Prática

Arquitetura Spring Boot

Construção do Projeto

1. Instalar o Java (JDK)

2. Instalar o Eclipse

3. Instalar o MongoDB Server & Compass

4. Gerar o projeto (Spring Initializr)

Instalar o Java (JDK)

https://www.oracle.com/br/java/technologies/downloads/

Instalar o Eclipse

https://www.eclipse.org/downloads/packages/

Instalar o MongoDB Server & Compass

Criar o banco de dados test e a coleção funcionarios

Importar dados:

[
  {
    "name": "Alice Santos",
    "age": 28,
    "position": "Marketing Analyst",
    "department": "Marketing",
    "city": "Rio de Janeiro",
    "state": "RJ",
    "workFormat": "On-site",
    "salary": 4500
  },
  {
    "name": "Bruno Oliveira",
    "age": 32,
    "position": "Backend Developer",
    "department": "Technology",
    "city": "São Paulo",
    "state": "SP",
    "workFormat": "Hybrid",
    "salary": 7200
  },
  {
    "name": "Carla Mendes",
    "age": 41,
    "position": "Project Manager",
    "department": "Operations",
    "city": "Curitiba",
    "state": "PR",
    "workFormat": "Remote",
    "salary": 9800
  },
  {
    "name": "Diego Ferreira",
    "age": 25,
    "position": "Support Intern",
    "department": "IT",
    "city": "Belo Horizonte",
    "state": "MG",
    "workFormat": "On-site",
    "salary": 1800
  },
  {
    "name": "Fernanda Costa",
    "age": 29,
    "position": "Financial Analyst",
    "department": "Finance",
    "city": "Porto Alegre",
    "state": "RS",
    "workFormat": "Hybrid",
    "salary": 5200
  },
  {
    "name": "Gustavo Lima",
    "age": 37,
    "position": "HR Coordinator",
    "department": "Human Resources",
    "city": "Salvador",
    "state": "BA",
    "workFormat": "On-site",
    "salary": 6500
  },
  {
    "name": "Juliana Rocha",
    "age": 30,
    "position": "Product Owner",
    "department": "Products",
    "city": "Recife",
    "state": "PE",
    "workFormat": "Remote",
    "salary": 8700
  },
  {
    "name": "Lucas Martins",
    "age": 26,
    "position": "UX/UI Designer",
    "department": "Design",
    "city": "Florianópolis",
    "state": "SC",
    "workFormat": "Hybrid",
    "salary": 4800
  },
  {
    "name": "Mariana Alves",
    "age": 34,
    "position": "Data Scientist",
    "department": "Technology",
    "city": "São Paulo",
    "state": "SP",
    "workFormat": "Remote",
    "salary": 11500
  },
  {
    "name": "Rodrigo Pires",
    "age": 45,
    "position": "Operations Director",
    "department": "Executive Board",
    "city": "Brasília",
    "state": "DF",
    "workFormat": "On-site",
    "salary": 18000
  }
]

Gerar o projeto (Spring Initializr)

Gerar:

Importar no Eclipse:

Executar a aplicação:

netstat -ano | findstr :8080
  TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING       22204
  TCP    [::]:8080              [::]:0                 LISTENING       22204

taskkill /PID 22204 /F

Criar as funcionalidades

newfeatures
src/main/java
    com.barbieri.newfeatures
        NewFeaturesApplication.java
    com.barbieri.newfeatures.controller
        EmployeeControle.java
    com.barbieri.newfeatures.entity
        Employee.java
    com.barbieri.newfeatures.repository
        EmployeeRepository.java
    com.barbieri.newfeatures.service
        EmployeeService.java
        EmployeeServiceImpl.java

Entity

Criar novo pacote com.barbieri.newfeatures.entity:

Criar a classe Employee.java:

Campos com a notação @Document e a coleção criada no MongoDB:

package com.barbieri.newfeatures.entity;

import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection="employee")
public class Employee {
	
    private String name;
    private int age;
    private String position;
    private String department;
    private String city;
    private String state;
    private String workFormat;
    private double salary;
}

Gerar o construtor utilizando os campos:

Gerar Getters and Setters:

Gerar toString:

Gerar hashCode() and equals()

