最详细的 paypal 支付接口开发--Java版

作全球性的支付，选用paypal！为何选择paypal？ 由于paypal是目前全球最大的在线支付工具，就像国内的支付宝同样，是一个基于买卖双方的第三方平台。买家只需知道你的paypal帐号，便可在线直接把钱汇入你的帐户，即时到帐，简单方便快捷。

 在集成paypal支付接口以前，首先要有一系列的准备，开发者帐号啊、sdk、测试环境等等先要有，而后再码代码。集成的步骤以下：

1、环境准备

• 注册paypal帐号

• 注册paypal开发者帐号

• 建立两个测试用户

• 建立应用，生成用于测试的clientID 和 密钥

2、代码集成

• springboot环境

• pom引进paypal-sdk的jar包

• 码代码

• 测试

• 后言  

 

如今开始

 

• 注册paypal帐号

（1）在浏览器输入“https://www.paypal.com” 跳转到以下界面，点击右上角的注册 

（2）选择，”建立商家用户”，根据要求填写信息，一分钟的事，注册完得去邮箱激活

 

• 注册paypal开发者帐号 
  
  
  （1）在浏览器输入“https://developer.paypal.com”，点击右上角的“Log into Dashboard”，用上一步建立好的帐号登陆

 

• 建立两个测试用户 
  
  

（1）登陆成功后，在左边的导航栏中点击 Sandbox 下的 Accounts

 

（2）进入Acccouts界面后，能够看到系统有两个已经生成好的测试帐号，可是咱们不要用系统给的测试帐号，很卡的，本身建立两个 

（3）点击右上角的“Create Account”，建立测试用户 

<1> 先建立一个“ PERSONAL”类型的用户，国家必定要选“China”，帐户余额本身填写 

 


 

<2> 接着建立一个“BUSINESS”类型的用户，国家必定要选“China”，帐户余额本身填写 

<3>建立好以后能够点击测试帐号下的”Profile“，能够查看信息，若是没加载出来，刷新 

<4>用测试帐号登陆测试网站查看，注意！这跟paypal官网不一样！不是同一个地址，在浏览器输入：https://www.sandbox.paypal.com 在这里登录测试帐户

 

• 建立应用，生成用于测试的clientID 和 密钥 
  
  
  （1）点击左边导航栏Dashboard下的My Apps & Credentials，建立一个Live帐号，下图是我已经建立好的 
  
  

（2）而后再到下边建立App

这是我建立好的“Test”App 

（3）点击刚刚建立好的App“Test”，注意看到”ClientID“ 和”Secret“(Secret若是没显示，点击下面的show就会看到，点击后show变为hide) 

 

• springboot环境搭建 
  
  
  （1）新建几个包，和目录，项目结构以下 
  
  

 

• pom引进paypal-sdk的jar包 
  
  
  （1）pom.xml

<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> <groupId>com.masasdani</groupId> <artifactId>paypal-springboot</artifactId> <version>0.0.1-SNAPSHOT</version> <name>paypal-springboot</name> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>http://repo.spring.io/libs-milestone</url> </repository> <repository> <id>jcenter-snapshots</id> <name>jcenter</name> <url>https://jcenter.bintray.com/</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>http://repo.spring.io/libs-milestone</url> </pluginRepository> </pluginRepositories> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.3.0.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.7</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-thymeleaf</artifactId> </dependency> <dependency> <groupId>com.paypal.sdk</groupId> <artifactId>rest-api-sdk</artifactId> <version>1.4.2</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>${java.version}</source> <target>${java.version}</target> </configuration> </plugin> </plugins> </build> </project>

 

• 码代码 
  
  
  （1）Application.java

package com.masasdani.paypal; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; @EnableAutoConfiguration @Configuration @ComponentScan public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }

（2）PaypalConfig.java

package com.masasdani.paypal.config; import java.util.HashMap; import java.util.Map; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import com.paypal.base.rest.APIContext; import com.paypal.base.rest.OAuthTokenCredential; import com.paypal.base.rest.PayPalRESTException; @Configuration public class PaypalConfig { @Value("${paypal.client.app}") private String clientId; @Value("${paypal.client.secret}") private String clientSecret; @Value("${paypal.mode}") private String mode; @Bean public Map<String, String> paypalSdkConfig(){ Map<String, String> sdkConfig = new HashMap<>(); sdkConfig.put("mode", mode); return sdkConfig; } @Bean public OAuthTokenCredential authTokenCredential(){ return new OAuthTokenCredential(clientId, clientSecret, paypalSdkConfig()); } @Bean public APIContext apiContext() throws PayPalRESTException{ APIContext apiContext = new APIContext(authTokenCredential().getAccessToken()); apiContext.setConfigurationMap(paypalSdkConfig()); return apiContext; } }

（3）PaypalPaymentIntent.java

package com.masasdani.paypal.config; public enum PaypalPaymentIntent { sale, authorize, order }

（4）PaypalPaymentMethod.java

package com.masasdani.paypal.config; public enum PaypalPaymentMethod { credit_card, paypal }

