├── README.md
├── pom.xml
└── src
    ├── main
        ├── java
        │   └── com
        │   │   └── javatechie
        │   │       └── spring
        │   │           └── paypal
        │   │               └── api
        │   │                   ├── Order.java
        │   │                   ├── PaypalConfig.java
        │   │                   ├── PaypalController.java
        │   │                   ├── PaypalService.java
        │   │                   └── SpringPaypalExampleApplication.java
        └── resources
        │   ├── application.properties
        │   └── templates
        │       ├── cancel.html
        │       ├── home.html
        │       └── success.html
    └── test
        └── java
            └── com
                └── javatechie
                    └── spring
                        └── paypal
                            └── api
                                └── SpringPaypalExampleApplicationTests.java


/README.md:
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1 | # spring-boot-paypal-example
2 | How to perform payment integration using paypal
3 | 


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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 | 	<modelVersion>4.0.0</modelVersion>
 6 | 	<parent>
 7 | 		<groupId>org.springframework.boot</groupId>
 8 | 		<artifactId>spring-boot-starter-parent</artifactId>
 9 | 		<version>2.1.4.RELEASE</version>
10 | 		<relativePath /> <!-- lookup parent from repository -->
11 | 	</parent>
12 | 	<groupId>com.javatechie</groupId>
13 | 	<artifactId>spring-paypal-example</artifactId>
14 | 	<version>0.0.1-SNAPSHOT</version>
15 | 	<name>spring-paypal-example</name>
16 | 	<description>payment integration with paypal</description>
17 | 
18 | 	<properties>
19 | 		<java.version>1.8</java.version>
20 | 	</properties>
21 | <dependencies>
22 | 		<dependency>
23 | 			<groupId>org.springframework.boot</groupId>
24 | 			<artifactId>spring-boot-starter-thymeleaf</artifactId>
25 | 		</dependency>
26 | 		<dependency>
27 | 			<groupId>org.springframework.boot</groupId>
28 | 			<artifactId>spring-boot-starter-web</artifactId>
29 | 		</dependency>
30 | 		<dependency>
31 | 			<groupId>com.paypal.sdk</groupId>
32 | 			<artifactId>rest-api-sdk</artifactId>
33 | 			<version>1.4.2</version>
34 | 		</dependency>
35 | 		<dependency>
36 | 			<groupId>org.projectlombok</groupId>
37 | 			<artifactId>lombok</artifactId>
38 | 			<optional>true</optional>
39 | 		</dependency>
40 | 		<dependency>
41 | 			<groupId>org.springframework.boot</groupId>
42 | 			<artifactId>spring-boot-starter-test</artifactId>
43 | 			<scope>test</scope>
44 | 		</dependency>
45 | 	</dependencies>
46 | 
47 | 	<build>
48 | 		<plugins>
49 | 			<plugin>
50 | 				<groupId>org.springframework.boot</groupId>
51 | 				<artifactId>spring-boot-maven-plugin</artifactId>
52 | 			</plugin>
53 | 		</plugins>
54 | 	</build>
55 | 
56 | 
57 | </project>
58 | 


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/src/main/java/com/javatechie/spring/paypal/api/Order.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import lombok.AllArgsConstructor;
 4 | import lombok.Data;
 5 | import lombok.NoArgsConstructor;
 6 | import lombok.ToString;
 7 | 
 8 | @Data
 9 | @AllArgsConstructor
10 | @NoArgsConstructor
11 | @ToString
12 | public class Order {
13 | 
14 | 	private double price;
15 | 	private String currency;
16 | 	private String method;
17 | 	private String intent;
18 | 	private String description;
19 | 
20 | }
21 | 


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/src/main/java/com/javatechie/spring/paypal/api/PaypalConfig.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import java.util.HashMap;
 4 | import java.util.Map;
 5 | 
 6 | import org.springframework.beans.factory.annotation.Value;
 7 | import org.springframework.context.annotation.Bean;
 8 | import org.springframework.context.annotation.Configuration;
 9 | 
10 | import com.paypal.api.payments.PaymentHistory;
11 | import com.paypal.base.rest.APIContext;
12 | import com.paypal.base.rest.OAuthTokenCredential;
13 | import com.paypal.base.rest.PayPalRESTException;
14 | 
15 | @Configuration
16 | public class PaypalConfig {
17 | 
18 | 	@Value("${paypal.client.id}")
19 | 	private String clientId;
20 | 	@Value("${paypal.client.secret}")
21 | 	private String clientSecret;
22 | 	@Value("${paypal.mode}")
23 | 	private String mode;
24 | 
25 | 	@Bean
26 | 	public Map<String, String> paypalSdkConfig() {
27 | 		Map<String, String> configMap = new HashMap<>();
28 | 		configMap.put("mode", mode);
29 | 		return configMap;
30 | 	}
31 | 
32 | 	@Bean
33 | 	public OAuthTokenCredential oAuthTokenCredential() {
34 | 		return new OAuthTokenCredential(clientId, clientSecret, paypalSdkConfig());
35 | 	}
36 | 
37 | 	@Bean
38 | 	public APIContext apiContext() throws PayPalRESTException {
39 | 		APIContext context = new APIContext(oAuthTokenCredential().getAccessToken());
40 | 		context.setConfigurationMap(paypalSdkConfig());
41 | 		return context;
42 | 	}
43 | 
44 | }
45 | 


