JSF的服务器端分页的实现
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2022-07-12 15:20:04
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相信对JSF有一定了解的童鞋,都知道怎么用dataGrid显示数据,一般情况我都是用的都是客户端分页,闲来无事按照例子写了个服务器端分页,话不多说,贴代码:
@Inject(value = "employeeSpringService")
private IEmployeeService es;
@Bind(id = "grid", attribute = "value")
private GridDataProvider dataProvider = new CachedPagedDataProviderAdapter(
new CachedPagedDataProvider() {
@Override
public Object getData(int start, int limit) {
return es.limitQuery(start, limit).toArray();
}
@Override
public int getTotalCount() {
List list=es.getTotal();
return ((Long)list.get(0)).intValue();
}
});
public List<Employee> limitQuery(int start,int limit) {
logger.debug("finding the queried Employee instances");
try {
DetachedCriteria dc=DetachedCriteria.forClass(Employee.class);
List<Employee> results = (List<Employee>) getHibernateTemplate().findByCriteria(dc, start, limit);
logger.debug("find queried successful, result size: " + results.size());
return results;
} catch (RuntimeException re) {
logger.error("find queried failed", re);
throw re;
}
}
public List getTotal() {
logger.debug("finding the queried Employee instances");
try {
List results =getHibernateTemplate().find("select count(*) FROM Employee");
logger.debug("find queried successful, result size: " + results.size());
return results;
} catch (RuntimeException re) {
logger.error("find queried failed", re);
throw re;
}
}
主要就是getHibernateTemplate().findByCriteria()方法。。。
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