如何通过客户端的post方法使用json对象

Question

我有一个json对象，我需要通过post将其传递到我的服务器。json在我的客户端内部进行了硬编码。以下是我的服务器程序（test.java）-请注意，这是出于学习目的。因此，请清楚解释...

@Path("/json/product")
    public class Test {


        @POST
        @Path("/post")

        @Consumes(MediaType.APPLICATION_JSON)
        public Response createProductInJSON() {

            return Response.status(201).entity(....).build();



        }
      }

如何将json从客户端传递到服务器？

我遵循mkyong的http://www.mkyong.com/webservices/jax-rs/restful-java-client-with-jersey-client/教程（对post方法感到困惑）。从客户端程序中，需要通过硬编码的json格式来传递并通过post方法接收...在服务器上。json可以作为参数从客户端传递到服务器吗？否则如何做...下面是我的示例客户端程序。...

public static void main(String[] args) {

          try {

            URL url = new URL("http://localhost:8080/Snapshothealthapp1/rest/json/product/post");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            String JSON_DATA =
                     "{" 
                       + "  \"SnapshotRequest\": [" 
                       + "    {" 
                       + "      \"AuthenticationType\": \"email\"," 
                       + "      \"EmailAddress\": \"[email protected]\","                  
                       + "      \"Password\" : \"12345\"," 
                       + "      \"PracticeID\" : \"null\"," 
                       + "      \"DeviceID\" : \"null\""
                       + "    } +   ]"
                   + "}";
//          request.body("application/json", JSON_DATA);
//          String input = "{\"singer\":\"Metallica\",\"title\":\"Fade To Black\"}";

            OutputStream os = conn.getOutputStream();
            os.write(JSON_DATA.getBytes());
            os.flush();
            if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
                throw new RuntimeException("Failed : HTTP error code : "
                    + conn.getResponseCode());
            }

            BufferedReader br = new BufferedReader(new InputStreamReader(
                    (conn.getInputStream())));

            String output;
            System.out.println("Output from Server .... \n");
            while ((output = br.readLine()) != null) {
                System.out.println(output);
            }

            conn.disconnect();

          } catch (MalformedURLException e) {

            e.printStackTrace();

          } catch (IOException e) {

            e.printStackTrace();

         }

我需要将字符串json数据传递到我的服务器。任何人都可以为此提供客户端和服务器代码吗？

预先感谢

Answer 1

将@Consumes添加为“ application / json”并在JsonObject Type中指定方法参数。您必须添加了javax.json.jar（通常随JAX-RS一起提供。）>

@Path("/create")
@POST
@Consumes (MediaType.APPLICATION_JSON) //Specify the POST MediaType as "application/json"
@Produces(MediaType.APPLICATION_JSON)
public Book createBook(JsonObject postData //Consumable JSON Object param  ) {

     System.out.println( postData); //This prints the client's JSON object from the Request Body

     //Do your work here with the postData ..........
     String value1 = postData.getString("key1");
     int value2 = postData.getInt("key2");
     //................
     //........
     //.....
}