Building a RESTful Web Service - Spring Boot

Hello everyone, Today we will learn how to develop Restful service using Spring Boot

Following technologies stack being used:

  • Spring Boot 2.1.1.RELEASE
  • Spring 5.1.3.RELEASE 
  • Maven 3
  • JDK 1.8
  • Eclipse Oxygen

 

1. Project Structure             

 

2. Maven/Dependency Management [pom.xml]:

<?xml version="1.0" encoding="UTF-8"?>
<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
https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.1.RELEASE</version>
<!-- lookup parent from repository -->
</parent>
<groupId>com.knowledgefactory</groupId>
<artifactId>springboot-rest</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-rest</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- spring mvc, rest -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project> 
 

3. Rest Controller: 

package com.knowledgefactory.knowledgefactorydemo;

import java.util.ArrayList;
import java.util.List;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HomeController {
@RequestMapping(value = "/hello", method = RequestMethod.GET)
public ResponseEntity<List<UserVo>> listAllUsers() {
List<UserVo> list = new ArrayList<>();
UserVo obj = new UserVo();
obj.setName("knowledgefactory");
obj.setEmail("knowledgefactory4upeoples@gmail.com");
list.add(obj);
return new ResponseEntity<List<UserVo>>(list, HttpStatus.OK);
}
} 

4. UserVO:

package com.knowledgefactory.knowledgefactorydemo;

public class UserVo {
private String name;
private String email;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}
}

5. Spring Boot:

package com.knowledgefactory.knowledgefactorydemo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class KnowledgefactorydemoApplication {
public static void main(String[] args) {
SpringApplication.run(KnowledgefactorydemoApplication.class, args);
}
}  

6. Run:

$ mvn spring-boot:run
 

7. Test:

Open POSTMAN tool, select request type, specify the URI 


Popular posts from this blog

Learn Java 8 streams with an example - print odd/even numbers from Array and List

Java Stream API - How to convert List of objects to another List of objects using Java streams?

Registration and Login with Spring Boot + Spring Security + Thymeleaf

Java, Spring Boot Mini Project - Library Management System - Download

ReactJS, Spring Boot JWT Authentication Example

Top 5 Java ORM tools - 2024

Java - Blowfish Encryption and decryption Example

Spring boot video streaming example-HTML5

Google Cloud Storage + Spring Boot - File Upload, Download, and Delete