我想,我的java代码是正确的,但记录没有显示在dataTable上。
请检查以下代码。我不知道我犯了什么错误。
.xhtml
<p:dataTable value="#{userDetailList.userDataList}" var="user" rows="5"
paginator="true" lazy="true"
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink}
{CurrentPageReport} {NextPageLink} {LastPageLink}">
<p:column headerText="No">
<h:outputText value="#{user.id}"></h:outputText>
</p:column>
<p:column headerText="User Name">
<h:outputText value="#{user.userName}"></h:outputText>
</p:column>
</p:dataTable>
的.java
@PostConstruct
public void init(){
// +getter , setter
userDataList = new LazyDataModel<UserDetail>(){
private static final long serialVersionUID = 1L;
@Override
public List<UserDetail> load(int first, int pageSize, String sortField,
SortOrder sortOrder, Map<String, String> filters) {
return lazyDataModelCom.getResultList(first, pageSize, sortField, sortOrder, filters);
}
};
}
getResultList
public List<UserDetail> getResultList(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, String> filters) {
Session session = HibernateUtils.getsession();
Criteria criteria = session.createCriteria(UserDetail.class);
criteria.addOrder(Order.asc("id"));
for (Map.Entry<String, String> entry : filters.entrySet()) {
if (entry.getValue() != null) {
criteria.add(Restrictions.ilike("id",
"%" + entry.getValue() + "%")); }
}
criteria.setMaxResults(pageSize);
criteria.setFirstResult(first);
return criteria.list();
}
getResultList 方法返回一个正确的值,我调试它。 我认为问题在 userDataList 。
答案 0 :(得分:8)
您的LazyDataModel
实施未设置rowCount。你应该做点什么:
public void init(){
// +getter , setter
userDataList = new LazyDataModel<UserDetail>(){
private static final long serialVersionUID = 1L;
@Override
public List<UserDetail> load(int first, int pageSize, String sortField,
SortOrder sortOrder, Map<String, String> filters) {
userDataList.setRowCount(...);
return lazyDataModelCom.getResultList(first, pageSize, sortField, sortOrder, filters);
}
};
userDataList.setRowCount(...);
}
注意<{1}}在分页之前的行数,但在过滤之后
。请参阅包含一个工作示例的this answer(唯一的区别是它使用JPA Criteria API而不是Hibernate Criteria):