java接入第三方支付宝接口

注册沙箱账号

到蚂蚁金服注册开发者账号，注册地址：https://open.alipay.com，用你的支付宝账号扫码登录，完善个人信息，选择服务类型。

根据情况选择接入方式，我们这里选择自研开发者，如果已经注册过的省略。

选择开发者中心 --> 研发服务 --> 沙箱，进入沙箱管理界面。

进入沙箱，第一次需要填写信息，记下appId，公钥设置处需要把下面步骤生成的公钥设置到这里。

生成公私秘钥

登录官方地址: https://docs.open.alipay.com/291/105971，进入秘钥生成页面。

打开下载的工具，运行程序，选择 JAVA 2048 方式，点击生成秘钥。

把此处生成的公钥复制设置到沙箱环境，就是上面的设置公钥配置，然后把公私秘钥保存起来，以备后用。

创建项目

使用开发工具导入项目，我们这里使用的是 Eclipse ，导入和清理后项目结构如下图。

添加依赖

添加项目依赖，主要是引入 alipay-sdk-java，提供支付宝支付支持。

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.1.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.louis</groupId><artifactId>epay-service</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>epay-service</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- alipay --><dependency>    <groupId>com.alipay.sdk</groupId><artifactId>alipay-sdk-java</artifactId><version>3.1.0</version></dependency><!-- fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.48</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

配置文件

在 resources 目录下添加一个 alipay.properties 文件，用于写入支付宝配置信息。

alipay.properties

# 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号
appId: 2016092300579321
# 商户私钥，您的PKCS8格式RSA2私钥
privateKey: 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
# 支付宝公钥,查看地址：https://openhome.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
publicKey: MIIBIjANBnbqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApEW1RBR8T5Je+eIcM+MPYq2gOth9/xo2ekcB2vvCwctpjToPPSGqHQFHffaI2BA4J1cYPFPUYVxeAjrJukPgD8u2KQqbuRib+l/RyWC14n8sXOYH6+PAnUeiUA8dkef2qjK6NA3evUdxzrmY+a3LaVR7O4CL7Ep+T1edzgjoCxFs27XGNwyi5Acnr5qF1XZwQx0WSqr9R+jfIvN2MzUVcen69yB2RoiMVW7hB1J+Yk9RQQK0Fbhy5IuSWjOp8FkCAtmtE9mKJKdZI6oRaDadPLIA2Z5RLUD/Uo6HkDK1jtJhSOyW96KDC6icDbHc8tAcKJ4dM365bT8M2HLNnfb07QIDAQAB
# 服务器异步通知页面路径需http://格式的完整路径，不能加?id=123这类自定义参数
notifyUrl: http://外网ip:端口/error.html
# 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数
returnUrl: http://外网ip:端口/sccess.html
# 签名方式
signType: RSA2
# 字符编码格式
charset: utf-8
# 支付宝网关
gatewayUrl: https://openapi.alipaydev.com/gateway.do
# 支付宝网关
logPath: "C:\\"

增加一个 PropertiesListener 监听器用于在应用启动时加载配置文件属性。

PropertiesListener.java

package com.louis.epay.config;import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;import com.louis.epay.alipay.AlipayProperties;/*** 配置文件监听器，用来加载自定义配置文件* @author Louis* @date Dec 12, 2018*/
@Component
public class PropertiesListener implements ApplicationListener<ApplicationStartedEvent> {@Overridepublic void onApplicationEvent(ApplicationStartedEvent event) {AlipayProperties.loadProperties();}
}

