Java原生的Http发送方法（不依赖框架）

package com.zcloudflow.util;


import javax.net.ssl.*;
import java.io.*;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.X509Certificate;


/**
 * 通用http发送方法
 *
 * @author Runner
 */
public class HttpUtils {
    
    

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url   发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
    
    
        return sendGet(url, param, "UTF-8");
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url         发送请求的 URL
     * @param param       请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @param contentType 编码类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param, String contentType) {
    
    
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try {
    
    
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            URLConnection connection = realUrl.openConnection();
            connection.setRequestProperty("Accept", "*/*");
            connection.setRequestProperty("Accept-Encoding", "gzip, deflate");
            connection.setRequestProperty("Accept-Language", "zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6");
            connection.setRequestProperty("Cache-Control", "max-age=0");
            connection.setRequestProperty("Proxy-Connection", "Keep-Alive");
            connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 Edg/105.0.1343.33");
            connection.connect();
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
            String line;
            while ((line = in.readLine()) != null) {
    
    
                result.append(line);
            }
        } catch (ConnectException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendGet ConnectException, urlNameString=" + url + ",param=" + param, e);
        } catch (SocketTimeoutException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
        } catch (IOException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
        } catch (Exception e) {
    
    
            throw new RuntimeException("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
        } finally {
    
    
            try {
    
    
                if (in != null) {
    
    
                    in.close();
                }
            } catch (Exception ex) {
    
    
                throw new RuntimeException("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url   发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
    
    
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try {
    
    
            String urlNameString = url;
            URL realUrl = new URL(urlNameString);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
    
    
                result.append(line);
            }
        } catch (ConnectException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        } catch (SocketTimeoutException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        } catch (IOException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        } catch (Exception e) {
    
    
            throw new RuntimeException("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        } finally {
    
    
            try {
    
    
                if (out != null) {
    
    
                    out.close();
                }
                if (in != null) {
    
    
                    in.close();
                }
            } catch (IOException ex) {
    
    
                throw new RuntimeException("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendSSLPost(String url, String param) {
    
    
        StringBuilder result = new StringBuilder();
        String urlNameString = url + "?" + param;
        try {
    
    
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[]{
    
    new TrustAnyTrustManager()}, new java.security.SecureRandom());
            URL console = new URL(urlNameString);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);

            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String ret = "";
            while ((ret = br.readLine()) != null) {
    
    
                if (ret != null && !ret.trim().equals("")) {
    
    
                    result.append(new String(ret.getBytes("ISO-8859-1"), "utf-8"));
                }
            }
            conn.disconnect();
            br.close();
        } catch (ConnectException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
        } catch (SocketTimeoutException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        } catch (IOException e) {
    
    
            throw new RuntimeException("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
        } catch (Exception e) {
    
    
            throw new RuntimeException("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
        }
        return result.toString();
    }

    private static class TrustAnyTrustManager implements X509TrustManager {
    
    
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) {
    
    
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) {
    
    
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
    
    
            return new X509Certificate[]{
    
    };
        }
    }

    private static class TrustAnyHostnameVerifier implements HostnameVerifier {
    
    
        @Override
        public boolean verify(String hostname, SSLSession session) {
    
    
            return true;
        }
    }
}