spring boot kotlin 支付宝支付

前边哪些注册的支付宝账号的略过。

这个首先是在什么账号证书都申请完了之后。那就开始吧！

第一步添加支付宝依赖

<dependency>
     <groupId>com.alipay.sdk</groupId>
         <artifactId>alipay-sdk-java</artifactId>
      <version>4.34.0.ALL</version>
</dependency>

  <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.16</version>
  </dependency>

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.35</version>
</dependency>

先在resources下边创建一个 alipay.properties

Kotlin 复制代码

alipay_url=https://openapi.alipay.com/gateway.do

app_id=appid

app_private_key=你得私钥




return_payment_url=http://api.gmall.com/api/payment/alipay/callback/return

notify_payment_url=https://域名/api/notify

return_order_url=http://payment.gmall.com/pay/success.html

具体参数可参考阿里文档

支付配置类，启动就加载 AlipayConfig.kt

Kotlin 复制代码

package com.kotlin.bank.config.properties

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.context.annotation.PropertySource
import org.springframework.core.io.ClassPathResource
import org.springframework.core.io.ResourceLoader
import java.io.File
import java.io.InputStream
import java.nio.file.Files

@Configuration
@PropertySource("classpath:alipay.properties")
class AlipayConfig {


    @Value("\${alipay_url}")
    private val alipay_url: String? = null

    @Value("\${app_private_key}")
    private val app_private_key: String? = null



    @Value("\${app_id}")
    private val app_id: String? = null

    @Autowired
    private val resourceLoader: ResourceLoader? = null

    companion object {

        var return_payment_url: String? = null

        var notify_payment_url: String? = null

        var return_order_url: String? = null

        var alipay_public_key: String? = null

        val format = "json"
        val charset = "utf-8"
        val sign_type = "RSA2"
        var  alipayClient:AlipayClient?=null


        var alipayCertPublicKeyPath=""
        var appCertPublicKeyPath=""
        var alipayRootCertPath=""


        fun getTempFileFromResource(resourcePath: String,fileName:String): File {
            val inputStream: InputStream = ClassPathResource("$resourcePath").inputStream
            val tempFile = File.createTempFile("$fileName", ".crt")
            tempFile.deleteOnExit() // JVM 退出时删除临时文件
            Files.copy(inputStream, tempFile.toPath(), java.nio.file.StandardCopyOption.REPLACE_EXISTING)
            return tempFile
        }


    }

    init {

        alipayCertPublicKeyPath =      getTempFileFromResource("signature/alipayCertPublicKey_RSA2.crt","alipayCertPublicKey_RSA2").absolutePath
        appCertPublicKeyPath =getTempFileFromResource("signature/appCertPublicKey_2021004166633226.crt","appCertPublicKey_2021004166633226").absolutePath
        alipayRootCertPath = getTempFileFromResource("signature/alipayRootCert.crt","alipayRootCert").absolutePath
    }










    @Value("\${alipay_public_key}")
    fun setAlipay_public_key(alipay_public_key: String) {
        Companion.alipay_public_key = alipay_public_key
    }

    @Value("\${return_payment_url}")
    fun setReturn_url(return_payment_url: String) {
        Companion.return_payment_url = return_payment_url
    }

    @Value("\${notify_payment_url}")
    fun setNotify_url(notify_payment_url: String) {
        Companion.notify_payment_url = notify_payment_url
    }

    @Value("\${return_order_url}")
    fun setReturn_order_url(return_order_url: String) {
        Companion.return_order_url = return_order_url
    }

    // <bean id="alipayClient" class="com.alipay.api.AlipayClient"> </bean>
    @Bean
    fun alipayClient(): AlipayClient? {
        // AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do", APP_ID, APP_PRIVATE_KEY, FORMAT, CHARSET, ALIPAY_PUBLIC_KEY, SIGN_TYPE); //获得初始化的AlipayClient

        val certAlipayRequest = CertAlipayRequest()
        certAlipayRequest.serverUrl = "https://openapi.alipay.com/gateway.do"
        certAlipayRequest.appId = app_id
        certAlipayRequest.privateKey = app_private_key
        certAlipayRequest.format = "json"
        certAlipayRequest.charset = "GBK"
        certAlipayRequest.signType = "RSA2"
//        var file:File = File();
        // 使用 InputStream 加载证书文件


        certAlipayRequest.certPath =appCertPublicKeyPath
        certAlipayRequest.alipayPublicCertPath = alipayCertPublicKeyPath
        certAlipayRequest.rootCertPath = alipayRootCertPath
        alipayClient= DefaultAlipayClient(certAlipayRequest)
        return alipayClient
    }


