Spring REST 控制器 post 请求

Question

我在 spring

中有这个控制器

@RestController
public class GreetingController {

    @RequestMapping(value = "/greeting",  method = RequestMethod.POST)
    public String greeting(@RequestParam("uouo") String uouo) {
        return uouo;
    }
}

当我测试它时

 curl -k -i -X POST -H "Content-Type:application/json"  -d uouo=test http://192.168.1.104:8080/api/greeting

测试结果

HTTP 状态 400 - 必需的字符串参数 'uouo' 不存在

我试过可能的事情，但我认为 @RequestParam 不能用于 POST 它总是使用 GET 在 URL 中传递参数，我只使用 post如果我使用 @RequestBody 将对象 JSON 作为参数，是否有任何方法可以使用 POST 发送字符串参数？

Answer 1

如果内容类型为 application/x-www-form-urlencoded，Servlet 容器将仅为 POST 请求的正文提供参数。如果内容类型是其他类型，它将忽略正文。这在 Servlet Specification Chapter 3.1.1 When Parameters Are Available

中指定

The following are the conditions that must be met before post form data will be populated to the parameter set:

The request is an HTTP or HTTPS request.

The HTTP method is POST.

The content type is application/x-www-form-urlencoded.

The servlet has made an initial call of any of the getParameter family of methods on the request object.

If the conditions are not met and the post form data is not included in the parameter set, the post data must still be available to the servlet via the request object’s input stream. If the conditions are met, post form data will no longer be available for reading directly from the request object’s input stream.

由于您没有发送任何内容JSON，只需设置适当的内容类型

curl -k -i -X POST -H "Content-Type:application/x-www-form-urlencoded" -d uouo=test http://192.168.1.104:8080/api/greeting

或者让curl推断

curl -k -i -X POST -d uouo=test http://192.168.1.104:8080/api/greeting?uouo=test

请注意，您仍然可以在 URL

中传递查询参数

curl -k -i -X POST -H "Content-Type:application/json"  http://192.168.1.104:8080/api/greeting?uouo=test

Spring REST 控制器 post 请求

Spring REST controller post request

java

servlets

spring-mvc