How to use Webman framework to implement online booking and payment functions?

How to use Webman framework to implement online booking and payment functions?

Introduction:
Webman is a rapid development framework based on Java. It provides a set of development tools and convenient APIs to make building Web applications easier and more efficient. This article will take the online reservation and payment functions as an example to introduce how to use the Webman framework to build a simple reservation system and implement the payment function.

1. Preparation
   First, we need to ensure that Java JDK and Maven have been installed. Then, add Webman's dependency in Maven's pom.xml file:

<dependency>
  <groupId>org.webmanframework</groupId>
  <artifactId>webman-core</artifactId>
  <version>0.1.0</version>
</dependency>

2. Create project structure
   In the command line or IDE, create a Maven project and follow the following Structure organization code:

src
└─main
    ├─java
    │  └─com
    │      └─example
    │          └─booking
    │              ├─controller
    │              │  └─BookingController.java
    │              ├─model
    │              │  └─Booking.java
    │              └─service
    │                  └─BookingService.java
    └─resources
        └─application.properties

3. Writing code
   First, we need to define a booking data model and create the Booking.java file:

package com.example.booking.model;

public class Booking {
  private String id;
  private String name;
  private String date;
  private double amount;
  
  // getter and setter methods
}

Then, we create a booking service class to handle the business logic of booking, create the BookingService.java file:

package com.example.booking.service;

import com.example.booking.model.Booking;

public class BookingService {
  public void createBooking(Booking booking) {
    // 处理预订逻辑
  }
  
  public Booking getBookingById(String id) {
    // 根据ID获取预订信息
    return null;
  }
  
  // 其他业务方法
}

Next, we create a booking controller class , used to process requests and responses from Web pages, create the BookingController.java file:

package com.example.booking.controller;

import com.example.booking.model.Booking;
import com.example.booking.service.BookingService;

import org.webmanframework.annotation.Controller;
import org.webmanframework.annotation.Post;
import org.webmanframework.annotation.RequestBody;
import org.webmanframework.annotation.RequestMapping;
import org.webmanframework.annotation.RequestParam;
import org.webmanframework.http.HttpResponse;

@Controller
public class BookingController {
  private BookingService bookingService; // 预订服务类的实例
  
  @RequestMapping("/booking/create")
  @Post
  public HttpResponse createBooking(@RequestBody Booking booking) {
    bookingService.createBooking(booking); // 调用预订服务类的创建方法
    return HttpResponse.ok();
  }
  
  @RequestMapping("/booking/get")
  public HttpResponse getBookingById(@RequestParam("id") String id) {
    Booking booking = bookingService.getBookingById(id); // 调用预订服务类的查询方法
    return HttpResponse.ok(booking);
  }
  
  // 其他处理方法
}

Finally, configure the basic properties of Webman in the application.properties file :

webman.server.port=8080
webman.controller.scanPackage=com.example.booking.controller

4. Run the application
   In the command line, switch to the project root directory and execute the following command to start the Webman server:

mvn clean package
java -jar target/booking-1.0.0.jar

Now, you You can access http://localhost:8080/booking/get?id=1 in the browser to obtain the booking information with ID 1.

5. Implementing the payment function
   In order to implement the payment function, we can choose the appropriate payment interface and related libraries according to actual needs. Here, we give an example of how to use Alipay SDK to implement payment functions.

First, we need to add the dependency of Alipay SDK in the pom.xml file:

<dependency>
  <groupId>com.alipay.sdk</groupId>
  <artifactId>alipay-sdk-java</artifactId>
  <version>3.4.49.ALL</version>
</dependency>

Then, in BookingController.java Add the payment processing method to the file:

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.alipay.api.response.AlipayTradePagePayResponse;

@Controller
public class BookingController {
  // ...

  @RequestMapping("/booking/pay")
  public HttpResponse pay(@RequestParam("orderId") String orderId, 
                          @RequestParam("totalAmount") String totalAmount) {
    String alipayAppId = "YOUR_APP_ID";
    String alipayPrivateKey = "YOUR_PRIVATE_KEY";
    String alipayPublicKey = "YOUR_PUBLIC_KEY";
    String alipayGateway = "https://openapi.alipay.com/gateway.do";
    String returnUrl = "http://localhost:8080/booking/pay/callback";
    
    AlipayClient alipayClient = new DefaultAlipayClient(alipayGateway, alipayAppId, alipayPrivateKey, "json", "UTF-8", alipayPublicKey, "RSA2");
    AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
    alipayRequest.setReturnUrl(returnUrl);
    alipayRequest.setNotifyUrl(returnUrl);
    alipayRequest.setBizContent("{"out_trade_no":"" + orderId + "","total_amount":"" + totalAmount + "","subject":"" + orderId + "","body":"" + orderId + "","timeout_express":"5m","product_code":"FAST_INSTANT_TRADE_PAY"}");
    
    try {
      AlipayTradePagePayResponse alipayResponse = alipayClient.pageExecute(alipayRequest);
      // 下单成功，返回支付URL
      return HttpResponse.ok(alipayResponse.getBody());
    } catch (AlipayApiException e) {
      e.printStackTrace();
      // 下单失败，返回错误信息
      return HttpResponse.error(500, "支付失败");
    }
  }
  
  @RequestMapping("/booking/pay/callback")
  public HttpResponse payCallback(@RequestParam("") String param) {
    // 处理支付回调逻辑
    return HttpResponse.ok();
  }
}

In the above code, you first need to set the payment-related configuration, including Alipay's App ID, private key, public key and other information. Then, create an AlipayClient instance, construct a payment request object, and set the parameters and callback address. Finally, use the AlipayClient object to execute the payment request, obtain the return result and process it.

So far, we have completed the development of online booking and payment functions using the Webman framework.

Conclusion:
The Webman framework provides a set of simple and easy-to-use APIs and tools, making developing Web applications more efficient. Through the introduction of this article, we learned how to use the Webman framework to build a reservation system and implement the payment function.

Reference materials:

• Webman official documentation: https://webman.io/
• Alipay SDK official documentation: https://github.com/alipay /alipay-sdk-java

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