Employee.java:

package com.barbieri.newfeatures.entity;

import java.util.Objects;

public class Employee {
	
    private String name;
    private int age;
    private String position;
    private String department;
    private String city;
    private String state;
    private String workFormat;
    private double salary; 
    
	public Employee(String name, int age, String position, String department, String city, String state,
			String workFormat, double salary) {
		super();
		this.name = name;
		this.age = age;
		this.position = position;
		this.department = department;
		this.city = city;
		this.state = state;
		this.workFormat = workFormat;
		this.salary = salary;
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getPosition() {
		return position;
	}
	public void setPosition(String position) {
		this.position = position;
	}
	public String getDepartment() {
		return department;
	}
	public void setDepartment(String department) {
		this.department = department;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getState() {
		return state;
	}
	public void setState(String state) {
		this.state = state;
	}
	public String getWorkFormat() {
		return workFormat;
	}
	public void setWorkFormat(String workFormat) {
		this.workFormat = workFormat;
	}
	public double getSalary() {
		return salary;
	}
	public void setSalary(double salary) {
		this.salary = salary;
	}
	
	@Override
	public String toString() {
		return "Employee [name=" + name + ", age=" + age + ", position=" + position + ", department=" + department
				+ ", city=" + city + ", state=" + state + ", workFormat=" + workFormat + ", salary=" + salary
				+ ", getName()=" + getName() + ", getAge()=" + getAge() + ", getPosition()=" + getPosition()
				+ ", getDepartment()=" + getDepartment() + ", getCity()=" + getCity() + ", getState()=" + getState()
				+ ", getWorkFormat()=" + getWorkFormat() + ", getSalary()=" + getSalary() + ", getClass()=" + getClass()
				+ ", hashCode()=" + hashCode() + ", toString()=" + super.toString() + "]";
	}
	
	@Override
	public int hashCode() {
		return Objects.hash(age, city, department, name, position, salary, state, workFormat);
	}
	
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Employee other = (Employee) obj;
		return age == other.age && Objects.equals(city, other.city) && Objects.equals(department, other.department)
				&& Objects.equals(name, other.name) && Objects.equals(position, other.position)
				&& Double.doubleToLongBits(salary) == Double.doubleToLongBits(other.salary)
				&& Objects.equals(state, other.state) && Objects.equals(workFormat, other.workFormat);
	}	
}

Repository

Criar novo pacote com.barbieri.newfeatures.repository

Criar a interface EmployeeRepository.java

A interface deve utilizar a notação @Repository e importar a referência para dizer que é um repositório do SpringBoot, além de extender de MongoRepository

Service

Criar novo pacote com.barbieri.newfeatures.service:

Criar interface EmployeeService.java:

package com.barbieri.newfeatures.service;

import java.util.List;

import com.barbieri.newfeatures.entity.Employee;

public interface EmployeeService {

	List<Employee> listAll();
	
}

Criar uma classe para EmployeeServiceImpl.java implementar a interface:

Inserir a notação @Service e fazer a injeção de dependência do repositório com a notação @Autowired e implementar seus métodos:

package com.barbieri.newfeatures.service;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.barbieri.newfeatures.entity.Employee;
import com.barbieri.newfeatures.repository.EmployeeRepository;

@Service
public class EmployeeServiceImpl implements EmployeeService {

	@Autowired
	private EmployeeRepository employeeRepository;
	
	@Override
	public List<Employee> listAll() {
		
		List<Employee> employees = new ArrayList<>();
		employeeRepository.findAll().forEach(employees::add);
		
		return employees;
	}

}

Controller

Criar novo pacote com.barbieri.newfeatures.controller:

Criar classe EmployeeController para receber as requisições:

Utilizar a notação @RestController

package com.barbieri.newfeatures.controller;

import org.springframework.web.bind.annotation.RestController;

@RestController
public class EmployeeController {
	
}

Chamar a camada de serviço e fazer a injeção de dependência com a notação @Autowired

package com.barbieri.newfeatures.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RestController;

import com.barbieri.newfeatures.service.EmployeeService;

@RestController
public class EmployeeController {

	@Autowired
	private EmployeeService employeeService;
}

Mapear o caminho e implementar o método

package com.barbieri.newfeatures.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.barbieri.newfeatures.entity.Employee;
import com.barbieri.newfeatures.service.EmployeeService;

@RestController
public class EmployeeController {

	@Autowired
	private EmployeeService employeeService;
	
	@GetMapping("/listEmployees")
	public ResponseEntity<List<Employee>> listEmployees()
	{
		List<Employee> employees = employeeService.listAll();
		return new ResponseEntity<List<Employee>>(employees,HttpStatus.OK);
	}
}

Execução

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::                (v3.5.5)

