├── .gitignore
├── pom.xml
└── src
    └── main
        └── java
            └── pac
                ├── Application.java
                ├── controllers
                    └── PayPalController.java
                └── paypal
                    └── PayPalClient.java


/.gitignore:
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1 | .idea/
2 | *.iml
3 | /target


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/pom.xml:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0"
 3 |          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 |          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 |     <modelVersion>4.0.0</modelVersion>
 6 | 
 7 |     <groupId>groupId</groupId>
 8 |     <artifactId>spring-boot-paypal</artifactId>
 9 |     <version>1.0-SNAPSHOT</version>
10 |     <parent>
11 |        <groupId>org.springframework.boot</groupId>
12 |        <artifactId>spring-boot-starter-parent</artifactId>
13 |        <version>1.5.8.RELEASE</version>
14 |     </parent>
15 |     <dependencies>
16 |         <dependency>
17 |             <groupId>org.springframework.boot</groupId>
18 |             <artifactId>spring-boot-starter-web</artifactId>
19 |         </dependency>
20 |         <dependency>
21 |             <groupId>com.paypal.sdk</groupId>
22 |             <artifactId>rest-api-sdk</artifactId>
23 |             <version>1.13.1</version>
24 |         </dependency>
25 |     </dependencies>
26 | </project>


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/src/main/java/pac/Application.java:
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 1 | package pac;
 2 | 
 3 | import org.springframework.boot.SpringApplication;
 4 | import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 | 
 6 | @SpringBootApplication
 7 | public class Application {
 8 |     public static void main(String[] args) {
 9 |         SpringApplication.run(Application.class, args);
10 |     }
11 | }
12 | 


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/src/main/java/pac/controllers/PayPalController.java:
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 1 | package pac.controllers;
 2 | import org.springframework.beans.factory.annotation.Autowired;
 3 | import org.springframework.web.bind.annotation.*;
 4 | import pac.paypal.PayPalClient;
 5 | 
 6 | import javax.servlet.http.HttpServletRequest;
 7 | import java.util.Map;
 8 | 
 9 | @RestController
10 | @RequestMapping(value = "/paypal")
11 | public class PayPalController {
12 | 
13 |     private final PayPalClient payPalClient;
14 |     @Autowired
15 |     PayPalController(PayPalClient payPalClient){
16 |         this.payPalClient = payPalClient;
17 |     }
18 | 
19 |     @CrossOrigin(origins = "http://localhost:4200")
20 |     @PostMapping(value = "/make/payment")
21 |     public Map<String, Object> makePayment(@RequestParam("sum") String sum){
22 |         return payPalClient.createPayment(sum);
23 |     }
24 | 
25 |     @CrossOrigin(origins = "http://localhost:4200")
26 |     @PostMapping(value = "/complete/payment")
27 |     public Map<String, Object> completePayment(HttpServletRequest request, @RequestParam("paymentId") String paymentId, @RequestParam("payerId") String payerId){
28 |         return payPalClient.completePayment(request);
29 |     }
30 | 
31 | 
32 | }
33 | 


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/src/main/java/pac/paypal/PayPalClient.java:
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 1 | package pac.paypal;
 2 | 
 3 | import com.paypal.api.payments.*;
 4 | import com.paypal.base.rest.APIContext;
 5 | import com.paypal.base.rest.PayPalRESTException;
 6 | import org.springframework.beans.factory.annotation.Autowired;
 7 | import org.springframework.stereotype.Component;
 8 | 
 9 | import javax.servlet.http.HttpServletRequest;
10 | import java.util.ArrayList;
11 | import java.util.HashMap;
12 | import java.util.List;
13 | import java.util.Map;
14 | 
15 | @Component
16 | public class PayPalClient {
17 | 
18 |     String clientId = "AYSq3RDGsmBLJE-otTkBtM-jBRd1TCQwFf9RGfwddNXWz0uFU9ztymylOhRS";
19 |     String clientSecret = "EGnHDxD_qRPdaLdZz8iCr8N7_MzF-YHPTkjs6NKYQvQSBngp4PTTVWkPZRbL";
20 | 
21 | //    @Autowired
22 | //    PayPalClient(){}
23 | 
24 |     public Map<String, Object> createPayment(String sum){
25 |         Map<String, Object> response = new HashMap<String, Object>();
26 |         Amount amount = new Amount();
27 |         amount.setCurrency("USD");
28 |         amount.setTotal(sum);
29 |         Transaction transaction = new Transaction();
30 |         transaction.setAmount(amount);
31 |         List<Transaction> transactions = new ArrayList<Transaction>();
32 |         transactions.add(transaction);
33 | 
34 |         Payer payer = new Payer();
35 |         payer.setPaymentMethod("paypal");
36 | 
37 |         Payment payment = new Payment();
38 |         payment.setIntent("sale");
39 |         payment.setPayer(payer);
40 |         payment.setTransactions(transactions);
41 | 
42 |         RedirectUrls redirectUrls = new RedirectUrls();
43 |         redirectUrls.setCancelUrl("http://localhost:4200/cancel");
44 |         redirectUrls.setReturnUrl("http://localhost:4200");
45 |         payment.setRedirectUrls(redirectUrls);
46 |         Payment createdPayment;
47 |         try {
48 |             String redirectUrl = "";
49 |             APIContext context = new APIContext(clientId, clientSecret, "sandbox");
50 |             createdPayment = payment.create(context);
51 |             if(createdPayment!=null){
52 |                 List<Links> links = createdPayment.getLinks();
53 |                 for (Links link:links) {
54 |                     if(link.getRel().equals("approval_url")){
55 |                         redirectUrl = link.getHref();
56 |                         break;
57 |                     }
58 |                 }
59 |                 response.put("status", "success");
60 |                 response.put("redirect_url", redirectUrl);
61 |             }
62 |         } catch (PayPalRESTException e) {
63 |             System.out.println("Error happened during payment creation!");
64 |         }
65 |         return response;
66 |     }
67 | 
68 | 
69 |     public Map<String, Object> completePayment(HttpServletRequest req){
70 |         Map<String, Object> response = new HashMap();
71 |         Payment payment = new Payment();
72 |         payment.setId(req.getParameter("paymentId"));
73 |         PaymentExecution paymentExecution = new PaymentExecution();
74 |         paymentExecution.setPayerId(req.getParameter("payerId"));
75 |         try {
76 |             APIContext context = new APIContext(clientId, clientSecret, "sandbox");
77 |             Payment createdPayment = payment.execute(context, paymentExecution);
78 |             if(createdPayment!=null){
79 |                 response.put("status", "success");
80 |                 response.put("payment", createdPayment);
81 |             }
82 |         } catch (PayPalRESTException e) {
83 |             System.err.println(e.getDetails());
84 |         }
85 |         return response;
86 |     }
87 | 
88 | 
89 | 
90 | }
91 | 


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