Contoh Program Framework Spring Netbeans Dengan Postgresql

 package com.unitomo.entities;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity

public class Mahasiswa {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;
    private String nama;
    private String nim;

    public Mahasiswa() {

    }
    public Mahasiswa(String nama){
    this.nama=nama;
    }

    public Mahasiswa( String nama, String nim) {
     
        this.nama = nama;
        this.nim = nim;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getNama() {
        return nama;
    }

    public void setNama(String nama) {
        this.nama = nama;
    }

    public String getNim() {
        return nim;
    }

    public void setNim(String nim) {
        this.nim = nim;
    }

}

package com.unitomo.repository;

/**

 *

 * @author Della Emilia

 */

    import com.unitomo.entities.Mahasiswa;

import java.util.List;

import java.io.Serializable;

import org.springframework.data.jpa.repository.JpaRepository;

/**

 *

 * @author Della Emilia

 */

public interface MahasiswaRepository extends JpaRepository<Mahasiswa, Long>{

    List<Mahasiswa>findByNama (String nama);

}

package com.unitomo;

import com.unitomo.entities.Mahasiswa;

import com.unitomo.repository.MahasiswaRepository;

import java.util.ArrayList;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.CommandLineRunner;

import org.springframework.stereotype.Component;

/**

 *

 * @author Della Emilia

 */

@Component

public class IsiDataMahasiswa implements CommandLineRunner {

    private final MahasiswaRepository mhsRepository;

    @Autowired

    public IsiDataMahasiswa(MahasiswaRepository mhsRepository) {

        this.mhsRepository = mhsRepository;

    }

    @Override

    public void run(String... strings) throws Exception {

        List<Mahasiswa> mahasiswas = new ArrayList<>();

        mahasiswas.add(new Mahasiswa("2013420001"));

        mahasiswas.add(new Mahasiswa("2013420002", "Fulan2"));

        mahasiswas.add(new Mahasiswa("2013420003", "Fulan3"));

        mahasiswas.add(new Mahasiswa("2013420004", "Fulan4"));

        mhsRepository.save(mahasiswas);

    }

}

dan kemudian pada application.properties

spring.jpa.database=POSTGRESQL

spring.datasource.platform=postgres

spring.jpa.show-sql=true

spring.jpa.hibernate.ddl-auto=create-drop

spring.database.driverClassName=org.postgresql.Driver

spring.datasource.url=jdbc:postgresql://localhost:5432/fw

spring.datasource.username=postgres

spring.datasource.password=postgres