[网络协议]请求https，X509证书信任管理器类，避免导证书

实现X509证书信任管理器类（避免导证书）

package com.showlin.httpsDemo;

import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * @Author：xielin
 * @Description: 实现X509证书信任管理器类（避免导证书）
 * @Date：2022/3/29 9:29
 * @Version: 1.0
 */
public class MyX509TrustManager implements X509TrustManager {

    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {

    }

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

    }

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

HttpRequest 和 测试

package com.showlin.httpsDemo;

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.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * @Author：xielin
 * @Description:
 * @Date：2022/3/29 9:31
 * @Version: 1.0
 */
public class HttpRequest {
    // JAVA实现HTTPS接口（POST方式）https://blog.csdn.net/s13554341560b/article/details/78872902
    // java 网络请求 支持https 记录cookie并带入请求https://blog.csdn.net/s13488941815/article/details/87186075

    public static String allcookie;
    public static String firstCookie;

    /**
     * 向指定 URL 发送POST方法的请求 http或https
     *
     * @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) {
        // System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");
        // java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            if (url.startsWith("https")) {
                // 创建SSLContext对象，并使用我们指定的信任管理器初始化
                TrustManager[] tm = {new MyX509TrustManager()};
                SSLContext sslContext = SSLContext.getInstance("SSL");
                sslContext.init(null, tm, new java.security.SecureRandom());
                // 从上述SSLContext对象中得到SSLSocketFactory对象
                SSLSocketFactory ssf = sslContext.getSocketFactory();
                HostnameVerifier hv = new HostnameVerifier() {
                    @Override
                    public boolean verify(String urlHostName, SSLSession session) {
                        return true;
                    }
                };
                HttpsURLConnection.setDefaultHostnameVerifier(hv);

                // Https 请求
                HttpsURLConnection conn = (HttpsURLConnection) realUrl.openConnection();
                conn.setSSLSocketFactory(ssf);
                result = handleSend(conn, out, in, param);
            } else {
                // http 请求
                HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
                result = handleSend(conn, out, in, param);
            }
            // System.out.println("-----result-----" + result);
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

    private static String handleSend(URLConnection conn, PrintWriter out, BufferedReader in, String param) throws IOException {
        String result = "";
        // 设置通用的请求属性
        conn.setRequestProperty("accept", "*/*");
        // todo
        // conn.addRequestProperty("Cookie", allcookie);
        // conn.setRequestProperty("Authorization", "");
        conn.setRequestProperty("connection", "Keep-Alive");
        conn.setRequestProperty("content-Type", "application/json");
        conn.setRequestProperty("user-agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        // 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();

        // 保存cookie 根据实际需要是否登录后保存cookie
        Map<String, List<String>> map=conn.getHeaderFields();

        Set<String> set=map.keySet();
        for (Iterator iterator = set.iterator(); iterator.hasNext();) {
            String key = (String) iterator.next();
            if (key!=null&&key.equals("Set-Cookie")) {
                System.out.println("key=" + key+",开始获取cookie");
                List<String> list = map.get(key);
                StringBuilder builder = new StringBuilder();
                for (String str : list) {
                    builder.append(str).toString();
                }
                firstCookie=builder.toString();
                allcookie+=firstCookie+";";
                System.out.println("第一次得到的cookie="+firstCookie);
            }
        }

        // 定义BufferedReader输入流来读取URL的响应
        in = new BufferedReader(
                new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
        return result;
    }


    public static void main(String[] args) throws Exception {
        // String url = "http://***.com/dataService/manage/people/idinfo";
        // Map<String, Object> param = new HashMap<String, Object>();
        // param.put("idNo", "362424195501171123");
        // String message = new JSONObject(param).toJSONString(4);
        // System.out.println(message);
        // System.out.println(HttpRequest.sendPost(url, message));

        String url = "https://ip:20001/apiv1/authority/login";
        String message = "{\"lang\":\"zh-CN\",\"tz\":\"+8:00\",\"platform\":\"web\",\"agent\":\"ZK\",\"intfVer\":\"1.0.0\",\"sys\":\"magic-cube\",\"sessionId\":null,\"payload\":{\"params\":{\"username\":\"Admin\",\"password\":\"21232f297a57a5a\"}}}";
        System.out.println(HttpRequest.sendPost(url, message));
    }
}