HttpRequest

get

/**
 * 发送HttpGet请求
 * @param url
 * @return
 */
public static String doGet(String url) {
    //1.获得一个httpclient对象
    CloseableHttpClient httpclient = HttpClients.createDefault();
    //2.生成一个get请求
    HttpGet httpget = new HttpGet(url);
    CloseableHttpResponse response = null;
    try {
        //3.执行get请求并返回结果
        response = httpclient.execute(httpget);
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    String result = null;
    try {
        //4.处理结果，这里将结果返回为字符串
        HttpEntity entity = response.getEntity();
        if (entity != null) {
            result = EntityUtils.toString(entity);
        }
    } catch (ParseException | IOException e) {
        e.printStackTrace();
    } finally {
        try {
            response.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return result;
}

post

/**
 * 发送HttpPost请求，参数为map
 * @param url
 * @param map
 * @return
 */
public static String doPost(String url, Map<String, Object> map) {
    CloseableHttpClient httpclient = HttpClients.createDefault();
    List<NameValuePair> formparams = new ArrayList<NameValuePair>();
    for (Map.Entry<String, Object> entry : map.entrySet()) {
        //给参数赋值
        formparams.add(new BasicNameValuePair(entry.getKey(),              String.valueOf(entry.getValue())));
    }
    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
    HttpPost httppost = new HttpPost(url);
    httppost.setEntity(entity);
    CloseableHttpResponse response = null;
    try {
        response = httpclient.execute(httppost);
    } catch (IOException e) {
        e.printStackTrace();
    }
    HttpEntity entity1 = response.getEntity();
    String result = null;
    try {
        result = EntityUtils.toString(entity1);
    } catch (ParseException | IOException e) {
        e.printStackTrace();
    }
    return result;
}