普通数据访问对象,这个是Hibernate官方网站上面的一个DAO类的设计模式,基于JDK5.0范型支持,文章地址如下:http://www.hibernate.org/328.html
作者:中国IT实验室 来源:中国IT实验室 2007年8月26日
关键字:
- @SuppressWarnings("unchecked")
- public T findById(ID id, boolean lock)
- {
- T entity;
- if (lock)
- entity = (T) getSession().load(getPersistentClass(), id, LockMode.UPGRADE);
- else
- entity = findById(id);
-
- return entity;
- }
-
- @SuppressWarnings("unchecked")
- public List findAll()
- {
- return findByCriteria();
- }
-
- @SuppressWarnings("unchecked")
- public List findByExample(T exampleInstance)
- {
- Criteria crit = getSession().createCriteria(getPersistentClass());
- Example example = Example.create(exampleInstance);
- crit.add(example);
- return crit.list();
- }
-
- @SuppressWarnings("unchecked")
- public List findByExample(T exampleInstance, String[] excludeProperty)
- {
- Criteria crit = getSession().createCriteria(getPersistentClass());
- Example example = Example.create(exampleInstance);
- for (String exclude : excludeProperty)
- {
- example.excludeProperty(exclude);
- }
- crit.add(example);
- return crit.list();
- }
-
- @SuppressWarnings("unchecked")
- public T makePersistent(T entity)
- {
- getSession().saveOrUpdate(entity);
-
- return entity;
- }
-
- public void makeTransient(T entity)
- {
- getSession().delete(entity);
- }
-
- @SuppressWarnings("unchecked")
- protected List findByCriteria(Criterion... criterion)
- {
- Criteria crit = getSession().createCriteria(getPersistentClass());
- for (Criterion c : criterion)
- {
- crit.add(c);
- }
- return crit.list();
- }
-
- @SuppressWarnings("unchecked")
-
-
-
- protected List findByCriteria(Order order,Criterion... criterion)
- {
- Criteria crit = getSession().createCriteria(getPersistentClass());
- for (Criterion c : criterion)
- {
- crit.add(c);
- }
- if(order!=null)
- crit.addOrder(order);
- return crit.list();
- }
-
- @SuppressWarnings("unchecked")
- protected List findByCriteria(int firstResult,int rowCount,Order order,Criterion... criterion)
- {
- Criteria crit = getSession().createCriteria(getPersistentClass());
- for (Criterion c : criterion)
- {
- crit.add(c);
- }
- if(order!=null)
- crit.addOrder(order);
- crit.setFirstResult(firstResult);
- crit.setMaxResults(rowCount);
- return crit.list();
- }
- }