SpringBoot is a very popular Java framework that helps developers quickly build applications. In this article, I will recommend some excellent SpringBoot open source projects to you. The projects are humorous, and I’ll provide some concrete code examples as well. let’s start!
1. Spring Pet Clinic
Spring PetClinic is a very famous SpringBoot example project. It provides a complete pet clinic management system, including the management of customers, pets, doctors and clinics. The code of this project has been widely used and tested, and it is very suitable as an entry project for learning and practicing SpringBoot.
@RestController
public class PetController {
@Autowired
private PetRepository petRepository;
@RequestMapping("/pets")
public List<Pet> getAllPets() {
return petRepository. findAll();
}
}
2. Spring Boot Admin
Spring Boot Admin is a tool for managing and monitoring SpringBoot applications. It helps you monitor application health, performance, and logs. The UI interface of this project is very friendly and provides very detailed information, which is very useful for developers.
@SpringBootApplication
@EnableAdminServer
public class SpringBootAdminApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootAdminApplication.class, args);
}
}
3. Spring Session
Spring Session is a tool for managing web application sessions. It lets you use different session storage technologies like Redis, MongoDB, etc. This project is ideal for applications that need to manage a large number of sessions.
@Configuration
@EnableRedisHttpSession
public class HttpSessionConfig {
@Bean
public LettuceConnectionFactory connectionFactory() {
return new LettuceConnectionFactory();
}
}
4. Spring Security
Spring Security is a very popular security framework that helps you secure Spring applications. It provides many commonly used security functions, such as authentication, authorization, attack defense and so on. This project is ideal for those applications that need to keep data safe.
@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserDetailsService userDetailsService;
@Override
protected void configure(HttpSecurity http) throws Exception {
http. authorizeRequests()
.antMatchers("/admin/**").hasRole("ADMIN")
.antMatchers("/user/**").hasAnyRole("ADMIN", "USER")
.antMatchers("/**").permitAll()
.and().formLogin();
}
@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
auth. userDetailsService(userDetailsService);
}
}
5. Spring Data JPA
Spring Data JPA is a framework for managing data persistence layers. It allows you to use very little code to complete data access, and supports many kinds of databases, such as MySQL, PostgreSQL, Oracle, etc. This project is ideal for applications that need to manage large amounts of data.
@Repository
public interface UserRepository extends JpaRepository<User, Long> {
User findByUsername(String username);
}
6. Spring Cloud Netflix
Spring Cloud Netflix is a framework for building distributed systems. It provides many commonly used components, such as load balancing, service discovery, circuit breakers, and more. This project is very suitable for those applications that need to build distributed systems.
@SpringBootApplication
@EnableEurekaClient
public class UserServiceApplication {
public static void main(String[] args) {
SpringApplication.run(UserServiceApplication.class, args);
}
}
7. Spring Boot Actuator
Spring Boot Actuator is a tool for monitoring and managing Spring Boot applications. It can provide a lot of useful information such as application health, performance, logs, and more. This project is ideal for those applications that need to monitor and manage applications.
@RestController
@RequestMapping("/actuator")
public class ActuatorController {
@Autowired
private HealthEndpoint healthEndpoint;
@GetMapping("/health")
public Health health() {
return healthEndpoint. health();
}
}
8. Spring Boot Batch
Spring Boot Batch is a framework for batch processing. It can help you handle large amounts of data, such as batch import, batch processing, etc. This project is ideal for applications that need to process large amounts of data.
@Configuration
@EnableBatchProcessing
public class BatchConfig {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Autowired
private ItemReader<Person> reader;
@Autowired
private ItemProcessor<Person, Person> processor;
@Autowired
private ItemWriter<Person> writer;
@Bean
public Job importUserJob(JobCompletionNotificationListener listener) {
return jobBuilderFactory. get("importUserJob")
.incrementer(new RunIdIncrementer())
.listener(listener)
.flow(step1())
.end()
.build();
}
@Bean
public Step step1() {
return stepBuilderFactory. get("step1")
.<Person, Person> chunk(10)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
}
}
9. Spring Boot Webflux
Spring Boot Webflux is a framework for building reactive web applications. It can help you handle a large number of concurrent requests and improve the performance of your application. This project is ideal for applications that need to handle a large number of concurrent requests.
@RestController
public class UserController {
@Autowired
private UserRepository userRepository;
@GetMapping("/users")
public Flux<User> getAllUsers() {
return userRepository. findAll();
}
}
10. Spring Boot Kafka
Spring Boot Kafka is a framework for building Kafka messaging systems. It helps you build scalable, high-performance messaging systems. This project is very suitable for those applications that need to build a messaging system.
@Configuration
@EnableKafka
public class KafkaConfig {
@Value("${spring.kafka.bootstrap-servers}")
private String bootstrapServers;
@Bean
public Map<String, Object> consumerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
props.put(ConsumerConfig.GROUP_ID_CONFIG, "my-group");
return props;
}
@Bean
public ConsumerFactory<String, User> consumerFactory() {
return new DefaultKafkaConsumerFactory<>(consumerConfigs(), new StringDeserializer(),
new JsonDeserializer<>(User. class));
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, User> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, User> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
return factory;
}
}
11. Spring Boot Test
Spring Boot Test is a tool for unit testing and integration testing. It can help you quickly write and run test cases, improve code quality and maintainability. This project is ideal for those applications that need to write and run test cases.
@RunWith(SpringRunner. class)
@SpringBootTest
public class UserServiceTest {
@Autowired
private UserService userService;
@Test
public void testGetAllUsers() {
List<User> users = userService. getAllUsers();
assertEquals(3, users. size());
}
}
12. Spring Boot DevTools
Spring Boot DevTools is a tool for development. It helps you quickly restart applications, auto-configure and hot-deploy, etc. This project is ideal for applications that require rapid iterative development.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
Conclusion
The above are the 12 SpringBoot open source projects I recommend. Each item has its own unique function and purpose, making it ideal for different types of applications. If you are a Java developer, give these projects a try and learn and grow from them. Hope this article helps you!