Question

我在primefaces 5.0上使用datatable的filterFunction方法。我想按列标题上的日期范围过滤生日。

在浏览器控制台上，我收到此错误：

<?xml version="1.0"
   encoding="utf-8"?><partial-response><error><error-name>java.lang.ClassCastException</error-name><error-message><![CDATA[javax.faces.component.UIPanel
   cannot be cast to
   javax.faces.component.ValueHolder]]></error-message></error></partial-response>

数据表：

 <p:dataTable var="person" value="#{testDateRange.persons}"
              id="personTable" paginator="true" styleClass="customTableStyle" editable="true"
              rows="10"  resizableColumns="true"
              emptyMessage="No persons"
              filteredValue="#{testDateRange.filteredPersons}"
              widgetVar="dateRangeWidget" >

     <p:column id="nameId" filterBy="name" sortBy="name" filterMatchMode="contains" headerText="Name">
         <h:outputText value="#{person.name}" />
     </p:column>

     <p:column id="birthdayId" headerText="birthday" filterBy="birthday" filterFunction="#{testDateRange.filterByDate}">
         <f:facet name="filter">
             <p:calendar id="from" value="#{testDateRange.dateFrom}"   styleClass="customCalendar" pattern="dd/MM/yyyy">
                 <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" update="personTable"/>
             </p:calendar>
             <p:calendar id="to" value="#{testDateRange.dateTo}" styleClass="customCalendar" pattern="dd/MM/yyyy">
                 <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" update="personTable"/>
             </p:calendar>
         </f:facet>
         <h:outputText value="#{person.birthday}"  >
             <f:convertDateTime pattern="dd/MM/yyyy"/>
         </h:outputText>
     </p:column>
 </p:dataTable>

豆：

@Component("testDateRange")
@Scope("session")
public class TestDateRangeBean {

    private List<Person> persons;
    List<Person> filteredPersons;
    private Date dateFrom;
    private Date dateTo;

    public TestDateRangeBean() {
        persons = new ArrayList<>(Arrays.asList(
            new Person("John", new Date(1357016400000L)),
            new Person("Will",new Date(1357102800000L)),
            new Person("Peter",new Date(1414900800000L)),
            new Person("Cris", new Date(1438747200000L)),
            new Person("Cemil", new Date(1436068800000L))
        ));
    }

    public boolean filterByDate(Object value, Object filter, Locale locale) {
        // it fails before calling this method
        String filterText = (filter == null) ? null : filter.toString().trim();
        if(StringUtils.isEmpty(filterText)) {
            return true;
        }
        if(value == null) {
            return false;
        }
        DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
        Date filterDate;
        try {
            filterDate = df.parse(filterText);
        } catch (ParseException e) {
            return false;
        }
        return filterDate.after(dateFrom) &&  filterDate.before(dateTo);
    } 
    //all the getters and setters

enter image description here

我有一个简单的POJO Person类，只包含'name'和'birthday'。

如何按照我在列标题上输入的日期过滤生日。我看到它获取UIPanel组件而不是日期值。（我假设它期望一个组件有一个值，当它找到两个组件时，它返回容器组件本身，我是对的吗？）

由于

Answer 1

如果您不希望使用隐藏输入字段的技巧以及重用此类过滤器的好处，请考虑编写其组件类型扩展为javax.faces.component.UIInput的复合组件。 Primefaces期望过滤器是javax.faces.component.ValueHolder的子类型。

这就是复合组件的外观。

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
      xmlns:p="http://primefaces.org/ui"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:cc="http://java.sun.com/jsf/composite"
      xmlns:f="http://java.sun.com/jsf/core"
  xmlns:h="http://java.sun.com/jsf/html">

<!-- INTERFACE -->
<cc:interface componentType="dateRange">
    <cc:attribute name="fromLabel"/>
    <cc:attribute name="toLabel"/>
    <cc:attribute name="value" type="so.example.DateRange"/>
    <cc:attribute name="onvaluechanged"/>
</cc:interface>

