Java.HttpClient绕过Https证书解决方案二

Posted 2020-11-14 OMI天空

方案2

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.*;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class HttpRequest
{
    /**
     * 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 URL 所代表远程资源的响应结果
     */
    public static String Get(String url, String param)
    {
        return Get(url, param, false);
    }

    /**
     * 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 URL 所代表远程资源的响应结果
     */
    public static String Get(String url, String param, Boolean isHttpsRequest)
    {
        String result = "";
        BufferedReader in = null;
        try
        {
            if (isHttpsRequest)
            {
                HttpRequest.Instance().TrustHpps();
            }
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet())
            {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null)
            {
                result += line;
            }
        }
        catch (Exception e)
        {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception e2)
            {
                e2.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 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 Post(String url, String param)
    {
        return Post(url, param, false);
    }

    /**
     * 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。
     * @param isHttpsRequest  是否Https请求
     * @return 所代表远程资源的响应结果
     */
    public static String Post(String url, String param, Boolean isHttpsRequest)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try
        {
            if (isHttpsRequest)
            {
                HttpRequest.Instance().TrustHpps();
            }
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            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();
            // 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;
            }
        }
        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;
    }

    /**
     * 信任证书管理
     * */
    private static TrustManager[] TrustAllCerts = new TrustManager[]
    {
        new X509TrustManager()
        {
            @Override
            public void checkClientTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException
            {
                // TODO Auto-generated method stub
            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException
            {
                // TODO Auto-generated method stub
            }

            @Override
            public X509Certificate[] getAcceptedIssuers()
            {
                // TODO Auto-generated method stub
                return null;
            }
        }
    };

    /**
     * 主机证书认证
     * */
    private class NullHostNameVerifier implements HostnameVerifier
    {
        /*
         * (non-Javadoc)
         * @see javax.net.ssl.HostnameVerifier#verify(java.lang.String,
         * javax.net.ssl.SSLSession)
         */
        @Override
        public boolean verify(String arg0, SSLSession arg1)
        {
            // TODO Auto-generated method stub
            return true;
        }
    }

    private static HttpRequest _HttpRequest;

    /**
     * Http请求封装实例
     * */
    public static HttpRequest Instance()
    {
        if (_HttpRequest == null)
        {
            _HttpRequest = new HttpRequest();
        }
        return _HttpRequest;
    }

    /**
     * 信任HTTPS
     * */
    public void TrustHpps() throws Exception
    {
        HttpsURLConnection
                .setDefaultHostnameVerifier(new NullHostNameVerifier());
        SSLContext sc = SSLContext.getInstance("TLS");
        sc.init(null, HttpRequest.TrustAllCerts, new SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }
}

测试代码

        String  address="https网页地址";
         //绕过Https证书方案2
        String reslt2= HttpRequest.Get(address,null,true);
        System.out.println(reslt2);   
        //说明请求过程中没发生异常，且网页正常返回，就说明成功绕过Https证书；紫红色部分代码是关键代码