从 Struts2 表单提交中填充集合

2022-01-16 00:00:00 java struts2 struts

我正在尝试从表单中填充 bean 列表:

I'm trying to populate a List of beans from a form:

public class Foo {
   public String attr1;
   public String attr2;
}

public class Bar {
   public List<Foo> foos;
}

public class StrutsAction extends Action {
   public Bar bar;
}

那么在我的 Struts2 表单中，填充 Foo 的最佳方式是什么?直觉上，我想做:

So in my Struts2 form, what's the best way to populate Foo? Intuitively, I want to do:

<input type="hidden" name="bar.foos.attr1" />

但这不起作用并且会导致冲突.我确定答案很简单，我忽略了它.

but that isn't working and would cause collisions. I'm sure the answer is very simple and I'm overlooking it.

推荐答案

如果我理解正确，您只是希望每个隐藏字段的名称不同?

If I understand it correctly, you just want different name for each hidden field?

<s:iterator value="bars" status="key">
    <s:hidden name="bar.foos[%{#key.index}].attr1" value="attr1" />
    <s:hidden name="bar.foos[%{#key.index}].attr2" value="attr2" />
</s:iterator>

这应该给你相当于

<input type="hidden" name="bar.foos[0].attr1" value="some value" />
<input type="hidden" name="bar.foos[0].attr2" value="some other value" />
<input type="hidden" name="bar.foos[1].attr1" value="some value" />
<input type="hidden" name="bar.foos[1].attr2" value="some other value" />

如果你有合适的getter/setter，它应该在提交表单时设置所有的值.

If you have proper getter/setter, it should set all the values when the form is being submitted.

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