<!-- IMPLEMENTATION -->
<cc:implementation>
    <table>
        <tr>
            <td style="width: 15%; border: none;">
                <h:outputText value="#{cc.attrs.fromLabel}"/>
            </td>
            <td style="width: 35%; border: none;">
                <p:calendar id="startDateCalendar" value="#{cc.attrs.value.from}" maxdate="#{cc.attrs.value.to}">
                    <p:ajax event="dateSelect" update="endDateCalendar" oncomplete="#{cc.attrs.onvaluechanged}"/>
                </p:calendar>
            </td>
            <td style="width: 15%; border: none;">
                <h:outputText value="#{cc.attrs.toLabel}"/>
            </td>
            <td style="width: 35%; border: none;">
                <p:calendar id="endDateCalendar" value="#{cc.attrs.value.to}" mindate="#{cc.attrs.value.from}" maxdate="#{cc.attrs.value.now}">
                    <p:ajax event="dateSelect" update="startDateCalendar" oncomplete="#{cc.attrs.onvaluechanged}"/>
                </p:calendar>
            </td>
        </tr>
    </table>
</cc:implementation>

注意componentType="dateRange"标记中的cc:interface。这引用了此复合组件的根组件类。这很简单。

@FacesComponent("dateRange")
public class DateRangeComponent extends UIInput implements NamingContainer {

    @Override
    public String getFamily() {
        return UINamingContainer.COMPONENT_FAMILY;
    }

}

复合组件所采用的值是一个简单的POJO。

public class DateRange implements Serializable {

    private Date from;
    private Date to;
    private boolean ignoreTime = true;

    public Date getFrom() {
        return from;
    }

    public void setFrom(Date from) {
        if (this.isIgnoreTime()) {
            Calendar now = Calendar.getInstance();
            now.setTime(from);
            now.set(Calendar.HOUR_OF_DAY, 0);
            now.set(Calendar.MINUTE, 0);
            now.set(Calendar.SECOND, 0);
            this.from = now.getTime();
        } else {
            this.from = from;
        }
    }

    public Date getTo() {
        return to;
    }

    public void setTo(Date to) {
        if (this.isIgnoreTime()) {
            Calendar now = Calendar.getInstance();
            now.setTime(to);
            now.set(Calendar.HOUR_OF_DAY, 23);
            now.set(Calendar.MINUTE, 59);
            now.set(Calendar.SECOND, 59);
            this.to = now.getTime();
        } else {
            this.to = to;
        }
}

public Date getNow() {
    return new Date();
}

public boolean isIgnoreTime() {
    return ignoreTime;
}

public void setIgnoreTime(boolean ignoreTime) {
    this.ignoreTime = ignoreTime;
}
}

毕竟用法非常简单。

            <p:column headerText="#{labels.date}"
                      sortBy="#{logIn.loginDate}"
                      filterBy="#{logIn.loginDate}"
                      filterFunction="#{logInTableBean.filterByDate}"
                      styleClass="datetime-column">
                <f:facet name="filter">
                    <clx:dateRange fromLabel="#{labels.from}" 
                                   toLabel="#{labels.to}" 
                                   onvaluechanged="PF('logInTable').filter();"
                                   value="#{logInTableBean.range}"/>
                </f:facet>
                <h:outputText value="#{logIn.loginDate}">
                    <f:convertDateTime type="both" dateStyle="long"/>
                </h:outputText>
            </p:column>

另请注意自定义过滤器功能。这很简单

public boolean filterByDate(Object value, Object filter, Locale locale) {
    Date colDate = (Date) value;
    return this.range.getFrom().before(colDate) && this.range.getTo().after(colDate);
}

整件事情看起来都像这样。

daterangefilter

Answer 2

高级解决方案：

JSF：

<p:column headerText="#{msg.date}" sortBy="#{bean.date}" filterBy="#{bean.date}" filterFunction="#{dateRangeFilter.filterByDate}">
  <f:facet name="filter">
    <h:inputHidden id="filter" />
  </f:facet>
  <f:facet name="header">
    <h:outputText value="#{msg.date}" />
    <br />
    <p:calendar id="from" pattern="dd.MM.yyyy">
      <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '-' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('dataTable').filter()" />
    </p:calendar>
    <p:calendar id="to" pattern="dd.MM.yyyy">
      <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '-' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('dataTable').filter()" />
    </p:calendar>
  </f:facet>
  <h:outputText value="#{bean.date}">
    <f:convertDateTime type="date" dateStyle="medium" />
  </h:outputText>
</p:column>

