JPA update data Example

In this section, you know how to update the database data through the jpa.

JPA update data Example

JPA update data Example

     

In this section, you know how to update the database data through the jpa. You follow the following steps for updating the data. To update the data into database you can follow the following steps:

  • Load the business object
  • Update the data
  • Save (persist) the data using JPA merge() method

Follow the following steps to develop the example code to update the data into database. Create a "JPAUpdate.java" file.

Put the following text.

Update code:

/**
* 
*/
package roseindia;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

/**
* @author Administrator
*
*/
public class JPAUpdate {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

EntityManagerFactory emf = Persistence.createEntityManagerFactory("jpa");
EntityManager em = emf.createEntityManager();
try{
em.getTransaction().begin();
//find 
Student stud1 = em.find(Student.class,1);
stud1.setSname("Deepak");
//update
em.merge(stud1);
em.getTransaction().commit();
}
catch(Exception e){
System.out.println(e.getMessage());
}
finally{
em.close();
}
}

}
Run it and get the output in "Console window" of eclipse.

Check it in MySQL.

Tutorials

  1. JPA update data Example
  2. JPA delete data
  3. JPA Crud
  4. Developing JPA CURD Application with Eclipse
  5. JPA read data from database example
  6. JPA delete data
  7. Developing JPA CURD Application with NetBeans
  8. Creating and running the JPA CRUD application
  9. Add Jar in JPA project
  10. Creating and running the JPA CRUD application
  11. JPA read data from database example
  12. JPA update data
  13. Creating files in jpa project
  14. JPA delete data
  15. JPA update data
  16. JPA update data
  17. Select your project and right click on the it