1
我一直試圖修復這個dataTable的sortBy函數（Primefaces組件），但我只是不明白爲什麼它不工作，當其他功能如分頁或過濾器正常工作。對於這個dataTable，我只需要爲其標記屬性（稱爲「value」）傳遞一個數組，併爲標記屬性（稱爲「var」）指定一個同一類型的數組。在下面我會發布我的代碼。爲什麼這個dataTable sortBy函數不起作用？
這是DataTable中
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:t="http://myfaces.apache.org/tomahawk"
xmlns:p="http://primefaces.prime.com.tr/ui">
<ui:composition template="WEB-INF/templates/BasicTemplate.xhtml">
<ui:define name="resultsForm">
<h:form enctype="multipart/form-data">
<h:inputText id="search" value="" /><h:commandButton value="search"/>
<p:dataTable var="garbage" value="#{resultsController.allGarbage}" dynamic="true" paginator="true" paginatorPosition="bottom" rows="10"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="5,10,15">
<p:column filterBy="#{garbage.filename}" filterMatchMode="startsWith" sortBy="#{garbage.filename}" parser="string">
<f:facet name="header">
<h:outputText value="Filename" />
</f:facet>
<h:outputText value="#{garbage.filename}" />
</p:column>
<p:column filterBy="#{garbage.description}" filterMatchMode="contains">
<f:facet name="header">
<h:outputText value="Description" />
</f:facet>
<h:outputText value="#{garbage.description}" />
</p:column>
<p:column sortBy="#{garbage.uploadDate}" parser="string">
<f:facet name="header">
<h:outputText value="Upload date" />
</f:facet>
<h:outputText value="#{garbage.uploadDate}" />
</p:column>
</p:dataTable>
</h:form>
</ui:define>
這裏的託管Bean與該頁面交互的JSF頁面：
@ManagedBean
@RequestScoped
public class ResultsController {
@EJB
private ISearchEJB searchEJB;
private Garbage garbage;
public List<Garbage> getAllGarbage() {
return searchEJB.findAllGarbage();
}
public Garbage getGarbage() {
return garbage;
}
public void setGarbage(Garbage garbage) {
this.garbage = garbage;
}
的EJB訪問數據庫：
@Stateless(name = "ejbs/SearchEJB")
public class SearchEJB implements ISearchEJB {
@PersistenceContext
private EntityManager em;
public List<Garbage> findAllGarbage() {
Query query = em.createNamedQuery("findAllGarbage");
List<Garbage> gList = new ArrayList<Garbage>();
for (Object o : query.getResultList()) {
Object[] cols = (Object[]) o;
Garbage tmpG = new Garbage();
tmpG.setFilename(cols[0].toString());
tmpG.setDescription(cols[1].toString());
tmpG.setUploadDate(cols[2].toString());
gList.add(tmpG);
}
return gList;
}
}
與JPQL命名查詢實體使用：
@NamedQuery(name = "findAllGarbage", query = "SELECT g.filename, g.description, g.uploadDate FROM Garbage g;")
@Entity
public class Garbage {
@Id
@GeneratedValue
@Column(nullable = false)
private Long id;
@Column(nullable = false)
private String filename;
@Column(nullable = false)
private String fileType;
@Column(nullable = false)
private String uploadDate;
@Column(nullable = false)
private String destroyDate;
@Lob
@Column(nullable = false)
private byte[] file;
@Column(nullable = false)
private String description;
打印屏幕與瀏覽器輸出
控制檯輸出刷新頁面時 （嚴重：行1：61沒有可行的替代字符';'）：
PrimeFaces使用什麼版本？ – Mark 2011-03-30 12:43:05
我使用的版本是2.2.1 – sfrj 2011-03-30 12:53:31