Question

我正在研究这个用于显示数据的JSF表。

enter image description here

当我点击编辑按钮时，可以编辑进入JSF页面的行。

enter image description here

这是代码：

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      >
    <h:head>
        <h:outputStylesheet library="css" name="table-style.css"  />
    </h:head>
    <h:body>

        <h:form>
            <h:dataTable value="#{order.orderList}" var="o"
                styleClass="order-table"
                headerClass="order-table-header"
                rowClasses="order-table-odd-row,order-table-even-row"
            >
                        <h:column>

                    <f:facet name="header">Select</f:facet>

                    <h:selectBooleanCheckbox value="#{order.selectedIds[dataItem.id]}" />

                </h:column>
                <h:column>

                    <f:facet name="header">Order No</f:facet>

                    <h:inputText value="#{o.orderNo}" size="10" rendered="#{o.editable}" />

                    <h:outputText value="#{o.orderNo}" rendered="#{not o.editable}" />

                </h:column>

                <h:column>

                    <f:facet name="header">Product Name</f:facet>

                    <h:inputText value="#{o.productName}" size="20" rendered="#{o.editable}" />

                    <h:outputText value="#{o.productName}" rendered="#{not o.editable}" />

                </h:column>

                <h:column>

                    <f:facet name="header">Price</f:facet>

                    <h:inputText value="#{o.price}" size="10" rendered="#{o.editable}" />

                    <h:outputText value="#{o.price}" rendered="#{not o.editable}" />

                </h:column>

                <h:column>

                    <f:facet name="header">Quantity</f:facet>

                    <h:inputText value="#{o.qty}" size="5" rendered="#{o.editable}" />

                    <h:outputText value="#{o.qty}" rendered="#{not o.editable}" />

                </h:column>

                <h:column>

                    <f:facet name="header">Action</f:facet>

                    <h:commandLink value="Edit" action="#{order.editAction(o)}" rendered="#{not o.editable}" />

                </h:column>

            </h:dataTable>

            <h:commandButton value="Save Changes" action="#{order.saveAction}" />
                <h:commandButton value="Delete" action="#{order.getSelectedItems}" />

        </h:form>
    </h:body>

</html>


import java.io.Serializable;
import java.math.BigDecimal;
import java.util.Arrays;

import java.util.HashMap;
import java.util.Map;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name="order")
@SessionScoped
public class OrderBean implements Serializable{

        private Map<Long, Boolean> selectedIds = new HashMap<Long, Boolean>();
        private List<OrderBean> selectedDataList;
        Iterable<OrderBean> dataList = null;

        public String getSelectedItems() {

            // Get selected items.
            selectedDataList = new ArrayList<OrderBean>();

            for (OrderBean dataItem : dataList) {
                if (selectedIds.get(dataItem.getId()).booleanValue()) {
                    selectedDataList.add(dataItem);
                    selectedIds.remove(dataItem.getId()); // Reset.
                    /* Insert into DB SQL stetement which deletes rows by using 
                       dataItem as key */
                }
            }

            return "selected"; // Navigation case.
        }

        public Map<Long, Boolean> getSelectedIds() {
            return selectedIds;
        }

        public List<OrderBean> getSelectedDataList() {
            return selectedDataList;
        }


        /* Create list with data */


    private static final long serialVersionUID = 1L;

    private static final ArrayList<Order> orderList = 
        new ArrayList<Order>(Arrays.asList(

        new Order("A0001", "Intel CPU", 
                new BigDecimal("700.00"), 1),
        new Order("A0002", "Harddisk 10TB", 
                new BigDecimal("500.00"), 2),
        new Order("A0003", "Dell Laptop", 
                new BigDecimal("11600.00"), 8),
        new Order("A0004", "Samsung LCD", 
                new BigDecimal("5200.00"), 3),
        new Order("A0005", "A4Tech Mouse", 
                new BigDecimal("100.00"), 10)
    ));

    public ArrayList<Order> getOrderList() {

        return orderList;

    }

    public String saveAction() {

        //get all existing value but set "editable" to false 
        for (Order order : orderList){
            order.setEditable(false);
        }

        //return to current page
        return null;

    }

    public String editAction(Order order) {

        order.setEditable(true);
        return null;
    }

    private Object getId() {
        throw new UnsupportedOperationException("Not yet implemented");
    }

    public static class Order{

        String orderNo;
        String productName;
        BigDecimal price;
        int qty;
        boolean editable;

        public Order(String orderNo, String productName, BigDecimal price, int qty) {
            this.orderNo = orderNo;
            this.productName = productName;
            this.price = price;
            this.qty = qty;
        }

        public boolean isEditable() {
            return editable;
        }
        public void setEditable(boolean editable) {
            this.editable = editable;
        }
        public String getOrderNo() {
            return orderNo;
        }
        public void setOrderNo(String orderNo) {
            this.orderNo = orderNo;
        }
        public String getProductName() {
            return productName;
        }
        public void setProductName(String productName) {
            this.productName = productName;
        }
        public BigDecimal getPrice() {
            return price;
        }
        public void setPrice(BigDecimal price) {
            this.price = price;
        }
        public int getQty() {
            return qty;
        }
        public void setQty(int qty) {
            this.qty = qty;
        }
    }
}

我想添加在按下编辑按钮后显示的取消按钮。现在，如果我想取消编辑表格，我必须重新加载页面。我怎么能添加这个按钮？

Answer 1

只需使用按钮刷新页面即可。确保它是一个触发GET请求的按钮，例如h:button。如果o.editable为真，则让按钮呈现。

或者，如果您不想要完全刷新，请使用ajaxified h:commandButton并重新渲染可编辑的行。

<h:commandButton value="Cancel" action="#{bean.cancelAction(o)}">
  <f:ajax execute="@this" render="ids of your row components">
<h:commandButton>

在给定的代码中，您没有outputText和inputText组件的id属性。您需要添加它们才能使用ajax。

Answer 2

如果您想要取消编辑模式，您只需再次刷新页面即可。我认为无需添加其他操作方法。

            <f:facet name="header">Action</f:facet>

            <h:commandLink value="Edit" process="@form" update="@form" rendered="rendering option" />

        </h:column>

如何在JSF表中添加清除按钮？

2 个答案: