Dao

package com.websekolah.projekwebsekolah.dao;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Date;
import java.util.List;

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

import com.websekolah.projekwebsekolah.model.Barang;
import com.websekolah.projekwebsekolah.repository.RepositoryBarang;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

/**
 * BarangDao
 */
@Service
public class BarangDao implements RepositoryBarang {

    private EntityManagerFactory emf;

    @Autowired
    public void setemf(EntityManagerFactory emf) {
        this.emf = emf;
    }

    @Override
    public List<Barang> baranglist() {
        // TODO Auto-generated method stub
        EntityManager entityManager = emf.createEntityManager();
        return entityManager.createQuery("from Barang", Barang.class).getResultList();
    }

    @Override
    public Barang saveOrUpdate(MultipartFile imagefile, Barang barang) throws IOException {
        // TODO Auto-generated method stub
        // Instantiate a Date object

        //membuat tgl
        Date date = new Date();
        String tgl = String.format("%1$s %2$tB %2$td, %2$tY", "", date);

        //membuat direktory foto dan penyimpanan fotonya
        Path absolutePath = Paths.get(".");
        byte[] bytes = imagefile.getBytes();
        Path path = Paths.get(absolutePath + "/src/main/resources/static/img/" + imagefile.getOriginalFilename());
        //Path path = Paths.get("D:/java/gambar/" + imagefile.getOriginalFilename());
        Files.write(path, bytes);
        barang.setFoto(imagefile.getOriginalFilename());

        EntityManager entityManager = emf.createEntityManager();
        int harga = Integer.parseInt(barang.getHargabarang());
        int jumlahbarang = Integer.parseInt(barang.getJumlahbarang());
        int hasil = harga * jumlahbarang;
        barang.setTotalharga(Integer.toString(hasil));
        barang.setNotifikasi(false);
        barang.setDate(tgl);

        entityManager.getTransaction().begin();
        /*
         * merge akan mengecek ke idnya jika datanya ada maka akan update, dan jika
         * datanya tidak ada maka dia akan melakukan insert
         */
        Barang saved = entityManager.merge(barang);
        entityManager.getTransaction().commit();
        return saved;
    }

    @Override
    public Barang getIdBarang(Integer idbarang) {
        EntityManager em = emf.createEntityManager();
        return em.find(Barang.class, idbarang);
    }

    @Override
    public void hapus(Integer id) {
        // TODO Auto-generated method
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        em.remove(em.find(Barang.class, id));
        em.getTransaction().commit();
    }
}