Java第三方支付接入案例（支付宝）

朝雨忆轻尘

发布于 2019-06-19 15:13:15

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发布于 2019-06-19 15:13:15

文章被收录于专栏：朝雨忆轻尘朝雨忆轻尘

开源项目链接

Kitty 开源权限管理系统

项目地址：https://gitee.com/liuge1988/kitty

演示地址：http://139.196.87.48:9002/kitty

用户名：admin 密码：admin

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: MIIEvgIBADANBgkcbkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCkRbVEFHxPkl754hwz4w9iraA62H3/GjZ6RwHa+8LBy2mNOg89IaodAUd99ojYEDgnVxg8U9RhXF4COsm6Q+APy7YpCpu5GJv6X9HJYLXifyxc5gfr48CdR6JQDx2R5/aqMro0Dd69R3HOuZj5rctpVHs7gIvsSn5PV53OCOgLEWzbtcY3DKLkByevmoXVdnBDHRZKqv1H6N8i83YzNRVx6fr3IHZGiIxVbuEHUn5iT1FBArQVuHLki5JaM6nwWQIC2a0T2Yokp1kjqhFoNp08sgDZnlEtQP9SjoeQMrWO0mFI7Jb3ooMLqJwNsdzy0Bwonh0zfrltPwzYcs2d9vTtAgMBAAECggEAW+Kp+8TBq/ihq4Bwag2N45Je18uU3oaZBliFjynXzHKtPdPGBlm4P7UhejHWZZTc9BRheA0j9Lmn0/NyNwAUaoF2CQroA+biCHBkdhHkaybbd7MrpySj7tXM0p9B2QU5EgaB5PAFMTavUAS8rpwp9WbN74B9w9P/Rv4pRL/ym41iYVxFJ3r59GDOZ/GMYzcNrFi3Io5I7LSPBR/DP2XR/Z0V2ahZ5cVBxea0rIDum+veioknLmwglzmxI9/V8C+PkgryjsfokTlH2FWx+XBbhzfcelCq50QLdHSSLAR4u2kuWv1aiswNYBaEFJ7Ir0TUCa4rYzVUkfHb1W4wTHSYwQKBgQDo7btJatR/QfI0c+TmVVcoHdS9QimcJq5dDhccePH7ocHmK5NDabtB1UgzUBHTg/ePNWhrFzuFSV3GN3XZAMkxRNA5YxBnd9R27cI8zzo9ph+BRgInc79usKE4uM1kt3s/8+Tdlx8mMh31ssxy3PrznBec9W663Uz/tpxM/WanlQKBgQC0ixaHjdP8eW7Hrdj8KnBeHqxsrQMUfH37/LTZcnbvuIDGaFCntYTR3C0HjoOIi7mbbIV584A3nxoEhfSt+fTo6GxHHCkF5TIE2ewsCWOxrMGKhoPWibuJZOe+qBXTICaOCR80sKa5zHu3zkjymQcKBxHiLtVgbwW/CLYSt4Th+QKBgQDaps84i+AN1YnXUzN8RIAcWGRrhMAqpOTo1WE8iQweeinaNu12SrpNgjjUckVJmIe7Fxd978EfzU8J0uX9Xo9+gGo2dJfhiMsZGPdMvfqeBGNuppk/D5iT/5pX9KJZ+SLpVblxiXrkEAevrLfe2zF3nP9Nh9b58uNk57axTu4eQQKBgE83yEbqQF3DmowbB959cJibtORqdbODfHQYyfGve+hreHWWR+2OhBzhExEBw00ioepEj7yWz2eYc/4QGPBNgNzBPuFkxctEadIfHLWl2QyY1MNHiomUHamHkPfjINBmhwRDlGG2MTHNO2vHI9Luulv4BizMh+usS0UrOVi1FaVhAoGBAJGhjac7FODXn2cDQY4Rqf0cw8wUy4+XISRlHfRBt51mogZ/9xyfY4A/S5bkKwpzMAXtaF4r6URYj4tP5wFE48ANepHVDnXs4Bj/x+/NsgbLyiK0Mo2fL2WchYxWym8pzsifvWvrxWVI5pGtJRVl0xKN9KsJjwfRsFKS0YSzM0av
# 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> {

    @Override
    public 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AlipayClient
        String 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 {

    @Autowired
    private 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 {

    @Autowired
    private Alipay alipay;
    
    @Override
    public 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 = action
    document.getElementById("form").submit()
}
</script>

<style>
.form-container {
    padding-top:10px;
}
input {
    margin:10px;
    
}
</style>
</html>