The derived query methods of Spring Data JPA support JPQL LIKE expressions via keyword 'Like'. For example:
public interface EmployeeRepository extends CrudRepository<Employee, Long> {
List<Employee> findByNameLike(String likeString);
}
Calling above method to find employee whose name ending with 'ana':
List<Employee> list = repo.findByNameLike("%ana")
Example
Entity
@Entity
public class Employee {
private @Id
@GeneratedValue
Long id;
private String name;
private String dept;
private int salary;
.............
}
Repository
public interface EmployeeRepository extends CrudRepository<Employee, Long> {
List<Employee> findByNameLike(String likeString);
List<Employee> findByDeptLike(String likeString);
}
Example Client
@Component
public class ExampleClient {
@Autowired
private EmployeeRepository repo;
public void run() {
List<Employee> employees = createEmployees();
repo.saveAll(employees);
System.out.println(" -- finding all employees --");
Iterable<Employee> all = repo.findAll();
all.forEach(System.out::println);
System.out.println(" -- finding employee with name like %ana --");
List<Employee> list = repo.findByNameLike("%ana");
list.forEach(System.out::println);
System.out.println(" -- finding employee with name like %a_a --");
list = repo.findByNameLike("%a_a");
list.forEach(System.out::println);
System.out.println(" -- finding employee with dept name more than 3 chars --");
list = repo.findByDeptLike("___%");
list.forEach(System.out::println);
}
private List<Employee> createEmployees() {
return Arrays.asList(
Employee.create("Diana", "Admin", 3000),
Employee.create("Mike", "IT", 1000),
Employee.create("Rose", "IT", 4000),
Employee.create("Sara", "Admin", 3500),
Employee.create("Tanaka", "IT", 3000),
Employee.create("Charlie", "IT", 4500)
);
}
}
Main class
public class ExampleMain {
public static void main(String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(AppConfig.class);
ExampleClient exampleClient = context.getBean(ExampleClient.class);
exampleClient.run();
EntityManagerFactory emf = context.getBean(EntityManagerFactory.class);
emf.close();
}
} -- finding all employees -- Employee{id=1, name='Diana', dept='Admin', salary=3000} Employee{id=2, name='Mike', dept='IT', salary=1000} Employee{id=3, name='Rose', dept='IT', salary=4000} Employee{id=4, name='Sara', dept='Admin', salary=3500} Employee{id=5, name='Tanaka', dept='IT', salary=3000} Employee{id=6, name='Charlie', dept='IT', salary=4500} -- finding employee with name like %ana -- Employee{id=1, name='Diana', dept='Admin', salary=3000} -- finding employee with name like %a_a -- Employee{id=1, name='Diana', dept='Admin', salary=3000} Employee{id=4, name='Sara', dept='Admin', salary=3500} Employee{id=5, name='Tanaka', dept='IT', salary=3000} -- finding employee with dept name more than 3 chars -- Employee{id=1, name='Diana', dept='Admin', salary=3000} Employee{id=4, name='Sara', dept='Admin', salary=3500}
Example ProjectDependencies and Technologies Used: - spring-data-jpa 2.0.9.RELEASE: Spring Data module for JPA repositories.
Uses org.springframework:spring-context version 5.0.8.RELEASE - hibernate-core 5.3.5.Final: Hibernate's core ORM functionality.
Implements javax.persistence:javax.persistence-api version 2.2 - h2 1.4.197: H2 Database Engine.
- JDK 1.8
- Maven 3.5.4
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