Question

我的jsp中有Struts2 select标签：

<s:iterator value="data.members" status="rowstatus">
    <s:select id="Ct%{#rowstatus.index}" name="data.members[%{#rowstatus.index}].extData.carrierKey" headerKey="-1" headerValue="" list="carrier"
              onchange="javascript:autoTab(event,this,%{#rowstatus.index},false);">                                         
    </s:select>
</s:iterator

现在这个carrier是后端的Map，它将填充在这个select标签中。载体填充如下：

carrier = new HashMap<Integer, String>();
carrier.put(1,"LIC");
carrier.put(2, "Bajaj");

现在假设显示jsp。我在select标签中选择LIC并提交表格。假设发生了一些验证错误。我调试了应用程序，发现动作类中变量"data.members[%{#rowstatus.index}].extData.carrierKey"的值为1.但是它的值没有填充在jsp上。

我不明白，如果data.members[%{#rowstatus.index}].extData.carrierKey设置为值，为什么值不会填充。据我说，如果它的值是1，那么select标签必须显示LIC。

Answer 1

我试用你的代码并且对我很好。

JSP：

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head><title>Stack Overflow</title></head>
<body>
    <h1>Stack Overflow</h1>

    <s:form action="stackoverflow"  method="POST">
        <s:iterator value="data.members" status="rowstatus">

           <s:select    id="Ct%{#rowstatus.index}"
                    name="data.members[%{#rowstatus.index}].extData.carrierKey" 
                    headerKey="-1" 
                    headerValue="" 
                    list="carrier"
                    onchange="javascript:autoTab(event,this,%{#rowstatus.index},false);"
                    >                                         
            </s:select>

        </s:iterator>
        <br/>
        <s:submit value="Submit!" method="save" />
    </s:form>

    <script type="text/javascript">
        function autoTab(ev, current,nextElementIndex, varBool){
            document.getElementById("stackoverflow").elements[nextElementIndex].focus();
        };
    </script>
</body>
</html>

动作：

package com.tutorialspoint.struts2.actions;

import java.util.HashMap;
import java.util.Map;
import com.opensymphony.xwork2.ActionSupport;
import com.tutorialspoint.struts2.entities.ObjectData;
import com.tutorialspoint.struts2.entities.ObjectMember;

public class StackOverflowAction extends ActionSupport {

    private static final long serialVersionUID = 9053634696133432054L;

    private Map<Integer, String> carrier;
    private ObjectData data;

    public String execute() throws Exception {
        return MyAction.SUCCESS;
    }

    public String save()  throws Exception {
        return MyAction.SUCCESS;
    }

    public Map<Integer, String> getCarrier() {
        if(this.carrier == null) {
            this.carrier = new HashMap<Integer, String>();
            this.carrier.put(1,"LIC");
            this.carrier.put(2, "Bajaj");
        }
        return carrier;
    }

    public ObjectData getData() {
        if(this.data == null) {
            this.data = new ObjectData();
            ObjectMember member1 = new ObjectMember();
            member1.getExtData().setCarrierKey("");
            ObjectMember member2 = new ObjectMember();
            member2.getExtData().setCarrierKey("");
            this.data.getMembers().add(member1);
            this.data.getMembers().add(member2);
        }
        return data;
    }
}

struts.xml中：

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <package name="stackoverflow" extends="struts-default" namespace="/">

        <action name="stackoverflow" class="com.tutorialspoint.struts2.actions.StackOverflowAction" method="execute">
            <result name="success">/jsp/stackoverflow/test.jsp</result>
        </action>

    </package>
</struts>

选择不预先选择值的标签

1 个答案: