java - 如何将表单字段集合发布到 Spring Controller ？

Question

假设我有这样的表格:

<form method="post" action="/create">

    <input type="text" name="title.0" value="Curious George" />
    <input type="text" name="author.0" value="H.A. Rey" />
    <input type="text" name="date.0" value="2/23/1973" />

    <input type="text" name="title.1" value="Code Complete" />
    <input type="text" name="author.1" value="Steve McConnell" />
    <input type="text" name="date.1" value="6/9/2004" />

    <input type="text" name="title.2" value="The Two Towers" />
    <input type="text" name="author.2" value="JRR Tolkien" />
    <input type="text" name="date.2" value="6/1/2005" />

    <input type="submit" />
</form>

如何从 Spring MVC 3.0 Controller 解析它？

Answer 1

name 属性不必是唯一的。所以:

<input type="text" name="title" value="Curious George" />
<input type="text" name="title" value="Code Complete" />
<input type="text" name="title" value="The Two Towers" />

然后

@RequestMapping("/create")
public void create(
    @RequestParam("title") List<String> titles, 
    @RequestParam("author") List<String> authors, ..) {..}

应保留元素的顺序，根据 the spec :

The control names/values are listed in the order they appear in the document. The name is separated from the value by '=' and name/value pairs are separated from each other by '&'.