Jsf 素数面；can'；无法获取picklist组件的目标列表

使用命令按钮提交表单时，无法获取目标列表值

以下是picklist的源初始化：

public DualListModel<VehicleType> getVehicleTypeList() {

    List<VehicleType> source = new ArrayList<VehicleType>();  
    List<VehicleType> target = new ArrayList<VehicleType>();  

    source = dao.getVehicleTypes(getLocale());     

    vehicleTypeList = new DualListModel<VehicleType>(source, target);
    return vehicleTypeList;
}

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提交此组件后，源值正常，但目标列表为空，即使我在xhtml页面中将数据从源传输到目标列表。如何获取目标列表值

您的问题缺少一些信息，比如支持bean的范围。另外，不要在getter中执行业务逻辑

// should be something like this (did not test it though)
public void onTransfer(final TransferEvent event) {
    for (final Object each : event.getItems()) {
        vehicleTypeList.getTarget().add(((VehicleType) each));
    }
}

public void onTransfer(TransferEvent event) {  
    StringBuilder builder = new StringBuilder();  
    for(VehicleType type : vehicleTypeList.getTarget()) {  
        builder.append(type.getVehicleTypeName() + " ");  
    }  

    FacesMessage msg = new FacesMessage();  
    msg.setSeverity(FacesMessage.SEVERITY_INFO);  
    msg.setSummary("Items Transferred");  
    msg.setDetail(builder.toString());  

    FacesContext.getCurrentInstance().addMessage(null, msg);  
}

// should be something like this (did not test it though)
public void onTransfer(final TransferEvent event) {
    for (final Object each : event.getItems()) {
        vehicleTypeList.getTarget().add(((VehicleType) each));
    }
}