上面的监听器加载属性，是通过具体的属性加载器加载的，比如支付宝支付属性加载类如下。

AlipayProperties.java

package com.louis.epay.alipay;import java.util.HashMap;
import java.util.Map;
import java.util.Properties;import org.springframework.beans.factory.config.PropertiesFactoryBean;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.stereotype.Component;/*** 应用启动加载文件* @author Louis* @date Dec 12, 2018*/
@Component
public class AlipayProperties {public static final String APP_ID = "appId";public static final String PRIVARY_KEY = "privateKey";public static final String PUBLIC_KEY = "publicKey";public static final String NOTIFY_URL = "notifyUrl";public static final String RETURN_URL = "returnUrl";public static final String SIGN_TYPE = "signType";public static final String CHARSET = "charset";public static final String GATEWAY_URL = "gatewayUrl";public static final String LOG_PATH = "logPath";/*** 保存加载配置参数*/private static Map<String, String> propertiesMap = new HashMap<String, String>();/*** 加载属性*/public static void loadProperties() {// 获得PathMatchingResourcePatternResolver对象PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();try {// 加载resource文件(也可以加载resources)Resource resources = resolver.getResource("classpath:alipay.properties");PropertiesFactoryBean config = new PropertiesFactoryBean();config.setLocation(resources);config.afterPropertiesSet();Properties prop = config.getObject();// 循环遍历所有得键值对并且存入集合for (String key : prop.stringPropertyNames()) {propertiesMap.put(key, (String) prop.get(key));}} catch (Exception e) {new Exception("配置文件加载失败");}}/*** 获取配置参数值* @param key* @return*/public static String getKey(String key) {return propertiesMap.get(key);}public static String getAppId() {return propertiesMap.get(APP_ID);}public static String getPrivateKey() {return propertiesMap.get(PRIVARY_KEY);}public static String getPublicKey() {return propertiesMap.get(PUBLIC_KEY);}public static String getNotifyUrl() {return propertiesMap.get(NOTIFY_URL);}public static String getReturnUrl() {return propertiesMap.get(RETURN_URL);}public static String getSignType() {return propertiesMap.get(SIGN_TYPE);}public static String getCharset() {return propertiesMap.get(CHARSET);}public static String getGatewayUrl() {return propertiesMap.get(GATEWAY_URL);}public static String getLogPath() {return propertiesMap.get(LOG_PATH);}}

支付宝支付接口封装

Alipay 是对支付宝支付功能的封装，它接收一个 AlipayBean 为参数，最终通过调用 AlipayClient 的 pageExecute 方法返回支付页面。

Alipay.java

package com.louis.epay.alipay;import org.springframework.stereotype.Component;import com.alibaba.fastjson.JSON;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;/*** 支付宝支付接口* @author Louis* @date Dec 12, 2018*/
@Component
public class Alipay {/*** 支付接口* @param alipayBean* @return* @throws AlipayApiException*/public String pay(AlipayBean alipayBean) throws AlipayApiException {// 1、获得初始化的AlipayClientString serverUrl = AlipayProperties.getGatewayUrl();String appId = AlipayProperties.getAppId();String privateKey = AlipayProperties.getPrivateKey();String format = "json";String charset = AlipayProperties.getCharset();String alipayPublicKey = AlipayProperties.getPublicKey();String signType = AlipayProperties.getSignType();String returnUrl = AlipayProperties.getReturnUrl();String notifyUrl = AlipayProperties.getNotifyUrl();AlipayClient alipayClient = new DefaultAlipayClient(serverUrl, appId, privateKey, format, charset, alipayPublicKey, signType);// 2、设置请求参数AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();// 页面跳转同步通知页面路径alipayRequest.setReturnUrl(returnUrl);// 服务器异步通知页面路径alipayRequest.setNotifyUrl(notifyUrl);// 封装参数alipayRequest.setBizContent(JSON.toJSONString(alipayBean));// 3、请求支付宝进行付款，并获取支付结果String result = alipayClient.pageExecute(alipayRequest).getBody();// 返回付款信息return result;}
}

接口调用参数封装对象如下。

AlipayBean.java

package com.louis.epay.alipay;/*** 支付实体对象* 根据支付宝接口协议，其中的属性名，必须使用下划线，不能修改* @author Louis* @date Dec 12, 2018*/
public class AlipayBean {/*** 商户订单号，必填* */private String out_trade_no;/*** 订单名称，必填*/private String subject;/*** 付款金额，必填* 根据支付宝接口协议，必须使用下划线*/private String total_amount;/*** 商品描述，可空*/private String body;/*** 超时时间参数*/private String timeout_express= "10m";/*** 产品编号*/private String product_code= "FAST_INSTANT_TRADE_PAY";public String getOut_trade_no() {return out_trade_no;}public void setOut_trade_no(String out_trade_no) {this.out_trade_no = out_trade_no;}public String getSubject() {return subject;}public void setSubject(String subject) {this.subject = subject;}public String getTotal_amount() {return total_amount;}public void setTotal_amount(String total_amount) {this.total_amount = total_amount;}public String getBody() {return body;}public void setBody(String body) {this.body = body;}public String getTimeout_express() {return timeout_express;}public void setTimeout_express(String timeout_express) {this.timeout_express = timeout_express;}public String getProduct_code() {return product_code;}public void setProduct_code(String product_code) {this.product_code = product_code;}}