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/src/main/java/com/javatechie/spring/paypal/api/PaypalController.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import org.springframework.beans.factory.annotation.Autowired;
 4 | import org.springframework.stereotype.Controller;
 5 | import org.springframework.web.bind.annotation.GetMapping;
 6 | import org.springframework.web.bind.annotation.ModelAttribute;
 7 | import org.springframework.web.bind.annotation.PostMapping;
 8 | import org.springframework.web.bind.annotation.RequestParam;
 9 | 
10 | import com.paypal.api.payments.Links;
11 | import com.paypal.api.payments.Payment;
12 | import com.paypal.base.rest.PayPalRESTException;
13 | 
14 | @Controller
15 | public class PaypalController {
16 | 
17 | 	@Autowired
18 | 	PaypalService service;
19 | 
20 | 	public static final String SUCCESS_URL = "pay/success";
21 | 	public static final String CANCEL_URL = "pay/cancel";
22 | 
23 | 	@GetMapping("/")
24 | 	public String home() {
25 | 		return "home";
26 | 	}
27 | 
28 | 	@PostMapping("/pay")
29 | 	public String payment(@ModelAttribute("order") Order order) {
30 | 		try {
31 | 			Payment payment = service.createPayment(order.getPrice(), order.getCurrency(), order.getMethod(),
32 | 					order.getIntent(), order.getDescription(), "http://localhost:9090/" + CANCEL_URL,
33 | 					"http://localhost:9090/" + SUCCESS_URL);
34 | 			for(Links link:payment.getLinks()) {
35 | 				if(link.getRel().equals("approval_url")) {
36 | 					return "redirect:"+link.getHref();
37 | 				}
38 | 			}
39 | 			
40 | 		} catch (PayPalRESTException e) {
41 | 		
42 | 			e.printStackTrace();
43 | 		}
44 | 		return "redirect:/";
45 | 	}
46 | 	
47 | 	 @GetMapping(value = CANCEL_URL)
48 | 	    public String cancelPay() {
49 | 	        return "cancel";
50 | 	    }
51 | 
52 | 	    @GetMapping(value = SUCCESS_URL)
53 | 	    public String successPay(@RequestParam("paymentId") String paymentId, @RequestParam("PayerID") String payerId) {
54 | 	        try {
55 | 	            Payment payment = service.executePayment(paymentId, payerId);
56 | 	            System.out.println(payment.toJSON());
57 | 	            if (payment.getState().equals("approved")) {
58 | 	                return "success";
59 | 	            }
60 | 	        } catch (PayPalRESTException e) {
61 | 	         System.out.println(e.getMessage());
62 | 	        }
63 | 	        return "redirect:/";
64 | 	    }
65 | 
66 | }
67 | 


