HttpClient发送Get、Post请求简单实践

HttpClient发送Get、Post请求简单实践

https://blog.csdn.net/swordgirl2011/article/details/53297146

1. 配置及实例化HttpClient:

private static final CloseableHttpClient httpclient;
    public static final String CHARSET = "UTF-8";


    static{
        RequestConfig config = RequestConfig.custom().setConnectTimeout(5000).setSocketTimeout(3000).build();
        httpclient = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
    }

2. 发送Get请求方法：

/**
     * HTTP Get 获取内容
     * @param url请求的url地址 ?之前的地址
     * @param params请求的参数
     * @param charset编码格式
     * @return 页面内容
     */
    public static String sendGet(String url, Map<String, Object> params) throws ParseException, UnsupportedEncodingException, IOException{

        if(params !=null && !params.isEmpty()){

            List<NameValuePair> pairs = new ArrayList<NameValuePair>(params.size());

            for (String key :params.keySet()){
                pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
            }
            url +="?"+EntityUtils.toString(new UrlEncodedFormEntity(pairs), CHARSET);
        }

        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = httpclient.execute(httpGet);
        int statusCode = response.getStatusLine().getStatusCode();
        if(statusCode !=200){
            httpGet.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
            EntityUtils.consume(entity);
            response.close();
            return result;
        }else{
            return null;
        }
    }

3. 发送Post请求方法：

/**
 * HTTP Post 获取内容
 * @param url请求的url地址 ?之前的地址
 * @param params请求的参数
 * @param charset编码格式
 * @return 页面内容
 * @throws IOException
 * @throws ClientProtocolException
 */

public static String sendPost(String url, Map<String, Object> params) throws ClientProtocolException, IOException {

        List<NameValuePair> pairs = null;
        if (params != null && !params.isEmpty()) {
            pairs = new ArrayList<NameValuePair>(params.size());
            for (String key : params.keySet()) {
                pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
        }
        }
        HttpPost httpPost = new HttpPost(url);
        if (pairs != null && pairs.size() > 0) {
            httpPost.setEntity(new UrlEncodedFormEntity(pairs, CHARSET));
        }
        CloseableHttpResponse response = httpclient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpPost.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
            EntityUtils.consume(entity);
            response.close();
            return result;
        }else{
             return null;
        }
}

4. 编写测试用例，进行Get 、Post请求方法的测试

4.1 测试Get方法，e .g:

@Test
public void testGet() throws ParseException, UnsupportedEncodingException, IOException {
    String testUrl01 = "具体的测试接口地址";
    Map<String, Object> params01 = new HashMap<>();
    params01.put("参数01", "对应的参数取值");
    params01.put("参数02", "<span style="font-family:Arial, Helvetica, sans-serif;">对应的参数取值</span><span style="font-family:Arial, Helvetica, sans-serif;">");</span>
    System.out.println(sendGet(testUrl01, params01));

}

4.2 测试Post方法，e.g:

@Test
    public void testPost() throws ClientProtocolException, IOException {

        String testUrl02 = "具体的测试接口地址";
        Map<String, Object> params02 = new HashMap<>();
        params02.put("参数01", "对应的参数取值");
        params02.put("参数02", "对应的参数取值");
        System.out.println(sendPost(testUrl02, params02));

    }

最后

资料参考：http://blog.csdn.net/nevergiveuplzl/article/details/52304266