2025-09-01T18:00:18.412-03:00  INFO 29552 --- [newfeatures] [           main] c.b.newfeatures.NewfeaturesApplication   : Starting NewfeaturesApplication using Java 21.0.8 with PID 29552 (C:\Users\mpbarbieri.TOPAZ.000\Downloads\newfeatures\target\classes started by mpbarbieri in C:\Users\mpbarbieri.TOPAZ.000\Downloads\newfeatures)
2025-09-01T18:00:18.414-03:00  INFO 29552 --- [newfeatures] [           main] c.b.newfeatures.NewfeaturesApplication   : No active profile set, falling back to 1 default profile: "default"
2025-09-01T18:00:18.948-03:00  INFO 29552 --- [newfeatures] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2025-09-01T18:00:19.004-03:00  INFO 29552 --- [newfeatures] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 48 ms. Found 1 MongoDB repository interface.
2025-09-01T18:00:19.348-03:00  INFO 29552 --- [newfeatures] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2025-09-01T18:00:19.362-03:00  INFO 29552 --- [newfeatures] [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2025-09-01T18:00:19.363-03:00  INFO 29552 --- [newfeatures] [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.44]
2025-09-01T18:00:19.405-03:00  INFO 29552 --- [newfeatures] [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2025-09-01T18:00:19.406-03:00  INFO 29552 --- [newfeatures] [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 954 ms
2025-09-01T18:00:19.591-03:00  INFO 29552 --- [newfeatures] [           main] org.mongodb.driver.client                : MongoClient with metadata {"driver": {"name": "mongo-java-driver|sync|spring-boot", "version": "5.5.1"}, "os": {"type": "Windows", "name": "Windows 10", "architecture": "amd64", "version": "10.0"}, "platform": "Java/Eclipse Adoptium/21.0.8+9-LTS"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@5afbd567, com.mongodb.Jep395RecordCodecProvider@6993c8df, com.mongodb.KotlinCodecProvider@57545c3f]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=100, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=JAVA_LEGACY, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null}
2025-09-01T18:00:19.624-03:00  INFO 29552 --- [newfeatures] [localhost:27017] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, cryptd=false, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=25, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=18181500, minRoundTripTimeNanos=0}
2025-09-01T18:00:20.094-03:00  INFO 29552 --- [newfeatures] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port 8080 (http) with context path '/'
2025-09-01T18:00:20.102-03:00  INFO 29552 --- [newfeatures] [           main] c.b.newfeatures.NewfeaturesApplication   : Started NewfeaturesApplication in 2.051 seconds (process running for 2.311)

Ajustes no Controlador

Criação de uma raiz para navegar pelos índices

package com.barbieri.newfeatures.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.barbieri.newfeatures.entity.Employee;
import com.barbieri.newfeatures.service.EmployeeService;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

@RestController
public class EmployeeController {

	@Autowired
	private EmployeeService employeeService;
	
	@GetMapping("/")
	public ResponseEntity<String> start()
	{
		
		// region "response html"...
		String response = """
				
			<!doctype html>
			<html lang="pt-br" xmlns:th="http://www.thymeleaf.org">
			<head>
			  <meta charset="utf-8">
			  <title th:text="${appName} + ' | Início'">Início</title>
			  <meta name="viewport" content="width=device-width,initial-scale=1">
			  <style>
			    body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;padding:0;background:#f6f7f9;color:#222}
			    header{background:#0f172a;color:#fff;padding:16px 24px}
			    main{max-width:960px;margin:24px auto;padding:0 16px}
			    .card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:20px;box-shadow:0 1px 2px rgba(0,0,0,.05)}
			    .actions a, .actions button{display:inline-block;margin-right:8px;padding:10px 14px;border-radius:10px;border:1px solid #e5e7eb;background:#fff;cursor:pointer;text-decoration:none;color:#111}
			    .actions a:hover, .actions button:hover{background:#f1f5f9}
			    footer{text-align:center;color:#6b7280;margin:32px 0;font-size:14px}
			  </style>
			</head>
			<body>
			<header>
			  <h1 th:text="${appName}">NewFeatures</h1>
			</header>
			
			<main>
			  <section class="card">
			    <h2>Página Inicial</h2>
			    <p>Bem-vindo. Escolha uma ação.</p>
			
			    <div class="actions">
			      <a href="/listEmployees">Listar Funcionários</a>
			    </div>
			  </section>
			</main>
			
			<footer>
			  &copy; <span th:text="${#dates.year(#dates.createNow())}">2025</span> - NewFeatures
			</footer>
			</body>
			</html>			
				
				""";
		// endregion	
		
		return new ResponseEntity<String>(response,HttpStatus.OK);
	}
	
	@GetMapping("/listEmployees")
	public ResponseEntity<List<Employee>> listEmployees()
	{
		List<Employee> employees = employeeService.listAll();
		return new ResponseEntity<List<Employee>>(employees,HttpStatus.OK);		
	}
}

java_algoritmos_amazoncode/newfeatures at main · marcelobarbieri/java_algoritmos_amazoncodeGitHub

java_algoritmos_amazoncode/customer at main · marcelobarbieri/java_algoritmos_amazoncodeGitHub