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/src/main/java/com/javatechie/spring/paypal/api/PaypalService.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import java.math.BigDecimal;
 4 | import java.math.RoundingMode;
 5 | import java.util.ArrayList;
 6 | import java.util.List;
 7 | 
 8 | import org.springframework.beans.factory.annotation.Autowired;
 9 | import org.springframework.stereotype.Service;
10 | 
11 | import com.paypal.api.payments.Amount;
12 | import com.paypal.api.payments.Payer;
13 | import com.paypal.api.payments.Payment;
14 | import com.paypal.api.payments.PaymentExecution;
15 | import com.paypal.api.payments.RedirectUrls;
16 | import com.paypal.api.payments.Transaction;
17 | import com.paypal.base.rest.APIContext;
18 | import com.paypal.base.rest.PayPalRESTException;
19 | 
20 | @Service
21 | public class PaypalService {
22 | 	
23 | 	@Autowired
24 | 	private APIContext apiContext;
25 | 	
26 | 	
27 | 	public Payment createPayment(
28 | 			Double total, 
29 | 			String currency, 
30 | 			String method,
31 | 			String intent,
32 | 			String description, 
33 | 			String cancelUrl, 
34 | 			String successUrl) throws PayPalRESTException{
35 | 		Amount amount = new Amount();
36 | 		amount.setCurrency(currency);
37 | 		total = new BigDecimal(total).setScale(2, RoundingMode.HALF_UP).doubleValue();
38 | 		amount.setTotal(String.format("%.2f", total));
39 | 
40 | 		Transaction transaction = new Transaction();
41 | 		transaction.setDescription(description);
42 | 		transaction.setAmount(amount);
43 | 
44 | 		List<Transaction> transactions = new ArrayList<>();
45 | 		transactions.add(transaction);
46 | 
47 | 		Payer payer = new Payer();
48 | 		payer.setPaymentMethod(method.toString());
49 | 
50 | 		Payment payment = new Payment();
51 | 		payment.setIntent(intent.toString());
52 | 		payment.setPayer(payer);  
53 | 		payment.setTransactions(transactions);
54 | 		RedirectUrls redirectUrls = new RedirectUrls();
55 | 		redirectUrls.setCancelUrl(cancelUrl);
56 | 		redirectUrls.setReturnUrl(successUrl);
57 | 		payment.setRedirectUrls(redirectUrls);
58 | 
59 | 		return payment.create(apiContext);
60 | 	}
61 | 	
62 | 	public Payment executePayment(String paymentId, String payerId) throws PayPalRESTException{
63 | 		Payment payment = new Payment();
64 | 		payment.setId(paymentId);
65 | 		PaymentExecution paymentExecute = new PaymentExecution();
66 | 		paymentExecute.setPayerId(payerId);
67 | 		return payment.execute(apiContext, paymentExecute);
68 | 	}
69 | 
70 | }
71 | 


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/src/main/java/com/javatechie/spring/paypal/api/SpringPaypalExampleApplication.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import org.springframework.boot.SpringApplication;
 4 | import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 | 
 6 | @SpringBootApplication
 7 | public class SpringPaypalExampleApplication {
 8 | 
 9 | 	public static void main(String[] args) {
10 | 		SpringApplication.run(SpringPaypalExampleApplication.class, args);
11 | 	}
12 | 
13 | }
14 | 


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/src/main/resources/application.properties:
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1 | server.port: 9090
2 | 
3 | paypal.mode=sandbox
4 | paypal.client.id=AYSq3RDGsmBLJE-otTkBtM-jBRd1TCQwFf9RGfwddNXWz0uFU9ztymylOhRS
5 | paypal.client.secret=EGnHDxD_qRPdaLdZz8iCr8N7_MzF-YHPTkjs6NKYQvQSBngp4PTTVWkPZRbL


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/src/main/resources/templates/cancel.html:
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 1 | <!DOCTYPE html>
 2 | <html>
 3 | <head>
 4 | <meta charset="UTF-8" />
 5 | <title>Insert title here</title>
 6 | </head>
 7 | <body>
 8 | 	<h1>Payment Failure</h1>
 9 | </body>
10 | </html>


