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我有以下代码：与SortableDataProvider排序和Hibernate
PersonDao.java
@Repository
@Transactional
public class PersonDao implements PersonDaoIface {
Object property;
String order;
@Autowired
private SessionFactory sessionFactory;
public PersonDao() {
}
public PersonDao(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
@SuppressWarnings("unchecked")
@Override
public List<Person> getAll(long first, long count) {
Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Person.class);
this.setPaging(criteria, first, count);
addSort(criteria);
return criteria.list();
}
@Override
public long getAllCount() {
Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Person.class)
.setProjection(Projections.rowCount());
Long i = (Long) criteria.uniqueResult();
return i;
}
@Override
public List<Person> getByFilter(Person person, int first, int count) {
Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Person.class);
criteria.add(Restrictions.eq("firstName", person.getFirstName()));
criteria.add(Restrictions.eq("lastName", person.getLastName()));
this.setPaging(criteria, first, count);
return criteria.list();
}
@Override
public long getByFilterCount(Person person) {
Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Person.class);
criteria.add(Restrictions.eq("firstName", person.getFirstName()));
criteria.add(Restrictions.eq("lastName", person.getLastName()));
criteria.setProjection(Projections.rowCount());
Long result = (Long) criteria.uniqueResult();
return result;
}
private void setPaging(Criteria criteria, long first, long count) {
criteria.setFirstResult((int) first);
criteria.setMaxResults((int) count);
}
private void addSort(Criteria criteria) {
if (property != null) {
if (order.equalsIgnoreCase(SortOrder.ASCENDING.toString())) {
criteria.addOrder(Order.asc((String)property));
} else {
criteria.addOrder(Order.desc((String)property));
}
}
}
@Override
public void setSort(Object property, String order) {
this.property = property;
this.order = order;
}
}
SortableDataProvider
public class PersonSortableDataProvider extends SortableDataProvider {
private transient PersonDaoIface personDao;
public PersonSortableDataProvider(PersonDaoIface personDao) {
this.personDao = personDao;
}
public PersonSortableDataProvider() {
}
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Iterator<Person> iterator(long first, long count) {
System.out.println(getSort());
return personDao.getAll(first, count).iterator();
}
@Override
public long size() {
long result = personDao.getAllCount();
return result;
}
@Override
public IModel<Person> model(final Object object) {
return new AbstractReadOnlyModel<Person>() {
@Override
public Person getObject() {
return (Person) object;
}
};
}
}
用的面板使用排序数据提供的数据表
public DataDisplayPanel(String id) {
super(id);
List<IColumn> columns = new ArrayList<IColumn>();
columns.add(new PropertyColumn(new Model<String>("First Name"), "firstName"));
columns.add(new PropertyColumn(new Model<String>("Last Name"), "lastName"));
AjaxFallbackDefaultDataTable table = new AjaxFallbackDefaultDataTable("personData", columns,
personSortableDataProvider, 8);
table.addTopToolbar(new HeadersToolbar(table, personSortableDataProvider));
add(table);
}
我已经分页做没有问题，但我无法理解如何获得排序使用Hibernate，我可以看到你怎么可以从事物的Java方面的排序，但考虑到我可能会获得大量的数据集，我不喜欢这个想法。
鉴于我上面的代码是否有人有办法获取数据表，单击名或姓，然后使用附加的order by子句在迭代器中找到相同的查询。
是的，我终于添加了这个，但是当我点击列标题来改变顺序getSort（）。getProperty（）和isAscending值不会改变，任何想法？ – user1383163
我已经在PropertyColumns中添加了用于排序的额外参数以供参考。 – user1383163