过滤豆：

@Named
@ApplicationScoped
public class DateRangeFilter implements Serializable {

    private static final Logger LOG = Logger.getLogger(DateRangeFilter.class.getName());

    public boolean filterByDate(Object value, Object filter, Locale locale) {

        String filterText = (filter == null) ? null : filter.toString().trim();
        if (filterText == null || filterText.isEmpty()) {
            return true;
        }
        if (value == null) {
            return false;
        }

        DateFormat df = SimpleDateFormat.getDateInstance(SimpleDateFormat.MEDIUM);

        Date filterDate = (Date) value;
        Date dateFrom;
        Date dateTo;
        try {
            String fromPart = filterText.substring(0, filterText.indexOf("-"));
            String toPart = filterText.substring(filterText.indexOf("-") + 1);
            dateFrom = fromPart.isEmpty() ? null : df.parse(fromPart);
            dateTo = toPart.isEmpty() ? null : df.parse(toPart);
        } catch (ParseException pe) {
            LOG.log(Level.SEVERE, "unable to parse date: " + filterText, pe);
            return false;
        }

        return (dateFrom == null || filterDate.after(dateFrom)) && (dateTo == null || filterDate.before(dateTo));
    }
}

Answer 3

遇到同样的问题，但在我的情况下，它是过滤器构面中的按钮，用于显示带有范围滑块的覆盖面板。

要解决它，请使用标题构面：

    <f:facet name="filter">
         <!-- to hide default filter input -->
         <h:inputHidden />
    </f:facet>
    <f:facet name="header">
         <p:outputLabel value="birthday" /><br />
         <p:calendar id="from" value="#{testDateRange.dateFrom}"   styleClass="customCalendar" pattern="dd/MM/yyyy">
             <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" />
         </p:calendar>
         <p:calendar id="to" value="#{testDateRange.dateTo}" styleClass="customCalendar" pattern="dd/MM/yyyy">
             <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" />
         </p:calendar>
     </f:facet>

p：ajax components中也不需要更新属性。

Answer 4

这只是@ Stephan的答案的Java 8实现，使用java.time类而不是Date。

除日期模式外，JSF部分几乎完全相同。

<p:column headerText="Date" filterBy="#{passbook.createdAt}" filterFunction="#{applicationController.filterByDate}">
<f:facet name="filter">
    <h:inputHidden id="filter" />
</f:facet>
<f:facet name="header">
    <h:outputText value="Date" />
    <br />
    <p:calendar id="from" pattern="dd-MMM-yyyy" size="12">
        <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '>' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('passbookTable').filter()" />
    </p:calendar>
    <h:outputText class="fa fa-arrows-h fa-2x" style="vertical-align: top;"/>
    <p:calendar id="to" pattern="dd-MMM-yyyy" size="12">
        <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '>' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('passbookTable').filter()" />
    </p:calendar>
</f:facet>
<h:outputText value="#{passbook.createdAt}">
    <f:convertDateTime type="date" dateStyle="medium" pattern="dd-MMM-yyyy"/>
</h:outputText>

豆：

@Named
@ApplicationScoped
public class ApplicationController implements Serializable {
    private static final Logger logger = LogManager.getLogger(ApplicationController.class.getName());

public boolean filterByDate(Object value, Object filter, Locale locale) {
        String filterText = (filter == null) ? null : filter.toString().trim();
        if (filterText == null || filterText.isEmpty()) {
            return true;
        }
        if (value == null) {
            return false;
        }

        DateTimeFormatter sdf = DateTimeFormatter.ofPattern("dd-MMM-yyyy");
        Instant instant = ((Date) value).toInstant(); //Zone : UTC+0

        LocalDate dateValue = instant.atZone(ZoneId.of("Asia/Kolkata")).toLocalDate();
        LocalDate dateFrom;
        LocalDate dateTo;
        try {
            String fromPart = filterText.substring(0, filterText.indexOf(">"));
            String toPart = filterText.substring(filterText.indexOf(">") + 1);
            dateFrom = fromPart.isEmpty() ? null : LocalDate.parse(fromPart, sdf);
            dateTo = toPart.isEmpty() ? null : LocalDate.parse(toPart, sdf);
        } catch (Exception e) {
            logger.error("unable to parse date: " + filterText, e);
            return false;
        }

        return (dateFrom == null || dateValue.isAfter(dateFrom) || dateValue.isEqual(dateFrom))
                && (dateTo == null || dateValue.isBefore(dateTo) || dateValue.isEqual(dateTo));
    }

Primefaces数据表日期范围过滤器与filterFunction

4 个答案: