If you are
using spring jpa, add below statements to application.properties file.
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
First
statement shows sql statements in console and second statement format sql
statements while printing in console.
Let’s see
a working application.
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 spring.jpa.properties.hibernate.enable_lazy_load_no_trans=true
Employee.java
package com.sample.app.model; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name = "employee") public class Employee { @Id @GeneratedValue @Column(name = "employee_id") private int id; @Column(name = "first_name") private String firstName; @Column(name = "last_name") private String lastName; public int getId() { return id; } public void setId(int 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; } }
EmployeeRepository.java
package com.sample.app.repository; import org.springframework.data.repository.CrudRepository; import com.sample.app.model.Employee; public interface EmployeeRepository extends CrudRepository<Employee, Integer> { }
App.java
package com.sample.app; 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 = new Employee(); emp1.setFirstName("Hari Krishna"); emp1.setLastName("Gurram"); employeeRepository.save(emp1); }; } }
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>springbootMisc</groupId> <artifactId>springbootMisc</artifactId> <version>1</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.6.RELEASE</version> </parent> <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>
Total
project structure looks like below.
Run
App.java, you can see below messages in console.
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.6.RELEASE) Hibernate: drop table employee if exists Hibernate: drop sequence if exists hibernate_sequence Hibernate: create sequence hibernate_sequence start with 1 increment by 1 Hibernate: create table employee ( employee_id integer not null, first_name varchar(255), last_name varchar(255), primary key (employee_id) ) Hibernate: call next value for hibernate_sequence Hibernate: insert into employee (first_name, last_name, employee_id) values (?, ?, ?)
You can
download the complete working application from this link.
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