}

@Configuration设置这个之后 tomcat启动就会加载，无需手动启动或者手动调用

可能会有别人有疑问 signature/下边的文件在哪里，这是我在resources下边创建一个文件夹下边放的证书，因为我是个体户所以使用的证书验证，这样打包之后就不用担心证书的文件位置

第二步写支付相关的方法

创建Service

Kotlin 复制代码

@Service
class AlipayService{
   
   @Autowired
    private val alipayClient: AlipayClient? = null
 
  @Autowired
    private val alipayClient: AlipayClient? = null
    override fun createaliPay(orderId: String?, money: Double, info: String): String? {
        // 生产二维码
        val alipayRequest = AlipayTradePagePayRequest()

        // 同步回调
        alipayRequest.returnUrl = AlipayConfig.return_payment_url
        // 异步回调
        alipayRequest.notifyUrl = AlipayConfig.notify_payment_url //在公共参数中设置回跳和通知地址

        // 声明一个map 集合
        val map = HashMap<String, Any>()
        //订单交易编号
        map["out_trade_no"] = orderId!!
        map["product_code"] = "FAST_INSTANT_TRADE_PAY"
        //要支付的金额
        map["total_amount"] = if (money > 0) money else 10000
        map["subject"] =if (!TextUtils.isEmpty(info)) info else "123"

        alipayRequest.bizContent = JSON.toJSONString(map)

        return alipayClient!!.pageExecute(alipayRequest).body //调用SDK生成表单;

    }

    //根据订单号查询 这个有个问题，如果订单不是待支付或者支付成功或者订单失败查不到的，也就是创建好支付界面，是查不到的
  fun getPay(trade_no:String):Int{
        val request = AlipayTradeQueryRequest()
        val model = AlipayTradeQueryModel()
//        model.tradeNo = trade_no
        model.outTradeNo = trade_no
        request.bizModel = model
        val response = alipayClient!!.certificateExecute(request)
        println(response?.body)
        if (response!!.isSuccess) {
         var  trade_status=  JSONObject(response.body.toString()) .getJSONObject("alipay_trade_query_response").getString("trade_status")
            if(trade_status== "TRADE_SUCCESS"){
                return 1
            }
            println("调用成功")
        } else {
            println("调用失败")
 
        }

        return 0
    }

}

创建Controller

Kotlin 复制代码

//支付类
@RestController
@RequestMapping("/api")
class AlipayController {

    @Autowired
    var orderPlayService:OrderPlayService?=null
    
//创建支付订单
@RequestMapping("/alipay")
    fun  getAliPayOrder(@RequestBody orderPayEntity: OrderPayEntity):JSONObject{
        var from: String? = ""
        var number=Utils.generateAlipayOrderNumber()
        try {
            from = alipayService!!.createaliPay(number,orderPayEntity.price,"")
        } catch (e: AlipayApiException) {
            e.printStackTrace()
        }
        println(from)
        var json=JSONObject();
        json["orderNumber"]=number
        json["from"]=from
           
        return json
        }

//支付状态通知 
  @RequestMapping("notify")
    @ResponseBody
    fun alipayNotify(@RequestParam paramMap: Map<String?, String?>): String {
        println("回来了！${AlipayConfig.alipay_public_key}")
        var signVerified = false //调用SDK验证签名

        // 首先检查 paramMap 是否为空
        if (paramMap.isEmpty()) {
            return "failure"
        }

        try {
            var resource =AlipayConfig.alipayCertPublicKeyPath
            // 调用 SDK 的验签方法进行验签
            signVerified = AlipaySignature.rsaCertCheckV1(
                    paramMap as Map<String, String>,
                    resource,
                    AlipayConfig.charset,
                    AlipayConfig.sign_type
            )
            println("返回了什么:${signVerified}")
        } catch (e: AlipayApiException) {
            e.printStackTrace()
            println("错误${e.printStackTrace()}")
        }

        println("支付回调答应${paramMap}")

        // 交易状态
        val trade_status = paramMap["trade_status"]
        val out_trade_no = paramMap["out_trade_no"]


        println("验签${signVerified}")

        if (signVerified) {
            // TODO 验签成功后，按照支付结果异步通知中的描述，对支付结果中的业务内容进行二次校验，校验成功后在response中返回success并继续商户自身业务处理，校验失败返回failure
            //|| "TRADE_FINISHED" == trade_status
            if ("TRADE_SUCCESS" == trade_status ) {
              
                // TODO 处理支付成功的业务逻辑
                return "success"
            }
        } else {
            // TODO 验签失败则记录异常日志，并在response中返回failure.
            return "failure"
        }

        return "failure"
    }

//退款之内的我后边会补上

}

到这里就差不多了，集成完成了，应该访问就可以看到支付界面。希望能帮到你。