https/http访问接口工具类，附带ssl忽略证书验证，以及head头部的添加-java版

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package utils;import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import javax.net.ssl.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.X509Certificate;
import java.util.List;/*** @author lpx* @create 2021-06-28 11:17* @Description http请求工具类* @Version 1.0*/@Slf4j
@Component
public class HttpSendUtils {public static String sendHeaderPostWb(String url, String contentType, String param, List<String> headers) {PrintWriter out = null;BufferedReader in = null;String result = "";HttpURLConnection conn = null;try {URL realUrl = new URL(url);boolean isHttps = "https".equalsIgnoreCase(realUrl.getProtocol());if (isHttps) {// 创建一个忽略证书验证的SSLContextSSLContext sslContext = SSLContext.getInstance("TLS");sslContext.init(null, new X509TrustManager[]{new X509TrustManager() {@Overridepublic X509Certificate[] getAcceptedIssuers() {return null;}@Overridepublic void checkClientTrusted(X509Certificate[] certs, String authType) {}@Overridepublic void checkServerTrusted(X509Certificate[] certs, String authType) {}}}, new java.security.SecureRandom());// 安装所有的信任管理器（仅用于HTTPS）// 注意：在实际应用中，不建议这样做，因为它会绕过SSL/TLS的安全验证。// 这里只是为了演示如何忽略证书验证。SSLContext.setDefault(sslContext);// 创建一个HttpsURLConnection对象HostnameVerifier hv = new HostnameVerifier() {@Overridepublic boolean verify(String hostname, SSLSession session) {return true; // 接受任何主机名}};conn = (HttpsURLConnection) realUrl.openConnection();((HttpsURLConnection) conn).setHostnameVerifier(hv);}else{conn = (HttpURLConnection) realUrl.openConnection();}// 设置通用的请求属性conn.setRequestProperty("Content-Type", contentType);conn.setRequestProperty("accept", "*/*");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("Accept-Charset", "UTF-8");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");if (!headers.isEmpty()) {for (String header : headers) {String[] parts = header.split(":");conn.setRequestProperty(parts[0].trim(), parts[1].trim());}}// 发送POST请求必须设置如下两行conn.setDoOutput(true);conn.setDoInput(true);// 获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());// 发送请求参数out.print(param);// flush输出流的缓冲out.flush();// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {e.printStackTrace();} finally {try {if (out != null) {out.close();}if (in != null) {in.close();}} catch (IOException ex) {ex.printStackTrace();}}return result;}
}