Java调用https接口，避免证书的方式

一、使用httpClient调用

　　1、使用maven添加依赖

<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.3</version>
        </dependency>

　　2、测试

package com.moy.whymoy.test;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.*;
import java.io.*;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * [Project]:whymoy  <br/>
 * [Email]:moy25@foxmail.com  <br/>
 * [Date]:2018/3/14  <br/>
 * [Description]:  <br/>
 *
 * @author YeXiangYang
 */
public class Main {

    public static void main(String[] args) throws IOException, NoSuchAlgorithmException, KeyStoreException, KeyManagementException {

        String url = "https://kyfw.12306.cn/otn/";
        try (CloseableHttpClient httpClient = createHttpClient()) {
            HttpGet httpGet = new HttpGet(url);
            try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) {
                HttpEntity entity = httpResponse.getEntity();
                String result = EntityUtils.toString(entity);
                EntityUtils.consume(entity);
                
                System.out.printf(result);
            }
        }
    }


    private static CloseableHttpClient createHttpClient() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {
        SSLContext sslcontext = SSLContexts.custom()
                .loadTrustMaterial(null, (chain, authType) -> true)
                .build();

        SSLConnectionSocketFactory sslSf = new SSLConnectionSocketFactory(sslcontext, null, null,
                new NoopHostnameVerifier());

        return HttpClients.custom().setSSLSocketFactory(sslSf).build();
    }
}

二、使用原生HttpsURLConnection调用

package com.moy.whymoy.test;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * [Project]:whymoy  <br/>
 * [Email]:moy25@foxmail.com  <br/>
 * [Date]:2018/3/27  <br/>
 * [Description]:  <br/>
 *
 * @author YeXiangYang
 */
public class Run {

    public static void main(String[] args) throws KeyManagementException, NoSuchAlgorithmException, IOException {

        String url = "https://kyfw.12306.cn/otn/";

        SSLContext sc = createSslContext();
        HttpsURLConnection conn = (HttpsURLConnection) new URL(url).openConnection();
        conn.setSSLSocketFactory(sc.getSocketFactory());
        conn.setHostnameVerifier((s, sslSession) -> true);
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.connect();
        StringBuilder result = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
            String line;
            while (null != (line = br.readLine())) {
                result.append(line).append("
");
            }
        }
        conn.disconnect();

        System.out.printf(result.toString());
    }

    private static SSLContext createSslContext() throws NoSuchAlgorithmException, KeyManagementException {
        SSLContext sc = SSLContext.getInstance("SSL");

        sc.init(null, new TrustManager[]{new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

            }

            @Override
            public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        }}, new java.security.SecureRandom());

        return sc;
    }
}

yexiangyang

moyyexy@gmail.com

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