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/src/main/resources/templates/home.html:
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  1 | <!DOCTYPE html>
  2 | <html lang="en" xmlns:th="http://www.thymeleaf.org">
  3 | <head>
  4 |     <meta name="viewport" content="width=device-width, initial-scale=1">
  5 |     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
  6 |     <style>
  7 | body {
  8 |   font-family: Arial;
  9 |   font-size: 17px;
 10 |   padding: 8px;
 11 | }
 12 | 
 13 | * {
 14 |   box-sizing: border-box;
 15 | }
 16 | 
 17 | .row {
 18 |   display: -ms-flexbox; /* IE10 */
 19 |   display: flex;
 20 |   -ms-flex-wrap: wrap; /* IE10 */
 21 |   flex-wrap: wrap;
 22 |   margin: 0 -16px;
 23 | }
 24 | 
 25 | .col-25 {
 26 |   -ms-flex: 25%; /* IE10 */
 27 |   flex: 25%;
 28 | }
 29 | 
 30 | .col-50 {
 31 |   -ms-flex: 50%; /* IE10 */
 32 |   flex: 50%;
 33 | }
 34 | 
 35 | .col-75 {
 36 |   -ms-flex: 75%; /* IE10 */
 37 |   flex: 75%;
 38 | }
 39 | 
 40 | .col-25,
 41 | .col-50,
 42 | .col-75 {
 43 |   padding: 0 16px;
 44 | }
 45 | 
 46 | .container {
 47 |   background-color: #f2f2f2;
 48 |   padding: 5px 20px 15px 20px;
 49 |   border: 1px solid lightgrey;
 50 |   border-radius: 3px;
 51 | }
 52 | 
 53 | input[type=text] {
 54 |   width: 100%;
 55 |   margin-bottom: 20px;
 56 |   padding: 12px;
 57 |   border: 1px solid #ccc;
 58 |   border-radius: 3px;
 59 | }
 60 | 
 61 | label {
 62 |   margin-bottom: 10px;
 63 |   display: block;
 64 | }
 65 | 
 66 | .icon-container {
 67 |   margin-bottom: 20px;
 68 |   padding: 7px 0;
 69 |   font-size: 24px;
 70 | }
 71 | 
 72 | .btn {
 73 |   background-color: #4CAF50;
 74 |   color: white;
 75 |   padding: 12px;
 76 |   margin: 10px 0;
 77 |   border: none;
 78 |   width: 100%;
 79 |   border-radius: 3px;
 80 |   cursor: pointer;
 81 |   font-size: 17px;
 82 | }
 83 | 
 84 | .btn:hover {
 85 |   background-color: #45a049;
 86 | }
 87 | 
 88 | a {
 89 |   color: #2196F3;
 90 | }
 91 | 
 92 | hr {
 93 |   border: 1px solid lightgrey;
 94 | }
 95 | 
 96 | span.price {
 97 |   float: right;
 98 |   color: grey;
 99 | }
100 | 
101 | /* Responsive layout - when the screen is less than 800px wide, make the two columns stack on top of each other instead of next to each other (also change the direction - make the "cart" column go on top) */
102 | @media (max-width: 800px) {
103 |   .row {
104 |     flex-direction: column-reverse;
105 |   }
106 |   .col-25 {
107 |     margin-bottom: 20px;
108 |   }
109 | }
110 | 
111 |     </style>
112 | </head>
113 | <body>
114 | <div class="row">
115 |     <div class="col-75">
116 |         <div class="container">
117 |             <form method="post"  action="/pay">
118 |                 <div class="col-50">
119 |                     <h3>Payment</h3>
120 |                     <label>Accepted Cards</label>
121 |                     <div class="icon-container">
122 |                         <i class="fa fa-cc-visa" style="color:navy;"></i>
123 |                         <i class="fa fa-cc-amex" style="color:blue;"></i>
124 |                         <i class="fa fa-cc-mastercard" style="color:red;"></i>
125 |                         <i class="fa fa-cc-discover" style="color:orange;"></i>
126 |                     </div>
127 |                     <label for="price">Total</label>
128 |                     <input type="text" id="price" name="price" value="10">
129 |                     <label for="currency">Currency</label>
130 |                     <input type="text" id="currency" name="currency" placeholder="Enter Currency">
131 |                     <label for="method">Payment Method</label>
132 |                     <input type="text" id="method" name="method" placeholder="Payment Method">
133 |                     <label for="intent">Intent</label>
134 |                     <input type="text" id="intent" name="intent" value="sale">
135 |                     <label for="description">Payment Description</label>
136 |                     <input type="text" id="description" name="description" placeholder="Payment Description">
137 | 
138 |                 </div>
139 | 
140 |                 <input type="submit" value="Continue to checkout" class="btn">
141 |             </form>
142 |         </div>
143 |     </div>
144 |     <div class="col-25">
145 |         <div class="container">
146 |             <h4>Cart <span class="price" style="color:black"><i class="fa fa-shopping-cart"></i> <b>4</b></span></h4>
147 |             <p><a href="#">Product 1</a> <span class="price">$1</span></p>
148 |             <p><a href="#">Product 2</a> <span class="price">$4</span></p>
149 |             <p><a href="#">Product 3</a> <span class="price">$3</span></p>
150 |             <p><a href="#">Product 4</a> <span class="price">$2</span></p>
151 |             <hr>
152 |             <p>Total <span class="price" style="color:black"><b>$10</b></span></p>
153 |         </div>
154 |     </div>
155 | </div>
156 | 
157 | </body>
158 | </html>
159 | 


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/src/main/resources/templates/success.html:
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 1 | <!DOCTYPE html>
 2 | <html>
 3 | <head>
 4 | <meta charset="UTF-8" />
 5 | <title>Insert title here</title>
 6 | </head>
 7 | <body>
 8 | 	<h1>Payment Success</h1>
 9 | </body>
10 | </html>


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/src/test/java/com/javatechie/spring/paypal/api/SpringPaypalExampleApplicationTests.java:
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 1 | package com.javatechie.spring.paypal.api;
 2 | 
 3 | import org.junit.Test;
 4 | import org.junit.runner.RunWith;
 5 | import org.springframework.boot.test.context.SpringBootTest;
 6 | import org.springframework.test.context.junit4.SpringRunner;
 7 | 
 8 | @RunWith(SpringRunner.class)
 9 | @SpringBootTest
10 | public class SpringPaypalExampleApplicationTests {
11 | 
12 | 	@Test
13 | 	public void contextLoads() {
14 | 	}
15 | 
16 | }
17 | 


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