（5）PaymentController.java

package com.masasdani.paypal.controller; import javax.servlet.http.HttpServletRequest; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import com.masasdani.paypal.config.PaypalPaymentIntent; import com.masasdani.paypal.config.PaypalPaymentMethod; import com.masasdani.paypal.service.PaypalService; import com.masasdani.paypal.util.URLUtils; import com.paypal.api.payments.Links; import com.paypal.api.payments.Payment; import com.paypal.base.rest.PayPalRESTException; @Controller @RequestMapping("/") public class PaymentController { public static final String PAYPAL_SUCCESS_URL = "pay/success"; public static final String PAYPAL_CANCEL_URL = "pay/cancel"; private Logger log = LoggerFactory.getLogger(getClass()); @Autowired private PaypalService paypalService; @RequestMapping(method = RequestMethod.GET) public String index(){ return "index"; } @RequestMapping(method = RequestMethod.POST, value = "pay") public String pay(HttpServletRequest request){ String cancelUrl = URLUtils.getBaseURl(request) + "/" + PAYPAL_CANCEL_URL; String successUrl = URLUtils.getBaseURl(request) + "/" + PAYPAL_SUCCESS_URL; try { Payment payment = paypalService.createPayment( 500.00, "USD", PaypalPaymentMethod.paypal, PaypalPaymentIntent.sale, "payment description", cancelUrl, successUrl); for(Links links : payment.getLinks()){ if(links.getRel().equals("approval_url")){ return "redirect:" + links.getHref(); } } } catch (PayPalRESTException e) { log.error(e.getMessage()); } return "redirect:/"; } @RequestMapping(method = RequestMethod.GET, value = PAYPAL_CANCEL_URL) public String cancelPay(){ return "cancel"; } @RequestMapping(method = RequestMethod.GET, value = PAYPAL_SUCCESS_URL) public String successPay(@RequestParam("paymentId") String paymentId, @RequestParam("PayerID") String payerId){ try { Payment payment = paypalService.executePayment(paymentId, payerId); if(payment.getState().equals("approved")){ return "success"; } } catch (PayPalRESTException e) { log.error(e.getMessage()); } return "redirect:/"; } }

（6）PaypalService.java

package com.masasdani.paypal.service; import java.util.ArrayList; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.masasdani.paypal.config.PaypalPaymentIntent; import com.masasdani.paypal.config.PaypalPaymentMethod; import com.paypal.api.payments.Amount; import com.paypal.api.payments.Payer; import com.paypal.api.payments.Payment; import com.paypal.api.payments.PaymentExecution; import com.paypal.api.payments.RedirectUrls; import com.paypal.api.payments.Transaction; import com.paypal.base.rest.APIContext; import com.paypal.base.rest.PayPalRESTException; @Service public class PaypalService { @Autowired private APIContext apiContext; public Payment createPayment( Double total, String currency, PaypalPaymentMethod method, PaypalPaymentIntent intent, String description, String cancelUrl, String successUrl) throws PayPalRESTException{ Amount amount = new Amount(); amount.setCurrency(currency); amount.setTotal(String.format("%.2f", total)); Transaction transaction = new Transaction(); transaction.setDescription(description); transaction.setAmount(amount); List<Transaction> transactions = new ArrayList<>(); transactions.add(transaction); Payer payer = new Payer(); payer.setPaymentMethod(method.toString()); Payment payment = new Payment(); payment.setIntent(intent.toString()); payment.setPayer(payer); payment.setTransactions(transactions); RedirectUrls redirectUrls = new RedirectUrls(); redirectUrls.setCancelUrl(cancelUrl); redirectUrls.setReturnUrl(successUrl); payment.setRedirectUrls(redirectUrls); return payment.create(apiContext); } public Payment executePayment(String paymentId, String payerId) throws PayPalRESTException{ Payment payment = new Payment(); payment.setId(paymentId); PaymentExecution paymentExecute = new PaymentExecution(); paymentExecute.setPayerId(payerId); return payment.execute(apiContext, paymentExecute); } }

（7）URLUtils.java

package com.masasdani.paypal.util; import javax.servlet.http.HttpServletRequest; public class URLUtils { public static String getBaseURl(HttpServletRequest request) { String scheme = request.getScheme(); String serverName = request.getServerName(); int serverPort = request.getServerPort(); String contextPath = request.getContextPath(); StringBuffer url = new StringBuffer(); url.append(scheme).append("://").append(serverName); if ((serverPort != 80) && (serverPort != 443)) { url.append(":").append(serverPort); } url.append(contextPath); if(url.toString().endsWith("/")){ url.append("/"); } return url.toString(); } }

（8）cancel.html

<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>Insert title here</title> </head> <body> <h1>Canceled by user</h1> </body> </html>

（9）index.html

<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>Insert title here</title> </head> <body> <form method="post" th:action="@{/pay}"> <button type="submit"><img src="images/paypal.jpg" width="100px;" height="30px;"/></button> </form> </body> </html>

（10）success.html

<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>Insert title here</title> </head> <body> <h1>Payment Success</h1> </body> </html>

（11）最重要的！application.properties,paypal.client.app是App的CilentID， paypal.client.secret是Secret

server.port: 8088 spring.thymeleaf.cache=false paypal.mode=sandbox paypal.client.app=AeVqmY_pxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxKYniPwzfL1jGR paypal.client.secret=ELibZhExxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxUsWOA

• 测试 
  
  
  （1）启动项目 
  
  

（2）在浏览器输入localhost:8088 

 

（3）点击paypal后，会跳到paypal的登陆界面，登陆测试帐号（PRESONAL）后点击继续便可扣费，扣500$(具体数额可在controller中自定义) 

Payment payment = paypalService.createPayment( 500.00, "USD", PaypalPaymentMethod.paypal, PaypalPaymentIntent.sale, "payment description", cancelUrl, successUrl);

（4）到https://www.sandbox.paypal.com 登陆测试帐号看看余额有没有变化

 

http://blog.csdn.net/change_on/article/details/73881791