Question

我是struts 2的新手。我在使用list属性填充Select标签时遇到问题。这些值是从动作类提供的。请为此方案提供示例代码。

我的动作类

public class TripDetailsAdd extends ActionSupport {

    @Override
    public String execute() throws Exception {
        return SUCCESS;
    }

    public String populate() {
        VehicleDAO vehicleDAO = new VehicleDAO();
        this.lstVehicles.addAll(vehicleDAO.getAllVehicles());
        return "populate";
    }   

    private String vehicleId;   
    private Collection lstVehicles = new ArrayList<VehiclesVO>();
}

Jsp页面内容：

<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="sform" uri="/struts-dojo-tags"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<%@page import="com.vms.business.dao.VehicleDAO"%>
<%@page import="java.util.Collection"%><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Trip Details</title>
</head>
<body>
<s:form action="tripDetailsAdd" method="POST" >
    <s:hidden name="expenseTypeId"></s:hidden>
    <table width="100%" height="96%" cellpadding="0" cellspacing="0">
        <tr>
            <td valign="top"><!-- Menu Starts  --> <jsp:include
                page="/pages/menu.jsp"></jsp:include> <!-- Menu End  -->
            <table width="95%" align="center">
                <tr>
                    <td>
                    <table width="100%" border="0" cellpadding="0" cellspacing="0">

                        <tr>
                            <td class="highlight">Trip Details Add</td>
                            <td><s:actionerror /><s:actionmessage /></td>
                        </tr>
                        <tr>
                            <td class="header3shadow" colspan="2"><img height="2"
                                border="0" width="100%"></img></td>
                        </tr>
                    </table>
                    <table>
                        <tr>
                            <td>&nbsp;</td>
                        </tr>
                    </table>
                    <div
                        style="overflow: auto; height: expression((document.body.clientHeight -80) +px ');">
                    <table width="60%" cellspacing="0" cellpadding="0" border='0'>
                        <tr>
                            <td class="FieldTitle" valign="top">
                            <table width="100%" cellspacing="4" cellpadding="0" border='0'>
                            <s:select headerKey="0" headerValue="Select One" required="*" label="Vehicle No."
                             labelSeparator=":"   list="lstVehicles" listKey="vehicleId" listValue="regNo"></s:select>

                            </td>
                        </tr>
                        <tr>
                            <td>
                            <table width="100%" cellspacing="4" cellpadding="0" border='0'>
                                <s:textfield labelposition="left" requiredposition="right"
                                    name="totalIncome" label="Total Income" cssStyle="FieldTitle"
                                    labelSeparator=":"></s:textfield>
                            </table>
                            </td>
                        </tr>
                    </table>

                    <table cellpadding="0" width="60%" cellspacing="0" border="0">
                        <tr>
                            <td align="right"><s:submit label="Add" value="Add"></s:submit></td>
                        </tr>
                    </table>
                    </div>

                    <table border="0" cellspacing="0" cellpadding="0">
                        <tr>
                            <td>&nbsp;</td>

                        </tr>
                    </table>
                    </td>
                </tr>
            </table>
            </td>
        </tr>
    </table>
</s:form>
</body>
</html>

映射

<action name="*TripDetailsAdd" method="{1}"
            class="com.vms.trip.presentation.TripDetailsAdd">
            <result name="success" type="redirect">showTripDetailsList
            </result>
            <result name="populate">/pages/tripdetails/TripDetailsAdd.jsp
            </result>
            <result name="error">/pages/tripdetails/TripDetailsAdd.jsp
            </result>
            <result name="input">/pages/tripdetails/TripDetailsAdd.jsp
            </result>
        </action>

在此，如果我添加验证文件或如果页面下拉中发生任何错误未加载。请帮助我..

Answer 1

Struts2 select tag

<s:select label="Pets"
       name="petIds"
       list="petDao.pets"
       listKey="id"
       listValue="name"
       value="%{petDao.pets.{id}}"
/>

在上面。 value =默认选择，list =来自您的动作类的集合（Map），listKey =地图的键，listValue =地图的值。

编辑（查看提供的代码后）：

你的问题是你没有任何与lstVehicles对应的动作类getter（在select标签的list属性中提到）

将此添加到您的操作类：

public List getLstVehicles ()
{
    return this.lstVehicles;
}

Struts 2选择由list属性填充的标记

1 个答案: