如何将数据绑定到弹簧形式列表

Question

我有一个带有背衬物体的弹簧形式.表格是这样的 -

<sf:form cssClass="form-horizontal" commandName="campaignModel" method="post">
<sf:input path="campaign.name" class="form-control" /> 
<sf:input path="landingPageModels.landingPage.url" class="form-control" />
</sf:form>

模型类(表单支持对象) -

CampaignModel.java

public class CampaignModel { 
private Campaign campaign = new CampaignImpl();
private List<LandingPageModel> landingPageModels = new Arraylist<LandingPageModel>;
public Campaign getCampaign() {
    return campaign;
}
public void setCampaign(Campaign campaign) {
    this.campaign = campaign;
}
public List<LandingPageModel> getLandingPageModels() {
    return landingPageModels;
}
public void setLandingPageModels(List<LandingPageModel> landingPageModels) {
    this.landingPageModels = landingPageModels;
}

LandingPageModel.java是 -

public class LandingPageModel {
private LandingPage landingPage = new LandingPageImpl();
private List<LandingPageParameterImpl> landingPageParameters = new ArrayList<LandingPageParameterImpl>();

public LandingPage getLandingPage() {
    return landingPage;
}
public void setLandingPage(LandingPage landingPage) {
    this.landingPage = landingPage;
}
public List<LandingPageParameterImpl> getLandingPageParameters() {
    return landingPageParameters;
}
public void setLandingPageParameters(List<LandingPageParameterImpl> landingPageParameters) {
    this.landingPageParameters = landingPageParameters;
} 
}

LandingPage.java是 -

public class LandingPageImpl extends EntityImpl implements LandingPage {

private String url;

public String getUrl() {
    return url;
}

public void setUrl(String url) {
    this.url = url;
} }

所以我希望我可以在landingPageModels列表中插入许多landingPage对象(拥有自己的url属性).这意味着我可以拥有多个像这样的url属性的输入标签 -

<sf:input path="landingPageModels.landingPage.url" class="form-control" />
<sf:input path="landingPageModels.landingPage.url" class="form-control" />
<sf:input path="landingPageModels.landingPage.url" class="form-control" />

但是在执行这段代码时,spring给出了一个错误,即landingPageModels的landingPage属性没有getter setter方法.如何解决它以及如何采取这样的多重价值？

Answer 1

为了将列表模型属性绑定到多个输入字段，您需要在呈现的表单中使用它：

<input type="text" name="landingPageModels[0].landingPage.url" class="form-control" />
<input type="text" name="landingPageModels[1].landingPage.url" class="form-control" />
<input type="text" name="landingPageModels[2].landingPage.url" class="form-control" />

这是通过以下方式完成的：

<c:forEach items="${campaignModel.landingPageModels}" varStatus="s">
    <sf:input path="landingPageModels[${s.index}].landingPage.url" class="form-control" />
</c:forEach>