HttpClient Send GET/POST Request

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.StringRequestEntity;

/**
 * Send Get Request
 */
public void getRequest(String url) {

    HttpClient client = new HttpClient();
    GetMethod getMethod = new GetMethod(url);

    try {

        int statusCode = client.executeMethod(getMethod);

        if (statusCode == HttpStatus.SC_OK) {
            //TODO
        } else {
            throw new Exception("Failed to get: " + getMethod.getResponseBodyAsString());
        }

    } catch (Exception e) {
        logger.error(e);
    } finally {
        //release connection
        getMethod.releaseConnection();
    }
}

/**
 * Send Post Request with JSON
 * @return JSON from Response
 */
private JsonObject postRequest(String url, JsonObject requestBody) {
    JsonObject responseJsonObj = null;

    HttpClient httpClient = new HttpClient();
    PostMethod postRequest = new PostMethod(url);

    try {
        StringRequestEntity requestEntity = new StringRequestEntity(jsonString, "application/json", "UTF-8");
        //set request body
        postRequest.setRequestEntity(requestEntity);
        //set request header
        postRequest.addRequestHeader("Content-Type", "application/json");
        postRequest.addRequestHeader("Accept", "application/json");
        //execute post request
        httpClient.executeMethod(postRequest);

        int statusCode = postRequest.getStatusCode();
        if (statusCode == HttpStatus.SC_OK) {
            String postResponse = postRequest.getResponseBodyAsString();
            JsonParser parser = new JsonParser();
            responseJsonObj = (JsonObject) parser.parse(postResponse);
        } else {
            throw new Exception("Failed to post data: " + postRequest.getResponseBodyAsString());
        }

    }catch (Exception ex) {
        logger.error(ex);
    } finally {
        //release connection
        postRequest.releaseConnection();
    }
    return responseJsonObj;
}

Note:
1. Here need to depend on "commons-httpclient.jar"
2. For post request, if request header not be set, may throw "General Error: Request method 'POST' not supported "