封装HttpClient工具类

小灰灰 2023-07-13 12:14 38阅读 0赞

添加依赖：

<dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>4.5.3</version>
            </dependency>

代码：

public class HttpUtil {
    
    
        /**
         * get请求
         * @param url
         * @param param
         * @return
         */
        public static String doGet(String url, Map<String, Object> param) {
            //创建默认的httpclient实例
            CloseableHttpClient httpClient = HttpClients.createDefault();
            //响应对象
            CloseableHttpResponse response = null;
            //返回结果
            String resultStr = "";
            try {
                URIBuilder builder = new URIBuilder(url);
                if (param != null) {
                    for (String key : param.keySet()) {
                        builder.addParameter(key, String.valueOf(param.get(key)));
                    }
                }
                URI uri = builder.build();
                HttpGet httpGet = new HttpGet(uri);
                response = httpClient.execute(httpGet);
    
                if (response!=null && response.getStatusLine().getStatusCode() == 200){
                    HttpEntity httpEntity = response.getEntity();
                    resultStr = EntityUtils.toString(httpEntity,"UTF-8");
                }
    
            } catch (URISyntaxException e) {
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    if (response != null) {
                        response.close();
                    }
                    httpClient.close();
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
            }
            return resultStr;
        }
    
    
        /**
         * Post请求
         * @param url
         * @param param
         * @return
         */
        public static String doPost(String url, Map<String, Object> param, Map<String, Object> headData) {
            CloseableHttpClient httpClient = HttpClients.createDefault();
            CloseableHttpResponse response = null;
            String resultString = "";
    
            try {
            HttpPost httpPost = new HttpPost(url);
                if (param != null) {
                    List<NameValuePair> formParams = new ArrayList<NameValuePair>();
                    for (String key : param.keySet()) {
                        formParams.add(new BasicNameValuePair(key, String.valueOf(param.get(key))));
                    }
                    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams,"UTF-8");
                    httpPost.setEntity(entity);
                }
                //携带head数据
                if (headData != null && headData.size() > 0) {
                    for (String key : headData.keySet()) {
                        httpPost.setHeader(key, (String) headData.get(key));
                    }
                }
    
                //执行post请求
                response = httpClient.execute(httpPost);
    
                if (response!=null && response.getStatusLine().getStatusCode() == 200) {
                    resultString = EntityUtils.toString(response.getEntity(),"UTF-8");
                }
    
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    if (response != null) {
                        response.close();
                    }
                    httpClient.close();
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
    
            return resultString;
        }
    }