsaCertCheckV1(params , ClassLoader.getSystemResource(alibabaProperties.getPublicCertPath()).getPath() , alibabaProperties.getCharset() , alibabaProperties.getSignType());
    }

}