订单业务封装

订单业务提供支付宝支付接口 alipay，内部通过调用 PayService 完成订单支付。

OrderController.java

package com.louis.epay.controller;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import com.alipay.api.AlipayApiException;
import com.louis.epay.alipay.AlipayBean;
import com.louis.epay.service.PayService;/*** 订单接口* * @author Louis* @date Dec 12, 2018*/
@RestController()
@RequestMapping("order")
public class OrderController {@Autowiredprivate PayService payService;/*** 阿里支付* @param tradeNo* @param subject* @param amount* @param body* @return* @throws AlipayApiException*/@PostMapping(value = "alipay")public String alipay(String outTradeNo, String subject, String totalAmount, String body) throws AlipayApiException {AlipayBean alipayBean = new AlipayBean();alipayBean.setOut_trade_no(outTradeNo);alipayBean.setSubject(subject);alipayBean.setTotal_amount(totalAmount);alipayBean.setBody(body);return payService.aliPay(alipayBean);}
}

PayService 封装了 Alipay, 统一对外提供的支付服务接口。

PayService.java

package com.louis.epay.service;import com.alipay.api.AlipayApiException;
import com.louis.epay.alipay.AlipayBean;/*** 支付服务* @author Louis* @date Dec 12, 2018*/
public interface PayService {/*** 支付宝支付接口* @param alipayBean* @return* @throws AlipayApiException*/String aliPay(AlipayBean alipayBean) throws AlipayApiException;}

支付服务的实现类，通过对各种支付代码的调用，统一对外提供支付服务。

PayServiceImpl.java

package com.louis.epay.service.impl;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.alipay.api.AlipayApiException;
import com.louis.epay.alipay.Alipay;
import com.louis.epay.alipay.AlipayBean;
import com.louis.epay.service.PayService;@Service
public class PayServiceImpl implements PayService {@Autowiredprivate Alipay alipay;@Overridepublic String aliPay(AlipayBean alipayBean) throws AlipayApiException {return alipay.pay(alipayBean);}}

启动类没什么，有启动器注解就可以了。

EpayApplication.java

package com.louis.epay;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class EpayApplication {public static void main(String[] args) {SpringApplication.run(EpayApplication.class, args);}
}

测试页面

在 static 目录下创建一个 index.html 页面，用于输入订单信息，并进行支付。

index.html

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<H1>支付测试</H1>
<hr>
<div class="form-container"><form id="form" action="order/alipay" method="post">*商户订单 :<input type="text" name="outTradeNo" value="dzcp100010001"><br>*订单名称 :<input type="text" name="subject" value="红魔手机"><br>*付款金额 :<input type="text" name="totalAmount" value="0.1" ><br>*商品描述 :<input type="text" name="body" value="红魔手机 努比亚出品游戏手机"><br><input type="button" value="支付宝支付" onclick="submitForm('order/alipay')"> <input type="button" value=" 微信支付  " onclick="submitForm('order/wexpay')"> </form>
</div>
</body><script language="javascript">
function submitForm(action) {document.getElementById("form").action = actiondocument.getElementById("form").submit()
}
</script><style>
.form-container {padding-top:10px;
}
input {margin:10px;}
</style>
</html>

测试效果

根据需要修改启动端口，我这里调整为 9000。

application.yml

server:port: 9000

访问地址： http://localhost:9000/，显示订单支付页面。

点击支付宝支付，调用 order/alipay 接口，如果调用成功，则返回支付宝支付页面。

到此，支付宝支付的实现案例就完成了。