java - Jsf动态添加/删除c中的组件:forEach loop

Question

在我的项目中，单击复选框并添加更多按钮时，我尝试添加一行，然后单击删除按钮，删除确切的行。

有时我在 Controller 方法中得到错误的参数值。所以整个组件生成逻辑无法正常工作。

Index.xhtml

<h:form>
    <h:panelGroup id="shipmentTermsBox">
        <c:forEach items="#{postOffer.shipmentTerms}" var="shipment" varStatus="shipmentCount">
            OuterIndex : #{shipmentCount.index}
            <h:selectBooleanCheckbox value="#{shipment.status}">
                <f:ajax event="change" listener="#{postOffer.addShipmentTermsRow(shipmentCount.index)}" render="shipmentTermsBox" />
            </h:selectBooleanCheckbox>
            <label for="stayin">#{shipment.name} </label>
            <br/>
            <table border="1">
                <c:forEach items="#{shipment.shipmentRowList}" var="shipmentRow" varStatus="shipmentRowCount">
                    <tr>
                        <td>
                            InnerIndex : #{shipmentRowCount.index}
                        </td>
                        <td>
                            #{shipmentRow.priceChoice}
                            <h:selectOneMenu value="#{shipmentRow.priceChoice}">
                                <f:selectItem itemValue="Above Price" itemLabel="Above Price"/>
                                <f:selectItem itemValue="+ (more)" itemLabel="+ (more)"/>
                                <f:selectItem itemValue="- (more)" itemLabel="- (more)"/>
                                <f:ajax event="change" listener="#{postOffer.processPriceDiffChoice(shipmentCount.index,shipmentRowCount.index)}" render="shipmentTermsBox"/>
                            </h:selectOneMenu>
                        </td>
                        <td>
                            #{shipmentRow.priceEnable}
                            <h:panelGroup rendered="#{shipmentRow.priceEnable}">
                                <h:inputText value="#{shipmentRow.price}">
                                    <f:ajax/>
                                </h:inputText>
                            </h:panelGroup>
                        </td>
                        <td>
                            <h:commandButton value="Remove">
                                <f:ajax event="action" listener="#{postOffer.removeShipmentTermsRow(shipmentCount.index,shipmentRowCount.index)}" render="shipmentTermsBox"/>
                            </h:commandButton>
                        </td>
                    </tr>
                </c:forEach>
            </table>
            <h:panelGroup rendered="#{shipment.status}">
                <h:commandButton value="Add More">
                    <f:ajax event="action" listener="#{postOffer.addShipmentTermsRow(shipmentCount.index)}" render="shipmentTermsBox"/>
                </h:commandButton>
                <br/><br/>
            </h:panelGroup>
        </c:forEach>
    </h:panelGroup>
</h:form>

PostOffer.java

@ManagedBean
@ViewScoped
public class PostOffer implements Serializable {
    private List<ShipmentProxy> shipmentTerms = new ArrayList<ShipmentProxy>();

    public PostOffer() {}

    @PostConstruct
    public void init() {
        shipmentTerms.add(new ShipmentProxy(1l, "FAS"));
        shipmentTerms.add(new ShipmentProxy(2l, "CFR"));
    }

    public void processPriceDiffChoice(int shipmentIndex, int rowIndex) {
        ShipmentRow row = shipmentTerms.get(shipmentIndex).getShipmentRowList().get(rowIndex);
        if (row.getPriceChoice().equals("Above Price")) {
            row.setPriceEnable(false);
        } else {
            row.setPriceEnable(true);
        }
    }

    public void addShipmentTermsRow(int shipmentIndex) {
        ShipmentProxy proxy = shipmentTerms.get(shipmentIndex);
        if (proxy.isStatus()) {
            proxy.getShipmentRowList().add(new ShipmentRow());
        } else {
            proxy.getShipmentRowList().clear();
        }
    }

    public void removeShipmentTermsRow(int shipmentIndex, int rowIndex) {
        shipmentTerms.get(shipmentIndex).getShipmentRowList().remove(rowIndex);
    }
    //getters and setters
}

