initial commit: set up Spring Boot REST API with user management features

Author: gabrielldn

pom.xml

@@ -0,0 +1,61 @@
+<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 
+         http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.example</groupId>
+    <artifactId>java-api</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>java-api-with-otlp-sdk</name>
+    <description>Exemplo de API REST em Java com Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.1.0</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+
+    <dependencies>
+        <!-- Spring Boot Starter Web para construir APIs REST -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- Spring Data JPA -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <!-- In-memory H2 Database -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <!-- Swagger UI com SpringDoc -->
+        <dependency>
+            <groupId>org.springdoc</groupId>
+            <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
+            <version>2.1.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <!-- Plugin do Spring Boot -->
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/com/example/RestApiApplication.java

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+package com.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class RestApiApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(RestApiApplication.class, args);
+    }
+}

src/main/java/com/example/controller/HelloController.java

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+package com.example.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+
+    @GetMapping("/hello")
+    public String hello() {
+        return "Hello, World!";
+    }
+}

src/main/java/com/example/controller/UserController.java

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+package com.example.controller;
+
+import com.example.model.User;
+import com.example.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/users")
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+    
+    @GetMapping
+    public List<User> getAllUsers() {
+        return userService.getAllUsers();
+    }
+    
+    @GetMapping("/{id}")
+    public User getUserById(@PathVariable Long id) {
+        return userService.getUserById(id);
+    }
+    
+    @PostMapping
+    public User createUser(@RequestBody User user) {
+        return userService.createUser(user);
+    }
+    
+    @PutMapping("/{id}")
+    public User updateUser(@PathVariable Long id, @RequestBody User user) {
+        return userService.updateUser(id, user);
+    }
+    
+    @DeleteMapping("/{id}")
+    public void deleteUser(@PathVariable Long id) {
+        userService.deleteUser(id);
+    }
+}

src/main/java/com/example/exception/UserNotFoundException.java

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+package com.example.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class UserNotFoundException extends RuntimeException {
+    public UserNotFoundException(String message) {
+        super(message);
+    }
+}

src/main/java/com/example/model/User.java

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+package com.example.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "users")
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    
+    private String name;
+    private String email;
+
+    // Getters e Setters
+    public Long getId() {
+        return id;
+    }
+    public void setId(Long id) {
+        this.id = id;
+    }
+    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;
+    }
+}

src/main/java/com/example/repository/UserRepository.java

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+package com.example.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import com.example.model.User;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+    // Adicione aqui os métodos customizados, se necessário.
+}

src/main/java/com/example/service/UserService.java

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+package com.example.service;
+
+import com.example.model.User;
+import com.example.repository.UserRepository;
+import com.example.exception.UserNotFoundException;
+import org.springframework.stereotype.Service;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.List;
+
+@Service
+public class UserService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    public List<User> getAllUsers() {
+        return userRepository.findAll();
+    }
+    
+    public User getUserById(Long id) {
+        return userRepository.findById(id)
+            .orElseThrow(() -> new UserNotFoundException("User not found with id " + id));
+    }
+    
+    public User createUser(User user) {
+        return userRepository.save(user);
+    }
+    
+    public User updateUser(Long id, User userDetails) {
+        User user = getUserById(id);
+        user.setName(userDetails.getName());
+        user.setEmail(userDetails.getEmail());
+        return userRepository.save(user);
+    }
+    
+    public void deleteUser(Long id) {
+        userRepository.deleteById(id);
+    }
+}

src/main/resources/application.properties

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+spring.h2.console.enabled=true
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=update

target/classes/application.properties

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+spring.h2.console.enabled=true
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=update