java restful服务中如何使用json参数 [英] How to consume json parameter in java restful service

问题描述

我如何在我的 webservice 中使用 json 参数，我可以使用 @PathParam 获取参数，但是获取 json 数据作为参数不知道该怎么做.

How can i consume json parameter in my webservice, I can able to get the parameters using @PathParam but to get the json data as parameter have no clue what to do.

@GET
@Path("/GetHrMsg/json_data")
@Consumes({ MediaType.APPLICATION_JSON })
@Produces(MediaType.APPLICATION_JSON)
public String gethrmessage(@PathParam("emp_id") String empid) {

}

用什么来代替@PathParam 以及以后如何解析它.

What to use in place of @PathParam and how to parse it later.

推荐答案

我假设您在谈论使用随请求发送的 JSON 消息正文.

I assume that you are talking about consuming a JSON message body sent with the request.

如果是这样，请注意，虽然没有被完全禁止，但人们普遍认为 GET 请求应该不具有请求主体.请参阅HTTP GET with request body"问题以了解原因.

If so, please note that while not forbidden outright, there is a general consensus that GET requests should not have request bodies. See the "HTTP GET with request body" question for explanations why.

我提到这一点只是因为您的示例显示了一个 GET 请求.如果您正在执行 POST 或 PUT，请继续阅读，但如果您真的在项目中执行 GET 请求，我建议您改为遵循 kondu 的解决方案.

I mention this only because your example shows a GET request. If you are doing a POST or PUT, keep on reading, but if you are really doing a GET request in your project, I recommend that you instead follow kondu's solution.

话虽如此，要使用 JSON 或 XML 消息正文，请包含一个(未注释的)方法参数，该参数本身就是表示消息的 JAXB bean.

With that said, to consume a JSON or XML message body, include an (unannotated) method parameter that is itself a JAXB bean representing the message.

因此，如果您的消息正文如下所示:

So, if your message body looks like this:

{"hello":"world","foo":"bar","count":123}

然后您将创建一个如下所示的相应类:

Then you will create a corresponding class that looks like this:

@XmlRootElement
public class RequestBody {
    @XmlElement String hello;
    @XmlElement String foo;
    @XmlElement Integer count;
}

您的服务方法将如下所示:

And your service method would look like this:

@POST
@Path("/GetHrMsg/json_data")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public void gethrmessage(RequestBody requestBody) {
    System.out.println(requestBody.hello);
    System.out.println(requestBody.foo);
    System.out.println(requestBody.count);
}

输出:

world
bar
123

<小时>

有关使用 JAXB 使用不同类型 HTTP 数据的更多信息，我建议您查看问题如何在 RESTful POST 方法中访问参数"，其中有一些很棒的信息.

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For more information about using the different kinds of HTTP data using JAXB, I'd recommend you check out the question "How to access parameters in a RESTful POST method", which has some fantastic info.

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