本文主要是介绍spring boot kotlin 支付宝支付，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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
alipay_url=https://openapi.alipay.com/gateway.doapp_id=appidapp_private_key=你得私钥return_payment_url=http://api.gmall.com/api/payment/alipay/callback/returnnotify_payment_url=https://域名/api/notifyreturn_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
package com.kotlin.bank.config.propertiesimport 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@Autowiredprivate val resourceLoader: ResourceLoader? = nullcompanion object {var return_payment_url: String? = nullvar notify_payment_url: String? = nullvar return_order_url: String? = nullvar alipay_public_key: String? = nullval format = "json"val charset = "utf-8"val sign_type = "RSA2"var alipayClient:AlipayClient?=nullvar alipayCertPublicKeyPath=""var appCertPublicKeyPath=""var alipayRootCertPath=""fun getTempFileFromResource(resourcePath: String,fileName:String): File {val inputStream: InputStream = ClassPathResource("$resourcePath").inputStreamval tempFile = File.createTempFile("$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").absolutePathappCertPublicKeyPath =getTempFileFromResource("signature/appCertPublicKey_2021004166633226.crt","appCertPublicKey_2021004166633226").absolutePathalipayRootCertPath = 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>@Beanfun 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AlipayClientval certAlipayRequest = CertAlipayRequest()certAlipayRequest.serverUrl = "https://openapi.alipay.com/gateway.do"certAlipayRequest.appId = app_idcertAlipayRequest.privateKey = app_private_keycertAlipayRequest.format = "json"certAlipayRequest.charset = "GBK"certAlipayRequest.signType = "RSA2"
// var file:File = File();// 使用 InputStream 加载证书文件certAlipayRequest.certPath =appCertPublicKeyPathcertAlipayRequest.alipayPublicCertPath = alipayCertPublicKeyPathcertAlipayRequest.rootCertPath = alipayRootCertPathalipayClient= 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
@Service
class AlipayService{@Autowiredprivate val alipayClient: AlipayClient? = null@Autowiredprivate val alipayClient: AlipayClient? = nulloverride 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 10000map["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_nomodel.outTradeNo = trade_norequest.bizModel = modelval 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
//支付类
@RestController
@RequestMapping("/api")
class AlipayController {@Autowiredvar 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"]=numberjson["from"]=fromreturn json}//支付状态通知 @RequestMapping("notify")@ResponseBodyfun 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_statusif ("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。
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