使用Spring的form标签动态绑定列表 [英] Dynamically binding lists with Spring's form tag
问题描述
我有一个命令对象FaxForm
,它在faxStatusList
属性内保存了一个FaxStatus
对象的列表.
I have a command object FaxForm
and it holds a list of FaxStatus
objects inside a faxStatusList
property.
public class FaxForm {
private List<FaxStatus> faxStatusList;
public void setFaxStatusList(List<FaxStatus> faxStatusList) {
this.faxStatusList = faxStatusList;
}
public List<FaxStatus> getFaxStatusList() {
return faxStatusList;
}
}
最初,我有一个JSP页面,该页面将通过执行以下操作来绑定对象:
I initially had a JSP page that would bind the objects by performing the following:
<c:forEach items="${esaFaxForm.faxStatusList}" var="item" varStatus="loop">
<tr class="tableAltBackground">
<td>
<form:checkbox path="faxStatusList[${loop.index}].selected"/>
</td>
<td>
<form:select path="faxStatusList[${loop.index}].status" items="${esaFaxForm.statusOptions}" onchange="checkThisBox(this);"/>
</td>
<td>
<a href="${statusContUrl}?id=${item.id}&status=${item.status}" onclick="openFaxWindow('${viewFaxUrl}?id=${item.id}', ${loop.index});">${item.name}</a>
<form:hidden path="faxStatusList[${loop.index}].name"/>
</td>
<td>
<a href="${statusContUrl}?id=${item.id}&status=${item.status}" onclick="openFaxWindow('${viewFaxUrl}?id=${item.id}', ${loop.index});">${item.id}</a>
<form:hidden path="faxStatusList[${loop.index}].id"/>
</td>
</tr>
</c:forEach>
但是,我试图弄清楚如何在没有forEach循环和索引的情况下进行绑定. Spring 网站上的示例通过设置列表名称的路径.有没有办法绑定属性?我已经尝试过了,但是失败了:
However, I am trying to figure out how I could do the binding without the forEach loop and index. The examples on the Spring website show the binding by setting the path to the list name. Is there a way to bind the properties? I've tried this but it fails:
<form:checkbox path="faxStatusList.faxStatus.selected"/>
<form:select path="faxStatusList.faxStatus.status" items="${esaFaxForm.statusOptions}"/>
FaxStatusList具有getter和setter方法,而FaxStatus变量均具有getter/setter属性.我收到错误"Bean类的无效属性'faxStatusList.faxStatus'..."
The faxStatusList has a getter and setter method and the FaxStatus variables each have getter/setter properties. I get the error "Invalid property 'faxStatusList.faxStatus' of bean class..."
推荐答案
Spring表单标签具有复选框标签.您可以按以下方式使用它来自动进行绑定:
Spring form tags has a checkboxes tag. You can use it as follows to do the binding automatically:
<form:checkboxes items="${faxStatusList}" path="faxStatusList" itemLabel="name" itemValue="id" delimiter="<br/>" onclick="yourOnClickMethodIfYouNeed(this);"/>
上面的代码片段将显示一个以br标签分隔的复选框项目列表.对复选框状态所做的任何更改都将适当地反映在您的FaxForm中. FaxStatusList对象.
The above snippet will display a list of checkbox items delimited with the br tag. Any changes made to the state of the checkboxes will be reflected appropriately in your FaxForm. faxStatusList object.
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