带有JSON的HTTP POST-错误的参数

Question

I'm trying to invoke a REST Service which accepts a json with the two parameters param1 and param2 , as below:

[{
"param1": "xxx",
"param2": "xxx"
}]

Following my code invoking MY_SERVICE_URL:

HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost(MY_SERVICE_URL);        
String json = new String("[{\"param1\": \"" + "param1Value" + "\",\"param2\": \"" + "param2Value" + "\"}]");
request.setEntity(new StringEntity(json));
request.setHeader("Content-Type", "application/json");
request.setHeader("Accept", "application/json");

try {
    HttpResponse response = client.execute(request);
    int responseCode = response.getStatusLine().getStatusCode();
    BufferedReader rd = new BufferedReader (new InputStreamReader(response.getEntity().getContent()));
    String output = rd.readLine();
    System.out.println("Response code: " + responseCode);
    System.out.println("Output: " + output);
} catch(Exception ex) {
    System.out.println("Error");
}

client.getConnectionManager().shutdown();

The POST is failing because it's not recognizing the first parameter as valid: instead of reading param1 it's considering the parameter \\"param1\\"

Any help is appreciated Thanks Simone

Answer 1

Use the below snippet to create JSON for posting over your webservice/api. Hope it helps Add the following reference too import org.json.simple.JSONObject;

JSONObject item = new JSONObject();
item.put("param1", "testValue1");
item.put("param2", 123);
item.put("param3", "testValue3");

String json = item.toString();