Spring Boot is built on the top of the spring and contains all the features of spring. And is becoming a favorite of developers these days because of its rapid production-ready environment which enables the developers to directly focus on the logic instead of struggling with the configuration and setup. Spring Boot is a microservice-based framework and making a production-ready application in it takes very little time. In this article, we will discuss how to change the column name in the Spring project using JPA. @Column annotation is used for Adding the column the name in the table of a particular MySQL database.
Syntax:
@Column(name=”DESC”, nullable=false, length=512)
public String getDescription() {
return description;
}
Attribute:
Name: The name of the column.
length: The column length.
nullable: Whether the database column is nullable.
Example
Step 1: Go to this link. Fill in the details as per the requirements. For this application:
Project: Maven Language: Java Spring Boot: 2.5.6 Packaging: JAR Java: 11 Dependencies: Spring Web,Spring Data JPA, MySql Driver
Click on Generate which will download the starter project.
Step 2: Extract the zip file. Now open a suitable IDE and then go to File > New > Project from existing sources > Mapping and select pom.xml. Click on import changes on prompt and wait for the project to sync as pictorially depicted below as follows:
Step 3: Adding the necessary properties in the application.properties file. (mapping is the database name)
spring.datasource.username=root spring.datasource.password=Aayush spring.datasource.url=jdbc:mysql://localhost:3306/mapping spring.jpa.hibernate.ddl-auto=update
Step 4: Create a model folder in the project folder and make a StudentInformation class.
ProjectStructrure:
StudentInformation.java
Java
@Entity@Table(name = "Student")public class StudentInformation { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private int rollno; @Column(name = "Student_name") private String name; public int getRollno() { return rollno; } public StudentInformation() {} public StudentInformation(int rollno, String name) { this.rollno = rollno; this.name = name; } public void setRollno(int rollno) { this.rollno = rollno; } public String getName() { return name; } public void setName(String name) { this.name = name; }} |
Run the main application:
Database output:
