在primefaces数据表过滤器中设置默认值 [英] setting default value in primefaces datatable Filter

问题描述

我使用的是primefaces v3.5，在数据表上我使用的是一列过滤器. 加载页面本身时，如何为过滤器设置默认值.

I am using primefaces v3.5.On the datatable I am using filter on one column. How can I set a default value to the filter while loading the page Itself.

推荐答案

正确的解决方案是使用p:dataTable的filteredValue属性，其中包含过滤后的集合以及p:column的filterValue属性，以显示向用户过滤配置.

The correct solution is to use the filteredValue attribute of p:dataTable which contains the filtered collection together with filterValue attribute of p:column to show the filters configuration to the user.

要将p:dataTable过滤器存储在会话bean中，还必须保留过滤的数据. p:dataTable不会为您执行初始排序.

To keep your p:dataTable filters stored in your session bean, you have to keep also the filtered data. The p:dataTable wouldn't perform the initial sorting for you.

检查此示例JSF:

<p:dataTable 
    value="#{usersBean.employees}" 
    var="e"
    filteredValue="#{userListState.filteredValue}">

    <p:ajax event="filter" listener="#{userListState.onFilterChange}"/>

    <p:column 
        headerText="user" 
        filterBy="#{e.user.id}" 
        filterValue="#{userListState.filterState('user.id')}">
        #{e.user.id}
    </p:column>
</p:dataTable>

以该托管bean为后盾:

Backed with this managed bean:

@Named(value = "userListState")
@SessionScoped
public class UserListState implements Serializable{
    private Map<String, String> filterState = new HashMap<String, String>();
    private List<Employee> filteredValue;

    public UserListState() {
    }

    public void onFilterChange(FilterEvent filterEvent) {
        filterState = filterEvent.getFilters();
        filteredValue =(List<Employee>) filterEvent.getData();
    }

    public String filterState(String column) {
        return filterState.get(column);
    }

    public List<Employee> getFilteredValue() {
        return filteredValue;
    }

    public void setFilteredValue(List<Employee> filteredValue) {
        this.filteredValue = filteredValue;
    }
}

这篇关于在primefaces数据表过滤器中设置默认值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！