Question

我希望列表中的每个记录/行的表格单元格中都有一个下拉列表

customerList保存Connection实体（具有customerGroup和assignedVendor属性）

vendorList保存供应商实体（具有name和customerID属性

这是我到目前为止所做的：

<form:form action="${pageContext.request.contextPath}/vendorAdmin/viewClients/${vendorGroupID}" method="post" >

                            <table class="table table-striped table-bordered table-hover " id="sample_1">
                                <thead>
                                <tr class="bg-success">

                                    <th>Admin Name</th>
                                    <th>Email</th>
                                    <th>Username</th>
                                    <th>Phone</th>
                                    <th>Assign To</th>
                                    <th></th>

                                </tr>
                                </thead>
                                <c:forEach items="${customerList}" var="connection" varStatus="cStatus">
                                    <tr>
                                        <td>${customerList[cStatus.index].customerGroup.name}</td>

                                        <td class="text-center">${customerList[cStatus.index].customerGroup.customerList[0].email}</td>
                                        <td class="text-center">${customerList[cStatus.index].customerGroup.customerList[0].username}</td>
                                        <td class="text-center">${customerList[cStatus.index].customerGroup.customerList[0].phone}</td>
                                        <td>

                                            <form:select path="customerList[${cStatus.index}].assignedVendor.customerID">
                                                <form:options items="${vendorList}" itemLabel="name" itemValue="customerID"/>
                                            </form:select>

                                        </td>
                                        <td>
                                            <a href="<spring:url value="/vendorAdmin/sendMessageToCustomer/${vendorGroupID}/${customerList[cStatus.index].customerGroup.userGroupID}" />"
                                            ><span class="glyphicon glyphicon-message "></span></a>

                                        </td>
                                    </tr>
                                </c:forEach>
                            </table>
                        </form:form>

错误：

 ERROR o.s.web.servlet.tags.form.SelectTag - Neither BindingResult nor plain target object for bean name 'command' available as request attribute
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'command' available as request attribute
    at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:154)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:141)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:132)
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:116)
    at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422)
    at org.springframework.web.servlet.tags.form.SelectTag.writeTagContent(SelectTag.java:194)
    at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
    at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)

有人可以指出我哪里出错吗？

编辑：我为不够清楚而道歉。问题不在于我无法从控制器获取customerList。一切正常，除了form:select感觉就像我在path犯了一个错误，无法访问该字段。希望这能让它更清晰

Answer 1

Spring tablib需要一个命令名或模型属性，它可以绑定输入值。

让我们说你有这样的课 -

User{
    private String name;
    //Add getters setters
}

来自加载页面的控制器

@RequestMapping("/form")
public String getFormPage(Model model){
   model.addAttribute("user",new User());
}

然后在form.jsp

中

<form:form modelAttribute="user">/*user is set in model attribute in controller*/
    <form:input path="name" placeholder="Input name">
</form:form>

JSTL表单：在c：forEach中的表格单元格中选择

1 个答案: