如何在HttpServletRequest中访问POST参数？ [英] How to access POST parameters in HttpServletRequest?

问题描述

我有一个基本上是服务代理的应用程序。该应用程序本身建在泽西岛上，由Jetty提供服务。我有这个资源方法：

I've got an app that's basically a proxy to a service. The app itself is built on Jersey and served by Jetty. I have this Resource method:

@POST
@Path("/{default: .*}")
@Timed
@Consumes("application/x-www-form-urlencoded")
public MyView post(@Context UriInfo uriInfo, @Context HttpServletRequest request) {
  ...
}

用户提交POST表单。所有POST请求都通过此方法。除了一个细节之外，UriInfo和HttpServletRequest被适当地注入：似乎没有参数。以下是我从终端发送的请求：

A user submits a POST form. All POST requests go through this method. The UriInfo and HttpServletRequest are injected appropriately except for one detail: there seem to be no parameters. Here is my request being sent from the terminal:

POST /some/endpoint HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate
Connection: keep-alive
Content-Length: 15
Content-Type: application/x-www-form-urlencoded; charset=utf-8
Host: localhost:8010
User-Agent: HTTPie/0.9.2

foo=bar&biz=baz

这里POST主体显然包含2个参数：foo和biz。但是当我尝试在我的代码（ request.getParameterMap ）中获取它们时，结果是一个大小为0的地图。

Here the POST body clearly contains 2 parameters: foo and biz. But when I try to get them in my code (request.getParameterMap) the result is a map of size 0.

如何从资源方法中访问这些参数或此参数字符串？如果重要的话，使用的 HttpServletRequest 的实现是org.eclipse.jetty.server.Request。

How do I access these parameters or this parameter string from inside my resource method? If it matters, the implementation of HttpServletRequest that is used is org.eclipse.jetty.server.Request.

推荐答案

三个选项

1. @FormParam（< param -name>） to gt individual params。例如

1. @FormParam("<param-name>") to gt individual params. Ex.

@POST
@Consumes("application/x-www-form-urlencoded")
public Response post(@FormParam("foo") String foo
                     @FormParam("bar") String bar) {}

使用多值地图获取所有参数

@POST
@Consumes("application/x-www-form-urlencoded")
public Response post(MultivaluedMap<String, String> formParams) {
    String foo = formParams.getFirst("foo");
}

使用表格获取所有参数。

@POST
@Consumes("application/x-www-form-urlencoded")
public Response post(Form form) {
    MultivaluedMap<String, String> formParams = form.asMap();
    String foo = formParams.getFirst("foo");
}

使用 @BeanParam 以及单个 @FormParam s来获取bean中的所有单个参数。

Use a @BeanParam along with individual @FormParams to get all the individual params inside a bean.

public class FormBean {
    @FormParam("foo")
    private String foo;
    @FormParam("bar")
    private String bar;
    // getters and setters
}

@POST
@Consumes("application/x-www-form-urlencoded")
public Response post(@BeanParam FormBean form) {
}

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