Java httpclient.CloseableHttpClient跳过https证书验证

本文转自：https://www.cnblogs.com/jtwbdm/p/11507121.html

当初联调某网站API（https），对方却未提供SSL证书，且一再强调无需证书，只好通过搜索网络资源设法绕过HTTPS证书验证。

原文博主的方法正好符合我的需求，转载至此以做个人记录。

正文：

    调用SkipHttpsUtil.wrapClient方法获取httpclien对象，通过该对象（可强转为CloseableHttpClient）发送请求，即可跳过https证书验证。

skipHttpsUtil类

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

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.apache.log4j.Logger;

/**
 * Description: httpclient跳过https验证
 */
public class SkipHttpsUtil {
    private static Logger logger = Logger.getLogger(SkipHttpsUtil.class);
    //绕过证书
    public static HttpClient wrapClient() {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
 
                public void checkClientTrusted(X509Certificate[] arg0,
                        String arg1) throws CertificateException {
                }
 
                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 e) {
            return HttpClients.createDefault();
        }
    }    
}