Spring MVC如何在我的控制器方法中获取GET HTTP Request的参数值？ [英] Spring MVC How take the parameter value of a GET HTTP Request in my controller method?

问题描述

在此期间我正在研究Spring MVC展示示例（可从STS dasboard下载），我有一些关于 Request Mapping 示例的简单问题：

In this period I am studing the Spring MVC showcase example (downloadable from STS dasboard) and I have some simple question about the Request Mapping examples:

1）在我的 home.jsp 页面中，我有这个链接：

1) In my home.jsp page I have this link:

        <li>
            <a id="byParameter" class="textLink" href="<c:url value="/mapping/parameter?foo=bar" />">By path, method, and presence of parameter</a>
        </li>

正如您在此链接中所看到的，我正在执行一个包含foo参数的HTTP GET请求值：bar。

As you can see by this link I am doing an HTTP GET Request having a "foo" parameter containing the value: "bar".

此HTTP请求由控制器类MappingController的以下方法处理：

This HTTP Request is handled by the following method of the controller class MappingController:

@RequestMapping(value="/mapping/parameter", method=RequestMethod.GET, params="foo")
public @ResponseBody String byParameter() {
    return "Mapped by path + method + presence of query parameter! (MappingController)";
}

此方法管理HTTP请求（仅 GET type），其参数名为foo

This method manage HTTP Request (only GET type) that have a parameter named "foo"

如何获取此参数的值（bar）并将其放入变量中在我的参数方法的代码中？

How can I take the value ("bar") of this parameter and put it in a variable inside the code of my by Parameter method?

推荐答案

如文档，使用 @ RequestParam 注释：

public @ResponseBody String byParameter(@RequestParam("foo") String foo) {
    return "Mapped by path + method + presence of query parameter! (MappingController) - foo = "
           + foo;
}

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