BaseDao
import java.util.List;
public interface BaseDao<T> {
public void save(T t);
public void update(T t);
public void delete(Integer id);
public T findById(Integer id);
public List<T> findByHQL(String hql, Object... params);
}
2.BaseDaoImpl
import java.lang.reflect.ParameterizedType;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import com.medicinemanage.dao.BaseDao;
public class BaseDaoImpl<T> implements BaseDao<T> {
private Class<T> clazz;
@SuppressWarnings("unchecked")
public BaseDaoImpl() {
ParameterizedType type = (ParameterizedType) this.getClass()
.getGenericSuperclass();
clazz = (Class<T>) type.getActualTypeArguments()[0];
System.out.println("DAO的真實實現類是：" + this.clazz.getName());
}
@Resource
private SessionFactory sessionFactory;
// 獲取當前session
protected Session getSession() {
return this.sessionFactory.getCurrentSession();
}
@Override
public void save(T t) {
getSession().save(t);
}
@Override
public void update(T t) {
getSession().update(t);
}
@Override
public void delete(Integer id) {
getSession().delete(this.findById(id));
}
@SuppressWarnings("unchecked")
@Override
public T findById(Integer id) {
return (T) getSession().get(this.clazz, id);
}
@SuppressWarnings("unchecked")
@Override
public List<T> findByHQL(String hql, Object... params) {
Query query = getSession().createQuery(hql);
for (int i = 0; params != null && i < params.length; i++) {
query.setParameter(i, params[i]);
}
return query.list();
}
}
3.BaseService
import java.util.List;
public interface BaseService<T> {
public void save(T entity);
public void update(T entity);
public void delete(Integer id);
public T getById(Integer id);
public List<T> getByHQL(String hql, Object... params);
}
4.BaseServiceImpl
import java.util.List;
import javax.annotation.Resource;
import org.springframework.transaction.annotation.Transactional;
import com.medicinemanage.dao.BaseDao;
import com.medicinemanage.service.BaseService;
@Transactional
public class BaseServiceImpl<T> implements BaseService<T> {
// 注入BaseDao
private BaseDao<T> dao;
@Resource
public void setDao(BaseDao<T> dao) {
this.dao = dao;
}
@Override
public void save(T entity) {
dao.save(entity);
}
@Override
public void update(T entity) {
dao.update(entity);
}
@Override
public void delete(Integer id) {
dao.delete(id);
}
@Override
public T getById(Integer id) {
return dao.findById(id);
}
@Override
public List<T> getByHQL(String hql, Object... params) {
return dao.findByHQL(hql, params);
}
}
5.具體以Breakage對象來實例化
a.BreakageDao
import com.medicinemanage.model.Breakage;
public interface BreakageDao extends BaseDao<Breakage> {
}
b.BreakageDaoImpl
import org.springframework.stereotype.Repository;
import com.medicinemanage.dao.BreakageDao;
import com.medicinemanage.model.Breakage;
@Repository("breakageDao")
public class BreakageDaoImpl extends BaseDaoImpl<Breakage> implements BreakageDao{
}
c.BreakageService
import com.medicinemanage.model.Breakage;
public interface BreakageService extends BaseService<Breakage> {
}
d.breakageServiceImpl
import javax.annotation.Resource;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.medicinemanage.dao.BaseDao;
import com.medicinemanage.model.Breakage;
import com.medicinemanage.service.BreakageService;
@Repository("breakageService")
@Transactional
public class BreakageServiceImpl extends BaseServiceImpl<Breakage> implements BreakageService {
//注入dao
@Resource(name="breakageDao")
public void setDao(BaseDao<Breakage> breakageDao) {
super.setDao(breakageDao);
}
}