ShipmentProxy.java

public class ShipmentProxy {
    private Long id;
    private boolean status;
    private String name;
    private List<ShipmentRow> shipmentRowList = new ArrayList<ShipmentRow>();

    public ShipmentProxy(Long id, String name) {
        this.id = id;
        this.name = name;
    }
    //getters and setters
}

ShipmentRow.java

public class ShipmentRow {
    private String priceChoice = "Above Price";
    private String price = "0";
    private boolean priceEnable = false;
    //getters and setters
}

输出:

我做错了什么？我的代码中是否存在任何逻辑错误？

Answer 1

我的代码中没有逻辑错误。这只是旧版本中的 JSF 错误。

根据 BalusC 的评论，我已按照以下步骤操作:

1. 我已升级 JBoss AS 7.1 中的 Mojarra(jsf-api-2.2.9.jar、jsf-impl-2.2.10.jar)。请参阅this
2. 我将 JSF 页面中的 c:forEach 循环更改为 ui:repeat 和 h:dataTable。
3. 在方法参数中直接传递 var 而不是 index。

现在，新更改的代码看起来像这样:

Index.xhtml

<h:form id="form">
    <h:panelGroup id="shipmentTermsBox">
        <ui:repeat value="#{postOffer.shipmentTerms}" var="shipment">
            <h:selectBooleanCheckbox value="#{shipment.status}">
                <f:ajax event="change" listener="#{postOffer.addShipmentTermsRow(shipment)}" render=":form:shipmentTermsBox" />
            </h:selectBooleanCheckbox>
            <label for="stayin">#{shipment.name} </label> <br/>
            <h:dataTable var="shipmentRow" value="#{shipment.shipmentRowList}">
                <h:column>
                    <h:selectOneMenu value="#{shipmentRow.priceChoice}">
                        <f:selectItem itemValue="Above Price" itemLabel="Above Price"/>
                        <f:selectItem itemValue="+ (more)" itemLabel="+ (more)"/>
                        <f:selectItem itemValue="- (more)" itemLabel="- (more)"/>                                                                   
                        <f:ajax event="change" listener="#{postOffer.processPriceDiffChoice(shipmentRow)}" render=":form:shipmentTermsBox"/>
                    </h:selectOneMenu>
                </h:column>
                <h:column>
                    <h:panelGroup rendered="#{shipmentRow.priceEnable}">
                        <h:inputText value="#{shipmentRow.price}">
                            <f:ajax/>
                        </h:inputText>
                    </h:panelGroup>
                </h:column>
                <h:column>
                    <h:commandButton value="Remove">
                        <f:ajax event="action" listener="#{postOffer.removeShipmentTermsRow(shipment,shipmentRow)}" render=":form:shipmentTermsBox"/>
                    </h:commandButton>
                </h:column>
            </h:dataTable>
            <h:panelGroup rendered="#{shipment.status}">
                <h:commandButton value="Add More">
                    <f:ajax event="action" listener="#{postOffer.addShipmentTermsRow(shipment)}" render=":form:shipmentTermsBox"/>
                </h:commandButton>
                <br/><br/>
            </h:panelGroup>
        </ui:repeat>
    </h:panelGroup>
</h:form>

PostOffer.java

public void processPriceDiffChoice(ShipmentRow row) {
    if (row.getPriceChoice().equals("Above Price")) {
        row.setPriceEnable(false);
    } else {
        row.setPriceEnable(true);
    }
}

public void addShipmentTermsRow(ShipmentProxy proxy) {
    if (proxy.isStatus()) {
        proxy.getShipmentRowList().add(new ShipmentRow());
    } else {
        proxy.getShipmentRowList().clear();
    }
}

public void removeShipmentTermsRow(ShipmentProxy proxy,ShipmentRow row) {
    proxy.getShipmentRowList().remove(row);
}

注意:其余代码与问题中提到的完全相同。