做全球性的支付，选用paypal！为什么选择paypal？ 因为paypal是目前全球最大的在线支付工具，就像国内的支付宝一样，是一个基于买卖双方的第三方平台。买家只需知道你的paypal账号，即可在线直接把钱汇入你的账户，即时到账，简单方便快捷。
在集成paypal支付接口之前，首先要有一系列的准备，开发者账号啊、sdk、测试环境等等先要有，然后再码代码。集成的步骤如下：
一、环境准备
-
注册paypal账号
-
注册paypal开发者账号
-
创建两个测试用户
-
创建应用，生成用于测试的clientID 和 密钥
二、代码集成
-
springboot环境
-
pom引进paypal-sdk的jar包
-
码代码
-
测试
-
后言
现在开始
- 注册paypal账号
（1）在浏览器输入“https://www.paypal.com” 跳转到如下界面，点击右上角的注册
（2）选择，”创建商家用户”，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开发者账号
（1）在浏览器输入“https://developer.paypal.com”，点击右上角的“Log into Dashboard”，用上一步创建好的账号登录
- 创建两个测试用户
（1）登录成功后，在左边的导航栏中点击 Sandbox 下的 Accounts
（2）进入Acccouts界面后，可以看到系统有两个已经生成好的测试账号，但是我们不要用系统给的测试账号，很卡的，自己创建两个
（3）点击右上角的“Create Account”，创建测试用户
<1> 先创建一个“ PERSONAL”类型的用户，国家一定要选“China”，账户余额自己填写
<2> 接着创建一个“BUSINESS”类型的用户，国家一定要选“China”，账户余额自己填写
<3>创建好之后可以点击测试账号下的”Profile“，可以查看信息，如果没加载出来，刷新
<4>用测试账号登录测试网站查看，注意！这跟paypal官网不同！不是同一个地址，在浏览器输入：https://www.sandbox.paypal.com 在这里登陆测试账户
- 创建应用，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，创建一个Live账号，下图是我已经创建好的
（2）然后再到下边创建App
这是我创建好的“Test”App
（3）点击刚刚创建好的App“Test”，注意看到”ClientID“ 和”Secret“(Secret如果没显示，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，项目结构如下
- 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>4.0.0modelVersion> <groupId>com.masasdanigroupId> <artifactId>paypal-springbootartifactId> <version>0.0.1-SNAPSHOTversion> <name>paypal-springbootname> <repositories> <repository> <id>spring-milestonesid> <name>Spring Milestonesname> <url>http://repo.spring.io/libs-milestoneurl> repository> <repository> <id>jcenter-snapshotsid> <name>jcentername> <url>https://jcenter.bintray.com/url> repository> repositories> <pluginRepositories> <pluginRepository> <id>spring-milestonesid> <name>Spring Milestonesname> <url>http://repo.spring.io/libs-milestoneurl> pluginRepository> pluginRepositories> <parent> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-parentartifactId> <version>1.3.0.RELEASEversion> parent> <properties> <project.build.sourceEncoding>UTF-8project.build.sourceEncoding> <java.version>1.7java.version> properties> <dependencies> <dependency> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-webartifactId> dependency> <dependency> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-thymeleafartifactId> dependency> <dependency> <groupId>com.paypal.sdkgroupId> <artifactId>rest-api-sdkartifactId> <version>1.4.2version> dependency> dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.pluginsgroupId> <artifactId>maven-compiler-pluginartifactId> <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 paypalSdkConfig(){ Map 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 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
<html>
<head> <meta charset="UTF-8" /> <title>Insert title heretitle> head> <body> <h1>Canceled by userh1> body> html>（9）index.html
<html>
<head> <meta charset="UTF-8" /> <title>Insert title heretitle> 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
<html>
<head> <meta charset="UTF-8" /> <title>Insert title heretitle> head> <body> <h1>Payment Successh1> 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的登录界面，登录测试账号（PRESONAL）后点击继续即可扣费，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 登录测试账号看看余额有没有变化
http://blog.csdn.net/change_on/article/details/73881791