How to call third-party API in Spring Boot
This Spring Boot tutorial demonstrates how to consume a third-party API and display the results in a Thymeleaf view. Let's refine the text and code for clarity and accuracy.
Revised Text:
Overview
This tutorial guides you through integrating a third-party API into a Spring Boot application. We'll make a GET request to https://api.sampleapis.com/coffee/hot, then elegantly present the response data within a Thymeleaf template displayed in your browser.
Prerequisites
Basic familiarity with the following is assumed:
- Java
- Spring Boot
- Thymeleaf
- Maven (or Gradle) for dependency management
Development Process
1. Project Setup
Use Spring Initializr (https://www.php.cn/link/bafd1b75c5f0ceb81050a853c9faa911) to create a new Spring Boot project. Include the following dependencies:
Extract the downloaded archive and import the project into your IDE (e.g., IntelliJ IDEA).
2. Create the Coffee Model
Create a POJO (Plain Old Java Object) to represent the coffee data received from the API. This simplifies data handling.
package com.myproject.apidemo;
public class Coffee {
public String title;
public String description;
// Constructors, getters, and setters (omitted for brevity)
@Override
public String toString() {
return "Coffee{" +
"title='" + title + '\'' +
", description='" + description + '\'' +
'}';
}
}3. Create the CoffeeController
This controller handles the API call and data processing.
package com.myproject.apidemo;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.core.ParameterizedTypeReference;
import java.util.List;
@Controller
public class CoffeeController {
@GetMapping("/coffee")
public String getCoffee(Model model) {
String url = "https://api.sampleapis.com/coffee/hot";
WebClient webClient = WebClient.create();
List<Coffee> coffeeList = webClient.get()
.uri(url)
.retrieve()
.bodyToMono(new ParameterizedTypeReference<List<Coffee>>() {})
.block();
model.addAttribute("coffeeList", coffeeList);
return "coffee";
}
}Note: Error handling (e.g., using onErrorResume with WebClient) should be added for production-ready code. The block() method is used here for simplicity but should be replaced with reactive programming techniques for better performance in a real-world application.
4. Create the Thymeleaf View (coffee.html)
Create a Thymeleaf template to display the coffee data. Place this file in src/main/resources/templates/coffee.html.
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Coffee List</title>
</head>
<body>
<h3>Coffee List</h3>
<table>
<thead>
<tr>
<th>Title</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr th:each="coffee : ${coffeeList}">
<td th:text="${coffee.title}"></td>
<td th:text="${coffee.description}"></td>
</tr>
</tbody>
</table>
</body>
</html>5. Run the Application
Start your Spring Boot application. You should now be able to access the coffee list at http://localhost:8080/coffee (or your application's base URL).
This revised version provides a more complete and accurate representation of the process, including crucial details like the Coffee model class and improved code formatting. Remember to handle potential errors in a production environment.
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