如何在我的操作中从 JSP 获取更新的列表值? [英] How to get updated list values from JSP in my action?

问题描述

我有一个 JSP，我在其中迭代一个列表并创建一个可编辑的表.

I have a JSP in which I am iterating over a list and creating an editable table.

<s:iterator value="test" id="countryList">
  <tr>
    <td><s:textfield name="countryCode" value="%{countryCode}" theme="simple" /></td>
    <td><s:textfield name="countryName" value="%{countryName}" theme="simple" /></td>
  </tr>
 </s:iterator>

我的清单:

List<Country> test = new ArrayList<Country>();  

乡村类:

public class Country {
    private String countryCode;
    private String countryName;


and the getter setters......

然后说我像这样填充列表:

Country country = new Country();
Country country1 = new Country();

country.setCountryCode("1");
country.setCountryName("India");

country1.setCountryCode("2");
country1.setCountryName("US");

test.add(country);
test.add(country1);

现在，当我在 JSP 中更改 countrycode 和 countryname 的值时，我应该在我的操作中获得更新的值.但我不能.有什么方法可以获取这些更新后的值.

Now when I change the values of countrycode and countryname in the JSP, I should get the updated values in my action. But am I not able to. Is there any way to get these updated values.

推荐答案

当 params 拦截器使用索引属性访问填充您的列表时，您需要创建 Country 对象.

You need the Country object is created when the params interceptor is populating your list using indexed property access.

<s:iterator value="test" id="countryList" status="stat">
  <tr>
    <td><s:textfield name="countryList[%{#stat.index}].countryCode" value="%{countryCode}" theme="simple" /></td>
    <td><s:textfield name="countryList[%{#stat.index}].countryName" value="%{countryName}" theme="simple" /></td>
  </tr>
 </s:iterator>

要让 struts 填充列表，您应该在 xml 配置中使用类型转换注释或等效注释.

To let the struts populate the list you should use a type conversion annotation or equivalent in the xml configuration.

@Element(value = Country.class)
@Key(value = String.class)
@KeyProperty(value = "countryCode") 
@CreateIfNull(value = true)
private List<Country> countryList = new ArrayList<Country>;

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