java HTTP请求工具类-代码

矫情吗；* 2022-03-27 05:54 305阅读 0赞

import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
    
    import java.io.BufferedReader;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.*;
    
    /**
     * @author wangwei
     * @version v1.0.0
     * @description HTTP工具类
     * @date 2019-01-12
     */
    public class HttpClient {
    
        public static JSONObject postJson(String reqUrl, JSONObject jsonParam) throws Exception {
    
            DefaultHttpClient htClient = new DefaultHttpClient();
    
            HttpPost method = new HttpPost(reqUrl);
    
            StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8");
            entity.setContentEncoding("UTF-8");
            entity.setContentType("application/json");
            method.setEntity(entity);
            HttpResponse result = htClient.execute(method);
            String resData = EntityUtils.toString(result.getEntity());
            JSONObject resJson = JSONObject.parseObject(resData);
            return resJson;
        }
    
        public static String post(String reqUrl, Map<String, String> reqParams) throws Exception {
            if (reqParams == null) {
                reqParams = new HashMap<>();
            }
            System.out.println("请求地址：" + reqUrl);
            System.out.println("请求参数：" + JSON.toJSONString(reqParams));
            CloseableHttpClient client = HttpClients.createDefault();
            HttpPost post = new HttpPost(reqUrl);
            try {
                List<NameValuePair> params = new ArrayList<NameValuePair>();
                for (String key : reqParams.keySet()) {
                    params.add(new BasicNameValuePair(key, reqParams.get(key)));
                }
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(params, "UTF-8");
                /* 设置参数 */
                post.setEntity(urlEncodedFormEntity);
                HttpResponse response = client.execute(post);
                HttpEntity entity = response.getEntity();
                String returnMsg = EntityUtils.toString(entity, "UTF-8");
                return returnMsg;
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            } finally {
                /* 释放链接 */
                post.releaseConnection();
            }
        }
    
        public static String get(String reqUrl, Map<String, String> reqParams) throws Exception {
            System.out.println("请求地址：" + reqUrl);
            System.out.println("请求参数：" + JSON.toJSONString(reqParams));
            return execute(reqUrl, reqParams, "GET");
        }
    
        public static String execute(String reqUrl, Map<String, String> reqParams, String method) throws Exception {
            return execute(reqUrl, reqParams, method, "application/x-www-form-urlencoded");
        }
    
        public static String execute(String reqUrl, Map<String, String> reqParams, String method, String contentType)
                throws Exception {
            String response = "";
            String invokeUrl = reqUrl;
            URL serverUrl = new URL(invokeUrl);
            HttpURLConnection conn = (HttpURLConnection) serverUrl.openConnection();
    
            conn.setReadTimeout(5000);
            conn.setRequestMethod(method);
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
    
            if (reqParams != null && reqParams.size() > 0) {
                conn.setRequestProperty("Cookie", reqParams.get("Cookie") + "");
                reqParams.remove("Cookie");
            }
            conn.setRequestProperty("connection", "keep-alive");
            conn.setRequestProperty("Charsert", "UTF-8");
            conn.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
            conn.setRequestProperty("Content-Type", contentType);
            // 传递参数
            String content = getStringData(reqParams);
            byte[] bypes = content.toString().getBytes();
            conn.getOutputStream().write(bypes);
            conn.connect();
    
            InputStream is = conn.getInputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(is, "utf-8"));
            StringBuffer buffer = new StringBuffer();
            String line = "";
            while ((line = in.readLine()) != null) {
                buffer.append(line);
            }
            response = buffer.toString();
            conn.disconnect();
            return response;
        }
    
        public static String getStringData(Map<String, String> params) {
            StringBuffer content = new StringBuffer();
            List<String> keys = new ArrayList<String>(params.keySet());
            Collections.sort(keys);
    
            for (int i = 0; i < keys.size(); i++) {
                String key = (String) keys.get(i);
                String value = params.get(key);
                if (value != null) {
                    content.append((i == 0 ? "" : "&") + key + "=" + value);
                } else {
                    content.append((i == 0 ? "" : "&") + key + "=");
                }
            }
            return content.toString();
        }
    
    
    }