如何传递一个Map<ObjectA，List<ObjectB>>在 Struts 2 中执行

2022-01-13 00:00:00 type-conversion java jsp struts2 ognl

我有一个事件对象，里面有一个Map>，ObjectA是标签，list<;ObjectB> 是表格行.使用以下代码，我可以正确显示表格，但是当我将表单提交到 Action 类时，地图在事件中是 null.

I have a event object, inside there is a Map<ObjectA, List<ObjectB>>, the ObjectA is the label, and the list<ObjectB> are table rows. With following code, I can display the tables correctly, but when I submit the form to Action class, the map is null inside the event.

JSP 代码:

<s:iterator value="event.planMap" var="map" >
    <h4>Plan Type: <s:property value='key' /></h4>
    <table id="plan">
    <s:iterator value="value" status="stat" var="detail" >
        <tr>
            <td><input type="text" id="name" name="event.planMap['%{#map.key}'][%{#stat.index}].name" value="<s:property value='name'/>"/></td>
            <td><input type="text" id="text" name="event.planMap['%{#map.key}'][%{#stat.index}].text" value="<s:property value='text'/>"/></td>
            <td><input type="text" id="contact" name="event.planMap['%{#map.key}'][%{#stat.index}].contact" value="<s:property value='contact'/>"/></td>
        </tr>
        </s:iterator>
    </table>
</s:iterator>

@Andrea &Roman，所以我修改了代码.显示表格是正确的，但我得到了错误，它进入了结果输入.如果我删除 planMap，则操作会成功.所以至少我知道错误是 planMap.修改后的代码是:

@Andrea & Roman, So I modified the code. displaying the table is correct, but I got error and it went to Result input. If I remove the planMap, the action goes to success. So at least I know the error are the planMap. The modified code is:

事件定义:

The Event definition:

public Event {
    private Map<Object_A, Object_B> planMap;
    public Map<Object_A, Object_B> getPlanMap {
           return this.planMap;
    }

    public void setPlanMap(Map<Object_A, Object_B> planMap) {
           this.planMap = planMap;
    }
}

Object_B 定义:

The Object_B definition:

public Object_B {
    private List<Object_C> details;
    
    public List<Object_C> getDetials() {
           return this.details;
    }
    public void setDetails(List<Object_C> details) {
           this.details = details;
    }
}

JSP代码为:

<s:iterator value="event.planMap" status="mStat"  >
    <h4>Plan Type: <s:property value='key' /></h4>
    <table id="plan">
    <s:iterator value="value.details" status="stat">
    <tr>
        <td><input type="text" id="name" name="event.planMap['% {#mStat.index}'].details[%{#stat.index}].name" value="<s:property value='name'/>"/></td>
        <td><input type="text" id="text" name="event.planMap['%{#mStat.index}'].details[%{#stat.index}].text" value="<s:property value='text'/>"/></td>
        <td><input type="text" id="contact" name="event.planMap['%{#mStat.index}'].details[%{#stat.index}].contact" value="<s:property value='contact'/>"/></td>
    </tr>
    </s:iterator>
</table>
</s:iterator>

推荐答案

我在以下更改后使其工作.

I made it work after the following change. 

<s:iterator value="event.planMap" status="mStat"  >
<h4>Plan Type: <s:property value='key' /></h4>
<table id="plan">
<s:iterator value="value.details" status="stat">
<tr>
    <td><s:textfield id="name" name="event.planMap['%{key}'].details[%{#stat.index}].name" /></td>
    <td><s:textfield  id="text" name="event.planMap['%{key}'].details[%{#stat.index}].text" /></td>
    <td><s:textfield id="contact" name="event.planMap['%{key}].details[%{#stat.index}].contact" /></td>
</tr>
</s:iterator>

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