Java中get/post的https请求忽略ssl证书认证浅析

import org.apache.http.client.HttpClient;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import java.nio.charset.StandardCharsets;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
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 SslUtils {
    private static void trustAllHttpsCertificates() throws Exception {
        TrustManager[] trustAllCerts = new TrustManager[1];
        TrustManager tm = new miTM();
        trustAllCerts[0] = tm;
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, null);
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    }

    static class miTM implements TrustManager, X509TrustManager {
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        public boolean isServerTrusted(X509Certificate[] certs) {
            return true;
        }

        public boolean isClientTrusted(X509Certificate[] certs) {
            return true;
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) throws CertificateException {
            return;
        }

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) throws CertificateException {
            return;
        }
    }

    /**
     * 忽略HTTPS请求的SSL证书，必须在openConnection之前调用
     *
     * @throws Exception
     */
    public static void ignoreSsl() throws Exception {
        HostnameVerifier hv = new HostnameVerifier() {
            @Override
            public boolean verify(String urlHostName, SSLSession session) {
                System.out.println("Warning: URL Host: " + urlHostName + " vs. " + session.getPeerHost());
                return true;
            }
        };
        trustAllHttpsCertificates();
        HttpsURLConnection.setDefaultHostnameVerifier(hv);
    }

    /**
     * 避免HttpClient的”SSLPeerUnverifiedException: peer not authenticated”异常
     * <p>
     * 不用导入SSL证书
     *
     * @param base
     * @return
     */
    public static HttpClient wrapClient(HttpClient base) {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
                @Override
                public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {}
                @Override
                public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {}
            };
            ctx.init(null, new TrustManager[]{tm}, null);
            SSLConnectionSocketFactory ssf = new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);
            CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(ssf).build();
            return httpclient;
        } catch (Exception ex) {
            ex.printStackTrace();
            return HttpClients.createDefault();
        }
    }

    /**
     * 跳过证书效验的sslcontext
     *
     * @return
     * @throws Exception
     */
    private static SSLContext createIgnoreVerifySSL() throws Exception {
        SSLContext sc = SSLContext.getInstance("TLS");

        // 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法
        X509TrustManager trustManager = new X509TrustManager() {
            @Override
            public void checkClientTrusted(java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
                                           String paramString) throws CertificateException {
            }

            @Override
            public void checkServerTrusted(java.security.cert.X509Certificate[] paramArrayOfX509Certificate,
                                           String paramString) throws CertificateException {
            }

            @Override
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
        sc.init(null, new TrustManager[] { trustManager }, null);
        return sc;
    }

    /**
     * 构造RestTemplate
     *
     * @return
     * @throws Exception
     */
    public static RestTemplate getRestTemplate() throws Exception {
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        // 超时
//        factory.setConnectionRequestTimeout(5000);
//        factory.setConnectTimeout(5000);
//        factory.setReadTimeout(5000);
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(createIgnoreVerifySSL(),
                // 指定TLS版本
                null,
                // 指定算法
                null,
                // 取消域名验证
                new HostnameVerifier() {
                    @Override
                    public boolean verify(String string, SSLSession ssls) {
                        return true;
                    }
                });
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
        factory.setHttpClient(httpClient);
        RestTemplate restTemplate = new RestTemplate(factory);
        // 解决中文乱码问题
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        return restTemplate;
    }
}

 @Override
    public void completionIndexPushToODS(List<Bean> data) throws Exception {
        try {
        	//请求地址
            String url ="https://.....";
            //请求参数
            String requestData = JSON.toJSONString(data);
            System.out.println("请求参数：" + requestData);

            RestTemplate restTemplate;
            if (flag) {
            	//HTTP绕过SSL证书认证
                restTemplate = SslUtils.getRestTemplate();
            } else {
            	//普通请求方式
                restTemplate = new RestTemplate();
            }
            //自定义header传输信息（根据自己的需求设置）
            HttpHeaders httpHeaders = new HttpHeaders();
            httpHeaders.setContentType(MediaType.APPLICATION_JSON_UTF8);
            
            HttpEntity<MultiValueMap<String, String>> httpEntity = new HttpEntity(JSON.toJSON(data), httpHeaders);
            URI uri = new URI(url);
            System.out.println("开始请求");
            //POST返回字节方式
            byte[] response = restTemplate.postForObject(uri, httpEntity, byte[].class);
           	//GET请求返回字符
            //String request = restTemplate.getForObject(uri, String.class);

            System.out.println("请求结束");
            if (response == null) {
                System.out.println("返回值为空");
            }
            String result = new String(response, "utf-8");
            System.out.println("返回结果：" + result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }