There are three ways to get the result using ‘in’ query.
Approach 1: Using spring repository query method. In, IsIn keyword expressions are used to execute an in query.
public List<Employee> findByIdIn(List<Integer> ids);
public List<Employee> findByIdIsIn(List<Integer> ids);
Approach 2: Explicitly specifying the jpa query.
@Query( "select e from Employee e where id in :ids" )
public List<Employee> getEmpsByIds(@Param("ids") List<Integer> ids);
Approach 3: Explicitly specifying sql native query.
@Query(value="select * from employees e where e.employee_id in :ids", nativeQuery=true)
public List<Employee> getEmpsByIdsUsingNativeQuery(@Param("ids") List<Integer> ids);
Find the below working application.
Step 1: Create new maven project ‘in_query_demo’.
Step 2: Update pom.xml with maven dependencies.
pom.xml
<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.sample.app</groupId>
<artifactId>in_query_demo</artifactId>
<version>1</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
</dependencies>
</project>
Step 3: Create application.properties file under src/main/resources.
application.properties
logging.level.root=WARN logging.level.org.hibernate=ERROR ## H2 specific properties spring.h2.console.enabled=true spring.h2.console.path=/h2 spring.datasource.url=jdbc:h2:file:~/db/myOrg.db;DB_CLOSE_ON_EXIT=FALSE;DB_CLOSE_DELAY=-1; spring.datasource.username=krishna spring.datasource.password=password123 spring.datasource.driverClassName=org.h2.Driver ## JPA specific properties # Creates the schema, destroying previous data. spring.jpa.hibernate.ddl-auto=create spring.jpa.database-platform=org.hibernate.dialect.H2Dialect #spring.jpa.show-sql=true #spring.jpa.properties.hibernate.format_sql=true ## Database connection pooling properties # Number of ms to wait before throwing an exception if no connection is available. spring.datasource.max-wait=10000 # Maximum number of active connections that can be allocated from this pool at the same time. spring.datasource.tomcat.max-active=10 spring.datasource.tomcat.max-idle=5 spring.datasource.tomcat.min-idle=3
Step 4: Create a package com.sample.app.model and define Employee entity.
Employee.java
package com.sample.app.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "employees")
public class Employee {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "employee_id")
private Integer id;
@Column(name = "first_name")
private String firstName;
@Column(name = "last_name")
private String lastName;
@Column(name = "age")
private Integer age;
@Column(name = "salary")
private Double salary;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Double getSalary() {
return salary;
}
public void setSalary(Double salary) {
this.salary = salary;
}
public static EmployeeBuilder builder() {
return new EmployeeBuilder();
}
public static class EmployeeBuilder {
private Employee emp;
public EmployeeBuilder() {
emp = new Employee();
}
public EmployeeBuilder firstName(String firstName) {
emp.setFirstName(firstName);
return this;
}
public EmployeeBuilder lastName(String lastName) {
emp.setLastName(lastName);
return this;
}
public EmployeeBuilder age(int age) {
emp.setAge(age);
return this;
}
public EmployeeBuilder salary(double salary) {
emp.setSalary(salary);
return this;
}
public Employee build() {
return emp;
}
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Employee [id=").append(id).append(", firstName=").append(firstName).append(", lastName=")
.append(lastName).append(", age=").append(age).append(", salary=").append(salary).append("]");
return builder.toString();
}
}
Step 5: Create com.sample.app.repository package and define EmployeeRepository interface.
EmployeeRepository.java
package com.sample.app.repository;
import java.util.List;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
import com.sample.app.model.Employee;
public interface EmployeeRepository extends CrudRepository<Employee, Integer> {
public List<Employee> findByIdIn(List<Integer> ids);
public List<Employee> findByIdIsIn(List<Integer> ids);
@Query( "select e from Employee e where id in :ids" )
public List<Employee> getEmpsByIds(@Param("ids") List<Integer> ids);
@Query(value="select * from employees e where e.employee_id in :ids", nativeQuery=true)
public List<Employee> getEmpsByIdsUsingNativeQuery(@Param("ids") List<Integer> ids);
}
Step 6: Define App class in com.sample.app package.
App.java
package com.sample.app;
import java.util.Arrays;
import java.util.List;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import com.sample.app.model.Employee;
import com.sample.app.repository.EmployeeRepository;
@SpringBootApplication
public class App {
public static void main(String args[]) {
SpringApplication.run(App.class, args);
}
@Bean
public CommandLineRunner demo(EmployeeRepository employeeRepository) {
return (args) -> {
Employee emp1 = Employee.builder().firstName("Ram").lastName("Gurram").age(32).salary(100000.23).build();
Employee emp2 = Employee.builder().firstName("Joel").lastName("Chelli").age(43).salary(60000).build();
Employee emp3 = Employee.builder().firstName("Gopi").lastName("Battu").age(45).salary(1000000).build();
Employee emp4 = Employee.builder().firstName("Bomma").lastName("Srikanth").age(39).salary(60000).build();
Employee emp5 = Employee.builder().firstName("Surendra").lastName("Sami").age(32).salary(100000.23).build();
Employee emp6 = Employee.builder().firstName("Srinu").lastName("Gurram").age(32).salary(100000.23).build();
Employee emp7 = Employee.builder().firstName("Purnima").lastName("Chelli").age(28).salary(10000.23).build();
employeeRepository.save(emp1);
employeeRepository.save(emp2);
employeeRepository.save(emp3);
employeeRepository.save(emp4);
employeeRepository.save(emp5);
employeeRepository.save(emp6);
employeeRepository.save(emp7);
System.out.println("Get all the employees whose id is in 2, 3, 5\n");
List<Employee> emps = employeeRepository.findByIdIn(Arrays.asList(2, 3, 5));
emps.stream().forEach(System.out::println);
System.out.println("\n\n");
emps = employeeRepository.findByIdIsIn(Arrays.asList(2, 3, 5));
emps.stream().forEach(System.out::println);
System.out.println("\n\n");
emps = employeeRepository.getEmpsByIds(Arrays.asList(2, 3, 5));
emps.stream().forEach(System.out::println);
System.out.println("\n\n");
emps = employeeRepository.getEmpsByIdsUsingNativeQuery(Arrays.asList(2, 3, 5));
emps.stream().forEach(System.out::println);
};
}
}
Run App.java, you will see below messages in console.
Get all the employees whose id is in 2, 3, 5 Employee [id=2, firstName=Joel, lastName=Chelli, age=43, salary=60000.0] Employee [id=3, firstName=Gopi, lastName=Battu, age=45, salary=1000000.0] Employee [id=5, firstName=Surendra, lastName=Sami, age=32, salary=100000.23] Employee [id=2, firstName=Joel, lastName=Chelli, age=43, salary=60000.0] Employee [id=3, firstName=Gopi, lastName=Battu, age=45, salary=1000000.0] Employee [id=5, firstName=Surendra, lastName=Sami, age=32, salary=100000.23] Employee [id=2, firstName=Joel, lastName=Chelli, age=43, salary=60000.0] Employee [id=3, firstName=Gopi, lastName=Battu, age=45, salary=1000000.0] Employee [id=5, firstName=Surendra, lastName=Sami, age=32, salary=100000.23] Employee [id=2, firstName=Joel, lastName=Chelli, age=43, salary=60000.0] Employee [id=3, firstName=Gopi, lastName=Battu, age=45, salary=1000000.0] Employee [id=5, firstName=Surendra, lastName=Sami, age=32, salary=100000.23]
You can download the complete working application from below link.
https://github.com/harikrishna553/springboot/tree/master/jpa/in_query_demo
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