Dora's programming blog
This work begin with connect PostgreSQL database in Netbeans. I show how it do in How set connection to PostgreSQL 9.6 database in Netbeans 8 ? my post and I show how set driver for PostgreSQL in post How add new PostgreSQL 9.6 driver in Netbeans 8?
If you set driver for PostgreSQL and set connection in Netbeans 8 you can create Maven
project.
Choose in Netbeans 8 IDE from menu File->New Project
.
The windowNew Project
was displayed. From Categories
section choose Maven
and from Projects
choose Java Application
.
Click the Next
button. The New Java Application
appears. In Projects Name
field write AppMaven
name.
Click the Finish
button. Look at Projects
window in IDE.
Expands nodes in your project. Right click the pom.xml file and coose Open.
You see source this file:
It is configuration file for Maven project.
Go to the website with Maven repository:
http://mvnrepository.com
and write and search dependences for hibernate
.
Choose Core Hibernate
.
Click the last version. You may download JAR file or copy dependence for Maven configuration file.
In pom.xml
file create dependencies element and from Maven repository website copy this dependency and paste it in pom.xml
file in Netbeans.
In the same way search and copy JPA
dependency:
And PostgreSQL dependency:
In Services
window you can check jdbc driver version for PostgreSQL. In my it is 9.4.1212.jre6
version
so I select the same version in dependency.
And it is all dependencies in pom.xml
file:
OK. This part work is done. Now You may create Entity class
for table in database. If you have mydb
database and not created in it department
table, for new table file named Department
.
Right click the Source Package
node and choose Entity Class
.
If it is not available click the Other
and in New File
window select Persistence
from Categories
and Entity Class
from File Types
and click the Next
button.
In New Entity Class
window write in Class Name
field Department
and in Package
write any package for this class. To leave check Create Persitence Unit
.
Click the Next
button. You see New File
window as this:
Select property connection to your database. If you hasn’t department table, can check Create
button.
Click the Finish
button.
The Department.java
file and persistence.xml
appear.
The table department in mydb database may have two columns: id and name. The generated entity has only one id column;
So you may add name
field
and generate set
and get
methods for it:
The file after corrects :
Look at persistence.xml
file:
And in Design
version:
And the last work it is create main class for create department
table and add data into it in mydb
database.
So right click the package node and choose Java Main Class
.
In Class Name
write name of class: AddedData
.
Click the Finish
button.
In static method paste this code:
package doraprojects.net; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class AddedData { public static void main(String[] args) { EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("net.doraprojects_AppMaven_jar_5.2.6.FinalPU"); EntityManager entityManager = entityManagerFactory.createEntityManager(); entityManager.getTransaction().begin(); Department d1 = new Department(); d1.setName("Financial"); entityManager.persist(d1); Department d2 = new Department(); d2.setName("Accountancy"); entityManager.persist(d2); entityManager.getTransaction().commit(); entityManager.close(); entityManagerFactory.close(); } }
Run application.
If this window appears, click the Generate
button.
Before Tables node in database:
After run application:
If you view data set, you see data in table which you insert into main class:
If you would like another time run application to add other record in department
table, first change persitence.xml
file.
Open this file. The table was created so to add another record you should change Table Generation Strategy
from Create
to None
.
Save this file(Ctrl+S).
Change AddedData.java
file:
package doraprojects.net; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class AddedData { public static void main(String[] args) { EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("net.doraprojects_AppMaven_jar_5.2.6.FinalPU"); EntityManager entityManager = entityManagerFactory.createEntityManager(); entityManager.getTransaction().begin(); Department d1 = new Department(); d1.setName("Human resources"); entityManager.persist(d1); entityManager.getTransaction().commit(); entityManager.close(); entityManagerFactory.close(); } }
Run application and see result in data view in database.
Right click the department
table and choose View Data
.
It is all record in department table.
The post Maven Project in Netbeans 8 with JPA 2, Hibernate 5 and PostgreSQL 9.6 database appeared first on Dora's programming blog.
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