Pros of Hibernate ORM

• Full ORM solution with automatic SQL generation and object/relational mapping
• Supports lazy loading and caching for improved performance
• Provides a rich query language (HQL) for complex queries

Cons of Hibernate ORM

• Steeper learning curve due to its complexity and feature-rich nature
• Can be overkill for simple database operations
• Performance overhead for simple CRUD operations

Code Comparison

Hibernate ORM:

@Entity
public class User {
    @Id
    private Long id;
    private String name;
    // Getters and setters
}

Session session = sessionFactory.openSession();
User user = session.get(User.class, 1L);

MyBatis:

public interface UserMapper {
    @Select("SELECT * FROM users WHERE id = #{id}")
    User getUser(Long id);
}

SqlSession session = sqlSessionFactory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
User user = mapper.getUser(1L);

MyBatis offers more control over SQL queries, while Hibernate ORM abstracts away most of the SQL, providing a more object-oriented approach. Hibernate is better suited for complex object relationships and large-scale applications, while MyBatis excels in scenarios where fine-grained SQL control is needed or for simpler database interactions.

Pros of jOOQ

• Type-safe SQL queries with compile-time checking
• Seamless integration with Java, allowing for fluent API usage
• Extensive support for various database-specific features

Cons of jOOQ

• Steeper learning curve due to its DSL approach
• Requires code generation step for optimal type-safety
• Commercial licensing for some databases and advanced features

Code Comparison

MyBatis-3:

<select id="selectPerson" parameterType="int" resultType="hashmap">
  SELECT * FROM PERSON WHERE ID = #{id}
</select>

jOOQ:

Result<Record> result = create.select()
    .from(PERSON)
    .where(PERSON.ID.eq(id))
    .fetch();

MyBatis-3 uses XML-based configuration for SQL queries, while jOOQ employs a fluent Java API for query construction. jOOQ provides stronger type-safety and better integration with Java code, but MyBatis-3 offers a more straightforward approach for developers familiar with SQL. MyBatis-3 is generally easier to set up and use for simple scenarios, while jOOQ shines in complex database interactions and when working with multiple database systems.

Pros of requery

• Modern, lightweight ORM with a fluent API for easier query building
• Supports reactive programming with RxJava integration
• Offers better performance for complex queries and large datasets

Cons of requery

• Smaller community and ecosystem compared to MyBatis
• Steeper learning curve for developers familiar with traditional SQL-based ORMs
• Less extensive documentation and fewer learning resources available

Code Comparison

MyBatis:

<select id="selectPerson" resultType="Person">
  SELECT * FROM Person WHERE id = #{id}
</select>

requery:

Result<Person> result = data
    .select(Person.class)
    .where(Person.ID.eq(id))
    .get();

Summary

requery is a modern ORM that offers a more fluent API and better performance for complex queries, while MyBatis provides a more traditional SQL-based approach with a larger community and ecosystem. The choice between the two depends on project requirements, team expertise, and performance needs.

Pros of JDBI

• More lightweight and focused on Java 8+ features
• Fluent API design for easier query building
• Better support for functional programming paradigms

Cons of JDBI

• Smaller community and ecosystem compared to MyBatis
• Less comprehensive documentation and learning resources
• Fewer advanced features for complex mapping scenarios

Code Comparison

JDBI:

Handle handle = jdbi.open();
List<User> users = handle.createQuery("SELECT * FROM users WHERE age > :age")
    .bind("age", 18)
    .mapTo(User.class)
    .list();

MyBatis:

SqlSession session = sqlSessionFactory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
List<User> users = mapper.getUsersOlderThan(18);

Summary

JDBI offers a more modern and lightweight approach to database access, with a focus on Java 8+ features and functional programming. It provides a fluent API for query building, making it easier to construct and execute database operations.

MyBatis, on the other hand, has a larger community and more extensive documentation. It offers more advanced features for complex mapping scenarios and is well-suited for projects with intricate database interactions.

The choice between JDBI and MyBatis depends on project requirements, team expertise, and preference for API style. JDBI may be more appealing for newer projects leveraging modern Java features, while MyBatis might be preferred for larger, more complex applications with extensive database mapping needs.